Test position

Discussion of anything and everything relating to chess playing software and machines.

Moderator: Ras

kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Test position

Post by kgburcham »

BS2830-24
[d] 8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - - bm Ka1
Top
User avatar
Zach Wegner
Posts: 1922
Joined: Thu Mar 09, 2006 12:51 am
Location: Earth

Re: Test position

Post by Zach Wegner »

just waiting for a matescore here...

Code: Select all

 14/24      0.486  +0.67   1. Kc1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kh1 8. Qb7 Kh2 9.
                             Qb8+ Kh1 (717774)
 14/24      0.814  +0.76   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kh1 8. Qxh7 g1=Q+ 9.
                             Qb1 (1470286)
[14/24]     0.833  +0.76   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kh1 8. Qxh7 g1=Q+ 9.
                             Qb1 (1534014)
 15/28      0.848  +0.80   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. h6 Kh1 8. h4 Kh2 9. Qc7+
                             Kh1 (1554207)
[15/28]     1.017  +0.80   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. h6 Kh1 8. h4 Kh2 9. Qc7+
                             Kh1 (1731611)
 16/28      1.079  +2.18   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. h6 Kh1 8. Qd5 Kh2 9. Qe5+
                             Kh1 10. Qe4 Kh2H (1822896)
[16/28]     1.116  +2.18   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. h6 Kh1 8. Qd5 Kh2 9. Qe5+
                             Kh1 10. Qe4 Kh2H (1885920)
 17/28      1.163  +2.17   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. Qf3 Kh2 8. Qf2 Kh1 9. Qe1+
                             g1=Q 10. Qxg1+ Kxg1 (2012878)
[17/28]     1.323  +2.17   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. Qf3 Kh2 8. Qf2 Kh1 9. Qe1+
                             g1=Q 10. Qxg1+ Kxg1 (2611980)
 18/30      1.375  +2.19   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. h4 Kh2 8. Qd6+ Kh1 9. Qd5
                             Kh2 10. Qe5+ Kh1 11. Qe4 h6H (2711119)
[18/30]     1.446  +2.19   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. h4 Kh2 8. Qd6+ Kh1 9. Qd5
                             Kh2 10. Qe5+ Kh1 11. Qe4 h6H (2848815)
 19/30      1.551  +2.17   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. h6 Kh1 8. Qf3H Kh2H 9.
                             Qf4+H Kh1H (3231382)
[19/30]     2.060  +2.17   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kg1 7. h6 Kh1 8. Qf3H Kh2H 9.
                             Qf4+H Kh1H (5298470)
 20/38      2.162  +2.77   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 h6 7. Kb1 Kh2 8. Qd6+ Kh1 9. Qxh6
                             g1=R+ 10. Qc1 Rxc1+ 11. Kxc1 Kg2 12. h6 Kxh3 13.
                             h7H (5544720)
[20/38]     2.254  +2.77   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 h6 7. Kb1 Kh2 8. Qd6+ Kh1 9. Qxh6
                             g1=R+ 10. Qc1 Rxc1+ 11. Kxc1 Kg2 12. h6 Kxh3 13.
                             h7H (5769256)
 21/38      2.382  +5.49   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 h6 7. Kb1 Kh2 8. Qd6+ Kxh3 9. Qd4
                             Kh2 10. Qh4+ Kg1 11. Ka1 Kf1 12. Qf4+ Ke1 13. Qd4
                             Kf1H 14. Qf4+H (6109091)
[21/38]     2.491  +5.49   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 h6 7. Kb1 Kh2 8. Qd6+ Kxh3 9. Qd4
                             Kh2 10. Qh4+ Kg1 11. Ka1 Kf1 12. Qf4+ Ke1 13. Qd4
                             Kf1H 14. Qf4+H (6410001)
 22/38      2.553  +5.49   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 h6 7. Kb1 Kh2 8. Qd6+ Kxh3 9. Qd4
                             Kh2 10. Qf4+ Kh1 11. Qh4+ Kg1 (6571769)
[22/38]     2.720  +5.49   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 h6 7. Kb1 Kh2 8. Qd6+ Kxh3 9. Qd4
                             Kh2 10. Qf4+ Kh1 11. Qh4+ Kg1 (7068421)
 23/38      2.793  +5.49   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 h6 7. Kb1 Kh2 8. Qd6+ Kxh3 9.
                             Qd3+ Kh2 10. Qe2 Kh1 11. Qf3 Kh2 12. Qf4+ Kh1 13.
                             Qe4 Kh2 14. Qh4+ Kg1 15. Qxb4 (7267225)
[23/38]     3.092  +5.49   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 h6 7. Kb1 Kh2 8. Qd6+ Kxh3 9.
                             Qd3+ Kh2 10. Qe2 Kh1 11. Qf3 Kh2 12. Qf4+ Kh1 13.
                             Qe4 Kh2 14. Qh4+ Kg1 15. Qxb4 (8166405)
 24/40      4.184  +6.16   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kf1 12. Qf4+ Ke1
                             13. Qe4+ Kf2 14. Qd4+ Kf1 15. Qc4+ Kg1 16. Qxb3
                             Kh2H (11662837)
[24/40]     4.599  +6.16   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kf1 12. Qf4+ Ke1
                             13. Qe4+ Kf2 14. Qd4+ Kf1 15. Qc4+ Kg1 16. Qxb3
                             Kh2H (13012670)
 25/40      5.068  +6.25   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf4+ Ke1
                             13. Qxb4+ Kf1 14. Qf4+ Kg1 15. Kc1 Kh1 16. Qh4+
                             Kg1 17. Kd2 Kf1H (14409627)
[25/40]     7.028  +6.25   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf4+ Ke1
                             13. Qxb4+ Kf1 14. Qf4+ Kg1 15. Kc1 Kh1 16. Qh4+
                             Kg1 17. Kd2 Kf1H (20548949)
 26/43      8.453  +7.00   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf4+ Ke1
                             13. Qxb4+H Kf1H 14. Qf4+H Kg1H (25499972)
[26/43]    10.343  +7.00   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf4+ Ke1
                             13. Qxb4+H Kf1H 14. Qf4+H Kg1H (31690947)
 27/43     11.139  +7.00   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf6+ Ke2
                             13. Qd4 Kf1 14. Qd1+ Kf2 15. Qd2+ Kg3 16. Qd4 Kh2
                             17. Qh4+ Kg1 18. Kc1 Kf1H 19. Qf6+H (34304968)
[27/43]    14.305  +7.00   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf6+ Ke2
                             13. Qd4 Kf1 14. Qd1+ Kf2 15. Qd2+ Kg3 16. Qd4 Kh2
                             17. Qh4+ Kg1 18. Kc1 Kf1H 19. Qf6+H (44658780)
 28/43     15.235  +7.00   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf6+ Ke1
                             13. Qd4 Kf1 14. Qf4+ Ke1 15. Qg3+ Kf1 16. Qf3+
                             Kg1 17. Kc1H (47748333)
[28/48]    20.822  +7.00   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf6+ Ke1
                             13. Qd4 Kf1 14. Qf4+ Ke1 15. Qg3+ Kf1 16. Qf3+
                             Kg1 17. Kc1H (65584234)
 29/48     27.616  +7.14   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kh1 12. Qh4+ Kg1
                             13. Qg3 Kf1 14. Qf3+ Kg1 15. Qxb3 Kh2 16. Qc2 Kh1
                             17. Qe4 Kh2 18. Qh4+ Kg1 19. Qd4+ Kh2H (89221240)
[29/49]    34.929  +7.14   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kh1 12. Qh4+ Kg1
                             13. Qg3 Kf1 14. Qf3+ Kg1 15. Qxb3 Kh2 16. Qc2 Kh1
                             17. Qe4 Kh2 18. Qh4+ Kg1 19. Qd4+ Kh2H (113765939)
 30/49     40.496  +7.14   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kf2 12. Qh4+ Kf1
                             13. Qh3 Kg1 14. Qxb3 Kh2 15. Qc2 Kh1 16. Qe4 Kg1
                             17. Qe1+ Kh2 18. Qf2 Kh1 19. Qh4+ Kg1 20. Qd4+
                             Kh2H (133985613)
[30/51]      1:05  +7.14   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kf2 12. Qh4+ Kf1
                             13. Qh3 Kg1 14. Qxb3 Kh2 15. Qc2 Kh1 16. Qe4 Kg1
                             17. Qe1+ Kh2 18. Qf2 Kh1 19. Qh4+ Kg1 20. Qd4+
                             Kh2H (212123200)
 31/51       1:18  +7.90   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kf1 12. Qf4+ Ke2
                             13. Qg3 Kf1 14. Qf3+ Kg1 15. Qxb3 Kh2 16. Qc2 Kh1
                             17. Qe4 Kg1 18. Qe1+ Kh2 19. Qf2 Kh1 20. Qh4+ Kg1
                             21. b4H (257005944)
[31/51]      1:42  +7.90   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kf1 12. Qf4+ Ke2
                             13. Qg3 Kf1 14. Qf3+ Kg1 15. Qxb3 Kh2 16. Qc2 Kh1
                             17. Qe4 Kg1 18. Qe1+ Kh2 19. Qf2 Kh1 20. Qh4+ Kg1
                             21. b4H (344529191)
 32/52       2:02  +8.04   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kf1 12. Qf4+ Ke2
                             13. Qg3 Kf1 14. Qf3+ Kg1 15. Qxb3 Kh2 16. Qc2 Kg1
                             17. Qc1+ Kh2 18. Qf4+ Kh1 19. Qe4 Kh2 20. Qh4+
                             Kg1 21. b4 (414931229)
[32/59]      3:43  +8.04   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kf1 12. Qf4+ Ke2
                             13. Qg3 Kf1 14. Qf3+ Kg1 15. Qxb3 Kh2 16. Qc2 Kg1
                             17. Qc1+ Kh2 18. Qf4+ Kh1 19. Qe4 Kh2 20. Qh4+
                             Kg1 21. b4 (781664571)
 33/59       4:19  +8.12   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kh1 12. Qh4+ Kg1
                             13. Qg3 Kf1 14. Qf3+ Kg1 15. Qxb3 Kh2 16. Qc2 Kh1
                             17. Qe4 Kh2 18. Qh4+ Kg1 19. Qe1+ Kh2 20. Qf2 h6
                             21. Qh4+ Kg1 22. b4 (910246849)
[33/60]     10:05  +8.12   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Qxb4 Kh1 12. Qh4+ Kg1
                             13. Qg3 Kf1 14. Qf3+ Kg1 15. Qxb3 Kh2 16. Qc2 Kh1
                             17. Qe4 Kh2 18. Qh4+ Kg1 19. Qe1+ Kh2 20. Qf2 h6
                             21. Qh4+ Kg1 22. b4 (2265176418)
 34/60      12:58 +10.20   1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5.
                             Qd6+ Kh1 6. Qc6 Kh2 7. Qc7+ Kxh3 8. Qc1 Kh2 9.
                             Qf4+ Kh1 10. Qh4+ Kg1 11. Kb1 Kf1 12. Qf4+ Ke2
                             13. Qg3 Kf1 14. Qd3+ Kf2 15. Qf5+ Kg3 16. Qc5 Kh2
                             17. Qf2 Kh3 18. Qg1 Kg3 19. Qe1+ Kg4 20. Qf2H
                             (2904036400)
Top
User avatar
Eelco de Groot
Posts: 4681
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test position

Post by Eelco de Groot »

That looks like a very good performance by ZCT Zach! Toga sees high scores for both 1. Qd2 and 1. Kc1 and only at ply 17 chooses 1. Ka1 when both the alternative moves have failed low. No matescores here.

[d]8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - -

Engine: Toga Checkov 1.4 Beta 4/Toga Mara Beta 6 Build 131 (Athlon 2009 MHz, 256 MB)
by Fabien Letouzey, Thomas Gaksch, Taban Juma, Eelco de Groot

8/24 0:00 +4.75 1.Qd2 Kh1 2.Qd5 Kh2 3.Qe5+ Kh1 4.Qe4 Kh2
5.Qf4+ Kh1 (156.704)

9/25 0:00 +4.49 1.Qd2 Kh1 2.Qd5 Kh2 3.Qe5+ Kh1 4.Qe4 Kh2
5.Qf4+ Kh1 6.Qf3 (178.141)

10/27 0:00 +4.50 1.Qd2 Kh1 2.Qd5 Kh2 3.Qe5+ Kh1 4.Qe4 Kh2
5.Qf4+ Kh1 6.Qf3 Kh2 (216.884)

11/28 0:00 +4.25 1.Qd2 Kh1 2.Qd5 Kh2 3.Qe5+ Kh1 4.Qe4 Kh2
5.Qf4+ Kh1 6.Qf3 Kh2 7.Qf2 (273.148)

12/30 0:00 +4.27 1.Qd2 Kh1 2.Qd5 Kg1 3.Qe4 Kh2 4.Qf4+ Kh1
5.Qf3 Kh2 6.Qe2 h6 7.h4 (426.919)

13/39 0:05 +4.48 1.Qd2 Kh1 2.Qd5 Kh2 3.Qe5+ Kh1 4.Qe4 Kh2
5.Qe2 Kh1 6.Qf3 Kh2 7.Qf2 h6 (5.370.486) 950

14/39 0:06 +0.27 1.Qd2 Kh1 2.Qd5 Kh2 3.Qe5+ Kh1 4.Qe4 Kh2
5.Qf4+ Kh1 6.Qf3 Kh2 7.Qxb3 g1Q+
8.Kc2 Qg2+ 9.Kd3 Qxh3+ 10.Kc4 Qg4+
11.Kb5 Qxh5+ 12.Kxb4 Qh4+ 13.Qc4 Qe1+
14.Kb3 (6.300.578) 966

14/39 0:10 +4.21 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qg7 Kh2 9.Qe5+ Kh1 10.Qe4 (10.213.258) 996

15/39 0:10 +4.20 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kh1
8.Qb7 Kh2 9.Qb8+ Kxh3 10.Qb6 Kh2
11.Qd6+ Kh3 12.Qe6+ Kh2 13.Qe5+ Kh3
14.Qe3+ (10.614.664) 998

16/39 0:10 +4.20 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kh1
8.Qb7 Kh2 9.Qb8+ Kxh3 10.Qb6 Kh2
11.Qd6+ Kh3 12.Qe6+ Kh2 13.Qe5+ Kh3
14.Qe3+ (10.958.436) 1001

17/44 1:42 +0.39 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kh1
8.Qb7 Kh2 9.Qb8+ Kh1 10.Qa8 Kh2
11.Qg8 g1Q+ 12.Qxg1+ Kxg1 13.Kd2 (108.334.777) 1060

17/47 2:44 +6.12 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh1 10.Qe4 Kh2
11.Qh4+ Kg1 12.h6 (169.624.581) 1029

18/47 2:45 +6.12 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh1 10.Qe4 Kh2
11.Qh4+ Kg1 12.h6 Kf1 13.Qc4+ Kf2
14.Qf4+ (170.573.421) 1029

19/47 2:47 +6.27 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.h4 (172.707.028) 1031

20/47 2:53 +6.76 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh3 10.Qf2 Kh2
11.Kb1 Kh1 (179.587.832) 1034

21/49 2:55 +6.76 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh1 10.Qe4 Kh2
11.Qh4+ Kg1 12.Qxb4 Kf2 13.Qd4+ Kf1
14.Qf4+ (181.840.649) 1034

22/49 3:02 +6.80 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh3 10.Qf2 Kh2
11.Kb1 Kh1 12.Qh4+ Kg1 13.Qxb4 Kf2
14.Qh4+ (189.493.308) 1036

23/52 3:15 +7.00 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh3 10.Qf2 Kh2
11.Qh4+ Kg1 12.Kb1 (203.011.316) 1039

24/55 3:50 +7.47 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh3 10.Qf2 Kh2
11.h6 Kh1 12.Qh4+ Kg1 13.Qxb4 Kf1
14.Qf4+ (232.308.168) 1007

25/56 4:12 +7.47 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh3 10.Qf2 Kh2
11.h6 Kh1 12.Qh4+ Kg1 13.Qxb4 Kf1
14.Qf4+ (251.145.155) 995

26/66 12:19 +12.76 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh3 10.Qf2 Kh2
11.Kb1 Kh1 12.Qh4+ Kg1 13.Kc1 (765.206.893) 1035

27/66 14:03 +12.76 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc1 Kh2 9.Qf4+ Kh3 10.Qf2 Kh2
11.Kb1 Kh1 12.Qh4+ Kg1 13.Qf4 Kh1
14.Qe4 (885.063.955) 1049

best move: Kb1-a1 time: 16:31.937 min n/s: 1.067.121 CPU 100.0% n/s(1CPU): 1.067.121 nodes: 1.055.750.000

Eelco
Top
User avatar
Eelco de Groot
Posts: 4681
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Mate in 29 moves! Re: Test position

Post by Eelco de Groot »

It is possible to get matescores for this BS2830-24 but only by taking the position a bit further out. I did not succeed with Build 132, that was supposed to have an improved version of the Single Reply extensions following Teemu's advice that in Build 131 I did not know whether the previous iteration already was extended, if so I only repeated the single reply move with the same depth. For some reason the new code fails and it is much slower :lol: I could blame this on the fact that just repeating the same depth helps with moveordering and is really a brilliant ploy, but the slowdown is of such astronomical proportions that I'm afraid I'm not getting away with that.

Teemu Pudas correctly commented on Rybka forum about Build 131:
----------------------------------
By Vempele Date 2008-11-17 17:04
> value = -full_search(board,-beta,-alpha,depth,height+1,new_pv,NodePV,cap_extended,ThreadId);

Note you're just wasting your time if the move was already extended the first time it was searched.

the point is that trains don't fall out of the sky
----------------------------------
My old code was:

Build 131.

Code: Select all


cut:

   ASSERT(value_is_ok(best_value));

   // [EdG: single reply extensions hack]
    
   if (best_move != MoveNone && nextbest_value != ValueNone && node_type == NodePV && best_value < beta && ((best_value - nextbest_value) >= (300 - 10 * depth)) && depth <= 30){// [EdG:[]'only move' hack]
	  move_do(board,best_move,undo);
	  value = -full_search(board,-beta,-alpha,depth,height+1,new_pv,NodePV,cap_extended,ThreadId);
	  //value = -full_search(board,-beta,-alpha,depth+1,height+1,new_pv,NodePV,cap_extended,ThreadId);
	  //value = -full_search(board,-beta,-alpha,depth+2,height+1,new_pv,NodePV,cap_extended,ThreadId);
	  move_undo(board,best_move,undo);
	  if (value >= best_value - (300 - 10 * depth)) { // Value may have dropped and we are out of the move-loop, don't update if drop too large. 
		 best_value = value;
		 pv_cat(pv,new_pv,best_move);

		 ASSERT(value_is_ok(best_value));

         if (value > alpha) {
            alpha = value;
         }
	  }
	  /*
	  if (old_alpha > value && nextbest_value > value) { // Part between /* */ skipped because I don't know how to debug this.

		 alpha = old_alpha;
		 best_move = nextbest_move;
		 best_value = nextbest_value;
		 pv_cat(pv,new_pv,nextbest_move);
	  }
	  */
   } // end of single reply extensions
And in the new version I tried placing the extensions before the beta cut-off flag and to keep track of the search-depth for best_move in depth_best_move.

Build 132

Code: Select all

   // ALL node

   if (best_value == ValueNone) { // no legal move
      if (in_check) {
         ASSERT(board_is_mate(board));
         return VALUE_MATE(height);
      } else {
         ASSERT(board_is_stalemate(board));
         return ValueDraw;
      }
   } 

   // [EdG: single reply extensions hack]
    
   if (best_move != MoveNone && nextbest_value != ValueNone && node_type == NodePV && best_value < beta && ((best_value - nextbest_value) >= (300 - 10 * depth)) && depth <= 30){// [EdG:[]'only move' hack]
	  move_do(board,best_move,undo);
	  value = -full_search(board,-beta,-alpha,depth_best_move + 1,height+1,new_pv,NodePV,cap_extended,ThreadId);
	  //value = -full_search(board,-beta,-alpha,depth_best_move + 2,height+1,new_pv,NodePV,cap_extended,ThreadId);
	  //value = -full_search(board,-beta,-alpha,depth_best_move + 3,height+1,new_pv,NodePV,cap_extended,ThreadId);
	  move_undo(board,best_move,undo);
	  if (value >= nextbest_value) {
		 best_value = value;
		 pv_cat(pv,new_pv,best_move);

		 ASSERT(value_is_ok(best_value));

         if (value > alpha) {
            alpha = value;
         }
	  }
	  /*
	  if (old_alpha > value && nextbest_value > value) {
		 alpha = old_alpha;
		 best_move = nextbest_move;
		 best_value = nextbest_value;
		 pv_cat(pv,new_pv,nextbest_move);
	  }
	  */
   } // end of single reply extensions

cut:
But it is much slower this way, although faster in finding 1. Ka1 which complicates things:

8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - -

Engine: Toga 1.4 Checkov Beta 4/Toga Mara Beta 6 Build 132 (Athlon 2009 MHz, 256 MB)
by Fabien Letouzey, Thomas Gaksch, Taban Juma, Eelco de Groot

9/25 0:00 +4.66 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 (254.864)

10/26 0:00 +4.68 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 (501.223)

11/30 0:00 +5.04 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kh1 (1.023.700)

12/33 0:02 +4.27 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qg7 Kh2 (2.261.517) 1080

13/36 0:03 +4.20 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qd7+ Kh2 9.Qd2 h6 10.Qd6+ Kh3
11.Qe6+ Kh2 12.Qe5+ Kh3 13.Qe3+ Kh2 (4.228.403) 1076

14/36 0:05 +4.73 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kh1
8.Qb7 Kh2 9.Qb8+ Kh1 (6.280.724) 1077

15/36 0:08 +4.44 1.Kc1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kh1
8.Qb7 Kh2 9.Qb8+ Kh1 10.Qa8 Kh2 (8.887.861) 1077

15/42 0:13 +5.12 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kg1 6.Qc6 Kf2 7.Qc5+ Kf1
8.Qc4+ Kg1 9.Qxb4 Kh2 10.Qf4+ Kh1
11.Qe4 (15.286.331) 1135

16/45 0:16 +5.13 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kg1 6.Qc5+ Kf1 7.Qc4+ Kg1
8.Qc1+ Kf2 9.Qf4+ Kg1 10.Qxb4 Kh2
11.Qf4+ Kh1 12.Qe4 Kh2 (18.816.863) 1122

17/45 0:21 +5.13 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc1+ Kf2
8.Qc5+ Kf1 9.Qc4+ Kg1 10.Qxb4 Kh2
11.Qf4+ Kh1 12.Qe4 Kh2 (23.610.580) 1122

18/50 0:29 +5.68 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc1+ Kf2
8.Qc5+ Kf1 9.Qf8+ Kg1 10.Qg7 Kh2
11.Qc7+ Kxh3 12.Qb6 Kg3 13.Kb1 (33.091.361) 1122

19/50 0:38 +5.79 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc1+ Kh2
8.Qc7+ Kxh3 9.Qa7 Kh2 10.Qf2 Kh1 (42.787.282) 1114

20/50 0:58 +6.52 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc5 Kh2 9.Qf2 Kh1 10.Qh4+ Kg1
11.Qxb4 h6 12.Qf4 Kh1 13.Qe4 Kh2
14.Qh4+ (64.095.483) 1098

21/59 1:22 +6.60 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc5 Kg3 9.Qg5+ Kf3 10.Kb1 h6
11.Qc5 Kg4 12.Qf2 Kh3 13.Kc1 Kh2
14.Qh4+ (90.280.458) 1100

22/59 2:26 +6.76 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc5 Kg3 9.Qg5+ Kf3 10.h6 Kf2
11.Qh4+ Kg1 12.Qxb4 Kh1 13.Qe4 Kh2
14.Qf4+ (158.842.444) 1083

23/59 10:09 +8.61 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc5 Kg3 9.Qg5+ Kf3 10.h6 Kf2
11.Qf5+ Kg3 12.Qe5+ Kh3 13.Qe3+ Kh2
14.Qf2 (709.897.042) 1164

24/60 23:41 +8.62 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc5 Kh2 9.Qf2 Kh1 10.Qh4+ Kg1
11.Kb1 Kf1 12.Qf4+ Ke2 13.Qg3 Kf1
14.Qf3+ (1.691.386.138) 1189

25/74 56:58 +10.62 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kh2 7.Qc7+ Kxh3
8.Qc5 Kh2 9.Qf2 Kh1 10.Qh4+ Kg1
11.Kb1 Kf1 12.Qf4+ Ke2 13.Qg3 Kf1
14.Qf3+ (4.087.616.326) 1195

26/74 127:37 +10.63 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qd7 h6 8.Kb1 Kh1
9.Qd5 Kh2 10.Qe5+ Kh1 11.Qe4 Kh2
12.Qe2 Kg3 13.Qe5+ Kf2 14.Qd4+ (9.240.988.597) 1206


After

[FEN "8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - -"]

1. Ka1 Kh1 2. Qe4 Kh2 3. Qe5+ Kh1 4. Qd5 Kh2 5. Qd6+ Kh1 *


[d]8/7p/3Q4/7P/1p6/1p5P/1P4p1/K6k w - -

Engine: Toga 1.4 Checkov Beta 4/Toga Mara Beta 6 Build 132 (Athlon 2009 MHz, 256 MB)
by Fabien Letouzey, Thomas Gaksch, Taban Juma, Eelco de Groot

11 0:38 +10.61 6.Qc6 Kg1 7.Qc1+ Kh2 8.Qc7+ Kxh3
9.Qc8+ Kg3 10.Qb8+ Kg4 11.Qxb4+ Kxh5 (48.125.026) 1242

11 0:39 0.00 6.Qd5 Kh2 (49.038.112) 1242

11 0:40 -1.22 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.Kb1 Kh2
9.h6 Kxh3 10.Kc1 Kg4 11.Kd2 Kg5
12.Kd3 Kxh6 13.Kc4 Kg5 14.Kxb4 (49.994.750) 1242

_____________________________________________________________________________

12 1:57 +10.61 6.Qc6 Kg1 7.Qd7 Kh2 8.Qc7+ Kxh3
9.Qc8+ Kg3 10.Qb8+ Kg4 11.Qxb4+ Kxh5 (147.815.400) 1255

12 1:58 0.00 6.Qd5 Kh2 (148.220.111) 1255

12 1:58 -1.48 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.Kb1 Kh2
9.Kc1 Kxh3 10.Kd2 Kg4 11.h6 Kg5
12.Ke3 Kxh6 13.Kf4 Kg6 14.Ke4 (148.726.896) 1255

______________________________________________________________________________

13 6:01 +10.61 6.Qc6 Kg1 7.Qd7 Kh2 8.Qc7+ Kxh3
9.Qc8+ Kg3 10.Qb8+ Kg4 11.Qxb4+ Kxh5 (455.936.139) 1262

13 6:01 0.00 6.Qd5 Kh2 (456.387.831) 1262

13 6:02 -1.97 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.Kb1 Kh2
9.Kc1 Kxh3 10.Kd2 Kg4 11.h6 Kg5
12.Ke3 Kxh6 13.Kf4 Kg6 14.Kg4 h5+
15.Kg3 (456.905.409) 1262

______________________________________________________________________________

14 14:25 +10.62 6.Qc6 Kg1 7.Qd7 Kh2 8.Qc7+ Kxh3
9.Qc5 Kg3 10.Qd6+ Kf3 11.Qd1+ Kg3
12.Qxb3+ Kg4 13.Qg8+ Kxh5 14.Kb1 b3
15.Qxg2 Kh4 16.Qe4+ Kg5 17.Qxh7 Kf4
18.Qh6+ Kf3 19.Qh3+ (1.128.068.780) 1302

14 14:25 0.00 6.Qd5 Kh2 (1.128.071.542) 1302

14 14:26 -1.40 6.Qd1+ g1Q 7.Qb1 Qxb1+ 8.Kxb1 Kg2
9.Kc1 Kxh3 10.h6 Kg4 11.Kd2 Kf4
12.Kd3 Kg5 13.Ke4 Kxh6 14.Kf5 Kh5
15.Kf4 Kg6 (1.128.671.751) 1302

______________________________________________________________________________

15 14:38 +10.63 6.Qc6 Kg1 7.Qd7 Kh2 8.Qc7+ Kxh3
9.Qa7 Kh2 10.Qf2 h6 11.Kb1 Kh1 (1.143.137.745) 1301

15 14:38 0.00 6.Qd5 Kh2 (1.143.140.571) 1301

15 14:38 -1.60 6.Qd1+ g1Q 7.Qb1 Qxb1+ 8.Kxb1 Kg2
9.Kc1 Kxh3 10.Kd2 Kg4 11.h6 Kf4
12.Kd3 Kg5 13.Ke4 Kxh6 14.Kf5 Kg7
15.Kg5 Kf7 16.Kf4 (1.143.539.214) 1301

______________________________________________________________________________

16 59:22 +10.63 6.Qc6 Kg1 7.Qc1+ Kh2 8.Qc7+ Kxh3 9.Qa7 Kh2 10.Qf2 h6 11.Kb1 Kh1 (4.656.867.494) 1307
16 59:22 0.00 6.Qd5 Kh2 (4.656.870.562) 1307
16 59:23 -2.43 6.Qd1+ g1Q 7.Qb1 Qxb1+ 8.Kxb1 Kg2 9.h6 Kxh3 10.Kc1 Kg4 11.Kd2 Kg5 12.Ke3 Kxh6 13.Kf4 Kg6 14.Kg3 h5

15.Kh4 Kh6 16.Kg3 Kg5 17.Kg2 (4.657.857.987) 1307

______________________________________________________________________________

16 59:22 +10.63 6.Qc6 Kg1 7.Qc1+ Kh2 8.Qc7+ Kxh3 9.Qa7 Kh2 10.Qf2 h6 11.Kb1 Kh1 (4.656.867.494) 1307
16 59:22 0.00 6.Qd5 Kh2 (4.656.870.562) 1307
16 59:23 -2.13 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.h6 Kg2 9.Kb1 Kxh3 10.Kc1 Kg4 11.Kd2 Kg5 12.Ke3 Kxh6 13.Kf4 Kg6 14.Kg4 h5+

15.Kf4 Kf6 16.Kg3 Ke5 (4.658.108.757) 1307

______________________________________________________________________________

17 64:32 +11.23 6.Qc6 Kg1 7.Qd7 h6 8.Kb1 Kh1 9.Qd5 Kh2 10.Qd2 Kh1 11.Qxh6 g1Q+ 12.Qc1 Qxc1+ 13.Kxc1 Kg2 14.h6 Kf3

15.Kd2 Kg3 16.h7 Kxh3 17.h8Q+ Kg2 18.Qg7+ Kh3 19.Qd7+ (5.042.236.655) 1302
17 64:32 0.00 6.Qd5 Kh2 (5.042.239.831) 1302
17 64:32 -2.43 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.Kb1 Kh2 9.h6 Kxh3 10.Kc1 Kg4 11.Kd2 Kg5 12.Ke3 Kxh6 13.Kf4 Kg6 14.Kg3 h5

15.Kh4 Kh6 16.Kg3 Kg5 17.Kg2 (5.042.797.977) 1302

______________________________________________________________________________

18 66:47 +11.47 6.Qc6 Kg1 7.Qd7 h6 8.Kb1 Kh1 9.Qd5 Kg1 10.Qd6 Kf2 11.Qd2+ Kg1 12.Qxh6 Kf2 13.Qd2+ Kg3 14.Qd6+ Kf2

15.Qd4+ Kf1 16.h6 g1Q 17.Qxg1+ Kxg1 18.h7 Kf1 19.h8Q (5.213.927.395) 1301
18 66:47 0.00 6.Qd5 Kh2 (5.213.930.650) 1301
18 66:48 -2.38 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.Kb1 Kh2 9.h4 Kg3 10.h6 Kxh4 11.Kc1 Kg4 12.Kd2 Kg5 13.Ke3 Kxh6 14.Kf4 Kg6

15.Ke3 h5 16.Kf4 Kh6 17.Kf3 Kg5 (5.214.479.734) 1301

______________________________________________________________________________

19 71:19 +10.71 6.Qc6 Kg1 7.Qd7 h6 8.Kb1 Kh1 9.Qd5 Kh2
10.Qd2 Kh1 11.Qxh6 g1Q+ 12.Qc1 Qxc1+
13.Kxc1 Kg1 14.Kd2 Kf2 15.h6 Kg3
16.h7 Kf4 17.h8Q Ke4 18.Qh7+ Kd5
19.Qd3+ (5.549.950.068) 1294

19 71:39 0.00 6.Qd5 Kh2 (5.572.592.057) 1294

19 72:02 -2.59 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.Kb1 Kh2
9.Kc1 Kxh3 10.Kd2 Kg4 11.h6 Kg5
12.Ke3 Kxh6 13.Kf4 Kg6 14.Ke3 h5
15.Kf4 Kf6 16.Kg3 Kg5 17.Kh2 Kg4
18.Kg2 (5.596.159.146) 1294

______________________________________________________________________________

20 101:11 +13.35 6.Qc6 Kg1 7.Qd7 h6 8.Kb1 Kh2 9.Qd2 Kg3
10.Qd6+ Kf2 11.Qd4+ Kf1 12.Qf4+ Ke2
13.Qc1 Kf3 14.Qe1 Kf4 15.Qf2+ Ke4
16.Qxg2+ Ke3 17.Kc1 Kf4 18.Qg4+ (7.713.115.157) 1270

20 101:11 0.00 6.Qd5 Kh2 (7.713.118.635) 1270

20 101:16 -2.46 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.h6 Kg2
9.h4 Kf3 10.Kb1 Kg4 11.Kc1 Kxh4
12.Kd2 Kg5 13.Ke3 Kxh6 14.Kf4 Kh5
15.Kg3 Kg5 16.Kf3 h6 17.Kf2 Kf4
18.Kg2 h5 19.Kh3 (7.717.656.697) 1270

_______________________________________________________________________________

21 239:12 +13.36 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1 9.Qc6 Kh2
10.Qd6+ Kxh3 11.Qd4 Kh2 12.Qf2 Kh1
13.Qh4+ Kg1 14.Qg3 Kh1 15.Qh3+ Kg1
16.Kc1 Kf2 17.Qh2 Kf3 18.Kd1 g1Q+
19.Qxg1 (17.025.015.762) 1186

21 239:12 0.00 6.Qd5 Kh2 (17.025.375.410) 1186

21 239:43 -3.18 6.Qb6 g1Q+ 7.Qxg1+ Kxg1 8.Kb1 Kh2
9.h4 Kg3 10.Kc1 Kxh4 11.h6 Kg5
12.Kd2 Kxh6 13.Kd3 Kg5 14.Ke3 Kg4
15.Ke2 Kg3 16.Kf1 h5 17.Kg1 h4
18.Kh1 Kh3 19.Kg1 (17.059.081.471) 1186


Now entering 6. Qc6

[d]8/7p/2Q5/7P/1p6/1p5P/1P4p1/K6k b - -

Engine: Toga 1.4 Checkov Beta 4/Toga Mara Beta 6 Build 132 (Athlon 2009 MHz, 256 MB)
by Fabien Letouzey, Thomas Gaksch, Taban Juma, Eelco de Groot

8 0:06 -10.13 6...Kg1 7.Qc1+ Kh2 8.Qc7+ Kxh3
9.Qd7+ Kg3 10.Qa7 h6 11.Qg7+ Kf4
12.Qxg2 Ke3 13.Kb1 Kd3 14.Qf3+ Kd2
15.Qf4+ Kd1 16.Qxb4 (8.537.163) 1295

8 0:10 -10.43 6...Kh2 7.Qc7+ Kxh3 8.Qc8+ Kg3
9.Qb8+ Kg4 10.Qxb4+ Kg3 11.Qd6+ Kg4
12.Qh2 h6 13.Qxg2+ Kxh5 14.Qg7 Kh4
15.Qxh6+ Kg3 16.Qg5+ Kf2 17.Qd2+ Kf3
18.Qd3+ Kf4 19.Qxb3 (13.763.631) 1295

8 0:10 -10.56 6...h6 7.Kb1 Kh2 8.Qd6+ Kh1 9.Qxh6 g1Q+
10.Qc1 Qxc1+ 11.Kxc1 Kh2 12.h6 Kxh3
13.h7 Kg4 14.Kd2 Kf4 15.Kd3 (14.113.190) 1295

_______________________________________________________________________________

9 0:21 -10.43 6...Kg1 7.Qc1+ Kh2 8.Qc7+ Kxh3
9.Qc8+ Kg3 10.Qb8+ Kg4 11.Qxb4+ Kg3
12.Qd6+ Kg4 13.Qh2 h6 14.Qxg2+ Kxh5
15.Qg7 Kh4 16.Qxh6+ Kg3 17.Qg5+ Kf2
18.Qd2+ Kf3 19.Qd3+ Kf4 (28.013.009) 1295

9 0:23 -10.63 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kg3 9.Qg5+ Kf3
10.Qf5+ Ke3 11.Qc5+ Kd3 12.Qf2 Kc4
13.Qxg2 Kd3 14.Qd5+ Ke3 15.Qxb3+ Kd4
16.Qxb4+ Ke5 (29.848.089) 1295

9 0:24 -11.55 6...h6 7.Kb1 Kh2 8.Qd6+ Kh1 9.Qxh6 g1Q+
10.Qc1 Qxc1+ 11.Kxc1 Kh2 12.h6 Kh1
13.h7 Kg2 14.h8Q Kf3 15.h4 Kf4 16.h5 Kg5 (31.108.983) 1295

_______________________________________________________________________________

10 1:27 -10.51 6...Kg1 7.Qc7 h6 8.Kb1 Kh1 9.Qc6 Kh2
10.Qd6+ Kh1 11.Qxh6 g1Q+ 12.Qc1 Qxc1+
13.Kxc1 Kh2 14.h6 Kxh3 15.h7 Kg4
16.Kd2 (108.561.714) 1240

10 2:07 -10.62 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 h6
10.Qh4+ Kg1 11.Qxb4 Kh2 12.Qh4+ Kg1
13.Kb1 Kf1 14.Qf4+ Ke2 15.Qg4+ Ke3
16.Qxg2 Kd3 17.Qf3+ Kd4 18.Qxb3 (157.980.528) 1240

10 2:08 -12.53 6...h6 7.Kb1 Kh2 8.Qd6+ Kh1 9.Qxh6 g1Q+
10.Qc1 Qxc1+ 11.Kxc1 Kh2 12.h6 Kg3
13.h7 Kf4 14.h8Q Kf5 15.h4 Kg4 16.h5 Kh4
17.h6 Kh5 (160.154.367) 1240

_______________________________________________________________________________


11 4:13 -10.62 6...Kg1 7.Qc5+ Kh2 8.Qc7+ Kxh3 9.Qa7 Kh2
10.Qf2 h6 11.Qh4+ Kg1 12.Qxb4 Kh2
13.Qh4+ Kg1 14.Kb1 Kf1 15.Qf4+ Ke2
16.Qg4+ Ke3 17.Qxg2 Kd3 18.Qf3+ Kd4
19.Qxb3 (318.104.512) 1266

11 4:22 -10.74 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 h6
10.Kb1 Kh3 11.Kc1 Kg4 12.Qxg2+ Kf4
13.Qg7 Kf5 14.Qxh6 Kg4 (330.294.587) 1266

11 4:50 -12.63 6...h6 7.Kb1 Kh2 8.Qc7+ Kh1 9.Qb7 Kh2
10.Qg7 Kxh3 11.Qd7+ (368.040.514) 1266

_______________________________________________________________________________

12 4:53 -11.17 6...Kg1 7.Qc7 h6 8.Kb1 Kh1 9.Qc6 Kh2
10.Qd6+ Kh1 11.Qxh6 g1Q+ 12.Qc1 Qxc1+
13.Kxc1 Kg1 14.h6 Kf2 15.Kd2 Kf3
16.h7 Ke4 (371.649.881) 1270

12 5:15 -12.19 6...Kh2 7.Qc7+ Kxh3 8.Qc5 Kg3 9.Qc1 h6
10.Qe1+ Kg4 11.Qe2+ Kg5 12.Qe3+ Kf5
13.Qf2+ Ke5 14.Qxg2 Ke6 15.Qg8+ Kf6
16.Qg6+ Ke5 17.Qxh6 Kf5 18.Qg6+ Ke5
19.Qg3+ Kf5 (397.487.895) 1270

12 5:39 -13.36 6...h6 7.Kb1 Kh2 8.Qc7+ Kh1 9.Qb7 Kh2
10.Qg7 Kxh3 11.Qd4 Kg3 12.Qd3+ Kh2 (431.106.444) 1270

_______________________________________________________________________________

13 5:43 -12.19 6...Kg1 7.Qc1+ Kh2 8.Qc7+ Kxh3 9.Qc1 Kg3
10.Qg5+ Kf3 11.Qg7 h6 12.Qa7 Kf4
13.Qf2+ Ke5 14.Qxg2 Ke6 15.Qg8+ Kf6
16.Qg6+ Ke5 17.Qxh6 Kf5 18.Qg6+ Ke5
19.Qg3+ Kf5 (435.713.787) 1188

13 8:34 -12.60 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 h6
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qf4+ Ke2
13.Qd4 Kf1 14.Qd1+ Kf2 15.Qd2+ Kf1
16.Qc1+ (652.028.928) 1188

13 22:21 -12.60 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qc5 Kh2
10.Qc7+ Kh1 11.Qc6 Kh2 12.Qd6+ Kg1
13.Qd4+ Kf1 14.Qd1+ Kf2 15.Qd2+ Kf1
16.Qc1+ (1.594.208.488) 1188

_______________________________________________________________________________

14 24:02 -12.60 6...Kg1 7.Qc1+ Kh2 8.Qc7+ Kxh3 9.Qa7 Kh2
10.Qf2 h6 11.Qh4+ Kg1 12.Kb1 Kf1
13.Qf4+ Ke2 14.Qd4 Kf1 15.Qd1+ Kf2
16.Qd2+ Kf1 17.Qc1+ (1.721.088.507) 1156

14 51:31 -12.62 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qc5 Kh2
10.Qf2 Kh1 11.Qh4+ Kg1 12.Kc1 Kf1
13.Qf4+ Ke2 14.Qd2+ Kf1 15.Kd1 (3.575.375.765) 1156

14 24:32 -12.64 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 h6
10.Qh4+ Kg1 11.Qg3 Kh1 12.Qh3+ Kg1
13.Qg4 Kf1 14.Qd1+ Kf2 15.Qd4+ Kf3
16.Qg1 Kf4 17.Qxg2 Ke3 18.Qg3+ Ke4
19.Qg2+ Kf5 (1.759.568.016) 1156

_______________________________________________________________________________

15 52:08 -12.64 6...Kg1 7.Qc1+ Kh2 8.Qc7+ Kxh3 9.Qa7 Kh2
10.Qf2 Kh1 11.Qh4+ Kg1 12.Kb1 Kf1
13.Qf4+ Ke2 14.Qg3 Kf1 15.Qd3+ (3.624.458.918) 1158

15 90:55 -15.39 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 h6
10.Kb1 Kh1 11.Qh4+ Kg1 12.Qg4 Kf1
13.Qf4+ Ke2 14.Qc4+ Kf3 15.Qxb3+ Kf4
16.Qxb4+ Kg3 17.Qd6+ Kg4 (6.320.840.240) 1158

15 88:22 -15.58 6...h6 7.Kb1 Kh2 8.Qc7+ Kh1 9.Qb7 Kh2
10.Qb8+ Kh1 11.Qa8 Kh2 12.Qg8 Kxh3
13.Qe6+ Kg3 14.Qe1+ Kh2 15.Qh4+ Kg1
16.Qf4 (6.127.320.712) 1158

_______________________________________________________________________________

16 102:56 -12.60 6...Kg1 7.Qc7 h6 8.Kb1 Kh1 9.Qb7 Kh2
10.Qb8+ Kh1 11.Qa8 Kh2 12.Qg8 Kxh3
13.Qe6+ Kg3 14.Qd6+ Kf2 15.Qd2+ Kf1
16.Qc1+ (7.216.182.034) 1167

16 109:42 -15.58 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 h6
10.Kb1 Kh1 11.Qh4+ Kg1 12.Kc1 Kf1
13.Qf4+ Ke2 14.Qg3 Kf1 15.Qf3+ Ke1
16.Qe3+ Kf1 17.Qd3+ (7.723.872.403) 1167

16 119:29 -15.80 6...h6 7.Kb1 Kh2 8.Qc7+ Kh1 9.Qb7 Kh2
10.Qb8+ Kh1 11.Qa8 Kh2 12.Qg8 Kxh3
13.Qe6+ Kg3 14.Qe1+ Kh2 15.Qf2 Kh3
16.Qe3+ (8.367.677.146) 1167

Although the PVs seem resonably accurate it can be seen that the branching factor is very low and there are no matescores.

Build 131 was much, much faster... It turns out to be a mate in (-)23 moves in this position after 6. Qc6:

[d]8/7p/2Q5/7P/1p6/1p5P/1P4p1/K6k b - -

Engine: Toga 1.4 Checkov Beta 4/Toga Mara Beta 6 Build 131 (Athlon 2009 MHz, 256 MB)
by Fabien Letouzey, Thomas Gaksch, Taban Juma, Eelco de Groot

14 0:02 -6.55 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qc4+ Kf2
13.Qd4+ Kf1 14.Qf4+ Ke2 15.Qg3 Kf1
16.Qf3+ Kg1 17.Qf4 Kh1 18.Qh4+ Kg1
19.Qxb4 (3.285.774) 1116

14 0:03 -6.87 6...Kg1 7.Qc7 Kf2 8.Qa7+ Kg3 9.Qg1 Kxh3
10.Kb1 Kg3 11.Kc1 Kf3 12.Kd2 Kg3
13.Qd4 Kh3 14.Ke2 (3.422.766) 1116

14 0:03 -10.00 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qf4+ Ke2
13.Qh2 Kf2 14.Kd2 Kf3 15.Qh3+ Ke4
16.Qxg2+ Kf4 17.Qf1+ Kg4 18.Qd1+ Kf4
19.Qxb3 (3.849.324) 1116

_______________________________________________________________________________

15 0:13 -6.76 6...Kh2 7.Qc7+ Kxh3 8.Qc5 (13.947.805) 1061

15 0:13 -8.97 6...Kg1 7.Qc7 Kf2 8.Qa7+ Kg3 9.Qg1 Kxh3
10.Kb1 Kg3 11.Kc1 Kf3 12.Kd2 Kg3
13.Ke2 Kg4 14.Qxg2+ Kxh5 15.Qg3 Kh6
16.Qxb3 (14.784.279) 1061

15 0:13 -10.00 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qf4+ Ke2
13.Qh2 Kf2 14.Kd2 Kf3 15.Qh3+ Ke4
16.Qxg2+ Kf5 17.Qd5+ Kf4 18.Qxb3 (14.897.595) 1061

_______________________________________________________________________________

16 0:15 -7.41 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Qxb4 Kh2 12.Qh4+ Kg1
13.Kb1 Kf1 14.Qf4+ Ke2 15.Qg3 Kf1
16.Qf3+ Kg1 17.Kc1 Kh2 18.Qf4+ Kh1
19.Qh4+ Kg1 (16.682.099) 1083

16 0:16 -9.35 6...Kg1 7.Qc7 Kf2 8.Qa7+ Kg3 9.Qg1 Kxh3
10.Kb1 Kg3 11.Kc1 Kf3 12.Kd2 Kg3
13.Ke2 Kh3 14.Kf3 Kh4 15.Qh2+ Kg5
16.Kxg2 Kh6 17.Qe5 (17.615.618) 1083

16 0:17 -10.68 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qf4+ Ke2
13.Qh2 Kf2 14.Kd2 Kf3 15.Qh3+ Ke4
16.Qxg2+ Ke5 17.Qg3+ Ke4 18.Qe3+ Kf5
19.Qxh6 (18.581.094) 1083

_______________________________________________________________________________

17 1:02 -10.67 6...Kg1 7.Qc1+ Kf2 8.Qc5+ Kf1 9.Qf8+ Kg1
10.Qf7 h6 11.Kb1 Kh1 12.Qd5 Kh2
13.Qd2 Kg3 14.Qe3+ Kh2 15.Qf4+ Kh1
16.Qxh6 g1Q+ 17.Qc1 Kh2 18.Qxg1+ Kxg1
19.h6 Kh2 (72.066.471) 1152

17 1:02 -10.70 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 Kh1
10.Qh4+ Kg1 11.Qxb4 Kh2 12.Qh4+ Kg1
13.Qg3 h6 14.Qxb3 Kh2 15.Qc2 Kh1
16.Qxg2+ Kxg2 17.b4 Kf2 18.b5 Kf3
19.b6 Ke4 (72.547.457) 1152

17 1:05 -12.82 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qf4+ Ke2
13.Qh2 Kf2 14.Kd2 Kf3 15.Kc1 (75.639.219) 1152

_______________________________________________________________________________

18 1:41 -10.90 6...Kg1 7.Qc7 h6 8.Kb1 Kh1 9.Qc6 Kh2
10.Qd6+ Kxh3 11.Qd4 Kh2 12.Qh4+ Kg1
13.Qg3 Kh1 14.Qh3+ Kg1 15.Kc1 Kf2
16.Qh2 Kf3 17.Kd2 g1Q 18.Qxg1 Ke4
19.Qg6+ Kf3 (118.428.154) 1175

18 1:45 -11.01 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 Kh1
10.Qh4+ Kg1 11.Qxb4 Kh2 12.Qh4+ Kg1
13.Qg3 h6 14.Qxb3 Kh2 15.Qc2 Kh1
16.Qxg2+ Kxg2 17.b3 (124.126.560) 1175

18 1:48 -15.98 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qf4+ Ke2
13.Qh2 Kf2 14.Kd2 Kf3 15.Qh3+ Ke4
16.Qxg2+ Kf4 17.Qg6 Ke5 18.Qxh6 Kf5
19.Qg6+ Ke5 (127.373.749) 1175

________________________________________________________________________________

19 2:12 -10.93 6...Kg1 7.Qd7 Kh2 8.Qc7+ Kxh3 9.Qa7 Kh2
10.Qf2 Kh1 11.Qh4+ Kg1 12.Qxb4 Kh2
13.Qh4+ Kg1 14.Qg3 h6 15.Qxb3 Kh2
16.Qc2 Kh1 17.Qxg2+ Kxg2 18.b4 Kf2
19.b5 Kf3 (156.981.702) 1178

19 2:20 -11.13 6...Kh2 7.Qc7+ Kxh3 8.Qa7 Kh2 9.Qf2 Kh1
10.Qh4+ Kg1 11.Qxb4 Kh2 12.Qh4+ Kg1
13.Qg3 h6 14.Qxb3 Kh2 15.Qc2 Kh1
16.Qxg2+ Kxg2 17.b4 Kf2 18.b5 Kf3
19.b6 Ke4 (165.498.130) 1178

19 2:29 -18.47 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qf4+ Ke2
13.Qh2 Kf2 14.Kd2 Kf3 15.Qh3+ Ke4
16.Qxg2+ Kf4 17.Qg6 Kf3 18.Qxh6 Kf2
19.Qg7 Kf3 (176.034.963) 1178

________________________________________________________________________________

20 2:39 -11.13 6...Kg1 7.Qd7 Kh2 8.Qc7+ Kxh3 9.Qa7 Kh2
10.Qf2 Kh1 11.Qh4+ Kg1 12.Qxb4 Kh2
13.Qh4+ Kg1 14.Qg3 h6 15.Qxb3 Kh2
16.Qc2 Kh1 17.Qxg2+ Kxg2 18.b4 Kf2
19.b5 Kf3 (187.582.542) 1161

20 3:18 -13.60 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qf4+ Ke2
13.Qg3 Kf1 14.Qf3+ Kg1 15.Qf4 Kh1
16.Qh4+ Kg1 17.Kc1 Kf1 18.Qf4+ Ke2
19.Qg3 Kf1 (234.108.977) 1161

20 3:56 -21.40 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qf4+ Ke2
13.Qh2 Kf2 14.Kd2 Kf3 15.Qh3+ Ke4
16.Qxg2+ Ke5 17.Qg7+ (274.292.484) 1161

________________________________________________________________________________

21 7:07 -13.53 6...Kg1 7.Qc1+ Kf2 8.Qc5+ Kf1 9.Qf8+ Kg1
10.Qe7 Kh2 11.Qc7+ Kxh3 12.Qc1 Kh2
13.Qf4+ Kh1 14.Qh4+ Kg1 15.Qxb4 Kh2
16.Qh4+ Kg1 17.Qg3 h6 18.Qe3+ (516.022.673) 1157

21 7:08 -13.60 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qf4+ Ke2
13.Qg3 Kf1 14.Qf3+ Kg1 15.Qf4 Kh1
16.Qh4+ Kg1 17.Kc1 Kf1 18.Qf4+ Ke2
19.Qg3 Kf1 (517.368.092) 1157

21 11:34 -41.14 6...h6 7.Kb1 Kh2 8.Qd6+ Kh1 9.Qxh6 g1Q+
10.Qc1 Qxc1+ 11.Kxc1 Kh2 12.h6 Kxh3
13.Kd2 Kg4 14.Kd3 Kf5 15.Kc4 Kf6
16.Kxb3 Ke5 17.Kxb4 (803.561.034) 1157

________________________________________________________________________________

22 14:22 -13.60 6...Kg1 7.Qc1+ Kf2 8.Qc5+ Kf1 9.Qf5+ Ke2
10.Qe6+ Kf2 11.Qb6+ Kf1 12.Qa6+ Kf2
13.Qa7+ Kg3 14.Qg1 Kxh3 15.Qf2 Kh2
16.Kb1 Kh1 17.Qh4+ Kg1 18.Kc1 Kf1
19.Qf4+ Ke2 (1.004.960.628) 1165

22 14:47 -18.60 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qf4+ Ke2
13.Qg3 Kf1 14.Qf3+ Kg1 15.Qf4 Kh1
16.Qh4+ Kg1 17.Kc1 Kf1 18.Qf4+ Ke2
19.Qe4+ (1.034.350.357) 1165

22 14:49 -41.14 6...h6 7.Kb1 Kh2 8.Qd6+ Kh1 9.Qxh6 g1Q+
10.Qc1 Qxc1+ 11.Kxc1 Kh2 12.h6 Kxh3
13.Kd2 Kg4 14.Kd3 Kf5 15.Kc4 Kf6
16.Kxb3 Ke5 17.Kxb4 (1.037.157.643) 1165

________________________________________________________________________________

23 15:48 -16.70 6...Kg1 7.Qc1+ Kf2 8.Qc5+ Kf1 9.Qf5+ Ke2
10.Qe6+ Kf2 11.Qb6+ Kf1 12.Qa6+ Kf2
13.Qa7+ Kf1 14.Qxh7 g1N 15.Qb1+ (1.110.863.162) 1075

23 16:12 -20.69 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qf4+ Ke2
13.Qg3 Kf1 14.Qf3+ Kg1 15.Qf5 Kh1
16.Qh3+ Kg1 17.Qf3 Kh1 18.Ka1 (1.138.943.764) 1075

23 44:47 -M18 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qh3 Kf2
13.Qh2 Ke1 14.Qg1+ Ke2 15.Qxg2+ Kd3
16.Qg6+ Kd4 17.Qxh6 Kd5 18.Qg6 Kc5
19.h6 Kd5 (2.891.001.184) 1075
________________________________________________________________________________

24 225:58 -20.70 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qf4+ Ke2
13.Qg3 Kf1 14.Qf3+ Kg1 15.Qf4 Kh1
16.Qh4+ Kg1 17.Ka1 (14.334.949.751) 1054

24 226:00 -M21 6...Kg1 7.Qc7 h6 8.Kb1 Kf2 9.Qf4+ Ke2
10.Qg3 Kf1 11.Qf3+ Kg1 12.Qf4 Kh1
13.Qxh6 g1Q+ 14.Qc1 Kh2 15.Qxg1+ Kxg1
16.h6 Kh2 17.h7 Kg3 18.h8Q Kf4
19.Qe8 Kf5 (14.336.832.269) 1054

24 238:06 -M17 6...h6 7.Kb1 Kh2 8.Qd6+ Kxh3 9.Qd4 Kh2
10.Qh4+ Kg1 11.Kc1 Kf1 12.Qh3 Kf2
13.Qh2 Ke3 14.Qxg2 Kd4 15.Qg7+ Kd5
16.Qxh6 Ke5 17.Qg6 Kd5 18.h6 Ke5
19.h7 Kd5 (15.068.006.468) 1054
________________________________________________________________________________

25 376:03 -M23 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qf4+ Ke2
13.Qg3 Kf1 14.Qf3+ Kg1 15.Qf4 Kh1
16.Qh4+ Kg1 17.Kc1 Kf1 18.Qf4+ Ke2
19.Qg3 g1Q+ (24.052.340.646) 1050

25 599:39 -M20 6...Kg1 7.Qc7 h6 8.Kb1 Kf1 9.Qf7+ Ke2
10.Qe6+ Kf2 11.Qb6+ Kf1 12.Qxh6 g1Q
13.Qc1+ Kg2 14.Qxg1+ Kxg1 15.h6 Kh2
16.h7 Kg3 17.h8Q Kf4 18.Qd4+ Kf5
19.h4 Ke6 (37.847.405.828) 1050

25 620:39 -M17 6...h6 7.Kb1 Kh2 8.Qd6+ Kh1 9.Qxh6 g1Q+
10.Qc1 Kh2 11.Qxg1+ Kxg1 12.h6 Kh2
13.h7 Kg3 14.h8Q Kf4 15.Qd4+ Kf5
16.h4 Ke6 17.h5 Kf5 18.Qd3+ Kf6
19.h6 Kf7 (39.114.921.616) 1050

___________________________________________________________________________

26 740:11 -M23 6...Kh2 7.Qc7+ Kxh3 8.Qc1 Kh2 9.Qf4+ Kh1
10.Qh4+ Kg1 11.Kb1 Kf1 12.Qf4+ Ke2
13.Qg3 Kf1 14.Qf3+ Kg1 15.Qf4 Kh1
16.Qh4+ Kg1 17.Kc1 Kf1 18.Qf4+ Ke2
19.Qg3 g1Q+ (46.488.262.320) 1035

26 1053:49-M20 6...Kg1 7.Qc7 h6 8.Kb1 Kf1 9.Qf7+ Ke2
10.Qe6+ Kf2 11.Qb6+ Kf1 12.Qxh6 g1Q
13.Qc1+ Kg2 14.Qxg1+ Kxg1 15.h6 Kh2
16.h7 Kg3 17.h8Q Kf4 18.Qd4+ Kf5
19.h4 Ke6 (65.547.792.348) 1035

26 1083:34-M17 6...h6 7.Kb1 Kh2 8.Qd6+ Kh1 9.Qxh6 g1Q+
10.Qc1 Kh2 11.Qxg1+ Kxg1 12.h6 Kf2
13.h7 Kf3 14.h8Q Ke4 15.Qe8+ Kd5
16.h4 Kd4 17.h5 Kc5 18.h6 Kd5 19.h7 Kc5 (67.329.818.150) 1035


It is not clear yet what I did wrong and why Build 131 is so much faster than the 'improved' 132.


Eelco
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
Top
User avatar
beachknight
Posts: 3533
Joined: Tue Jan 09, 2007 8:33 pm
Location: Antalya, Turkey

Re: Test position

Post by beachknight »

Code: Select all

30: 8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6, 
8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - - 0 1

Analysis by Deep Fritz 11:

1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2 5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kf1 9.Qf4+ Ke2 10.Qe4+ Kf1 11.Qf4+ 
  +-  (14.21)   Depth: 38/63   00:18:45  7871mN, tb=1119974

(, chessengines20 22.11.2008)
hi, merhaba, hallo HT
Top
User avatar
beachknight
Posts: 3533
Joined: Tue Jan 09, 2007 8:33 pm
Location: Antalya, Turkey

Re: Test position

Post by beachknight »

Code: Select all

30: 8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6, 
8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - - 0 1

Analysis by Rybka 3 Dynamic:

1.Ka1 
  +-  (6.58)   Depth: 21   00:04:18  150mN, tb=370

(, chessengines20 22.11.2008)
hi, merhaba, hallo HT
Top
User avatar
M ANSARI
Posts: 3733
Joined: Thu Mar 16, 2006 7:10 pm

Re: Test position

Post by M ANSARI »

Skulltrail 8 core @ 4 Ghz



New game, Blitz:80'
8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - - 0 1

Analysis by Rybka 3:

1.Ka1
+- (5.09) Depth: 6 00:00:00 0kN
1.Ka1
+- (5.09) Depth: 7 00:00:00 0kN
1.Ka1
+- (5.09) Depth: 8 00:00:00 0kN
1.Ka1
+- (5.09) Depth: 9 00:00:00 0kN
1.Ka1
+- (5.09) Depth: 10 00:00:00 0kN
1.Ka1
+- (5.09) Depth: 11 00:00:00 0kN
1.Ka1
+- (5.09) Depth: 12 00:00:00 0kN
1.Ka1
+- (5.09) Depth: 13 00:00:00 0kN
1.Ka1
+- (5.09) Depth: 14 00:00:00 15kN
1.Ka1
+- (6.31) Depth: 15 00:00:00 190kN
1.Ka1
+- (6.20) Depth: 16 00:00:00 473kN
1.Ka1
+- (7.71) Depth: 17 00:00:14 19721kN, tb=8
1.Ka1
+- (11.24) Depth: 18 00:04:43 418mN, tb=703

(, 22.11.2008)
Top
User avatar
Steve Maughan
Posts: 1299
Joined: Wed Mar 08, 2006 8:28 pm
Location: Florida, USA

Re: Test position

Post by Steve Maughan »

Glaunrung is good in these types of positions. It finds a mate score in just over 3 minutes from the original position


[d]8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - -

Engine: Glaurung 2.1 (JA) (1024 MB, 2.2 GHz Core 2 Duo)
by Tord Romstad

29.01 0:13 +8.78 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Qxb4 Kf2 14.Qd4+ (41.060.496) 3079

30.01 0:24 +11.82 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Kc1 Kf1 14.Qh3 (77.717.337) 3188

31.01 0:29 +12.45 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Kc1 Kf1 14.Qh3 (96.326.525) 3238

32.01 0:41 +12.49 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Kc1 Kf1 14.Qh3 (135.471.446) 3262

33.01 1:00 +18.64 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Kc1 Kf1 14.Qf4+ (199.233.809) 3275

34.01 1:10 +19.27 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Kc1 Kf1 14.Qf4+ (233.759.494) 3300

35.01 1:43 +19.82 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Kc1 Kf1 14.Qf4+ (336.910.251) 3264

36.01 3:05 +87.87 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Qf4 Kh1 14.Qxh6 (597.082.288) 3216

37.01 3:56 +87.92 1.Ka1 Kh1 2.Qe4 Kh2 3.Qe5+ Kh1 4.Qd5 Kh2
5.Qd6+ Kh1 6.Qc6 Kg1 7.Qc7 h6 8.Kb1 Kh1
9.Qc6 Kh2 10.Qd6+ Kxh3 11.Qd4 Kh2
12.Qh4+ Kg1 13.Qf4 Kh1 14.Qxh6 (755.477.547) 3199
Top
zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test position

Post by zullil »

kgburcham wrote:BS2830-24
[d] 8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - - bm Ka1
Crafty-22.4 succeeds:

Code: Select all

Procyon: ~/Documents/Chess/Crafty/Crafty-22.4] ./crafty-22.4 
max threads set to 2
EGTB access enabled
using tbpath=/Users/Louis/Documents/Chess/Crafty/TB
4 piece tablebase files found
1386kb of RAM used for TB indices and decompression tables
EGTB cache memory =   64M bytes.
hash table memory =  768M bytes.
pawn hash table memory =  256M bytes.
choose from book moves randomly (using weights.)
choose from 5 best moves.
don't display PV each time it changes.
don't display PV at end of each iteration.
don't display statistics at end of each search.
don't display extended statistics at end of each search.
don't display move numbers in variations.
don't display ply-1 moves as they are searched.
pondering enabled.
Audio output enabled
 game/10 minutes primary time control


Crafty v22.4 (2 cpus)

White(1): setboard 8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - - 
White(1): display changes
display PV each time it changes.
White(1): display variation
display PV at end of each iteration.
White(1): st=600
search time set to 600.00.
White(1): book off
book file disabled.
White(1): ponder off
pondering disabled.
White(1): go
              time limit 10:00 (+0.00) (10:00)
              depth   time  score   variation (1)
starting thread 1
               10->   0.05   6.63   h4 Kg3 Qe3+ Kh2 Qf4+ Kh1 Qe4 Kh2 Qe5+
                                    Kh3 Qg5 h6 Qg6 (s=4)
               11     0.06   6.63   h4 Kg3 Qe3+ Kh2 Qf4+ Kh1 Qe4 Kh2 Qe5+
                                    Kh3 Qg5 h6 Qg6 Kh2 Qd6+ Kh1 (s=3)
               11->   0.09   6.63   h4 Kg3 Qe3+ Kh2 Qf4+ Kh1 Qe4 Kh2 Qe5+
                                    Kh3 Qg5 h6 Qg6 Kh2 Qd6+ Kh1 (s=3)
               12     0.11   6.62   h4 Kg3 Qe3+ Kh2 Qf4+ Kh1 Qe4 Kh2 Qe5+
                                    Kh1 Qd5 Kh2 Qd6+ Kh3 Qd7+ Kh2 Qc7+
                                    Kh1 (s=2)
               12->   0.13   6.62   h4 Kg3 Qe3+ Kh2 Qf4+ Kh1 Qe4 Kh2 Qe5+
                                    Kh1 Qd5 Kh2 Qd6+ Kh3 Qd7+ Kh2 Qc7+
                                    Kh1 (s=5)
               13     0.14   6.54   h4 Kg3 Qe3+ Kh2 Qf4+ Kh1 Qe4 Kh2 Qe5+
                                    Kh1 Qd5 Kh2 Qd2 Kg3 Qd6+ Kh3 Qd4 Kh2
                                    Qf4+ <HT> (s=4)
               13     0.19   6.55   Qe5+ Kh1 Qd5 Kh2 Qd2 <HT>
               13->   0.19   6.55   Qe5+ Kh1 Qd5 Kh2 Qd2 <HT> (s=4)
               14     0.21     -1   Qe5+
               14     0.24     -3   Qe5+
               14     0.27     -M   Qe5+
               14     1.90   0.11   Qe5+ Kh1 Qd5 Kh2 Qxb3 g1=Q+ Kc2 Qg2+
                                    Kd3 Qxh3+ Kc4 Qg4+ Kc5 Qxh5+ Kxb4 Qg4+
                                    Kc5 Qf5+ Kd4 Qf4+ Kd3 h5 Qd5 <HT> (s=3)
               14     1.95   5.95   Kc1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh1 Qc6 Kh2 Qc7+ Kxh3 Qb6 Kh2 Qd6+
                                    Kh1 (s=2)
               14     1.96   6.43   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kh2 Qc7+ Kh1 Qb7 Kh2 Qb8+
                                    Kh1 Qa8
               14->   2.05   6.43   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kh2 Qc7+ Kh1 Qb7 Kh2 Qb8+
                                    Kh1 Qa8 (s=5)
               15     2.07   6.56   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kg3 Qc7+ Kf2 Qf7+ Ke1 Qe6+
                                    Kf2 Qb6+ Kf1 Qb5+ Kf2 Qc5+ <HT> (s=4)
               15->   2.11   6.56   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kg3 Qc7+ Kf2 Qf7+ Ke1 Qe6+
                                    Kf2 Qb6+ Kf1 Qb5+ Kf2 Qc5+ <HT> (s=3)
               16     2.14   6.56   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kg3 Qc7+ Kf2 Qf7+ Ke1 Qe6+
                                    Kf2 Qb6+ Kf1 Qb5+ Kf2 Qc5+ <HT> (s=2)
               16->   2.26   6.56   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kg3 Qc7+ Kf2 Qf7+ Ke1 Qe6+
                                    Kf2 Qb6+ Kf1 Qb5+ Kf2 Qc5+ <HT> (s=5)
               17     2.37   6.47   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kg3 Qc7+ Kh3 Qc1 Kh2 Qd2 Kg3
                                    Qd4 Kh2 Qf2 (s=4)
               17->   2.64   6.47   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kg3 Qc7+ Kh3 Qc1 Kh2 Qd2 Kg3
                                    Qd4 Kh2 Qf2 (s=4)
               18     2.81     -1   h4
               18     2.94     -3   h4
               18     3.28     -M   h4
               18     4.21   0.53   h4 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh3 Qd7+ Kg3 Qc7+ Kh3 Qa7 Kh2 Qf2 <HT>
                                    (s=3)
               18    12.63   6.46   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh1 Qc6 h6 h4 <HT>
               18->  12.63   6.46   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh1 Qc6 h6 h4 <HT> (s=5)
               19    12.80     +1   Ka1!!
               19    13.00     +3   Ka1!!
               19    13.16   7.51   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kg1 Qf7
                                    h6 Kb1 Kh1 Qd5 Kg1 Qc5+ Kf1 Qf8+ Ke2
                                    Qg7 Kf2 Qd4+ Kf1 Qc4+ Kg1 <HT> (s=4)
               19->  13.65   7.51   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kg1 Qf7
                                    h6 Kb1 Kh1 Qd5 Kg1 Qc5+ Kf1 Qf8+ Ke2
                                    Qg7 Kf2 Qd4+ Kf1 Qc4+ Kg1 <HT> (s=5)
               20    13.80     +1   Ka1!!
               20    14.07     +3   Ka1!!
               20    14.87   7.59   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kh1 Qc6 Kg1 Qc1+ Kf2 <HT>
                                    (s=4)
               20->  16.37   7.59   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kh1 Qc6 Kg1 Qc1+ Kf2 <HT>
                                    (s=3)
               21    16.49     +1   Ka1!!
               21    16.70   8.98   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kf1 Qf6+ Kg1 Qg7 Kh2 Qc7+
                                    Kxh3 Qg7 h6 Kb1 Kh2 Qe5+ <HT> (s=2)
               21->  19.95   8.98   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kf1 Qf6+ Kg1 Qg7 Kh2 Qc7+
                                    Kxh3 Qg7 h6 Kb1 Kh2 Qe5+ <HT> (s=5)
               22    20.30   8.98   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kf1 Qf6+ Kg1 Qd6 Kh1 Qc6 Kg1
                                    Qd7 Kf2 Qa7+ <HT> (s=4)
               22->  27.07   8.98   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kf1 Qf6+ Kg1 Qd6 Kh1 Qc6 Kg1
                                    Qd7 Kf2 Qa7+ <HT> (s=5)
               23    27.58   8.98   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kf1 Qf6+ Kg1 Qd6 Kh1 Qc6 Kg1
                                    Qd7 Kf2 Qa7+ <HT> (s=4)
               23->  41.68   8.98   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kf1 Qf6+ Kg1 Qd6 Kh1 Qc6 Kg1
                                    Qd7 Kf2 Qa7+ <HT> (s=5)
               24    42.75   8.98   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kf1 Qf6+ Kg1 Qd6 Kh1 Qc6 Kg1
                                    Qd7 Kf2 Qa7+ <HT> (s=4)
               24->   1:11   8.98   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qb6+ Kf1 Qf6+ Kg1 Qd6 Kh1 Qc6 Kg1
                                    Qd7 Kf2 Qa7+ <HT> (s=5)
               25     1:14     +1   Ka1!!
               25     1:21     +3   Ka1!!
               25     1:30  10.35   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh1 Qc6 h6 Kb1 Kh2 Qd6+ Kh1 Qxh6 g1=Q+
                                    Qc1 Qxc1+ Kxc1 Kg2 Kd2 Kxh3 h6 Kg2
                                    h7 Kf2 h8=Q Kf3 Qh3+ Ke4 Qxb3 (s=4)
               25->   2:21  10.35   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kh1 Qc6 h6 Kb1 Kh2 Qd6+ Kh1 Qxh6 g1=Q+
                                    Qc1 Qxc1+ Kxc1 Kg2 Kd2 Kxh3 h6 Kg2
                                    h7 Kf2 h8=Q Kf3 Qh3+ Ke4 Qxb3 (s=5)
               26     2:27     +1   Ka1!!
               26     2:36     +3   Ka1!!
               26     5:51  10.97   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qc7 h6 Kb1 Kh1 Qc6 Kh2 Qd6+ Kh1
                                    Qd5 Kg1 Qd4+ Kh1 Qe4 Kg1 Qe3+ Kf1 Qxh6
                                    g1=Q Qc1+ Kf2 Qxg1+ Kxg1 Kc1 <HT> (s=4)
               26->   8:12  10.97   Ka1 Kh1 Qe4 Kh2 Qe5+ Kh1 Qd5 Kh2 Qd6+
                                    Kg1 Qc7 h6 Kb1 Kh1 Qc6 Kh2 Qd6+ Kh1
                                    Qd5 Kg1 Qd4+ Kh1 Qe4 Kg1 Qe3+ Kf1 Qxh6
                                    g1=Q Qc1+ Kf2 Qxg1+ Kxg1 Kc1 <HT> (s=2)
               27     8:28     +1   Ka1!!
               27     8:32     +3   Ka1!!
               27     9:17     +M   Ka1!!
terminating SMP processes.
White(1): Ka1 
              time used:  10:00
Top
User avatar
michiguel
Posts: 6401
Joined: Thu Mar 09, 2006 8:30 pm
Location: Chicago, Illinois, USA

Re: Test position

Post by michiguel »

kgburcham wrote:BS2830-24
[d] 8/7p/8/7P/1p6/1p5P/1P2Q1pk/1K6 w - - bm Ka1
Beautiful. Absolutely beautiful.

Miguel
Top

Return to “Computer Chess Club: General Topics”