Mate in 15

rightrook · Post by **rightrook** » Tue Apr 06, 2010 7:22 pm

This is an interesting end game study!

[D]8/7Q/6p1/7p/6qk/8/7K/8 w - - 0 1

See how fast your engine can ann. a mate here....

kgburcham · Post by **kgburcham** » Tue Apr 06, 2010 7:35 pm

[D] 8/7Q/6p1/7p/6qk/8/7K/8 w - -

Deep Fritz 11:

1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qf3 4.Qxf3 Kg5 5.Kg3 h4+ 6.Kh3 Kh6 7.Kxh4 Kg7 8.Qc3+
+- (10.37) Depth: 11/19 00:00:00 113kN
1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qh3+ 4.Qxh3+ Kg5 5.Qe6 Kh6 6.Qe7 h4 7.Qxh4+ Kg7 8.Qf4 Kg8 9.Kg3 Kh7
+- (10.48) Depth: 12/25 00:00:00 223kN
1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qh3+ 4.Qxh3+ Kg5 5.Qe6 Kh6 6.Qe7 h4 7.Qxh4+ Kg7 8.Qf4 Kg8 9.Kg3 Kh7
+- (10.62) Depth: 13/27 00:00:00 289kN
1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qh3+ 4.Qxh3+ Kg5 5.Qf3 Kh6 6.Qf8+ Kh7 7.Qf7+ Kh6 8.Qe7 g5 9.Qf6+ Kh7 10.Qxg5 Kh8 11.Qg6 h4 12.Qg5 h3 13.Kxh3 Kh7 14.Kg4 Kh8
+- (11.64) Depth: 14/30 00:00:00 893kN
1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qh3+ 4.Qxh3+ Kg5 5.Qf3 Kh6 6.Qf8+ Kh7 7.Qf7+ Kh6 8.Qe7 g5 9.Qf6+ Kh7 10.Qxg5 Kh8 11.Qg6 h4 12.Qg5 h3 13.Kxh3 Kh7 14.Kg4 Kh8
+- (11.64) Depth: 15/33 00:00:00 1159kN
1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qh3+ 4.Qxh3+ Kg5 5.Qf3 Kh6 6.Qf8+ Kh7 7.Qf7+ Kh6 8.Qe7 g5 9.Qf6+ Kh7 10.Qxg5 Kh8 11.Qg6 h4 12.Qg5 h3 13.Kxh3 Kh7 14.Kg4 Kh8
+- (12.09) Depth: 16/33 00:00:00 1663kN
1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qh3+ 4.Qxh3+ Kg5 5.Qf3 Kh6 6.Qf8+ Kh7 7.Qf7+ Kh6 8.Qe7 g5 9.Qf6+ Kh7 10.Qxg5 Kh8 11.Qg6 h4 12.Qg5 h3 13.Kxh3 Kh7 14.Kg4 Kh8 15.Qe7
+- (12.09) Depth: 17/33 00:00:00 2847kN
1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qg2+ 4.Kxg2 Kg4 5.Qf3+ Kg5 6.Kh2 Kh6 7.Qf7 Kg5 8.Kg3 h4+ 9.Kh3 Kh5 10.Qf6 g5 11.Qf5 Kh6 12.Qf7 g4+ 13.Kxg4 h3 14.Kf5 h2 15.Qg6#
+- (#15) Depth: 18/33 00:00:00 5074kN
1.Qe7+ Qg5 2.Qe4+ Qg4 3.Qe3 Qg2+ 4.Kxg2 Kg4 5.Qf3+ Kg5 6.Kh2 Kh6 7.Qf7 Kg5 8.Kg3 h4+ 9.Kh3 Kh5 10.Qf6 g5 11.Qf5 Kh6 12.Qf7 g4+ 13.Kxg4 h3 14.Kf5 h2 15.Qg6#
+- (#15) Depth: 18/33 00:00:00 5074kN

CPU0: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4025 MHz
CPU1: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4025 MHz
CPU2: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4025 MHz
CPU3: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4025 MHz
CPU4: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4025 MHz
CPU5: GenuineIntel Intel64 Family 6 Model 44 Stepping 0 4025 MHz

Rybka 3
9.00 0:06 +10.48 1.Qe7+ (11.384.030) 1925
10.00 0:07 +10.95 1.Qe7+ (14.509.132) 1931
11.00 0:11 +11.00 1.Qe7+ (21.505.460) 1938
12.01 0:14 +M15 1.Qe7+ (26.942.836) 1907
13.01 0:19 +M15 1.Qe7+ (34.649.092) 1809

zullil · Post by **zullil** » Tue Apr 06, 2010 7:47 pm

rightrook wrote:This is an interesting end game study!

[D]8/7Q/6p1/7p/6qk/8/7K/8 w - - 0 1

See how fast your engine can ann. a mate here....

Crafty says Mate in 12:

Code: Select all

Crafty v23.2 &#40;8 cpus&#41;

White&#40;1&#41;&#58; egtb off
White&#40;1&#41;&#58; setboard 8/7Q/6p1/7p/6qk/8/7K/8 w - - 0 1
White&#40;1&#41;&#58; st 300 
search time set to 300.00.
White&#40;1&#41;&#58; display stats
display statistics at end of each search.
White&#40;1&#41;&#58; display

       +---+---+---+---+---+---+---+---+
    8  |   | . |   | . |   | . |   | . |
       +---+---+---+---+---+---+---+---+
    7  | . |   | . |   | . |   | . |-Q-|
       +---+---+---+---+---+---+---+---+
    6  |   | . |   | . |   | . |<P>| . |
       +---+---+---+---+---+---+---+---+
    5  | . |   | . |   | . |   | . |<P>|
       +---+---+---+---+---+---+---+---+
    4  |   | . |   | . |   | . |<Q>|<K>|
       +---+---+---+---+---+---+---+---+
    3  | . |   | . |   | . |   | . |   |
       +---+---+---+---+---+---+---+---+
    2  |   | . |   | . |   | . |   |-K-|
       +---+---+---+---+---+---+---+---+
    1  | . |   | . |   | . |   | . |   |
       +---+---+---+---+---+---+---+---+
         a   b   c   d   e   f   g   h

White&#40;1&#41;&#58; go
              time limit 5&#58;00 (+0.00&#41; &#40;5&#58;00&#41;
              depth   time  score   variation &#40;1&#41;
starting thread 1
starting thread 2
starting thread 3
starting thread 4
starting thread 5
starting thread 6
starting thread 7
               11     0.05  10.32   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qe6+ Kg5 6. Kh2 h4 7.
                                    Kh3 Kf4 8. Qf6+ Ke3 9. Qe5+ Kf3 10.
                                    Kxh4
               11->   0.05  10.32   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qe6+ Kg5 6. Kh2 h4 7.
                                    Kh3 Kf4 8. Qf6+ Ke3 9. Qe5+ Kf3 10.
                                    Kxh4
               12     0.08  10.65   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qe5 h4 6. Qe4+ Kg5 7.
                                    Kh3 Kf6 8. Qf4+ Ke6 9. Kxh4
               12->   0.09  10.65   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qe5 h4 6. Qe4+ Kg5 7.
                                    Kh3 Kf6 8. Qf4+ Ke6 9. Kxh4
               13     0.13  10.95   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qe5 h4 6. Qe4+ Kg5 7.
                                    Kh3 Kf6 8. Kxh4 Kf7 9. Qd5+ Kf6 10.
                                    Qg5+ Kf7
               13->   0.14  10.95   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qe5 h4 6. Qe4+ Kg5 7.
                                    Kh3 Kf6 8. Kxh4 Kf7 9. Qd5+ Kf6 10.
                                    Qg5+ Kf7
               14     0.22  10.99   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qe5 h4 6. Qe4+ Kg5 7.
                                    Kh3 Kf6 8. Qf4+ Ke6 9. Kxh4 Ke7 10.
                                    Qe5+ Kf7
               14->   0.23  10.99   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qe5 h4 6. Qe4+ Kg5 7.
                                    Kh3 Kf6 8. Qf4+ Ke6 9. Kxh4 Ke7 10.
                                    Qe5+ Kf7
               15     0.23     +1   1. Qe7+!                          
               15     0.23     +3   1. Qe7+!                          
               15     0.52  13.28   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf7 g5 7.
                                    Kh3 g4+ 8. Kh4 g3 9. Qf6+ Kh7 10. Kxh5
                                    Kg8 11. Qg6+ Kf8 <HT>
               15->   0.53  13.28   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf7 g5 7.
                                    Kh3 g4+ 8. Kh4 g3 9. Qf6+ Kh7 10. Kxh5
                                    Kg8 11. Qg6+ Kf8 <HT>
               16     0.65  13.28   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf7 g5 7.
                                    Kh3 g4+ 8. Kh4 g3 9. Qf6+ Kh7 10. Kxh5
                                    Kg8 11. Qg6+ Kf8 12. Qxg3 <HT>
               16->   0.66  13.28   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf7 g5 7.
                                    Kh3 g4+ 8. Kh4 g3 9. Qf6+ Kh7 10. Kxh5
                                    Kg8 11. Qg6+ Kf8 12. Qxg3 <HT>
               17     0.92  13.54   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf8+ Kh7
                                    7. Kh3 g5 8. Qf7+ Kh6 9. Qf6+ Kh7 10.
                                    Qxg5 h4 11. Kxh4 Kh8 12. Qh6+ Kg8
               17->   0.93  13.54   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf8+ Kh7
                                    7. Kh3 g5 8. Qf7+ Kh6 9. Qf6+ Kh7 10.
                                    Qxg5 h4 11. Kxh4 Kh8 12. Qh6+ Kg8
               18     1.42  13.54   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf8+ Kh7
                                    7. Qf7+ Kh8 8. Qxg6 h4 9. Qf7 h3 10.
                                    Qe7 Kg8 11. Kxh3 Kh8 12. Qf8+ Kh7
               18->   1.45  13.54   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf8+ Kh7
                                    7. Qf7+ Kh8 8. Qxg6 h4 9. Qf7 h3 10.
                                    Qe7 Kg8 11. Kxh3 Kh8 12. Qf8+ Kh7
               19     2.18  13.64   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf8+ Kh7
                                    7. Qf7+ Kh8 8. Qxg6 h4 9. Qf7 h3 10.
                                    Qf8+ Kh7 11. Kxh3 Kg6 12. Kh4 Kh7 13.
                                    Qf7+ Kh6 14. Qf6+ Kh7
               19->   2.21  13.64   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qe2+
                                    4. Qxe2 Kg5 5. Qf3 Kh6 6. Qf8+ Kh7
                                    7. Qf7+ Kh8 8. Qxg6 h4 9. Qf7 h3 10.
                                    Qf8+ Kh7 11. Kxh3 Kg6 12. Kh4 Kh7 13.
                                    Qf7+ Kh6 14. Qf6+ Kh7
               20     2.31     +1   1. Qe7+!                          
               20     2.31     +3   1. Qe7+!                          
               20     2.31     +M   1. Qe7+!                          
               20     6.00  Mat12   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qf3+ Kg5 6. Kg3 h4+
                                    7. Kh3 Kh6 8. Kg4 Kg7 9. Kg5 Kh7 10.
                                    Qf7+ Kh8 11. Kxg6 h3 12. Qf8#
               20->   6.20  Mat12   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qf3+ Kg5 6. Kg3 h4+
                                    7. Kh3 Kh6 8. Kg4 Kg7 9. Kg5 Kh7 10.
                                    Qf7+ Kh8 11. Kxg6 h3 12. Qf8#
               21     9.67  Mat12   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qf3+ Kg5 6. Kg3 h4+
                                    7. Kh3 Kh6 8. Kg4 Kg7 9. Kg5 Kh7 10.
                                    Qf7+ Kh8 11. Kxg6 h3 12. Qf8#
               21->  10.09  Mat12   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qf3+ Kg5 6. Kg3 h4+
                                    7. Kh3 Kh6 8. Kg4 Kg7 9. Kg5 Kh7 10.
                                    Qf7+ Kh8 11. Kxg6 h3 12. Qf8#
               22    15.56  Mat12   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qf3+ Kg5 6. Kg3 h4+
                                    7. Kh3 Kh6 8. Kg4 Kg7 9. Kg5 Kh7 10.
                                    Qf7+ Kh8 11. Kxg6 h3 12. Qf8#
               22->  16.21  Mat12   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qf3+ Kg5 6. Kg3 h4+
                                    7. Kh3 Kh6 8. Kg4 Kg7 9. Kg5 Kh7 10.
                                    Qf7+ Kh8 11. Kxg6 h3 12. Qf8#
               23    25.21  Mat12   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qf3+ Kg5 6. Kg3 h4+
                                    7. Kh3 Kh6 8. Kg4 Kg7 9. Kg5 Kh7 10.
                                    Qf7+ Kh8 11. Kxg6 h3 12. Qf8#
               23->  26.49  Mat12   1. Qe7+ Qg5 2. Qe4+ Qg4 3. Qe3 Qg2+
                                    4. Kxg2 Kg4 5. Qf3+ Kg5 6. Kg3 h4+
                                    7. Kh3 Kh6 8. Kg4 Kg7 9. Kg5 Kh7 10.
                                    Qf7+ Kh8 11. Kxg6 h3 12. Qf8#
              time=26.49  mat=-2  n=562479532  fh=99%  nps=21.2M
              extensions=107.3M qchecks=26.3M reduced=167.5M pruned=221.0M
              predicted=0  evals=1.6M  50move=0  EGTBprobes=0  hits=0
              SMP->  splits=133710  aborts=627  data=56/1024  elap=26.49
terminating SMP processes.

mate in 12 moves.

White&#40;1&#41;&#58; Qe7+
              time used&#58;  26.49

zullil · Post by **zullil** » Tue Apr 06, 2010 7:50 pm

rightrook wrote:This is an interesting end game study!

[D]8/7Q/6p1/7p/6qk/8/7K/8 w - - 0 1

See how fast your engine can ann. a mate here....

Stockfish also says Mate in 12:

Code: Select all

Searching&#58; 8/7Q/6p1/7p/6qk/8/7K/8 w - -
infinite&#58; 1 ponder&#58; 0 time&#58; 0 increment&#58; 0 moves to go&#58; 0
 2     -3.72   00&#58;00      187 Qc7 Qh3+ Kg1 Qg3+ Qxg3+ Kxg3 
 2     -3.39   00&#58;00      286 Qf7 Qe2+ Kg1 
 2     +0.00   00&#58;00      420 Qe7+ Qg5 Qb4+ Qg4 Qe7+ 
 3     +0.00   00&#58;00      594 Qe7+ Qg5 Qb4+ Qg4 Qe7+ 
 4     +0.00   00&#58;00      901 Qe7+ Qg5 Qb4+ Qg4 Qe7+ 
 5     +0.00   00&#58;00     1385 Qe7+ Qg5 Qb4+ Qg4 Qe7+ 
 6     +0.00   00&#58;00     2411 Qe7+ Qg5 Qb4+ Qg4 Qe7+ 
 7     +0.00   00&#58;00     4101 Qe7+ Qg5 Qb4+ Qg4 Qe7+ 
 8  >  +0.20   00&#58;00     8431 Qe7+ Qg5 Qe4+ Qg4 Qe3 
 9  >  +1.01   00&#58;00     8550 Qe7+ Qg5 Qe4+ Qg4 Qe3 
10  >  +4.24   00&#58;00     8777 Qe7+ Qg5 Qe4+ Qg4 Qe3 
11  > +86.26   00&#58;00    95598 Qe7+ Qg5 Qe4+ Qg4 Qe3 Qf3 Qxf3 Kg5 Kg3 h4+ Kh3 
                              Kh6 Kxh4 Kg7 Kg5 
12    +12.20   00&#58;00   122799 Qe7+ Qg5 Qe4+ Qg4 Qe3 Qf3 Qxf3 Kg5 Kg3 h4+ Kh3 
                              Kh6 Kxh4 Kg7 Kg5 
13    +89.30   00&#58;00   676038 Qe7+ Qg5 Qe4+ Qg4 Qe3 Qh3+ Qxh3+ Kg5 Qf3 Kh6 Qf6 
                              Kh7 Qf7+ Kh8 Qxg6 h4 Qg4 h3 Kxh3 Kh7 Kh4 Kh8 
14    +89.25   00&#58;00   716058 Qe7+ Qg5 Qe4+ Qg4 Qe3 Qh3+ Qxh3+ Kg5 Qf3 Kh6 Qf6 
                              Kh7 Qf7+ Kh8 Qxg6 h4 Qg4 h3 Kxh3 Kh7 Kh4 Kh8 
15    +89.30   00&#58;00   747298 Qe7+ Qg5 Qe4+ Qg4 Qe3 Qh3+ Qxh3+ Kg5 Qf3 Kh6 Qf6 
                              Kh7 Qf7+ Kh8 Qxg6 h4 Qg4 Kh7 Kh3 Kh8 Kxh4 
16    +89.30   00&#58;00   875792 Qe7+ Qg5 Qe4+ Qg4 Qe3 Qh3+ Qxh3+ Kg5 Qf3 Kh6 Qf6 
                              Kh7 Qf7+ Kh8 Qxg6 h4 Qg4 Kh7 Kh3 Kh8 Kxh4 
17    +89.35   00&#58;00    1288k Qe7+ Qg5 Qe4+ Qg4 Qe3 Qh3+ Qxh3+ Kg5 Qf3 Kh6 Qf6 
                              Kh7 Qf7+ Kh8 Qxg6 h4 Qg4 Kh7 Kh3 Kh8 Kxh4 Kh7 Qf3 
                              Kg7 Kh3 Kh6 
18    +89.35   00&#58;00    2103k Qe7+ Qg5 Qe4+ Qg4 Qe3 Qh3+ Qxh3+ Kg5 Qf3 Kh6 Qf6 
                              Kh7 Qf7+ Kh6 Kg3 h4+ Kxh4 g5+ Kh3 g4+ Kh4 g3 Kxg3 
                              Kg5 Qe6 Kh5 
19    +89.45   00&#58;01    3962k Qe7+ Qg5 Qe4+ Qg4 Qe3 Qh3+ Qxh3+ Kg5 Qf3 Kh6 Qf6 
                              Kh7 Qf7+ Kh6 Kg3 g5 Qf6+ Kh7 Qxg5 h4+ Kxh4 Kh8 
                              Qe5+ Kg8 Qf6 Kh7 Kg5 Kg8 Qe7 Kh8 Qf8+ Kh7 Qf7+ 
                              Kh8 Qf6+ Kh7 Qg6+ Kh8 Qh6+ Kg8 Qf6 Kh7 
20    +89.50   00&#58;01    7123k Qe7+ Qg5 Qe4+ Qg4 Qe3 Qh3+ Qxh3+ Kg5 Qf3 Kh6 Qf6 
                              Kh7 Qf7+ Kh6 Kg3 g5 Qf6+ Kh7 Qxg5 h4+ Kxh4 Kh8 
                              Kg4 Kh7 Kh5 Kh8 Kg6 
21       #12   00&#58;03   21301k Qe7+ Qg5 Qe4+ Qg4 Qe3 Qg2+ Kxg2 Kg4 Qf3+ Kg5 Kg3 
                              h4+ Kh3 Kh6 Kg4 Kg7 Kg5 h3 Qb7+ Kf8 Kf6 Kg8 Qg7# 
22       #12   00&#58;06   35964k Qe7+ Qg5 Qe4+ Qg4 Qe3 Qg2+ Kxg2 Kg4 Qf3+ Kg5 Kg3 
                              h4+ Kh3 Kh6 Kg4 Kg7 Kg5 h3 Qb7+ Kf8 Kf6 Kg8 Qg7# 
23       #12   00&#58;09   55640k Qe7+ Qg5 Qe4+ Qg4 Qe3 Qg2+ Kxg2 Kg4 Qf3+ Kg5 Kg3 
                              h4+ Kh3 Kh6 Kg4 Kg7 Kg5 h3 Qb7+ Kf8 Kf6 Kg8 Qg7# 
Nodes&#58; 68002776
Nodes/second&#58; 5583609
Best move&#58; Qe7+
Ponder move&#58; Qg5

Jan Brouwer · Post by **Jan Brouwer** » Tue Apr 06, 2010 7:55 pm

rightrook wrote:This is an interesting end game study!

[D]8/7Q/6p1/7p/6qk/8/7K/8 w - - 0 1

See how fast your engine can ann. a mate here....

Rotor claims mate in 11:

position fen 8/7Q/6p1/7p/6qk/8/7K/8 w - - 0 1
go
info string skipped ""
info depth 1 seldepth 2 nodes 4 nps 40 score cp -1033 hashfull 0 pv h7h5 g6h5
info depth 1 seldepth 2 nodes 41 nps 410 score cp -1028 hashfull 0 pv h7g6 g4g6
info depth 1 seldepth 2 nodes 66 nps 660 score cp -243 hashfull 0 pv h7g7
info depth 1 seldepth 2 nodes 97 nps 970 score cp -240 hashfull 0 pv h7f7 g4g3 h2h1
info depth 1 seldepth 2 nodes 104 nps 1040 score cp -227 hashfull 0 pv h7e7 g6g5
info depth 2 seldepth 4 nodes 336 nps 3360 score cp -217 hashfull 0 pv h7e7 g4g5 e7e4 g5g4
info depth 3 seldepth 6 nodes 850 nps 8500 score cp 0 hashfull 0 pv h7e7 g4g5 e7e4 g5g4 e4e7
info depth 4 seldepth 10 nodes 2651 nps 26510 score cp 653 hashfull 0 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4h3 e3h3 h4g5
info depth 5 seldepth 13 nodes 4957 nps 49570 score cp 666 hashfull 0 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4h3 e3h3 h4g5 h2g3
info depth 6 seldepth 13 nodes 11967 nps 119670 score cp 667 hashfull 1 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4f3 e3f3 h4g5 f3d5 g5f4
info depth 7 seldepth 17 nodes 26142 nps 261420 score cp 673 hashfull 2 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4f3 e3f3 h4g5 h2g2
info depth 8 seldepth 18 nodes 66258 nps 368100 score cp 691 hashfull 4 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4f3 e3f3 h4g5 h2h3 g5h6
info depth 9 seldepth 20 nodes 124148 nps 539773 score cp 714 hashfull 7 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4f3 e3f3 h4g5 h2g3 g5h6 g3f4
info depth 10 seldepth 23 nodes 389484 nps 828689 score cp 819 hashfull 17 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4h3 e3h3 h4g5 h3e6 g5h6 e6e7 g6g5 e7f6 h6h7 f6
g5
info depth 11 seldepth 23 nodes 784811 nps 955920 score cp 835 hashfull 31 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4f3 e3f3 h4g5 h2g3 g5h6 f3f7 h5h4 g3h4 g6g5 h4
g4
info depth 12 seldepth 25 nodes 1108590 nps 997830 score cp 838 hashfull 42 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4f3 e3f3 h4g5 h2g3 h5h4 g3h3 g5h6 f3f6 h6h7 h
3h4
info currmove h7f7 currmovenumber 2
info currmove h7g7 currmovenumber 3
info currmove h7g6 currmovenumber 4
info currmove h7h5 currmovenumber 5
info currmove h7d7 currmovenumber 6
info currmove h7c7 currmovenumber 7
info currmove h7b7 currmovenumber 8
info currmove h7a7 currmovenumber 9
info currmove h7g8 currmovenumber 10
info currmove h7h8 currmovenumber 11
info currmove h7h6 currmovenumber 12
info currmove h2h1 currmovenumber 13
info currmove h7e7 currmovenumber 1
info depth 13 seldepth 27 nodes 4068319 nps 1107025 score cp 906 hashfull 104 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4e2 e3e2 h4g5 e2e5 g5g4 e5f6 h5h4 f6g6 g4f4
g6f6 f4e3 f6e5 e3d3 h2h3 d3c4 h3h4
info currmove h7f7 currmovenumber 2
info currmove h7g7 currmovenumber 3
info currmove h7g6 currmovenumber 4
info currmove h7h5 currmovenumber 5
info currmove h7d7 currmovenumber 6
info currmove h7c7 currmovenumber 7
info currmove h7b7 currmovenumber 8
info currmove h7a7 currmovenumber 9
info currmove h7g8 currmovenumber 10
info currmove h7h8 currmovenumber 11
info currmove h7h6 currmovenumber 12
info currmove h2h1 currmovenumber 13
info currmove h7e7 currmovenumber 1
info depth 14 seldepth 29 nodes 5204914 nps 1122716 score cp 914 hashfull 145 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4e2 e3e2 h4g5 e2e5 g5g4 e5f6 h5h4 f6g6 g4f4
g6f6 f4g4 f6e5 h4h3 e5f6 g4h5 h2h3
info currmove h7f7 currmovenumber 2
info currmove h7g7 currmovenumber 3
info currmove h7g6 currmovenumber 4
info currmove h7h5 currmovenumber 5
info currmove h7d7 currmovenumber 6
info currmove h7c7 currmovenumber 7
info currmove h7b7 currmovenumber 8
info currmove h7a7 currmovenumber 9
info currmove h7g8 currmovenumber 10
info currmove h7h8 currmovenumber 11
info currmove h7h6 currmovenumber 12
info currmove h2h1 currmovenumber 13
info currmove h7e7 currmovenumber 1
info depth 15 seldepth 31 nodes 7510355 nps 1152071 score cp 933 hashfull 234 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4e2 e3e2 h4g5 e2f3 g5h6 f3f8 h6h7 f8f7 h7h6
h2g3 g6g5 f7f6 h6h7 f6g5 h7h8 g5h6 h8g8 h6h5
info currmove h7f7 currmovenumber 2
info currmove h7g7 currmovenumber 3
info currmove h7g6 currmovenumber 4
info currmove h7h5 currmovenumber 5
info currmove h7d7 currmovenumber 6
info currmove h7c7 currmovenumber 7
info currmove h7b7 currmovenumber 8
info currmove h7a7 currmovenumber 9
info currmove h7g8 currmovenumber 10
info currmove h7h8 currmovenumber 11
info currmove h7h6 currmovenumber 12
info currmove h2h1 currmovenumber 13
info currmove h7e7 currmovenumber 1
info depth 16 seldepth 33 nodes 10999170 nps 1186150 score cp 946 hashfull 358 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4e2 e3e2 h4g5 e2f3 g5h6 f3f6 h6h7 h2g3 h7g
8 f6g6 g8f8 g6h5 f8e7 g3f4 e7d7 h5d5 d7e7
info currmove h7f7 currmovenumber 2
info currmove h7g7 currmovenumber 3
info currmove h7g6 currmovenumber 4
info currmove h7h5 currmovenumber 5
info currmove h7d7 currmovenumber 6
info currmove h7c7 currmovenumber 7
info currmove h7b7 currmovenumber 8
info currmove h7a7 currmovenumber 9
info currmove h7g8 currmovenumber 10
info currmove h7h8 currmovenumber 11
info currmove h7h6 currmovenumber 12
info currmove h2h1 currmovenumber 13
info currmove h7e7 currmovenumber 1
info depth 17 seldepth 30 nodes 14333149 nps 1213953 score mate 11 hashfull 435 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4e2 e3e2 h4g5 e2f3 g5h6 h2g3 h6g7 g3h4 g7
h6 f3f8 h6h7 h4g5 h5h4 g5f6 g6g5 f8g7
info currmove h7f7 currmovenumber 2
info currmove h7g7 currmovenumber 3
info currmove h7g6 currmovenumber 4
info currmove h7h5 currmovenumber 5
info currmove h7d7 currmovenumber 6
info currmove h7c7 currmovenumber 7
info currmove h7b7 currmovenumber 8
info currmove h7a7 currmovenumber 9
info currmove h7g8 currmovenumber 10
info currmove h7h8 currmovenumber 11
info currmove h7h6 currmovenumber 12
info currmove h2h1 currmovenumber 13
info hashfull 437
bestmove h7e7

zullil · Post by **zullil** » Tue Apr 06, 2010 8:11 pm

Jan Brouwer wrote:
rightrook wrote:This is an interesting end game study!

[D]8/7Q/6p1/7p/6qk/8/7K/8 w - - 0 1

See how fast your engine can ann. a mate here....
Rotor claims mate in 11:

info depth 17 seldepth 30 nodes 14333149 nps 1213953 score mate 11 hashfull 435 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4e2

[D] 8/8/6p1/7p/6qk/4Q3/7K/8 b - - 5 3
What if Black plays g4g2 here instead of g4e2?

mhalstern · Post by **mhalstern** » Tue Apr 06, 2010 9:30 pm

6 man tablebases confirm a mate in 12.

You can query it her yourself:

http://www.k4it.de/index.php?topic=egtb&lang=en

Jan Brouwer · Post by **Jan Brouwer** » Tue Apr 06, 2010 9:32 pm

zullil wrote:
Jan Brouwer wrote:
rightrook wrote:This is an interesting end game study!

[D]8/7Q/6p1/7p/6qk/8/7K/8 w - - 0 1

See how fast your engine can ann. a mate here....
Rotor claims mate in 11:

info depth 17 seldepth 30 nodes 14333149 nps 1213953 score mate 11 hashfull 435 pv h7e7 g4g5 e7e4 g5g4 e4e3 g4e2

[D] 8/8/6p1/7p/6qk/4Q3/7K/8 b - - 5 3
What if Black plays g4g2 here instead of g4e2?

Rotor then claims mate in 9. Hmm...

yanquis1972 · Post by **yanquis1972** » Tue Apr 06, 2010 10:41 pm

somehow naum 4.2 sees this instantly (with 5 man TB). does anyone have an explanation for this?

jwes · Post by **jwes** » Tue Apr 06, 2010 11:35 pm

I suspect that Naum sees it very quickly, not instantly. White can apparently force an exchange in a few ply and then see the mate with egtbs.

Mate in 15

Mate in 15

Re: Mate in 15

Re: Mate in 15

Re: Mate in 15

Re: Mate in 15

Re: Mate in 15

Re: Mate in 15

Re: Mate in 15

Re: Mate in 15

Re: Mate in 15