Search found 5088 matches

by zullil
Mon Apr 22, 2019 10:50 pm
Forum: Computer Chess Club: General Topics
Topic: A hard puzzle for human and Lco, but SF solved it in 1 sec, WoW!
Replies: 3
Views: 241

Re: A hard puzzle for human and Lco, but SF solved it in 1 sec, WoW!

8/1p3p2/1p2p3/7p/2P1P3/k6P/6P1/4K3 w - - 0 1 White to move and win! Wow, SF in my 4 cores laptop solve this puzzle in 1 sec. Wow! Leela cant solve even after 0.5 million nodes in my laptop ( latest net 42070) Stockfish-dev has settled on mate-in-29: info depth 63 seldepth 58 multipv 1 score mate 29...
by zullil
Mon Apr 22, 2019 10:14 pm
Forum: Computer Chess Club: General Topics
Topic: A hard puzzle for human and Lco, but SF solved it in 1 sec, WoW!
Replies: 3
Views: 241

Re: A hard puzzle for human and Lco, but SF solved it in 1 sec, WoW!

8/1p3p2/1p2p3/7p/2P1P3/k6P/6P1/4K3 w - - 0 1 White to move and win! Wow, SF in my 4 cores laptop solve this puzzle in 1 sec. Wow! Leela cant solve even after 0.5 million nodes in my laptop ( latest net 42070) Stockfish-dev has settled on mate-in-29: info depth 63 seldepth 58 multipv 1 score mate 29...
by zullil
Sun Apr 21, 2019 11:57 pm
Forum: Computer Chess Club: General Topics
Topic: Contrived position for perft
Replies: 14
Views: 372

Re: Contrived position for perft

elcabesa wrote:
Sun Apr 21, 2019 8:31 am
if my engine is not wrong those are the results:
1: 60
2: 2608
3: 113742
4: 4812099
5: 202902054
6: 8419356881
My perft agrees:
FEN string = r3k2r/1bp2pP1/5n2/1P1Q4/1pPq4/5N2/1B1P2p1/R3K2R b KQkq c3 0 1
Depth = 6
Leaf nodes = 8419356881
Time taken = 89945 ms
by zullil
Thu Apr 04, 2019 6:52 pm
Forum: Computer Chess Club: General Topics
Topic: Mate in 82?
Replies: 21
Views: 1353

Re: Mate in 82?

If anyone is interested, here's the mate in 82 that Komodo 12.3 found: [FEN "8/1p1p2p1/5p1p/5P1P/1p1p1P2/pP1P1P2/P1k1B3/4K3 w - -"] 1. Bf1 Kc1 2. Bh3 Kc2 3. Ke2 Kc1 4. Bg2 Kc2 5. Bf1 Kc3 6. Ke1 Kc2 7. Be2 Kb1 8. Kd2 Kb2 9. Bd1 Kb1 10. Bc2+ Kb2 11. Kd1 Ka1 12. Kc1 Kxa2 13. Bd1 Ka1 14. Be2 Ka2 15. Kc...
by zullil
Wed Apr 03, 2019 12:22 pm
Forum: Computer Chess Club: General Topics
Topic: A position that white might win
Replies: 8
Views: 429

Re: A position that white might win

Old Kaissa III would prefer 33...Kh8 instead of going to f8 and the score does not rise so much anymore. But it probably means not so much and also no tablebases were used. 2r3k1/2r2p1p/1p2p1p1/p2pP3/2q2P1P/2nN1N2/3Q2P1/2R1R1K1 w - - Engine: Kaissa III (512 MB) by T. Romstad, M. Costalba, J. Kiiski...
by zullil
Wed Apr 03, 2019 10:29 am
Forum: Computer Chess Club: General Topics
Topic: A position that white might win
Replies: 8
Views: 429

Re: A position that white might win

32.f5 is winning according stockfish dev. New game Line 2r3k1/2r2p1p/1p2p1p1/p2pP3/2q2P1P/2nN1N2/3Q2P1/2R1R1K1 w - - 0 1 Analysis by Stockfish 310319 64 BMI2: 32.f5 gxf5 33.Qg5+ Kf8 34.Nf4 b5 35.Kh2 b4 36.Nh5 Qg4 37.Qh6+ Ke7 38.Nf6 Qg6 39.Qe3 h5 40.Qb6 Kf8 41.Qd6+ Kg7 42.Ne8+ Rxe8 43.Qxc7 Ra8 44.Ng...
by zullil
Tue Mar 26, 2019 12:09 pm
Forum: Computer Chess Club: General Topics
Topic: SF misevaluates position, case #3095768
Replies: 3
Views: 346

Re: SF misevaluates position, case #3095768

2b5/8/p1p2pk1/P1Pp1p1p/1P1P1P2/3B1P1K/8/8 w - - 0 201 This is the final position from a game in a recently completed 40/40 test. The game was adjudicated as a draw on the 200th move. Hard to see how White could make progress here, yet recent SF dev builds give around +1.38 up to depth=90 with 6-men...
by zullil
Tue Mar 26, 2019 10:10 am
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 37
Views: 1571

Re: Revisiting g5 (Tough Tactical Test Position?)

A bit longer run, seems about like the others to me: Searching: r1bq2rk/2p4n/1p1p1npb/pN1Pp2p/1PP1Pp1P/P4N2/2BBQPP1/RR3K2 w - - 0 1 infinite: 0 time: 0 increment: 0 moves to go: 0 1 +1.00 00:00 7040 Kg1 2 +1.08 00:00 42223 bxa5 bxa5 3 +0.53 00:00 66639 bxa5 bxa5 c5 4 +0.42 00:00 106114 bxa5 bxa5 c5...
by zullil
Sun Mar 24, 2019 7:47 pm
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 37
Views: 1571

Re: Revisiting g5 (Tough Tactical Test Position?)

Hi Louis! -2.13 1... Rg8 2. Bd1 g5 3. hxg5 Nxg5 4. Qd3 Nf6 5. Nxg5 Rxg5 6. Bf3 Bg4 7. Kf1 Qd7 8. bxa5 bxa5 9. c5 h4 10. Ke2 Nxe4 11. Qxe4 Bf5 12. Qc4 e4 13. Bc3+ Kh7 14. Kd2 Rxg2 15. Bxe4 f3+ 16. Kd1 Re8 17. Nxd6 cxd6 18. Rb7 Qxb7 19. Bxf5+ Kg8 20. Be6+ Kf8 21. c6 Qh7 22. c7 Rg1+ 23. Be1 Qh8 24. Rb...