MateFinder 9

[Master Om]

Cfish on Wide settings found it..


[Analysis "Cfish x64 WIDE"]
[AnalysisTime "237"]
[FEN "[D]rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1"]


1. Bd7 b4 2. Kf7 b3 3. Ke7 h5 4. Kd8 b2 5. Bxc7# {(0:03:57) 3959226kN}{[%eval
29995,27,Cfish x64 WIDE][%meval 237s|TB:13m]} *

[JohnS]

When you are looking for a mate, Tal will help!

OpenTal gets this very quickly with a depth of 32 in the search. Chestuci is also very quick.

[Jouni]

BTW both MateFinder 9 and Stockfish 9 now miss "mate the royal couple" 11 mover. They want to play 1.e3 resulting mate in 12. At least some older versions found 11x with 1.e4 easily.

[Master Om]

Thank you for your efforts on this.
MateFinder is clearly one of the best mate solvers around and it may be the very best for some complicated checkmates.

Is It ?

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[Analysis "MateFinder x 64"]
[AnalysisTime "705"]
[FEN "[D]rk1b4/p2p2p1/1P6/2R2P2/8/2K5/8/5B2 w - - 0 1"]
[SetUp "1"]

1. Rd5 Bf6+ 2. Kb4 d6 3. Ka5 axb6+ 4. Kxb6 Be5 5. Ra5 Bd4+ 6. Kb5 Rxa5+ 7.
Kxa5 Kc7 8. Bg2 Kd8 9. Kb4 Ke7 10. Kc4 Bc5 11. Kd5 Be3 12. Be4 Bf4 13. Kc4 Kf7
14. Kd5 Kf6 15. Bd3 Be5 16. Be4 Bg3 17. Bd3 Bf4 18. Be4 Be5 19. Kc4 Bg3 20.
Kd5 Ke7 21. Bd3 Be5 22. Ba6 Kf6 23. Bd3 Kf7 24. Be4 Bg3 25. Bd3 Ke7 26. Be4
Be1 27. Bd3 Bc3 28. Be4 Bb4 29. Bd3 Kf6 30. Be4 Bc5 {(0:11:45) 3242766kN}
{[%eval -8,55,MateFinder x 64][%meval 705s|TB:17m]} *

[Dann Corbit]

Yes, it is.

There will always be examples where tool X is better than tool Y, but for general purpose mates deeper than 9 plies I think that it is better than the alternatives.

[Vinvin]

BTW both MateFinder 9 and Stockfish 9 now miss "mate the royal couple" 11 mover. They want to play 1.e3 resulting mate in 12. At least some older versions found 11x with 1.e4 easily.

Yes, I've seen this thing with previous versions sometimes too.

With multi-pv, SF reports 1.Nc3 is mate in 11 as well. I hope it's not a bug :

Code: Select all

3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1

Stockfish_180303_x64_modern:
 55/24	04:51	 4 637 911k	15 936k	+M12	1.Nf3 Qd7 2.e3 Qg4 3.Nd4 Qxd1+ 4.Kxd1 Kf7 5.a4 Ke7 6.a5 Kd6 7.a6 Kc7 8.a7 Kd6 9.a8Q Ke5 10.Qf8 Kd5 11.Nc3+ Ke5 12.f4+
 55/24	04:51	 4 637 911k	15 936k	+M12	1.e3 Qg5 2.Qf3 Qg6 3.Nc3 Kd7 4.Nd5 Qe6 5.Bb5+ Kc8 6.Qf8+ Kb7 7.Qg7+ Kb8 8.Qc7+ Ka8 9.Bc6+ Qxc6 10.Qxc6+ Ka7 11.Qb6+ Ka8 12.Nc7+
 55/24	04:51	 4 637 911k	15 936k	+M12	1.d4 Qa5+ 2.Nc3 Qh5 3.Qd3 Kf7 4.e4 Qg6 5.Qb5 Ke7 6.Qe5+ Qe6 7.Qg7+ Kd8 8.Bb5 Kc8 9.Bf4 Qe7 10.Qg8+ Qf8 11.Qxf8+ Kb7 12.Qb8+
 55/22	04:51	 4 637 911k	15 936k	+M11	1.Nc3 Qg5 2.e4 Kf8 3.d4 Qg6 4.Qf3+ Kg8 5.Bc4+ Kh7 6.Qh3+ Kg7 7.Qd7+ Kh8 8.Qe7 Qxe4+ 9.Qxe4 Kg7 10.Qe8 Kf6 11.Qf7+
 55/22	04:51	 4 637 911k	15 936k	+M11	1.e4 Qd4 2.Qf3 Qg7 3.d4 Qxd4 4.Qf5 Kd8 5.Bg5+ Kc7 6.Bf4+ Qd6 7.Qc5+ Kd8 8.Bxd6 Ke8 9.Qe5+ Kd8 10.Qe7+ Kc8 11.Ba6+

[zullil]

May be your position is too difficult. Try a #5.

[D]rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1
Current SF could not solve it in some hours. One thread, slow computer.
Kind regards
Bernhard

Almost two days, and SF-dev (1 thread) still hasn't found the mate in 5. In fact, this search has taken so long that this SF-dev is no longer the current SF-dev!

Code: Select all

info depth 75 seldepth 90 multipv 1 score cp -29 nodes 1053586662484 nps 6481904 hashfull 999 tbhits 0 time 162542754 pv e6d5 b8c8 d5a8 c7c4 e5g7 b5b4 g6h6 c8c7 a8d5 c4c5 d5e4 c5a5 g7d4 a5a6 h6g5 a6a3 g5f4 c7d6 e4f3 a7a5 f4e4 a5a4 f3d1 b4b3 e4d3 b3b2 d3c2 b2b1q c2b1 a3d3 d1a4 d3d4 a4b3 d4d2 b1c1 d2f2 b3c2 d6c5 c1d1 c5d4 c2b1 f2g2 b1f5 d4c3 d1e1 g2b2 f5g4 c3d4 g4f5 d4e3 e1d1 b2e2 f5b1 e2d2 d1c1 d2h2 c1d1 e3d4 b1f5 d4c3 f5g6 h2b2 g6e4 b2d2 d1e1 d2a2 e4f5 c3d4 f5e6 a2g2 e1d1 d4e5 e6b3 e5f4 b3e6 g2f2 e6c4 f4f3 c4e6 f3g3 d1e1 g3g2 e6c8 g2f3

[Spliffjiffer]

probably it saw the mate last night but decided not to show it because other engines would lough and die by this joke, these guys are the only sparring partners after all

[Jouni]

I remember there are 4 mate in 11 moves, but my current engines have difficult to find one . May be 1.e4,d4,c4 and Rf3?

[zullil]

May be your position is too difficult. Try a #5.

[D]rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1
Current SF could not solve it in some hours. One thread, slow computer.
Kind regards
Bernhard

Almost two days, and SF-dev (1 thread) still hasn't found the mate in 5. In fact, this search has taken so long that this SF-dev is no longer the current SF-dev!

Code: Select all

info depth 75 seldepth 90 multipv 1 score cp -29 nodes 1053586662484 nps 6481904 hashfull 999 tbhits 0 time 162542754 pv e6d5 b8c8 d5a8 c7c4 e5g7 b5b4 g6h6 c8c7 a8d5 c4c5 d5e4 c5a5 g7d4 a5a6 h6g5 a6a3 g5f4 c7d6 e4f3 a7a5 f4e4 a5a4 f3d1 b4b3 e4d3 b3b2 d3c2 b2b1q c2b1 a3d3 d1a4 d3d4 a4b3 d4d2 b1c1 d2f2 b3c2 d6c5 c1d1 c5d4 c2b1 f2g2 b1f5 d4c3 d1e1 g2b2 f5g4 c3d4 g4f5 d4e3 e1d1 b2e2 f5b1 e2d2 d1c1 d2h2 c1d1 e3d4 b1f5 d4c3 f5g6 h2b2 g6e4 b2d2 d1e1 d2a2 e4f5 c3d4 f5e6 a2g2 e1d1 d4e5 e6b3 e5f4 b3e6 g2f2 e6c4 f4f3 c4e6 f3g3 d1e1 g3g2 e6c8 g2f3

Mate in five!

Code: Select all

info depth 76 seldepth 88 multipv 1 score mate 5 nodes 1810956908759 nps 6781644 hashfull 999 tbhits 0 time 267038006 pv e6d7 b5b4 g6f7 h6h5 f7e7 b4b3 e7d8 b3b2 e5c7