I think mate is provable here
[d] rq3rk1/p1pnnp2/1p2p1pP/2bp2P1/5P2/1PN1PQ2/PBPP4/2K3RR w - - 0 17
Probably a deep mate
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xr_a_y
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peter
- Posts: 3498
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Re: Probably a deep mate
After quite some Forward- Backward:
rq3rk1/p1pnnp2/1p2p1pP/2bp2P1/5P2/1PN1PQ2/PBPP4/2K3RR w - - 0 1
Analysis by MateFinder 050320 64:
17.h7+ Kh8 18.Nxd5+ e5 19.fxe5 Nf5 20.e6+ Bd4 21.exd4 fxe6 22.Nf4 Qe8 23.Qc6 Ng3 24.Rxg3 Rxf4 25.d5+ e5 26.Re3 Rb8 27.Qe6 Qxe6 28.dxe6 Rf7 29.Rxe5 Nxe5 30.exf7 Kg7 31.Rf1 a5 32.f8Q+ Rxf8 33.Bxe5+ Rf6 34.Rxf6 b5 35.h8Q+ Kxh8 36.Rf8+ Kh7 37.Rh8#
+- (#21) Depth: 55/42 00:02:17 7505MN
Edit: One move DTM less already with a little more play and rewind:
rq3rk1/p1pnnp2/1p2p1pP/2bp2P1/5P2/1PN1PQ2/PBPP4/2K3RR w - - 0 1
Analysis by MateFinder 050320 64:
17.h7+ Kh8 18.Nxd5+ e5 19.fxe5 Nf5 20.e6+ Bd4 21.exd4 fxe6 22.Nf4 Qe8 23.Qc6 Ng7 24.d5 e5 25.Nxg6+ Qxg6 26.Qxg6 a5 27.Rf1 a4 28.bxa4 b5 29.Rf7 Rxf7 30.Qxf7 Rd8 31.Qe7 Re8 32.Qxd7 bxa4 33.Qf7 Rb8 34.Bxe5 Rb1+ 35.Kxb1 a3 36.Qxg7#
+- (#20) Depth: 49/40 00:03:32 11141MN
regards
Last edited by peter on Sun Nov 28, 2021 8:05 pm, edited 1 time in total.
Peter.
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jonkr
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Re: Probably a deep mate
Slow Chess (multi-threaded) finds mate in 1 minute 30s, but not the shortest mate.
Code: Select all
SlowChess Blitz 2.81 avx2 (4096 MB hash, 16 threads)
FEN: rq3rk1/p1pnnp2/1p2p1pP/2bp2P1/5P2/1PN1PQ2/PBPP4/2K3RR w - - 0 1
[37] M22 03:45.4 3454.58M h7+ Kg7 Nxd5+ f6 gxf6+ Rxf6 Nxe7 Bxe7 Rxg6+ Kf7 Rgg1 Bc5 Qh5+ Ke7 Bxf6+ Nxf6 Rg7+ Kd6 Qe5+ Kc6 h8=Q Bd6 Rxc7+ Kxc7 Qhxf6 Bxe5 Rh7+ Kc6 fxe5 Qe8 Qf4 b5 Qe4+ Kb6 Qb7+ Kc5 Rc7+ Kb4 Rc4+ Ka5 b4+ Ka4 Qa6#
[33] M23 02:40.7 2569.90M h7+ Kg7 Nxd5+ f6 gxf6+ Rxf6 Nxe7 Bxe7 Rxg6+ Kf7 Rgg1 Bc5 Qh5+ Ke7 Bxf6+ Nxf6 Rg7+ Kd6 Qe5+ Kc6 h8=Q Bd6 Qxb8 Rxb8 Qxe6 Rg8 Rxg8 Nxg8 Qxg8 Ba3+ Kb1 b5 Rh8 Kb6 Qd5 a6 Rb8+ Ka5 Qc6 Bd6 Qc3+ b4 Qc6 Be7 Qa4#
[31] M26 01:30.6 1549.79M h7+ Kh8 Nxd5+ e5 fxe5 Nf5 e6+ Bd4 exd4 fxe6 Nf4 Qe8 Qc6 Ng7 d5 Rxf4 Bxg7+ Kxg7 h8=Q+ Qxh8 Rxh8 Rxh8 dxe6 Rhf8 Qxd7+ Kg8 e7 Rf1+ Rxf1 Rxf1+ Kb2 Re1 Qe8+ Kh7 Qf7+ Kh8 Qf8+ Kh7 Qh6+ Kg8 Qxg6+ Kh8 Qf6+ Kg8 g6 Rxe7 Qxe7 c6 Qh7+ Kf8 Qf7#
[30] M30 01:30.2 1544.83M h7+ Kg7 Nxd5+ f6 gxf6+ Rxf6 Nxe7 Bxe7 Rxg6+ Kf7 Rgg1 Bc5 Qh5+ Ke7 Bxf6+ Nxf6 Rg7+ Kd6 Qe5+ Kc6 h8=Q Bd6 Qxb8 Rxb8 Qxe6 Rg8 Rxg8 Nxg8 Qc4+ Bc5 Qe4+ Kd6 Qg6+ Kd7 Qxg8 Ba3+ Kd1 Kc6 Qc4+ Kb7 Qd5+ Ka6 Qg8 Bc5 Qc4+ Kb7 Qd5+ Ka6 Qc6 Ba3 <tt>
[29] M... 01:25.0 1471.53M h7+ Kg7 [--]
[29] M249 01:24.8 1468.66M h7+ [++]
[28] 26.12 01:04.3 1130.49M h7+ Kg7 Nxd5+ f6 gxf6+ Rxf6 Nxe7 Bxe7 Rxg6+ Kf7 Rgg1 Bc5 Qh5+ Ke7 Bxf6+ Kd6 h8=Q Qxh8 Bxh8 Rxh8 Qxh8 b5 Rh7 Kc6 Qa8+ Kb6 Rxd7 Bd6 Rgg7 e5 Qb8+ Kc5 fxe5 Bxe5 d4+ Bxd4 Rxd4
[27] 19.32 00:32.8 583.37M h7+ Kh8 Nxd5+ e5 fxe5 Nf5 e6+ Bd4 exd4 fxe6 Nf4 Qe8 Qc6 Ng3 d5+ e5 Nxg6+ Qxg6 Qxg6 Ne2+ Kb1 Nxg1 Rxg1 Rae8 Qc6 Re7 g6 Rg7 Qxc7 Re8 Qxa7 Rc8 Qb7 Re8 d6 Rd8 Qc6 Rf8 d4 Nb8 Qxb6 Nd7 Qb5 Rf6 dxe5 Re6 Qc6 Nf8
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peter
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- Full name: Peter Martan
Re: Probably a deep mate
Yet no problem as for that with a little Forward- Backward, SlowChess once again shows its great mate search:
rq3rk1/p1pnnp2/1p2p1pP/2bp2P1/5P2/1PN1PQ2/PBPP4/2K3RR w - - 0 1
Analysis by SlowChess Blitz 2.8 avx2:
17.h7+ Kh8 18.Nxd5+ e5 19.fxe5 Nf5 20.e6+ Bd4 21.exd4 fxe6 22.Nf4 Qe8 23.Qc6 Ng7 24.d5 e5 25.Nxg6+ Qxg6 26.Qxg6 a5 27.Rf1 a4 28.bxa4 b5 29.Rf7 Rxf7 30.Qxf7 Rd8 31.Qe7 Rf8 32.Qxd7 Rf1+ 33.Rxf1 Kxh7 34.Qf7 Kh8 35.Bxe5 bxa4 36.Qxg7#
+- (#20) Depth: 44/59 00:01:42 1848MN, tb=74303
30 threads of 16x3.5GHz Ryzen (avx2 compile) 32G hash,
Syzygy Probe Depth set to max. to reduce number of hits without having to take tbs- path out of GUI regards
Peter.