Discussion of anything and everything relating to chess playing software and machines.
Moderators: hgm , Rebel , chrisw
zullil
Posts: 6442Joined: Tue Jan 09, 2007 12:31 amLocation: PA USAFull name: Louis Zulli
Post by zullil Mon Jul 17, 2017 6:11 pm
Nordlandia wrote: This complex 8-man position occured between SF Dev and K11 on Galaxy S8+ equipped with 5-men syzygy.
K11.2 and SF Dev is slightly above +1 in evaluation. It's not known if this is won or lost with good play.
[d]8/3b4/6k1/8/1R5p/1P1N1Kb1/8/8 b - - 0 54
Lichess analysis -
https://lichess.org/79gHh6uM#44
Latest asmFish with 6-man tables seems to see a draw:
Code: Select all
info depth 70 seldepth 75 multipv 1 time 399994 nps 40541117 score cp 0 nodes 16216203938 tbhits 339038594 hashfull 936 pv g6g5 b4c4 d7e6 c4c5 g5f6 b3b4 g3d6 c5h5 h4h3 h5h6 f6e7 f3e4 e6c8 d3f4 c8b7 e4f5 b7g2 b4b5 g2f1 f4h5 f1b5 h6h7 e7d8 h5f4 d6f4
zullil
Posts: 6442Joined: Tue Jan 09, 2007 12:31 amLocation: PA USAFull name: Louis Zulli
Post by zullil Mon Jul 17, 2017 8:29 pm
zullil wrote: Nordlandia wrote: This complex 8-man position occured between SF Dev and K11 on Galaxy S8+ equipped with 5-men syzygy.
K11.2 and SF Dev is slightly above +1 in evaluation. It's not known if this is won or lost with good play.
[d]8/3b4/6k1/8/1R5p/1P1N1Kb1/8/8 b - - 0 54
Lichess analysis -
https://lichess.org/79gHh6uM#44
Latest asmFish with 6-man tables seems to see a draw:
Code: Select all
info depth 70 seldepth 75 multipv 1 time 399994 nps 40541117 score cp 0 nodes 16216203938 tbhits 339038594 hashfull 936 pv g6g5 b4c4 d7e6 c4c5 g5f6 b3b4 g3d6 c5h5 h4h3 h5h6 f6e7 f3e4 e6c8 d3f4 c8b7 e4f5 b7g2 b4b5 g2f1 f4h5 f1b5 h6h7 e7d8 h5f4 d6f4
Code: Select all
info depth 101 seldepth 75 multipv 1 time 7791818 nps 41818030 score cp 0 nodes 325838481924 tbhits 8667689958 hashfull 999 pv g6g5 b4c4 d7e6 c4c5 g5f6 b3b4 g3d6 c5h5 h4h3 h5h6 f6e7 f3e4 e6c8 d3f4 c8b7 e4f5 b7g2 b4b5 g2f1 f4h5 f1b5 h6h7 e7d8 h5f4 d6f4
Nordlandia
Posts: 2821Joined: Fri Sep 25, 2015 9:38 pmLocation: Sortland, Norway
Post by Nordlandia Mon Jul 17, 2017 9:07 pm
Louis Zulli: SF and K won each time on 10m+10s time control.
zullil
Posts: 6442Joined: Tue Jan 09, 2007 12:31 amLocation: PA USAFull name: Louis Zulli
Post by zullil Mon Jul 17, 2017 10:26 pm
Nordlandia wrote: Louis Zulli: SF and K won each time on 10m+10s time control.
Yes, but only if Black plays incorrectly!
In the posted game, 56... Bc7 appears to be losing. Instead, Be6 draws. At least according to asmFish.
zullil
Posts: 6442Joined: Tue Jan 09, 2007 12:31 amLocation: PA USAFull name: Louis Zulli
Post by zullil Tue Jul 18, 2017 2:53 am
zullil wrote: Nordlandia wrote: Louis Zulli: SF and K won each time on 10m+10s time control.
Yes, but only if Black plays incorrectly!
In the posted game, 56... Bc7 appears to be losing. Instead, Be6 draws. At least according to asmFish.
Code: Select all
0.00 56... Be6 57. Ra5+ Kf6 58. b4 Bd6 59. Rh5 h3 60. Rh6+ Ke7 61. Ke4 Bc8 62. Nf4 Bb7+ 63. Kf5 Bg2 64. b5 Bc5 65. Kg4 Bf1 66. b6 Kd7 67. b7 Ba7 68. Rh8 Kc7 69. b8=R Bxb8 70. Nd5+ Kb7 71. Rh7+ Kc6 72. Nb4+ Kc5 73. Na6+ Bxa6 (depth 105, 3:28:18)
MikeGL
Posts: 1010Joined: Thu Sep 01, 2011 2:49 pm
Post by MikeGL Wed Jul 19, 2017 7:04 pm
Nordlandia wrote: ⚖️ | -1.15
[d]3r4/1p6/p1b5/5p1k/1R4p1/1P6/P1P1NP2/2K5 w - - 0 0
What was the actual result of this game? Looks like a slight chance for black to squeeze a win because of his outside passer at k-side. But a bigger chance for draw.
regards
Nordlandia
Posts: 2821Joined: Fri Sep 25, 2015 9:38 pmLocation: Sortland, Norway
Post by Nordlandia Wed Jul 19, 2017 8:36 pm
Mike: that game ended as draw. Timman's endgame experience saved the day
There is clearly winning chances for black.
Nordlandia
Posts: 2821Joined: Fri Sep 25, 2015 9:38 pmLocation: Sortland, Norway
Post by Nordlandia Wed Jul 19, 2017 8:49 pm
Isn't this winning?
BeyondCritics
Posts: 396Joined: Sat May 05, 2012 2:48 pmFull name: Oliver Roese
Post by BeyondCritics Fri Jul 21, 2017 10:20 pm
Nordlandia wrote: Isn't this winning?
Seemingly it is, but stockfish has big problems with that, since it mishandles its pawns. However you can elicit a winning line, if you use stockfsih with analysis extensions and manually figure out the refutations of some defence plans (play h5, play h6, stay pat with pawns). Then go back to the start position and wait.
zullil
Posts: 6442Joined: Tue Jan 09, 2007 12:31 amLocation: PA USAFull name: Louis Zulli
Post by zullil Sat Jul 22, 2017 12:54 am
BeyondCritics wrote: Nordlandia wrote: Isn't this winning?
Seemingly it is, but stockfish has big problems with that, since it mishandles its pawns. However you can elicit a winning line, if you use stockfsih with analysis extensions and manually figure out the refutations of some defence plans (play h5, play h6, stay pat with pawns). Then go back to the start position and wait.
Latest asmFish with 6-man tables says White wins. The solution was likely found earlier, but here's the only output I have to post:
Code: Select all
+128.32 [48... Rd8 49. Qa1+ Kg8 50. g4 Rd5 51. f4 Rd2+ 52. Kf1 Rd3 53. Qa8+ Kg7 54. h4 h6 55. Qa1+ Kg8 56. Kf2 h5 57. f5 exf5 58. gxh5 gxh5 59. Qg1+ Kf8 60. Qc1 Ke7 61. Qh6 Rd4 62. Qxh5 Ke6 63. Qh6+ Ke7 64. Kf3 Re4 65. Qh8 f6 66. Qg7+ Ke6 67. Qf8 Re5 68. Qe8+ Kd6 69. Qf7 Re6 70. Kf4 Kc6 71. Qxe6+ (depth 57, 1:45:54)
