Discussion of chess software programming and technical issues.
Moderators: hgm , Rebel , chrisw
Henk
Posts: 7220 Joined: Mon May 27, 2013 10:31 am
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by Henk » Wed Mar 24, 2021 11:59 pm
Also waste of resources.
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32 15 216032 187713121 d2d4 d7d5 c1f4 c8f5 e2e3 e7e6 f1d3 f5d3 c2d3 f8d6 g2g3 g8e7 g1f3 b8d7 f4d6 c7d6 b1c3 e8g8 e1g1 e6e5 e3e4 e5d4 f3d4 d7f6 d4f3 g8h8 c3d5 e7d5 e4d5 f6d5 d3d4 a7a5
By the way Stockfish reaches level 33 in about two minutes on my computer. So really something wrong with Skipper. 2160/60 = 36 minutes.
Henk
Posts: 7220 Joined: Mon May 27, 2013 10:31 am
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by Henk » Thu Mar 25, 2021 10:00 am
Show must go on. Taking about ten minutes now.
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33 6 56852 49573610 e2e4 g8f6 b1c3 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 d7d6 c1e3 c8e6 e1g1 e8g8 c3d5 c6d4 a1c1 c7c6 d5f6 g7f6 c2c3 d4f3 g2f3 e6c4 d3c4 b7b5 c4b5 c6b5 f1e1 f8e8 f3f4 e8e6 e3c5 d6c5
Henk
Posts: 7220 Joined: Mon May 27, 2013 10:31 am
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by Henk » Thu Mar 25, 2021 2:04 pm
Yeah
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34 2 58137 53515983 e2e4 e7e5 c2c4 c7c5 f1d3 f8d6 b1c3 g8f6 g1f3 b8c6 e1g1 e8g8 b2b3 b7b6 c1b2 c8b7 c3d5 c6d4 b2c3 d4f3 d1f3 h7h5 f3d1 b7c6 a1c1 a7a6 d5f6 g7f6 f1e1 f8e8 g2g3 e8e6 a2a4 a8a7
35 4 72886 65592110 e2e4 e7e5 c2c4 c7c5 f1d3 f8d6 b1c3 g8f6 g1f3 b8c6 e1g1 e8g8 b2b3 b7b6 c1b2 c8b7 c3d5 c6d4 b2c3 d4f3 d1f3 h7h5 f3d1 b7c6 a1c1 a7a6 d5f6 g7f6 f1e1 f8e8 g2g3 b6b5 a2a4 b5c4 b3c4
36 2 76891 68920997 e2e4 e7e5 c2c4 c7c5 f1d3 f8d6 b1c3 g8f6 g1f3 b8c6 e1g1 e8g8 b2b3 b7b6 c1b2 c8b7 c3d5 c6d4 b2c3 d4f3 d1f3 h7h5 f3d1 b7c6 a1c1 a7a6 d5f6 g7f6 f1e1 a8a7 g2g3 g8h8 a2a3 f8e8 a3a4 e8e6
Ugly moves by the way. f1d3?
Stockfish only needs three minutes to produce a pv at level 36 on my machine. Skipper uses about 13 minutes while using dreadful LMR reductions. R = 20. So this result is a bad joke.
Henk
Posts: 7220 Joined: Mon May 27, 2013 10:31 am
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by Henk » Fri Mar 26, 2021 10:35 am
LMR= 20
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42 13 15995 15916096 d2d4 d7d5 c1f4 b8c6 e2e3 g8f6 g1f3 c8g4 f1d3 e7e6 h2h3 g4f5 d3f5 e6f5 b1c3 f8d6 f4g5 d6e7 e1g1 e8g8 a1b1 g8h8 h3h4 h7h6 g5f4 e7d6 f3e5 a7a5 f2f3 h8g8 g2g3 a8a7 a2a3 a5a4 g1h1 a7a5 f1g1 g8h8 h1h2 h8g8 g1h1 g8h8
LMR = 30
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47 27 16926 14887659 g1f3 g8f6 d2d4 d7d5 e2e3 e7e6 f1d3 f8d6 b1c3 c7c5 c3b5 d6e7 c2c4 b8c6 e1g1 e8g8 c1d2 c8d7 d2c3 a8b8 g1h1 c5d4 e3d4 f8e8 f1g1 e7b4 a2a3 b4e7 g2g3 b7b6 a3a4 e7b4 g1f1 b4c3 b5c3 g7g5 f1e1 e8f8 h2h3 h7h5 a1a3 h5h4 c4d5 e6d5 e1g1 h4g3 f2g3
LMR = 40
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52 -9 96304 79070457 e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 c6d4 e3d4 c5d4 d1d4 g8f6 c2c4 d7d6 b1c3 e8g8 d4d1 c8e6 f1d3 c7c6 e1g1 a8c8 a1c1 a7a6 h2h3 b7b5 b2b3 d6d5 e4d5 b5c4 b3c4 c6d5 c4d5 f6d5 c3e4 c8c1 d1c1 a6a5 f1d1 a5a4 f2f3 h7h6 g1h2 g8h8 a2a3 f8e8 d3c4 f7f6 d1h1 d5f4
Henk
Posts: 7220 Joined: Mon May 27, 2013 10:31 am
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by Henk » Fri Mar 26, 2021 11:14 am
LMR= 80. Maybe beter set it to 1000 and see what happens
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82 24 39055 35257359 g1f3 d7d5 d2d4 g8f6 b1c3 e7e6 c1f4 f8d6 g2g3 b8c6 f1g2 e8g8 e1g1 a7a6 e2e3 d6f4 g3f4 c8d7 b2b3 a8c8 f1e1 f8e8 e3e4 d5e4 c3e4 f6d5 d1d2 b7b5 c2c3 g7g6 a1b1 e8f8 b1c1 f8e8 c1c2 e8f8 g1h1 f8e8 c2c1 h7h6 c1b1 e8f8 h1g1 f8e8 b1c1 e8f8 c1c2 f8e8 g1h1 g8h7 h2h4 h7h8 h1h2 h8g8 c2c1 e8f8 c1b1 f8e8 e1g1 c8b8 b1e1 b8c8 g1h1 e8f8 e1g1 f8e8 g1b1 g8h7 h1e1 h7g8
83 25 55210 48781033 g1f3 d7d5 d2d4 g8f6 b1c3 e7e6 c1f4 f8d6 g2g3 b8c6 f1g2 e8g8 e1g1 a7a6 e2e3 d6f4 g3f4 c8d7 b2b3 a8c8 f1e1 b7b5 e3e4 f6e4 c3e4 d5e4 e1e4 b5b4 a1b1 g7g6 b1c1 f8e8 g1h1 h7h6 c1b1 e8f8 h1g1 f8e8 b1c1 e8f8 e4e1 f8e8 c1b1 g6g5 f4g5 h6g5 b1c1 e8f8 g1h1 f8e8 c1b1 e8f8 e1e3 f8e8 b1c1 e8f8 h1g1 f8e8 c1b1 e8f8 e3e4 f8e8 b1c1 e8f8 g1h1 f8e8 c1b1 e8f8 e4e1 f8e8 b1c1 e8f8 e1e3 f8e8 c1b1 e8f8 h1g1 f8e8 b1c1 e8f8 e3e1 f8e8 c1b1
Sven
Posts: 4052 Joined: Thu May 15, 2008 9:57 pm
Location: Berlin, Germany
Full name: Sven Schüle
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by Sven » Fri Mar 26, 2021 11:44 am
Are you now solving chess?
Sven Schüle (engine author: Jumbo, KnockOut, Surprise)
Henk
Posts: 7220 Joined: Mon May 27, 2013 10:31 am
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by Henk » Fri Mar 26, 2021 11:58 am
No. It started with the problem why it was so difficult to search deeper than 20.
By the way taking too long now even with LMR=1000. Looks like it is getting stuck at level 90
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90 19 161101 134697214 d2d4 g8f6 b1c3 d7d5 g1f3 e7e6 e2e3 c7c5 f1d3 b8c6 e1g1 c5d4 e3d4 f8d6 c3b5 d6b8 c1e3 e8g8 c2c4 c8d7 a2a3 d5c4 d3c4 a7a6 b5c3 b8d6 c4d3 f6d5 e3d2 f7f5 g2g3 b7b5 h2h4 h7h6 a1c1 h6h5 c1a1 f8e8 g1h1 e8f8 a1c1 f8e8 f1g1 e8f8 c1a1 a8a7 g1g2 a7c7 g2h2 g8h8 d2g5 d8c8 h2g2 f8e8 h1h2 h8g8 h2g1 e8f8 g1h1 f8e8 g2h2 g8h8 h2h3 h8g8 g5d2 c8d8 h3h2 g8h8 a1c1 h8g8 d2g5 d8c8 c1b1 e8f8 g5d2 c8d8 b1c1
mvanthoor
Posts: 1784 Joined: Wed Jul 03, 2019 4:42 pm
Location: Netherlands
Full name: Marcel Vanthoor
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by mvanthoor » Fri Mar 26, 2021 12:29 pm
Henk wrote: ↑ Fri Mar 26, 2021 11:14 am
LMR= 80. Maybe beter set it to 1000 and see what happens
Set LMR to -50, so instead of reducing moves, it will extend them. It'll blow your mind.
Or, just write a new engine... that would probably waste much less of your time.
Wat is "level 90"? Is that 90 plies lookahead? Even Stockfish doesn't achieve that, except in pawn endgames. (But there, even my relatively primitive engine, already achieves 24 ply in under a second because of the transposition table.)
Henk
Posts: 7220 Joined: Mon May 27, 2013 10:31 am
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by Henk » Fri Mar 26, 2021 12:43 pm
Level 90 means 90 plies distance to horizon. Looks like getting beyond 90 is a challenge. In end game it reaches level 450 . I saw when playing a game against an older version. By the way it lost the game with at least two blunders. Although coming back from a lost position. So it is playing unstable.
Demonstrates again that high search depth is no indication of strength. You can choose any depth you want. Although passing 90?
Henk
Posts: 7220 Joined: Mon May 27, 2013 10:31 am
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by Henk » Fri Mar 26, 2021 1:37 pm
Skipper still too slow. When I set LMR = 1 I get no more than 60kn/s. So enough to do.