Natasha & Donna Dark Angels
Posts : 401 Reputation : 1925 Join date : 2011-03-13 Location : united kingdom....ish
| Subject: Latest aboke builds August 29th Wed Aug 29, 2018 3:59 pm | |
| !! latest version !!
Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: protonspring Date: Wed Aug 29 02:49:10 2018 +0200 Timestamp: 1535503750 Remove PawnsOnBothFlanks It looks like PawnsOnBothFlanks can be removed from initiative(). A barrage of tests seem to confirm that the adjustment to -110 does not gain elo to offset any potential loss by removing PawnsOnBothFlanks. STC LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 22014 W: 4760 L: 4639 D: 12615 Elo +1.91 http://tests.stockfishchess.org/tests/view/5b7f50cc0ebc5902bdbb3a3e LTC LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 40561 W: 6667 L: 6577 D: 27317 Elo +0.77 http://tests.stockfishchess.org/tests/view/5b801f9f0ebc5902bdbb4467 The barrage of 0,4 tests on the -136 value are in my ps_tunetests branch. http://tests.stockfishchess.org/tests/user/protonspring Closes https://github.com/official-stockfish/Stockfish/pull/1751 Bench: 4413173 ------------- How to continue from there? The fact that endgames with all the pawns on only one flank are drawish is a well-known chess idea, so it seems quite strange that this can be removed so easily without losing Elo. In the past there had been attempts to improve on PawnsOnBothFlanks with similar concepts (for instance using the pawn span value), but the tests were at best neutral. Maybe Stockfish is now mature enough that these refined ideas would work to replace PawnsOnBothFlanks? | Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers Linux x64 | Author: MJZ1977 Date: Wed Aug 29 02:28:09 2018 +0200 Timestamp: 1535502489 Fix bug with "excludedMove" for probcut Bugfix: "excludedMove" has to be skipped in the probcut loop too. If it is not skipped, the probcut can exit quickly with a wrong return value corresponding to the excluded move. See the following forum thread for a discussion: https://groups.google.com/forum/?fromgroups=#!topic/fishcooking/GGithf_VwSU STC : LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 17130 W: 3747 L: 3617 D: 9766 Elo +2.64 http://tests.stockfishchess.org/tests/view/5b8460c40ebc5902bdbb999a LTC : LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 12387 W: 2064 L: 1930 D: 8393 Elo +3.76 http://tests.stockfishchess.org/tests/view/5b8466f90ebc5902bdbb9a21 To go further : it can be perhaps useful to tune the singular extension search parameters. Closes https://github.com/official-stockfish/Stockfish/pull/1754 Bench: 4308541 | Windows x64 for Haswell CPUsWindows x64 for modern computersWindows x64Windows 32Linux x64 for Haswell CPUsLinux x64 for modern computersLinux x64Author: Vizvezdenec Date: Wed Aug 29 00:53:31 2018 +0200 Timestamp: 1535496811 Tweak stat bonus formula Tweak stat bonus formula on top of latest elo gain by @snicolet STC http://tests.stockfishchess.org/tests/view/5b830a810ebc5902bdbb7e9c LLR: 2.95 (-2.94,2.94) [0.00,4.00] Total: 27797 W: 6113 L: 5842 D: 15842 Elo +3.39LTC http://tests.stockfishchess.org/tests/view/5b831f2c0ebc5902bdbb8038 LLR: 2.95 (-2.94,2.94) [0.00,4.00] Total: 13655 W: 2294 L: 2099 D: 9262 Elo +4.96I think that more elo can be found in tweaks of this parameters so I plan to further try some "hand-tuning", including increasing/decreasing ratio of two constants and making bonus assimetric to 0. Thx to @AndyGrant for helping with github and @jerrydonaldwatson for original idea. Closes https://github.com/official-stockfish/Stockfish/pull/1748 Bench: 4172767 | |
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