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 |  Subject: Latest abrok Development Version October 2nd (SF The gift that keeps on giving ) Wed Oct 02, 2019 3:32 pm | |
| !! latest version !!
Windows x64 for Haswell CPUs
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Linux x64 for Haswell CPUs
Linux x64 for modern computers
Linux x64 | Author: Moez Jellouli
Date: Wed Oct 2 13:37:00 2019 +0200
Timestamp: 1570016220
More accurate pawn attack span definition
Tweak the pawn attack span for backward pawns and the zone behind
opponent opposing pawns. This is important in positional play and
one of weaknesses of the engine in recent high level games.
STC
LLR: -2.95 (-2.94,2.94) [0.50,4.50]
Total: 66843 W: 14884 L: 14717 D: 37242 Elo +0.87
http://tests.stockfishchess.org/tests/view/5d8dcb1b0ebc590f3beb2956
LTC
LLR: 2.96 (-2.94,2.94) [0.00,3.50]
Total: 77699 W: 12993 L: 12602 D: 52104 Elo +1.75
http://tests.stockfishchess.org/tests/view/5d8de9bc0ebc590f3beb3d00
See discussion in https://github.com/official-stockfish/Stockfish/pull/2332
Bench: 4012371 | 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: Joost VandeVondele
Date: Wed Oct 2 01:43:02 2019 +0200
Timestamp: 1569973382
Adjust reductions based on the number of threads
In lazySMP it makes sense to prune a little more, as multiple threads
search wider. We thus increase the prefactor of the reductions slowly
as a function of the threads. The prefactor of the log(threads) term
is a parameter, this pull request uses 1/2 after testing.
passed STC @ 8threads:
LLR: 2.96 (-2.94,2.94) [0.50,4.50]
Total: 118125 W: 23151 L: 22462 D: 72512 Elo +2.03
http://tests.stockfishchess.org/tests/view/5d8bbf4d0ebc59509180f217
passed LTC @ 8threads:
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 67546 W: 10630 L: 10279 D: 46637 Elo +1.81
http://tests.stockfishchess.org/tests/view/5d8c463b0ebc5950918167e8
passed ~LTC @ 14threads:
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 74271 W: 12421 L: 12040 D: 49810 Elo +1.78
http://tests.stockfishchess.org/tests/view/5d8db1f50ebc590f3beb24ef
Note:
A larger prefactor (1) passed similar tests at STC and LTC (8 threads),
while a very large one (2) passed STC quickly but failed LTC (8 threads).
For the single-threaded case there is no functional change.
Closes https://github.com/official-stockfish/Stockfish/pull/2337
Bench: 4088701
Fixup: remove redundant code. | 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: Tue Oct 1 09:12:57 2019 +0200
Timestamp: 1569913977
Remove ThreatByRank
This is a functional simplification that removes ThreatByRank.
STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 48009 W: 10630 L: 10560 D: 26819 Elo +0.51
http://tests.stockfishchess.org/tests/view/5d92095c0ebc594fb88eb61e
LTC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 18682 W: 3177 L: 3053 D: 12452 Elo +2.31
http://tests.stockfishchess.org/tests/view/5d9231120ebc594fb88ebacd
Moving forward, it's possible that ThreatByMinor and ThreatByRook
could be combined, but I haven't really contemplated that yet.
Closes https://github.com/official-stockfish/Stockfish/pull/2336
bench 4088701 |
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