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 |  Subject: Latest abrok Development Versions July 25 th (SF The gift that keeps on giving ) Thu Jul 25, 2019 2:05 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: Vizvezdenec
Date: Thu Jul 25 09:16:53 2019 +0200
Timestamp: 1564039013
Tweak of SEE pruning condition
passed STC
http://tests.stockfishchess.org/tests/view/5d386bda0ebc5925cf0ef49a
LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 56874 W: 12820 L: 12373 D: 31681 Elo +2.73
passed LTC
http://tests.stockfishchess.org/tests/view/5d38873a0ebc5925cf0ef86e
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 43512 W: 7547 L: 7247 D: 28718 Elo +2.40
Additional thanks to @locutus2 , @miguel-l and @xoto10 for fruitful discussion.
There may be some more elo there since this tweak was the first one and numbers
are more or less arbitrary.
Closes https://github.com/official-stockfish/Stockfish/pull/2256
Bench 3935523 | 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: Alain SAVARD
Date: Thu Jul 25 09:05:08 2019 +0200
Timestamp: 1564038308
Pawn clean up
Non functional simplification when we find the passed pawns in pawn.cpp
and some code clean up. It also better follows the pattern "flag the pawn"
and "score the pawn".
-------------------------
The idea behind the third condition for candidate passed pawn is a little
bit difficult to visualize. Just for the record, the idea is the following:
Consider White e5 d4 against black e6. d4 can (in some endgames) push
to d5 and lever e6. Thanks to this sacrifice, or after d5xe6, we consider
e5 as "passed".
However:
- if White e5/d4 against black e6/c6: d4 cannot safely push to d5 since d5 is double attacked;
- if White e5/d4 against black e6/d5: d4 cannot safely push to d5 since it is occupied.
This is exactly what the following expression does:
```
&& (shift(support) & ~(theirPawns | dblAttackThem)))
```
--------------------------
http://tests.stockfishchess.org/tests/view/5d3325bb0ebc5925cf0e6e91
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 124666 W: 27586 L: 27669 D: 69411 Elo -0.23
Closes https://github.com/official-stockfish/Stockfish/pull/2255
No functional change | 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: VoyagerOne
Date: Thu Jul 25 08:46:26 2019 +0200
Timestamp: 1564037186
LMR Tweak
Reset statScore to zero if negative and most stats shows >= 0
STC:
LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 23097 W: 5242 L: 4963 D: 12892 Elo +4.20
http://tests.stockfishchess.org/tests/view/5d31dd650ebc5925cf0e598f
LTC:
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 227597 W: 39013 L: 38191 D: 150393 Elo +1.25
http://tests.stockfishchess.org/tests/view/5d31fcdf0ebc5925cf0e5c13
Closes https://github.com/official-stockfish/Stockfish/pull/2252
Bench: 3242229 | 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: Alain SAVARD
Date: Thu Jul 25 08:32:49 2019 +0200
Timestamp: 1564036369
Passed file cleanup
Protonspring had a successful functional simplification that removes the
PassedFile array using a simple linear equation.
Merge the additive term S(5, 10) of protonspring passed file simplification
(pull request https://github.com/official-stockfish/Stockfish/pull/2250)
into the PassedRank array. This harmless change has a different bench because
the candidate passer evaluation will always get less compared to #2250,
as we apply bonus = bonus /2.
Tested as a non-regression against #2250
Passed STC
http://tests.stockfishchess.org/tests/view/5d33427e0ebc5925cf0e6fa2
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 81459 W: 18174 L: 18171 D: 45114 Elo +0.01
Passed LTC
http://tests.stockfishchess.org/tests/view/5d335c8d0ebc5925cf0e731e
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 18525 W: 3176 L: 3052 D: 12297 Elo +2.33
Closes https://github.com/official-stockfish/Stockfish/pull/2250
Closes https://github.com/official-stockfish/Stockfish/pull/2251
Bench: 3859856 | 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: Lolligerhans
Date: Thu Jul 25 08:23:43 2019 +0200
Timestamp: 1564035823
No influence on unsafeSquares of passers by pieces
Remove their pieces from influencing 'unsafeSquares' in passer
evaluation.
STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 36421 W: 8170 L: 8078 D: 20173 Elo +0.88
http://tests.stockfishchess.org/tests/view/5d22fc8e0ebc5925cf0cb26e
LTC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 18927 W: 3253 L: 3129 D: 12545 Elo +2.28
http://tests.stockfishchess.org/tests/view/5d26e2b20ebc5925cf0d3218
Closes https://github.com/official-stockfish/Stockfish/pull/2248
Bench: 3285659 | 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: Vizvezdenec
Date: Thu Jul 25 08:17:11 2019 +0200
Timestamp: 1564035431
Tweak LMR and killers
Give extra stat bonus/malus in case of LMR for killers.
passed STC
http://tests.stockfishchess.org/tests/view/5d2c8e760ebc5925cf0dcf23
LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 67188 W: 15030 L: 14534 D: 37624 Elo +2.56
passed LTC
http://tests.stockfishchess.org/tests/view/5d2d0ce40ebc5925cf0de115
LLR: 2.96 (-2.94,2.94) [0.00,3.50]
Total: 144355 W: 24739 L: 24153 D: 95463 Elo +1.41
Closes https://github.com/official-stockfish/Stockfish/pull/2246
bench 3723147 | 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: Alain SAVARD
Date: Thu Jul 25 08:07:55 2019 +0200
Timestamp: 1564034875
Space Invaders
Try a more ambitius simplification of the space bonus
STC http://tests.stockfishchess.org/tests/view/5d2b62c90ebc5925cf0da2a4
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 51299 W: 11320 L: 11257 D: 28722 Elo +0.43
LTC http://tests.stockfishchess.org/tests/view/5d2bac270ebc5925cf0db215
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 49761 W: 8409 L: 8335 D: 33017 Elo +0.52
Closes https://github.com/official-stockfish/Stockfish/pull/2243
bench: 3395999 |
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