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stockfish of the neural network

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Stockfish 220307 latest nnue for Android

download
https://pixeldrain.com/u/Quy83TKT

dev build
https://github.com/official-stockfish/Stockfish/commit/27139dedac14af400f5b18e2ab50aca3f8cf0e33

network
https://tests.stockfishchess.org/api/nn/nn-01795d2428f2.nnue

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Stockfish 220308 latest nnue for Android

download
https://pixeldrain.com/u/1JiCpbac

network
https://tests.stockfishchess.org/api/nn/nn-0f83fe50d7eb.nnue

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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you Sf is very bad error engine on android 12

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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Author: Michael Chaly
Date: Tue Mar 8 20:19:42 2022 +0100
Timestamp: 1646767182

Decrease reductions in Lmr for some Pv nodes

This patch makes us reduce less in Lmr at pv nodes in case of static eval being far away from static evaluation of position.
Idea is that if it's the case then probably position is pretty complex so we can't be sure about how reliable LMR is so we need to reduce less.

Passed STC:
https://tests.stockfishchess.org/tests/view/6226276aa9d47c8160e81220
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 262696 W: 69944 L: 69239 D: 123513 Elo +0.93
Ptnml(0-2): 1399, 29702, 68436, 30417, 1394

Passed LTC:
https://tests.stockfishchess.org/tests/view/6226b002a9d47c8160e82b91
LLR: 2.95 (-2.94,2.94) <0.50,3.00>
Total: 64008 W: 17320 L: 16982 D: 29706 Elo +1.83
Ptnml(0-2): 60, 6378, 18811, 6674, 81

closes https://github.com/official-stockfish/Stockfish/pull/3957

bench 6678390

https://abrok.eu/stockfish/

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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Author: Giacomo Lorenzetti
Date: Sat Mar 12 09:38:34 2022

Author: FauziAkram
Date: Sat Mar 12 09:25:58 2022


https://abrok.eu/stockfish/

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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Author: mstembera
Date: Sun Mar 13 08:17:02 2022 +0100
Timestamp: 1647155822

Small cleanups (2)

- fix a small compile error under MSVC
- improve sigmoid comment and assert
- fix formatting in README.md

closes https://github.com/official-stockfish/Stockfish/pull/3960

No functional change

https://abrok.eu/stockfish/

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SF-PB-130322_x64, Updated to "Small cleanups (2)".
Engines https://pixeldrain.com/u/aWLN6X3W

Network https://tests.stockfishchess.org/api/nn/nn-6877cd24400e.nnue

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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Helo

What advantage of PB has an advantage over the abrok version?

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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bin book parameter

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waldemar


how r ya ? :)

what is the command line to use 2 or 3 bin book in the polyglot.ini ?

thaaaaanx :)

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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Author: Stefan Geschwentner
Date: Sat Mar 19 13:40:35 2022 +0100
Timestamp: 1647693635

Remove ttPv tree shrinking.

Via the ttPv flag an implicit tree of current and former PV nodes is maintained. In addition this tree is grown or shrinked at the leafs dependant on the search results. But now the shrinking step has been removed.

As the frequency of ttPv nodes decreases with depth the shown scaling behavior (STC barely passed but LTC scales well) of the tests was expected.

STC:
LLR: 2.93 (-2.94,2.94) <-2.25,0.25>
Total: 270408 W: 71593 L: 71785 D: 127030 Elo -0.25
Ptnml(0-2): 1339, 31024, 70630, 30912, 1299
https://tests.stockfishchess.org/tests/view/622fbf9dc9e950cbfc2376d6

LTC:
LLR: 2.96 (-2.94,2.94) <-2.25,0.25>
Total: 34368 W: 9135 L: 8992 D: 16241 Elo +1.45
Ptnml(0-2): 28, 3423, 10135, 3574, 24
https://tests.stockfishchess.org/tests/view/62305257c9e950cbfc238964

closes https://github.com/official-stockfish/Stockfish/pull/3963

Bench: 7044203

https://abrok.eu/stockfish/

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ChessFan1 wrote:


Any update to the latest 19th March version of Stockfish?

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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Author: Giacomo Lorenzetti
Date: Fri Mar 25
20:14:00 2022 +0100
Timestamp: 1648235640

Remove pos.capture_or_promotion()

This patch replaces `pos.capture_or_promotion()` with `pos.capture()`
and comes after a few attempts with elo-gaining bounds, two of which
failed yellow at LTC
(https://tests.stockfishchess.org/tests/view/622f8f0cc9e950cbfc237024
and
https://tests.stockfishchess.org/tests/view/62319a8bb3b498ba71a6b2dc).

Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/623aff7eea447151c74828d3
LLR: 2.94 (-2.94,2.94) <-2.25,0.25>
Total: 246864 W: 65462 L: 65618 D: 115784 Elo -0.22
Ptnml(0-2): 1201, 28116, 65001, 27866, 1248

Passed non-regression LTC:
https://tests.stockfishchess.org/tests/view/623c1fdcea447151c7484fb0
LLR: 2.94 (-2.94,2.94) <-2.25,0.25>
Total: 30120 W: 8125 L: 7978 D: 14017 Elo +1.70
Ptnml(0-2): 22, 2993, 8881, 3144, 20

closes https://github.com/official-stockfish/Stockfish/pull/3968

Bench: 6847732

https://abrok.eu/stockfish/

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A new(?) type of Neural Network for move ordering http://talkchess.com/forum3/viewtopic.php?f=2&t=79589

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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koko1971 wrote:
waldemar


how r ya ? :)

what is the command line to use 2 or 3 bin book in the polyglot.ini ?

thaaaaanx :)


Im fine thx

You need to use an engine that supports 2 or 3 bin books. And add command lines for them.

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Author: Topologist
Date: Mon Mar 28 22:43:52 2022 +0200
Timestamp: 1648500232

Play more positional in endgames

This patch chooses the delta value (which skews the nnue evaluation between positional and materialistic)
depending on the material: If the material is low, delta will be higher and the evaluation is shifted
to the positional value. If the material is high, the evaluation will be shifted to the psqt value.
I don't think slightly negative values of delta should be a concern.

Passed STC:
https://tests.stockfishchess.org/tests/view/62418513b3b383e86185766f
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 28808 W: 7832 L: 7564 D: 13412 Elo +3.23
Ptnml(0-2): 147, 3186, 7505, 3384, 182

Passed LTC:
https://tests.stockfishchess.org/tests/view/62419137b3b383e861857842
LLR: 2.96 (-2.94,2.94) <0.50,3.00>
Total: 58632 W: 15776 L: 15450 D: 27406 Elo +1.93
Ptnml(0-2): 42, 5889, 17149, 6173, 63

closes https://github.com/official-stockfish/Stockfish/pull/3971

Bench: 7588855

https://abrok.eu/stockfish/

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Author: mstembera
Date: Fri Apr 1 10:55:11 2022 +0200

Timestamp: 1648803311

Minor cleanups

simplify and relocate to position.cpp some of the recent threat calculations used in the movepicker.

passed STC:
https://tests.stockfishchess.org/tests/view/62468c301f682ea45ce3b3b9
LLR: 2.96 (-2.94,2.94) <-2.25,0.25>
Total: 76544 W: 20247 L: 20152 D: 36145 Elo +0.43
Ptnml(0-2): 327, 8113, 21317, 8168, 347

closes https://github.com/official-stockfish/Stockfish/pull/3972

No functional change

https://abrok.eu/stockfish/

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SF-PB-010422_x64, "Minor cleanups" https://github.com/official-stockfish/Stockfish/commit/9f6bcb38c032a18c8b1aec318d5c7255827f9c7b

Engines https://pixeldrain.com/u/4KuLexLh

Network https://tests.stockfishchess.org/api/nn/nn-6877cd24400e.nnue

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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ChessFan1 wrote:


How abt the update for CorChess PB, ur baby?

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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Triton6654 wrote:

I added support for books a couple of times, unfortunately CorChess is much weaker than SF (both times it lost badly). I see no reason to do it again.

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Author: Topologist
Date: Tue Apr 12 17:43:50 2022 +0200
Timestamp: 1649778230

Use NNUE in low piece endgames close to the root.

This patch enforces that NNUE evaluation is used for endgame positions at shallow depth (depth <= 9).
Classic evaluation will still be used for high imbalance positions when the depth is high or there are many pieces.

Passed STC:
https://tests.stockfishchess.org/tests/view/624c193b3a8a6ac93892dc27
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 255840 W: 68024 L: 67362 D: 120454 Elo +0.90
Ptnml(0-2): 1074, 27089, 70926, 27763, 1068

Passed LTC:
https://tests.stockfishchess.org/tests/view/624e8675e9e7821808467f77
LLR: 2.94 (-2.94,2.94) <0.50,3.00>
Total: 67088 W: 17784 L: 17454 D: 31850 Elo +1.71
Ptnml(0-2): 45, 6209, 20715, 6521, 54

closes https://github.com/official-stockfish/Stockfish/pull/3978

bench: 6602222

https://abrok.eu/stockfish/

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SF-PB???????

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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SF-PB-120422_x64. "Use NNUE in low piece endgames close to the root."
Engines https://pixeldrain.com/u/1jCdD9Lc

Network https://tests.stockfishchess.org/api/nn/nn-6877cd24400e.nnue

descriptionstockfish of the neural network - Page 18 EmptyRe: stockfish of the neural network

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Author: FauziAkram
Date: Sat Apr 16 08:41:51 2022 +0200
Timestamp: 1650091311

Tuning classical and NNUE scaling terms

changes to parameters in both classical and NNUE scaling, following up from an earlier successful #3958

passed STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.50>
Total: 23936 W: 6490 L: 6234 D: 11212 Elo +3.72
Ptnml(0-2): 107, 2610, 6306, 2810, 135
https://tests.stockfishchess.org/tes...c40bb9d964e6ae

passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,3.00>
Total: 50376 W: 13629 L: 13327 D: 23420 Elo +2.08
Ptnml(0-2): 20, 4979, 14920, 5217, 52
https://tests.stockfishchess.org/tes...d7f5008a33a4d1

closes https://github.com/official-stockfis...fish/pull/3982

Bench: 6964954

+ 2 more versions

https://abrok.eu/stockfish/

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SF-PB-160422, "Tuning classical and NNUE scaling terms."

Engines https://pixeldrain.com/u/egjL2BXj

Network https://tests.stockfishchess.org/api/nn/nn-6877cd24400e.nnue

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