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stockfish of the neural network

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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@lisandr wrote:
ChessMan:

My compilation of SF-PB-120921 x32-x64
with support for Polyglot Books (.bin)
SRC's updated by Skynet


Author: Michael Chaly
Date: Fri Sep 10 11:50:43 2021 +0200
Timestamp: 1631267443

Decrease depth for cutnodes with no tt move

By analogy to existing logic of decreasing depth for PvNodes w/o tt move
do the same for cutNodes.


Bench 5891181

Download: https://pixeldrain.com/u/gkoabreF


Hopely someone who's capable would like to compile this source of build engine into Android..

Please 🙏

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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Author: SFisGOD
Date: Wed Sep 15 17:50:20 2021 +0200
Timestamp: 1631721020

Update default net to nn-13406b1dcbe0.nnue

https://abrok.eu/stockfish/

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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Author: xoto10
Date: Fri Sep 17 08:14:36 2021 +0200
Timestamp: 1631859276

Increase optimumTime by 10%

STC 10+0.1 :
LLR: 2.94 (-2.94,2.94) <-0.50,2.50>
Total: 47032 W: 12078 L: 11841 D: 23113 Elo +1.75
Ptnml(0-2): 159, 5098, 12746, 5373, 140
https://tests.stockfishchess.org/tests/view/613f9df1f29dda16fcca8731

LTC 60+0.6 :
LLR: 2.95 (-2.94,2.94) <0.50,3.50>
Total: 66248 W: 16631 L: 16301 D: 33316 Elo +1.73
Ptnml(0-2): 44, 6560, 19578, 6906, 36
https://tests.stockfishchess.org/tests/view/6140603d7315e7c73204a4c1

Non-regression tests with other time control styles:

Moves/Time 40/10+0 :
LLR: 2.93 (-2.94,2.94) <-2.50,0.50>
Total: 51640 W: 13350 L: 13254 D: 25036 Elo +0.65
Ptnml(0-2): 183, 5770, 13797, 5908, 162
https://tests.stockfishchess.org/tests/view/6141592b7315e7c73204a599

TCEC Style 10+0.01 :
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 20592 W: 5300 L: 5157 D: 10135 Elo +2.41
Ptnml(0-2): 81, 2240, 5544, 2317, 114
https://tests.stockfishchess.org/tests/view/61425bb27315e7c73204a6a2

Sudden death 15+0 :
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 127104 W: 32728 L: 32741 D: 61635 Elo -0.04
Ptnml(0-2): 735, 13973, 34149, 13960, 735
https://tests.stockfishchess.org/tests/view/614256a77315e7c73204a699

The first 3 tests were run with an initial version of the code, which was then modified to make the amount of extra time dependent on the size of increment. No increment gives no extra time, and the extra time given increases until an increment of 1% or more of remaining time gives 10% extra thinking time.

closes https://github.com/official-stockfish/Stockfish/pull/3702

Bench 6658747

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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Author: Michael Chaly
Date: Tue Sep 21 19:48:40 2021 +0200
Timestamp: 1632246520

Combo of various parameter tweaks

Combination of parameter tweaks in search, evaluation and time management.
Original patches by snicolet xoto10 lonfom169 and Vizvezdenec.

Includes:

* Use bigger grain of positional evaluation more frequently (up to 1 exchange difference in non-pawn-material);
* More extra time according to increment;
* Increase margin for singular extensions;
* Do more aggresive parent node futility pruning.

Passed STC
https://tests.stockfishchess.org/tests/view/6147deab3733d0e0dd9f313d
LLR: 2.94 (-2.94,2.94) <-0.50,2.50>
Total: 45488 W: 11691 L: 11450 D: 22347 Elo +1.84
Ptnml(0-2): 145, 5208, 11824, 5395, 172

Passed LTC
https://tests.stockfishchess.org/tests/view/6147f1d53733d0e0dd9f3141
LLR: 2.94 (-2.94,2.94) <0.50,3.50>
Total: 62520 W: 15808 L: 15482 D: 31230 Elo +1.81
Ptnml(0-2): 43, 6439, 17960, 6785, 33

closes https://github.com/official-stockfish/Stockfish/pull/3710

bench 5575265

https://abrok.eu/stockfish/

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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Сompilation of ChessmanSF-PB-230921 x32-x64
with support for Polyglot Books (.bin)
SRC's updated by Skynet


Author: Michael Chaly
Date: Tue Sep 21 19:48:40 2021 +0200
Timestamp: 1632246520

Combo of various parameter tweaks


Bench 5575265

Download: https://pixeldrain.com/u/xdimu714

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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I am new here, please provide another link my windows 10 get error when trying to DL this link. Thank you.

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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@ferdauz wrote:
I am new here, please provide another link my windows 10 get error when trying to DL this link. Thank you.


https://www.dropbox.com/s/ys26jisf9bi37jv/Stockfish_PB_230921_x32-x64.7z?dl=0

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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Author: Stéphane Nicolet
Date: Thu Sep 23 23:19:06 2021 +0200
Timestamp: 1632431946

Detect search explosions

This patch detects some search explosions (due to double extensions in
search.cpp) which can happen in some pathological positions, and takes
measures to ensure progress in search even for these pathological situations.

While a small number of double extensions can be useful during search
(for example to resolve a tactical sequence), a sustained regime of
double extensions leads to search explosion and a non-finishing search.
See the discussion in https://github.com/official-stockfish/Stockfish/pull/3544
and the issue https://github.com/official-stockfish/Stockfish/issues/3532 .

The implemented algorithm is the following:

a) at each node during search, store the current depth in the stack.
Double extensions are by definition levels of the stack where the
depth at ply N is strictly higher than depth at ply N-1.

b) during search, calculate for each thread a running average of the
number of double extensions in the last 4096 visited nodes.

c) if one thread has more than 2% of double extensions for a sustained
period of time (6 millions consecutive nodes, or about 4 seconds on
my iMac), we decide that this thread is in an explosion state and
we calm down this thread by preventing it to do any double extension
for the next 6 millions nodes.

To calculate the running averages, we also introduced a auxiliary class
generalizing the computations of ttHitAverage variable we already had in
code. The implementation uses an exponential moving average of period 4096
and resolution 1/1024, and all computations are done with integers for
efficiency.

-----------

Example where the patch solves a search explosion:

```
./stockfish
ucinewgame
position fen 8/Pk6/8/1p6/8/P1K5/8/6B1 w - - 37 130
go infinite
```

This algorithm does not affect search in normal, non-pathological positions.
We verified, for instance, that the usual bench is unchanged up to depth 20
at least, and that the node numbers are unchanged for a search of the starting
position at depth 32.

-------------

See https://github.com/official-stockfish/Stockfish/pull/3714

Bench: 5575265

https://abrok.eu/stockfish/

descriptionstockfish of the neural network - Page 13 EmptyRe: stockfish of the neural network

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Author: Stéphane Nicolet
Date: Thu Sep 23 23:24:28 2021 +0200
Timestamp: 1632432268

Tweak doubly singular condition (Topo's patch)

This patch relax a little bit the condition for doubly singular moves
(ie moves that are so forced that we think that they deserve a local
double extension of the search). We lower the margin and allow up to
six such double extensions in the path between the root and the critical
node.

Original idea by Siad Daboul (@TopoIogist) in PR #3709

Tested with the previous commit:

passed STC:
LLR: 2.94 (-2.94,2.94) <-0.50,2.50>
Total: 33048 W: 8458 L: 8236 D: 16354 Elo +2.33
Ptnml(0-2): 120, 3701, 8660, 3923, 120
https://tests.stockfishchess.org/tests/view/614b24347bdc23e77ceb88fe

passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,3.50>
Total: 54176 W: 13712 L: 13406 D: 27058 Elo +1.96
Ptnml(0-2): 36, 5653, 15399, 5969, 31
https://tests.stockfishchess.org/tests/view/614b3b727bdc23e77ceb8911

closes https://github.com/official-stockfish/Stockfish/pull/3714

Bench: 5792377

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