Stockfish-NNUE

zot · Post by **zot** » 04/04/2020, 15:54

Gator007 wrote:I haven't looked much at the latest Black Diamond, but the HoneyxR1 engine is good for analysis.

Do You know when we should use Defensive option in HoneyR1 ? Default is true.

Nemesis · Post by **Nemesis** » 04/04/2020, 16:09

Another friend says this regarding the 'Profound' setting and I quote -

So far I've been unimpressed by Honey and the profound setting. They may be great in positions where there's a move to find, but not a good move chooser when there's several options. Also, if you're going to look for alternative moves anyway, profound is only going to slow you down.

I've not had the opportunity to confirm this - working on the 110gb+ March LiChess database

Post by **timetraveller** » 05/04/2020, 7:45

Author: protonspring
Date: Sun Apr 5 08:35:31 2020 +0200
Timestamp: 1586068531

remove KNPK endgame code

In more than 100k local KNPK games, there is no discernible difference between master and master with this endgame removed: master:42971, patch:42973, draws: 3969. Removal does not seem to regress in normal games.

STC
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 46390 W: 8998 L: 8884 D: 28508 Elo +0.85
Ptnml(0-2): 707, 5274, 11163, 5300, 751
https://tests.stockfishchess.org/tests/view/5e83b18ee42a5c3b3ca2ef02

LTC
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 44768 W: 5863 L: 5814 D: 33091 Elo +0.38
Ptnml(0-2): 251, 3918, 14028, 3905, 282
https://tests.stockfishchess.org/tests/view/5e84a82a4411759d9d0984f4

In tests with a book of endgames that can convert into KNPK, no significant difference can be seen either

```
TC 1.0+0.01
Score of patch vs master: 6131 - 6188 - 27681 [0.499] 40000
Elo difference: -0.5 +/- 1.9, LOS: 30.4 %, DrawRatio: 69.2 %

TC 2.0+0.02
Score of patch vs master: 5740 - 5741 - 28519 [0.500] 40000
Elo difference: -0.0 +/- 1.8, LOS: 49.6 %, DrawRatio: 71.3 %
``

closes https://github.com/official-stockfish/Stockfish/pull/2611

Bench 4512059
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
Author: 31m059
Date: Sun Apr 5 08:39:00 2020 +0200
Timestamp: 1586068740

Retire candidate passed pawns

Before this commit, some pawns were considered "candidate" passed pawns and given half bonus. After this commit, all of these pawns are scored as passed pawns, and they do not receive less bonus.

STC:
LLR: 2.95 (-2.94,2.94) {-1.50,0.50}
Total: 21806 W: 4320 L: 4158 D: 13328 Elo +2.58
Ptnml(0-2): 367, 2526, 5001, 2596, 413
https://tests.stockfishchess.org/tests/view/5e86b4724411759d9d098639

LTC:
LLR: 2.95 (-2.94,2.94) {-1.50,0.50}
Total: 12590 W: 1734 L: 1617 D: 9239 Elo +3.23
Ptnml(0-2): 96, 1187, 3645, 1238, 129
https://tests.stockfishchess.org/tests/view/5e86d2874411759d9d098640

This PR and commit are dedicated to our colleague Stefan Geschwentner (@locutus2), one of the most respected and accomplished members of the Stockfish developer community. Stockfish is a volunteer project and has always thrived because of Stefan's talent, insight, generosity, and dedication. Welcome back, Stefan!

closes https://github.com/official-stockfish/Stockfish/pull/2613

Bench: 4831963
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Author: Vizvezdenec
Date: Sun Apr 5 08:44:25 2020 +0200
Timestamp: 1586069065

Further increase reductions with increasing number of threads

This patch doubles the reduction increase with thread count.

passed STC
https://tests.stockfishchess.org/tests/view/5e874f5a4411759d9d098696
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 9162 W: 1558 L: 1385 D: 6219 Elo +6.56
Ptnml(0-2): 90, 958, 2343, 1069, 121

passed LTC
https://tests.stockfishchess.org/tests/view/5e8762804411759d9d09869f
LLR: 2.94 (-2.94,2.94) {0.25,1.75}
Total: 79364 W: 9541 L: 9159 D: 60664 Elo +1.67
Ptnml(0-2): 462, 6880, 24661, 7172, 507

closes https://github.com/official-stockfish/Stockfish/pull/2615

bench 4831963
source

Post by **timetraveller** » 07/04/2020, 17:20

Author: Vizvezdenec
Date: Tue Apr 7 17:47:01 2020 +0200
Timestamp: 1586274421

Introduce capture history pruning

This patch introduces a heuristic that is similar to countermove based pruning but for captures - capture history pruning. The idea is that we can (almost) safely prune really late captures with negative history if they don't give check so will most likely not produce some king-attacking tactic.

passed STC
https://tests.stockfishchess.org/tests/view/5e8c60d40ffd2be7f15e5470
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 23748 W: 4758 L: 4529 D: 14461 Elo +3.35
Ptnml(0-2): 421, 2712, 5400, 2899, 442

passed LTC
https://tests.stockfishchess.org/tests/view/5e8c72bf0ffd2be7f15e547f
LLR: 2.96 (-2.94,2.94) {0.25,1.75}
Total: 17330 W: 2415 L: 2190 D: 12725 Elo +4.51
Ptnml(0-2): 126, 1561, 5107, 1704, 167

closes https://github.com/official-stockfish/Stockfish/pull/2618

bench 4417023
source

Ambrox · Post by **Ambrox** » 09/04/2020, 15:30

Hey all,

This is experimental — it's Stockfish with large pages, the ability to use two books and an optimized time management strategy (it will think longer in critical positions).

https://drive.google.com/open?id=15Vz_12nybs1-wR9BSu-XwhESmZnJ1Crl

Post by **M.Z** » 09/04/2020, 23:51

Ambrox wrote:Hey all,

This is experimental — it's Stockfish with large pages, the ability to use two books and an optimized time management strategy (it will think longer in critical positions).

https://drive.google.com/open?id=15Vz_12nybs1-wR9BSu-XwhESmZnJ1Crl

@Ambrox
In the 64-bit version you forgot to run the strip command
In accordance with the GPL code it is also necessary to publish the source code in order not to commit a violation.
I invite you to publish the source code thanks.

kramnik · Post by **kramnik** » 10/04/2020, 7:17

M.Z wrote: @Ambrox
In the 64-bit version you forgot to run the strip command
In accordance with the GPL code it is also necessary to publish the source code in order not to commit a violation.
I invite you to publish the source code thanks.

Is this the reason why we don't get Raubfisch anymore?

Post by **M.Z** » 10/04/2020, 8:30

kramnik wrote:
M.Z wrote: @Ambrox
In the 64-bit version you forgot to run the strip command
In accordance with the GPL code it is also necessary to publish the source code in order not to commit a violation.
I invite you to publish the source code thanks.
Is this the reason why we don't get Raubfisch anymore?

I don't know why Karl stopped sharing his engine.
We have a section here:
http://outskirts.altervista.org/forum/viewforum.php?f=17
where he always shared.

mymoso · Post by **mymoso** » 10/04/2020, 14:16

Hello everyone

Perhaps one of the reasons that Karl has suspended updates to his excellent engine is due to inadequate requests for source code.
Some were even impolite and aggressive.
I sincerely hope that we can get back to the engine. I love it and have won several tournaments on playchess.com with it.

Greetings from Brazil.

moonstonelight · Post by **moonstonelight** » 10/04/2020, 14:58

mymoso wrote:Hello everyone

Perhaps one of the reasons that Karl has suspended updates to his excellent engine is due to inadequate requests for source code.
Some were even impolite and aggressive.
I sincerely hope that we can get back to the engine. I love it and have won several tournaments on playchess.com with it.

Greetings from Brazil.

Me too. It was one of the most aggressive engines I think.

kramnik · Post by **kramnik** » 11/04/2020, 6:28

Stockfish Polyglot: Updated Avril, 11 2020.

Changelog: Matching Stockfish beta having timestamp 1586274421 - Introduce capture history pruning.

For Windows and Android (NOT UPDATED FOR ANDROID), NO LINUX, NO MACOS.

tacos40 · Post by **tacos40** » 11/04/2020, 13:13

Kramnik:
- First of all, I hope you, family and friends are well, within all this pandemia/quarantine world problem
- Second: thank you for keeping releases of SF bin capable. There is a bit of time I dont test it, though, I want again

- Third, question: Was BIN book "best book move" issue fixed ? It's the reason I stopped using it time ago

Thank you again in advance

kramnik · Post by **kramnik** » 11/04/2020, 14:05

My family is ok. I didn't change anything in the way I merge the code, so it acts exactly like Brainfish regarding the best book move.

tacos40 wrote:Kramnik:
- First of all, I hope you, family and friends are well, within all this pandemia/quarantine world problem
- Second: thank you for keeping releases of SF bin capable. There is a bit of time I dont test it, though, I want again
- Third, question: Was BIN book "best book move" issue fixed ? It's the reason I stopped using it time ago

Thank you again in advance

FlyingDutchman · Post by **FlyingDutchman** » 11/04/2020, 18:46

kramnik wrote:Stockfish Polyglot: Updated Avril, 11 2020.

Changelog: Matching Stockfish beta having timestamp 1586274421 - Introduce capture history pruning.

For Windows and Android (NOT UPDATED FOR ANDROID), NO LINUX, NO MACOS.

Think there is a problem with this version. It doesn't seem to use bin books configured.

Looking at the web-site the bin books may have their own names and different directories.

On Infinity Chess as a test I use an empty BIX (main) book and configured 2 bin books.
When game started it starts calculating from move one and doesn't play a move from bin books.

Btw does this engine use large pages?

Thanks for you're efforts.

With kind regards FlyingDutchman aka Victorious.

Scorpio · Post by **Scorpio** » 12/04/2020, 18:50

The latest from: http://abrok.eu/stockfish/

Author: protonspring
Date: Sun Apr 12 20:34:50 2020 +0200
Timestamp: 1586716490

Always remember the ttMove

In master, if the received ttMove meets the prescribed conditions in the various MovePicker constructors, it is returned as the first move, otherwise we set it to MOVE_NONE. If set to MOVE_NONE, we no longer track what the ttMove was, and it will might be returned later in a list of generated moves. This may be a waste. With this patch, if the ttMove fails to meet the prescribed conditions, we simply skip the TT stages, but still store the move and make sure it's never returned.

STC
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 66424 W: 12903 L: 12806 D: 40715 Elo +0.51
Ptnml(0-2): 1195, 7730, 15230, 7897, 1160

LTC
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 45682 W: 5989 L: 5926 D: 33767 Elo +0.48
Ptnml(0-2): 329, 4361, 13443, 4334, 374

closes https://github.com/official-stockfish/Stockfish/pull/2616

Bench 4928928

Outskirts CheSS ForuM

Outskirts CheSS ForuM

Stockfish-NNUE

Honey XIr1...

Honey XIr1...

Stockfish

Stockfish

Stockfish X

Stockfish X

Stockfish X

Stockfish X

Stockfish X

Stockfish X

Stockfish Polyglot

Stockfish Polyglot

Stockfish Polyglot

Stockfish Polyglot

Stockfish