Stockfish-NNUE

[timetraveller]

Author: protonspring
Date: Wed Mar 25 21:42:33 2020 +0100
Timestamp: 1585168953

Remove KNPKB endgame.

This is a functional simplification that removes the KNPKB endgame.

Testing on only KNPKB positions suggests that this removal actually gains Elo:

Score of patch vs master: 3380 - 3035 - 33585 [0.504] 40000
Elo difference: 3.0 +/- 1.4, LOS: 100.0 %, DrawRatio: 84.0 %

Score of patch vs master: 290 - 36 - 39674 [0.503] 40000
Elo difference: 2.2 +/- 0.3, LOS: 100.0 %, DrawRatio: 99.2 %

removal also doesn't cause a regression with the standard book:

STC
LLR: 2.95 (-2.94,2.94) {-1.50,0.50}
Total: 71376 W: 13794 L: 13719 D: 43863 Elo +0.37
Ptnml(0-2): 1066, 8092, 17290, 8181, 1059
https://tests.stockfishchess.org/tests/view/5e76c3d5e42a5c3b3ca2e8be

LTC
LLR: 2.95 (-2.94,2.94) {-1.50,0.50}
Total: 28394 W: 3731 L: 3662 D: 21001 Elo +0.84
Ptnml(0-2): 167, 2339, 9116, 2408, 167
https://tests.stockfishchess.org/tests/view/5e76e5eae42a5c3b3ca2e8d3

closes https://github.com/official-stockfish/Stockfish/pull/2594

Bench 5480811
source

[timetraveller]

Author: Lyudmil Antonov
Date: Thu Mar 26 17:49:28 2020 +0100
Timestamp: 1585241368

Tuned history reduction

Value after a long Bayesian tuning, using a home-made classification approach.

STC
https://tests.stockfishchess.org/tests/view/5e7c7b16e42a5c3b3ca2eb66
LLR: 2.96 (-2.94,2.94) {-0.50,1.50}
Total: 45472 W: 8992 L: 8732 D: 27748 Elo +1.99
Ptnml(0-2): 795, 5276, 10352, 5500, 813

LTC
https://tests.stockfishchess.org/tests/view/5e7c8be7e42a5c3b3ca2eb75
LLR: 2.94 (-2.94,2.94) {0.25,1.75}
Total: 22744 W: 3085 L: 2849 D: 16810 Elo +3.61
Ptnml(0-2): 156, 2090, 6658, 2298, 170

closes https://github.com/official-stockfish/Stockfish/pull/2597

Bench 5030855
--------------------------------------------------------------------------------------------------------------------------
Author: xoto10
Date: Thu Mar 26 17:46:51 2020 +0100
Timestamp: 1585241211

Remove passed_count from almostUnwinnable.

This simplification allows the almostUnwinnable flag to match endgames where the pawns are all on the same flank but are not symmetrical.

STC:
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 23356 W: 4543 L: 4395 D: 14418 Elo +2.20
Ptnml(0-2): 346, 2651, 5582, 2707, 392
https://tests.stockfishchess.org/tests/view/5e7b8f57e42a5c3b3ca2eb09

LTC:
LLR: 2.96 (-2.94,2.94) {-1.50,0.50}
Total: 31778 W: 4097 L: 4023 D: 23658 Elo +0.81
Ptnml(0-2): 199, 2853, 9729, 2891, 217
https://tests.stockfishchess.org/tests/view/5e7ba5ade42a5c3b3ca2eb16

closes https://github.com/official-stockfish/Stockfish/pull/2596

Bench 4777139
source

[timetraveller]

Author: Vizvezdenec
Date: Sun Mar 29 19:48:01 2020 +0200
Timestamp: 1585504081

Count only the most advanced passed pawn for each file.

This patch adjusts definition of passed pawns - if there is a pawn of our color in the same file in front of a current pawn it's no longer counts as passed.

passed STC
https://tests.stockfishchess.org/tests/view/5e802037e42a5c3b3ca2ed07
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 215296 W: 41843 L: 41341 D: 132112 Elo +0.81
Ptnml(0-2): 3688, 25313, 49304, 25495, 3848

passed LTC
https://tests.stockfishchess.org/tests/view/5e806441e42a5c3b3ca2ed2b
LLR: 2.95 (-2.94,2.94) {0.25,1.75}
Total: 74050 W: 9761 L: 9379 D: 54910 Elo +1.79
Ptnml(0-2): 510, 6838, 22025, 7064, 588

closes https://github.com/official-stockfish/Stockfish/pull/2602

bench: 4902237
--------------------------------------------------------------------------------------------------------------------
Author: xoto10
Date: Sun Mar 29 19:44:07 2020 +0200
Timestamp: 1585503847

Remove previousScore adjustment of delta.

STC:
LLR: 2.95 (-2.94,2.94) {-1.50,0.50}
Total: 14580 W: 2904 L: 2731 D: 8945 Elo +4.12
Ptnml(0-2): 243, 1665, 3339, 1762, 281
https://tests.stockfishchess.org/tests/view/5e7d080ae42a5c3b3ca2ebc6

LTC:
LLR: 2.95 (-2.94,2.94) {-1.50,0.50}
Total: 60338 W: 7870 L: 7831 D: 44637 Elo +0.22
Ptnml(0-2): 451, 5596, 18018, 5671, 433
https://tests.stockfishchess.org/tests/view/5e7d11b3e42a5c3b3ca2ebd3

closes https://github.com/official-stockfish/Stockfish/pull/2598

Bench 5247262
source

[timetraveller]

Author: Joost VandeVondele
Date: Mon Mar 30 22:46:07 2020 +0200
Timestamp: 1585601167

Small cleanups

https://github.com/official-stockfish/Stockfish/pull/2584

No functional change.
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Author: Praveen tummala
Date: Mon Mar 30 22:41:22 2020 +0200
Timestamp: 1585600882

Movecount pruning reduction logic

This patch refines search reduction logic in case the position is not a former PV node and is pruned based on move count.

passed STC
https://tests.stockfishchess.org/tests/view/5e8092bde42a5c3b3ca2ed35
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 78848 W: 15480 L: 15170 D: 48198 Elo +1.37
Ptnml(0-2): 1406, 9310, 17773, 9438, 1497

passed LTC
https://tests.stockfishchess.org/tests/view/5e80bb13e42a5c3b3ca2ed4b
LLR: 2.94 (-2.94,2.94) {0.25,1.75}
Total: 86596 W: 11451 L: 11033 D: 64112 Elo +1.68
Ptnml(0-2): 624, 7993, 25687, 8329, 665

closes https://github.com/official-stockfish/Stockfish/pull/2605

Bench: 5138771
source

[ZamChess]

Honey XIr1 by Mike Byrne source released

"a modest 5 to 7 elo gain, but now with some of the HekaStockfish presearch code, modified, which I have labeled profound.

The profound (presearch) code does a much wider search early on - I offer two profound settings and they are both simply on and off switches.

As part of my testing , I had determined that the setting should be a higher value as the the time control increases this is done automatically by th e time control selected:

this setting is turned on by default for Honey BlueFish and Black-Diamond and off for Stockfish flavor XIr1 as that version always keep that in sync with cur-dev Stockfish functionally

option name Profound type check default true

the go infinite cand the go depth commands does not use a time control, so there is a second setting called :

option name Deep_Pro_Analysis type check default false which is always off by default.

It is to be used with 15 minute analysis . For longer analysis, say 1 hour , you might be better off using go movetime 3600000 ( or go mt 3600 , mt is in seconds . movetime is in milliseconds

You also now type 's' or 'set' to view all available command line terminal shortcuts"

https://github.com/MichaelB7/Stockfish/archive/honey.zip


Honey-XI-r1

@MichaelB7 MichaelB7 released this 14 hours ago

Lewes
It is my pleasure to release Honey XIr1 and related binaries to Chess enthusiasts everywhere.
Based on current-dev-Stockfish, its existence is solely based on the hard work by the very creative Stockfish team.

Windows, Mac Linux
Mac and Linux have officially dropped 32 bit support and so have I.
The base windows 32 bit and 64 bit versions are compiled for the lowest common denominator systems.
The Threadripper for Windows has bmi1 instructions , but not the bmi2 instructions ( and large pages is on by default)
Enjoy !
Michael Byrne


Thanks a lot Mike and Happy Birthday !

[pottboy]

good morning

sorry when i asked,but where is the engine i download it and there is no exe file ????

[Nemesis]

good morning

sorry when i asked,but where is the engine i download it and there is no exe file ????

Go here > Honey

[timetraveller]

Go here > Honey

thanks Janus
albeit every ordinary mortal loses the overview...
MichaelB do things in a big way...

[Nemesis]

Go here > Honey

thanks Janus
albeit every ordinary mortal loses the overview...
MichaelB do things in a big way...

One of my buddies asked which of the items in the menu of engine choices offered by MikeB he should use for game analysis of his ICCF games - I said this or rather displayed this

confused-1.jpg

[kramnik]

Stockfish Polyglot now is also for Android:

- Stockfish_Polyglot_2020-03-18_arm7-pgo for 32bit Andoid systems

- Stockfish_Polyglot_2020-03-18_arm8-pgo for 64bit Android systems

Compiles by summer soldier

[Scorpio]

>> http://abrok.eu/stockfish/

Author: Vizvezdenec
Date: Thu Apr 2 15:11:16 2020 +0200
Timestamp: 1585833076

Increase reduction for captures.

The idea behind this patch is that if static eval is really bad so capturing of current piece on spot will still produce a position with an eval much lower than alpha then our best chance is to create some kind of king attack. So captures without check are mostly worse than captures with check and can be reduced more.

passed STC
https://tests.stockfishchess.org/tests/view/5e8514b44411759d9d098543
LLR: 2.94 (-2.94,2.94) {-0.50,1.50}
Total: 46196 W: 9039 L: 8781 D: 28376 Elo +1.94
Ptnml(0-2): 750, 5412, 10628, 5446, 862

passed LTC
https://tests.stockfishchess.org/tests/view/5e8530134411759d9d09854c
LLR: 2.94 (-2.94,2.94) {0.25,1.75}
Total: 23462 W: 3228 L: 2988 D: 17246 Elo +3.55
Ptnml(0-2): 186, 2125, 6849, 2405, 166

close https://github.com/official-stockfish/Stockfish/pull/2612

bench 4742598

>> http://abrok.eu/stockfish/

[Nemesis]

Request to users of MikeB's Honey and Black Diamond who use either for corr analysis :

would you kindly post a copy of your params please - seems my friend has a problem with it - analyzes for just a few seconds then stops. (FritzGUI I think - W10).

[Gator007]

The author said Black Diamond or Honey are the best choices for analysis.

[ZamChess]

The author said Black Diamond or Honey are the best choices for analysis.

# MikeB » Fri Apr 03, 2020 5:09 am
===============================
"It depends on the position and how deep the mate is, how many pieces are left on the board...
Crystal and MateFinder by Joe Ellis are better at finding mates.

For human play - BlueFish is my favorite.

For analysis, Honey and Black-Diamond.

I use Stockfish for testing Honey and I hardly touch WeakFish or Blue Honey."

Nevermind, Honey XIr1 ist tactically very strong...

[Gator007]

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