Chess engine: Berserk 11

Berserk - UCI chess engine ( written in C).

Author: Jay Honnold

Rating CEDR=3593 (7 place)

v.11:

What's Changed

Don't increase reductions for cutnodes when the move is tactical by @jhonnold in #417

Between search optimizations by @jhonnold in #418

Disable SE Extensions when clearly winning by @jhonnold in #419

Fast Range over modulo for TT indexing by @jhonnold in #420

Setup Pyrrhic submodule by @jhonnold in #421

Remove depth requirement on eval adjustment by @jhonnold in #422

Fix recapture extension extending non-captures by @jhonnold in #423

Introduce negative reductions when hash move is singular by @jhonnold in #424

Update Github Workflow to force Ubuntu 20.04 by @jhonnold in #425

Standard LMR + PVS Logic by @jhonnold in #426

Search Stack by @jhonnold in #428

Combined Patches by @jhonnold in #430

Cleanup by @jherrera80 in #429

MovePicker Refactor by @jhonnold in #433

Prevent positive score differences from impacting TM by @jhonnold in #435

12 Byte TT Entries by @jhonnold in #437

Accumulator Cleanup by @jhonnold in #438

QSearch ordering strictly based on Capture History by @jhonnold in #439

Utilize 128bit multiplication for TT indexing by @jhonnold in #440

Train with a mix of Berserk and Koivisto data by @jhonnold in #445

Track bestmove using "Root Moves" by @jhonnold in #446

Move Type in Continuation History by @jhonnold in #447

Add simple protections for search explosions due to extensions by @jhonnold in #448

History values fit within int16_t by @jhonnold in #449

Remove SF Chess960 Cornered Bishop Logic by @jhonnold in #450

General Cleanups by @jhonnold in #451

Speedups by @jhonnold in #452

Optimize Apply Updates by @jhonnold in #453

Additional continuation histoy for follow-follow up by @jhonnold in #454

Separate Move Pickers by @jhonnold in #455

Hold TT Entry by @jhonnold in #456

Increase hidden layer to 768 neurons by @jhonnold in #458

No TT eval correction in QSearch by @jhonnold in #459

Updates by @jhonnold in #460

Add PV TT Eval correction in QSearch by @jhonnold in #461

Identify upcoming repetitions by @jhonnold in #462

Add WDL Output and Normalize CP to 50% at 100cp by @jhonnold in #463

Utilize LMR Depth when move pruning quiets by @jhonnold in #465

History Pruning by @jhonnold in #466

Split Good and Bad captures with history and SEE by @jhonnold in #467

Individual statistics: Berserk 10-dev, 530 games (+133,=296,-101), 53.0 %

Fritz 17 : 2 (+ 1,= 1,- 0), 75.0 %

Raubfisch X48e : 8 (+ 0,= 7,- 1), 43.8 %

SugaR AI 2.50 : 8 (+ 0,= 6,- 2), 37.5 %

Dragon 2.6.1 : 2 (+ 0,= 2,- 0), 50.0 %

Stockfish 15 : 8 (+ 0,= 4,- 4), 25.0 %

Fisherov 0.98k : 6 (+ 0,= 6,- 0), 50.0 %

Lc0 0.29.0-rc0 : 8 (+ 1,= 7,- 0), 56.2 %

Arasan 23.3 : 2 (+ 0,= 2,- 0), 50.0 %

Hiarcs 15.5 : 4 (+ 2,= 2,- 0), 75.0 %

Caissa 0.5 NNUE : 2 (+ 1,= 1,- 0), 75.0 %

RofChade 3.0 : 2 (+ 1,= 1,- 0), 75.0 %

Fisherov chess monk SE : 10 (+ 0,= 6,- 4), 30.0 %

Slowchess 2.9 : 6 (+ 0,= 5,- 1), 41.7 %

Pedone 3.1 : 2 (+ 1,= 1,- 0), 75.0 %

Koivisto 8.13 : 12 (+ 3,= 9,- 0), 62.5 %

Fisherov chess monk 1.2 : 18 (+ 0,= 11,- 7), 30.6 %

EMAN 8.10 : 2 (+ 0,= 2,- 0), 50.0 %

FoxSEE 8.2 : 2 (+ 2,= 0,- 0), 100.0 %

Rebel 15.1 : 2 (+ 1,= 0,- 1), 50.0 %

Leorik 2.2 : 2 (+ 2,= 0,- 0), 100.0 %

Swordfish 15.3 : 4 (+ 0,= 3,- 1), 37.5 %

Dumb 1.10 : 2 (+ 2,= 0,- 0), 100.0 %

Kayra 1.5 : 6 (+ 0,= 5,- 1), 41.7 %

Lozza 2.4 : 2 (+ 2,= 0,- 0), 100.0 %

Blunder 8.5.5 : 4 (+ 4,= 0,- 0), 100.0 %

Nalwald 16 : 4 (+ 4,= 0,- 0), 100.0 %

ShashChess 23 : 10 (+ 0,= 7,- 3), 35.0 %

ProteusSF RBE 008c : 2 (+ 0,= 2,- 0), 50.0 %

Stockfish 130722 : 8 (+ 0,= 5,- 3), 31.2 %

BrainLearn 18 : 18 (+ 0,= 11,- 7), 30.6 %

Avalanche 1.1.0 : 6 (+ 6,= 0,- 0), 100.0 %

Caissa 0.8.0 : 8 (+ 7,= 1,- 0), 93.8 %

CorChess 250722 : 4 (+ 0,= 3,- 1), 37.5 %

EMAN 8.20 : 20 (+ 0,= 16,- 4), 40.0 %

StockNemo 4.0.0.1 : 8 (+ 8,= 0,- 0), 100.0 %

Stockfish 250722 Ivec : 4 (+ 0,= 2,- 2), 25.0 %

Fritz 18 : 4 (+ 3,= 1,- 0), 87.5 %

Maelstrom 1.0.1 : 6 (+ 6,= 0,- 0), 100.0 %

Stockfish 240722 Ivec : 4 (+ 0,= 4,- 0), 50.0 %

CorChess 240722 : 4 (+ 0,= 4,- 0), 50.0 %

Arasan 23.4 : 10 (+ 3,= 7,- 0), 65.0 %

Bagatur 3.5 : 2 (+ 2,= 0,- 0), 100.0 %

Stockfish 020822 Ivec : 2 (+ 0,= 2,- 0), 50.0 %

Virtue 2.3.0 : 2 (+ 2,= 0,- 0), 100.0 %

CorChess 020822 : 2 (+ 0,= 1,- 1), 25.0 %

Eubos 2.3 : 2 (+ 2,= 0,- 0), 100.0 %

Fire-zero 08032022 : 2 (+ 2,= 0,- 0), 100.0 %

Inanis 1.1.0 : 4 (+ 3,= 1,- 0), 87.5 %

Knightx 3.4 : 6 (+ 6,= 0,- 0), 100.0 %

Lumac0 13.2 : 3 (+ 3,= 0,- 0), 100.0 %

Alexandria 2.3.1 : 2 (+ 1,= 1,- 0), 75.0 %

Vault 0.4 : 2 (+ 2,= 0,- 0), 100.0 %

Viridithas 2.4.2 : 4 (+ 4,= 0,- 0), 100.0 %

CorChess 060822 : 8 (+ 0,= 6,- 2), 37.5 %

Ceibo 0.9 : 4 (+ 4,= 0,- 0), 100.0 %

Black Marlin 7.0 : 6 (+ 5,= 1,- 0), 91.7 %

ShashChess 23.1 : 4 (+ 0,= 3,- 1), 37.5 %

Blue Marlin 15.3 : 4 (+ 0,= 3,- 1), 37.5 %

Stockfish 060822 Ivec : 8 (+ 0,= 5,- 3), 31.2 %

RubiChess 20220813 : 10 (+ 2,= 8,- 0), 60.0 %

ShashChess 23.1.1 : 6 (+ 0,= 1,- 5), 8.3 %

Velvet 4.1.0 : 6 (+ 5,= 1,- 0), 91.7 %

Inanis 1.1.1 : 2 (+ 2,= 0,- 0), 100.0 %

Bagatur 3.6 : 2 (+ 2,= 0,- 0), 100.0 %

Flaming Titz 230822 : 4 (+ 0,= 3,- 1), 37.5 %

Wasp 6.00 : 8 (+ 2,= 6,- 0), 62.5 %

Ethereal 13.75 NNUE : 4 (+ 2,= 2,- 0), 75.0 %

Dragon 3.1 : 10 (+ 0,= 7,- 3), 35.0 %

Eman 8.20 : 14 (+ 0,= 9,- 5), 32.1 %

Revenge 3.0 : 8 (+ 0,= 6,- 2), 37.5 %

CorChess 130822 : 4 (+ 0,= 3,- 1), 37.5 %

ProteusSF 030822 : 8 (+ 0,= 7,- 1), 43.8 %

Blue Marlin 15.3a : 14 (+ 0,= 8,- 6), 28.6 %

Stockfish 150822 : 2 (+ 0,= 1,- 1), 25.0 %

Swordfish 15.3a : 6 (+ 0,= 3,- 3), 25.0 %

Minic 3.27 : 2 (+ 0,= 2,- 0), 50.0 %

Stockfish 170822 : 4 (+ 0,= 1,- 3), 12.5 %

Seer 2.5.0 : 6 (+ 0,= 6,- 0), 50.0 %

Minic 3.28 : 6 (+ 2,= 4,- 0), 66.7 %

Teal Oracle : 2 (+ 0,= 1,- 1), 25.0 %

BigBallz 010922 : 4 (+ 0,= 3,- 1), 37.5 %

ShashChess 24 : 8 (+ 0,= 7,- 1), 43.8 %

Kayra 1.5 Dynamics : 8 (+ 0,= 6,- 2), 37.5 %

Fire-zero 09022022 : 1 (+ 1,= 0,- 0), 100.0 %

Stockfish 070922 : 4 (+ 0,= 3,- 1), 37.5 %

CorChess 170822 : 8 (+ 0,= 5,- 3), 31.2 %

ProteusSF Piranha 220904 : 6 (+ 0,= 3,- 3), 25.0 %

Minic 3.30 : 6 (+ 5,= 1,- 0), 91.7 %

Booot 7.0 : 4 (+ 2,= 2,- 0), 75.0 %

Polyfish 220826 : 4 (+ 0,= 2,- 2), 25.0 %

Stockfish 170922 : 4 (+ 0,= 3,- 1), 37.5 %

CorChess 170922 : 2 (+ 0,= 1,- 1), 25.0 %

Ethereal 13.88 : 4 (+ 2,= 2,- 0), 75.0 %

Lc0 0.30.0-dev+git.6d9bd9d : 2 (+ 0,= 1,- 1), 25.0 %

Dark Sister 1.9 : 2 (+ 0,= 1,- 1), 25.0 %

Fire-zero 09202022 : 2 (+ 2,= 0,- 0), 100.0 %

Kayra 1.6 : 2 (+ 0,= 1,- 1), 25.0 %

Koivisto 8.16 : 6 (+ 0,= 6,- 0), 50.0 %

Kayra 1.5 Attack : 2 (+ 1,= 1,- 0), 75.0 %

Stockfish 290822 : 2 (+ 0,= 1,- 1), 25.0 %

Uralochka 3.38c : 4 (+ 4,= 0,- 0), 100.0 %

Slowchess 2.7 : 2 (+ 1,= 1,- 0), 75.0 %

Caissa 1.0 : 2 (+ 2,= 0,- 0), 100.0 %

Berserk 11 download

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