Chess Engines Diary

Raid - is a stockfish derivative also supports polybook and EXP file attached. Rating CEDR=3722 Individual statistics: Raid v1 - 54 games (+ 27,= 27,-  0), 75.0 % Critter 1.6a                  :   4 (+  2,=  2,-  0), 75.0 % Fisherov chess monk 1.2       :   2 (+  0,=  2,-  0), 50.0 % Stockfish 15.1                :   4 (+  0,=  4,-  0), 50.0 % Rebel 16.2                    :   2 (+  1,=  1,-  0), 75.0 % Wasp 6.50                     :   2 (+  1,=  1,-  0), 75.0 % Stockfish dev-20230503 Ivec   :   4 (+  0,=  4,-  0), 50.0 % Polaris 1.6.1                 :   2 (+...

Tofiks - UCI chess engine Rating CEDR=2265 v .1.2.0: It's not as major of a change as from 1.0 to 1.1 but still plenty of things have changes and without waiting for a year. I started development on a more robust test-suite. If I can think of any testable scenario to test I add it. It currently validates if a PV output by the engine is consists of valid moves (in response to a bug). It tests some basic mate positions. Also verifies the move generator against known perft positions. I also focused on things like optimization. There were attempts made to make the make-unmake more efficient. Now it is simply done via copy-make principle. Where the current position is copied a move is made and if it needs to be taken back the position if overwritten with the copy. The idea was to save some irreversible changes (castling rights, captured pieces) and unmake the move based on the current board position, the move and the saved irreversible state. Initial testing showed a serious performance...

Demolito - UCI chess engine Author : Lucas Braesch  Rating CEDR=3213 v.2023-08-20: - remove endgame extension - increase noise Rating CEDR progres - Demolito Pl Engine Rating Score Games % 787 Demolito 2023-07-09 3213.8 190.50 309 61.65 791 Demolito 2021-10-21 3203.9 165.50 331 50.00 812 Demolito 2020-06-24 3172.0 4.50 20 22.50 814 Demolito 2023-08-03 3171.8 200.50 468 42.84           Demolito 2023-08-20 download

Lux - UCI chess engine Lux -  is the chess engine dev's Library of Alexandria. Definitely go check it out. Libraries  Chess package for C++: https://github.com/Disservin/chess-library Other Engine Insiprations [antikythera](https://github.com/0hq/antikythera) [Bit-Genie](https://github.com/Aryan1508/Bit-Genie) [Blunder](https://github.com/algerbrex/blunder) [Rice](https://github.com/rafid-dev/rice) And of course, [Stockfish](https://github.com/official-stockfish/Stockfish) v.3.2:   Search Upgrades  AlphaBeta Negamax  Quiescence Search  Transposition Table  Aspiration Window  Principal Variation Search  Reverse Futility Pruning  Null Move Pruning  Late Move Reduction  Check Extensions Eval Upgrades  Material Score  Piece-Square Tables Move Ordering Upgrades  TT-Move  MVV-LVA  History Heuristic  Killer Moves  Promotions Lux 3.2 download

Chers , is a chess engine written in Rust. The engine uses: - BitBoards to represent the board (although not yet using their potential for ray generation) - the UCI protocol to communicate with the GUI - iterative deepening as a time management strategy and base for the alpha-beta search - captures first move ordering Resources / Credits - Chers is heavily inspired by [rustic](https://github.com/mvanthoor/rustic), which also helped with its great [wiki](https://rustic-chess.org/) - [Chess Programming Wiki](https://www.chessprogramming.org/Main_Page) - [Chess programming Reddit](https://www.reddit.com/r/chessprogramming/) Chers 0.6.1 download

Caissa - UCI chess engine,  Author: Michał Witanowski Rating CEDR=3557 v.1.13: Changes New neural net trained on 3.5B positions Use threats in history heuristics (based on Berserk) Average base score used for aspiration windows Embed neural network in executable Switch from MSVC to GCC compiler for Windows release Elo gain Book=UHO_4060_v2, TC=40+0.4 Score of Caissa 1.13 AVX2 vs Caissa 1.12 AVX2: 459 - 325 - 877  [0.540] 1661 ...      Caissa 1.13 AVX2 playing White: 450 - 6 - 376  [0.767] 832 ...      Caissa 1.13 AVX2 playing Black: 9 - 319 - 501  [0.313] 829 ...      White vs Black: 769 - 15 - 877  [0.727] 1661 Elo difference: 28.1 +/- 11.5, LOS: 100.0 %, DrawRatio: 52.8 % Book=DFRC, TC=8+0.08 Score of Caissa 1.13 AVX2 vs Caissa 1.12 AVX2: 326 - 231 - 773  [0.536] 1330 ...      Caissa 1.13 AVX2 playing White: 229 - 64 - 372  [0.624] 665 ...      Caissa 1.13 AVX2 playing B...

  💾   182 games from the tournament download   @chessenginesdiary 🕓 Time 3'+3" 💻Dell G15 SE, i7-11800H RAM 16,0 GB 🖬 GUI-Aquarium Country - Poland, City -  Malbork 💾 All CEDR games  175.973 games download (3'+3")   P Engine CEDR Score Yu Co SF St TA Ra St Fi Co Be Pa St Ru St Chg +/-/= 1: Yuli GM PrO 9.0 3713 17.0 / 26 XX == == == == 1= =1 == 1= 10 == 11 1= 11 +29 (+9 -1 =16) 2: Cool Iris 11.20 3721 15.5 / 26 == XX =1 == == =0 == == == =1 =1 == 1= 11 +13 (+6 -1 =19) 3: SF-PRO 17092023 3728 15.5 / 26 == =0 XX == == == == =1 1= == 1= == =1 11 +10 (+6 -1 =19) 4: Stockfish 16 3708 15.0 / 26 == == == XX =1 == == == == == =1 == == 11 +10 (+4 -0 =22) 5: TACTICAL 150923 3725 14.5 / 26 == == == =0 XX == == == == 1= == 0= 11 11 +0 (+5 -2 =19) 6: Raid 2.75 Recon 3730 14.0 / 26 0= =1 == == == XX ...

  💾   342 games from the tournament download  @chessenginesdiary 🕓 Time 3'+3" 💻Lenovo Z710 i7-4710MG 8GB RAM 🖬 GUI-Arena Country - Poland, City -  Malbork 💾 All CEDR games  175.973 games download (3'+3")   P Engine CEDR Score Chg +/-/= 1: RubiChess 20230918 3610 34.0 / 36 +22 (+32 -0 =4) 2: Texel 1.09 3334 30.0 / 36 +14 (+25 -1 =10) 3: MrBob 1.2.0 3290 28.5 / 36  +7 (+25 -4 =7) 4: Nalwald 18 3288 28.0 / 36 +4 (+24 -4 =8) 5: Tucano 11.00.1 3382 27.5 / 36 -18 (+24 -5 =7) 6: Pawn 1.0 3246 26.5 / 36 +0 (+22 -5 =9) 7: Protej 20230919a 2917 21.0 / 36 +22 (+17 -11 =8) 8: Sting-sf Black Hole 5 3167 21.0 / 36 -40 (+17 -11 =8) 9: LTCh...

  TACTICAL is a clone engine of SF it uses the Tactical code that Mr. Zerbinati. Rating CEDR=3725 The difference is that it's built on Vondele's idea. Generates experience file and accepts bin and CTG opening books. Tactical - rating CEDR progres: Pl Engine Rating Score Games % 91 TACTICAL 010823 3725.0 208.50 344 60.61 110 Stockfish_Tactical 3723.0 40.00 62 64.52 117 TACTICAL 110823 3722.2 55.00 94 58.51 145 TACTICAL 070823 3720.0 48.00 94 51.06 217 TACTICAL 220823 3715.4 128.50 224 57.37 270 TACTICAL 240723 3712.4 58.50 98 59.69 326 TACTICAL 120723 3707.2 78.50 122 64.34 451 TACTICAL 160723_m 3683.9 41.50 54 76.85 TACTICAL 280923  download