Chess Engines Diary

  💾   150 games from the tournament download   @chessenginesdiary 🕓 Time 3'+3" 💻Dell G15 SE, i7-11800H RAM 16,0 GB 🖬 GUI-Fritz 17 Country - Poland, City -  Malbork 💾 All CEDR games  156.485 games download (3'+3")  P Engine Score 1: Cool Iris 11.10_m 25.0 / 50 2: Patzer AI 220823_bmi2 25.0 / 50 3: CorChess 4, dev-20230824-2ff7d0 25.0 / 50 4: Fisherov chess monk 1.2 bmi2 25.0 / 50 5: Sun 1.0 2560-bmi2 25.0 / 50 6: Stockfish 16 25.0 / 50

Since some readers asked for tests on older computers, today's tournament on a 10-year-old computer. It was cleaned and updated by our collaborator Tedi. 💾   210 games from the tournament download   @chessenginesdiary 🕓 Time 3'+3" 💻Acer Aspire E1-570, Intel Core i3-3217U 3,9 GB Memory Windows 10 🖬 GUI-Arena Country - Poland, City -  Malbork 💾 All CEDR games  156.485 games download (3'+3")  P Engine CEDR Score Chg +/-/= 1: Arasan 24 3488 25.0 / 28 +17 (+22 -0 =6) 2: Clover 6.0 3541 24.5 / 28 +8 (+22 -1 =5) 3: Velvet 5.3.0 3450 22.5 / 28  -3 (+18 -1 =9) 4: BlackMarlin 8.0 3389 22.0 / 28 +3 (+19 -3 =6) 5: Critter 1.6a 3200 19.5 / 28 +14 (+16 -5 =7) 6: Demolito 2023-08-03 3226 17.5 / 28 -11 (+14 -7 =7) 7: Nalwald 18 3249 17.0 / 28 -22 (+13 -7 =8)

Peacekeeper - UCI engine Author: Kyle Zhang  Rating CEDR=3000 v.1.71: Various FRC bugs resulting in crashes and illegal moves were fixed in this version. There should be an insignificant strength difference from v1.70 in standard chess. Peacekeeper rating CEDR progress: Pl Engine Rating Score Games % 861 Peacekeeper 1.60 3000.1 83.50 140 59.64 947 Peacekeeper 1.50 2846.4 37.00 107 34.58 955 Peacekeeper 1.4 2829.9 7.00 34 20.59 1018 Peacekeeper 1.2 2737.1 15.00 94 15.96 1033 Peacekeeper 1.40 2718.5 19.50 76 25.66 1108 Peacekeeper 1.3 2585.5 34.00 129 26.36 1131 Peacekeeper 1.1 2543.0 25.00 98 25.51 1167 Peacekeeper 1.01 2476.5 15.00 64 23.44 1199 Peacekeeper 1.0 2416.6 13.50 110

Wahoo - UCI chess engine  Rating CEDR=2982 Author: Andrew Hockman v.4.0.0: Estimated Elo 3000 CCRL 40/15 ELO   | 256.55 +- 9.83 (95%) CONF  | 8.0+0.08s Threads=1 Hash=32MB GAMES | N: 5024 W: 3502 L: 346 D: 1176 https://chess.swehosting.se/test/3641/ ELO   | 232.69 +- 13.03 (95%) CONF  | 40.0+0.40s Threads=1 Hash=128MB GAMES | N: 2500 W: 1634 L: 172 D: 694 https://chess.swehosting.se/test/3640/ Author's Note During my time spent developing version 4 I became very interested in king safety evaluation features, and as a result dramatically shifted the way that Wahoo plays. Based on my observations, it does a much better job of keeping its own king safe, while also exploiting enemy weaknesses much more cleanly. I also developed an experimental version that replaced HCE king safety with a small neural network. I may release this version separately at some point in time, as it did result in an improvement of some 24ish Elo. New Engine Features Use More Increment: +6 Elo #118 Use TT Score

This project is a chess engine called " Mida " built entirely in C++. The engine is built to work with UCI (Universal Chess Interface), and you can easily find all the commands online. Rating CEDR=2586 v2.0: Introducing NNUE evaluation Delta pruning Fixed bug in null move pruning Mida 2.0 download

  Pingu -  UCI compatible chess engine built from scratch. Author: William Ching Features c02e5dd: PIN-3/optimise-stalemate-detection (#65) (William Ching) #65 Pingu 1.0.0 download

Shen Yu -  UCI chess engine written from scratch in rust. It is an original work, but takes inspiration from many other engines. Shen Yu is currently in active development.   Author: Aaron Li  Rating CEDR=2271 v.2.0.0: Total rewrite, added pruning. Rough estimate of 2400-2500, more testing is needed to confirm. Shen Yu 2.0.0 download

Protej - UCI chess engine,  Author - Alex Brunetti Rating CEDR=2895 Protej progress: version    CEDR games % Protej 0.6.4  2895 303 31.0 Protej 0.6.2 2869 133 39.5 Protej 0.6.3 2769 462 43.8 v.0.6.5: Protej 0.6.5_dev_a Piece-square table code optimized and values tuned. 2023-08-27 STC Total: 26800 W: 10619 L: 10616 D: 5565 Elo: +2; LTC (CCRL Blitz estimated) scaled: +19 Protej 0.6.5_dev_b Null move reduction code reengineered. 2023-08-28 STC Total: 15400 W: 6220 L: 6046 D: 3134 Elo: +5; LTC (CCRL Blitz estimated) scaled: +1 Protej 0.6.5_dev_c Late move reductions code reengineered and values tuned. 2023-08-29 STC Total: 26000 W: 11809 L: 8776 D: 5415 Elo: +44; LTC (CCRL Blitz estimated) scaled: +23 Individual statistics:Protej 0.6.1 - 64 games (+ 28,= 10,- 26), 51.6 % GreKo 2021.08 NNUE            :   2 (+  0,=  0,-  2),  0.0 % Barbarossa 0.6.0              :   2 (+  1,=  1,-  0),

CT800 - UCI chess engine,  About: I am Rasmus Althoff, main author of this project. My professional background is electrical engineering and embedded systems. You can reach me via e-mail at info@ct800.net – in English or German. Actually, I just wanted to gain some hands-on experience with ARM Cortex-M microcontrollers. The Olimex H405 board looked promising, so I needed a project idea what to do with this powerful hardware: artwork with a chessboard on a computer chip Chess computers have fascinated me since the late ’80s. Back then, I was wondering how such a machine might work, and now with my own chess computer, a dream has come true! Rating JCER=2660    Author: Rasmus Althoff Changes from V1.44 Added more options for the operator time bonus in tournament and game-in modes. Added fade-out option for automatic backlight mode. Added option for display brightness. Removed wrap-around for numeric parameters in the menu. Added support for the Gigadevice GD32F405 controller which is

  💾   306 games from the tournament download   @chessenginesdiary 🕓 Time 3'+3" 💻HP ENVY i5-8250U 8GB RAM 🖬 GUI-Fritz 15 Country - Poland, City -  Malbork 💾 All CEDR games  156.485 games download (3'+3")  P Engine Score +/-/= 1: Cool Iris 11.10 19.5 / 34 (+5 -0 =29) 2: TACTICAL 220823 19.5 / 34 (+5 -0 =29) 3: Stockfish dev-20230824-4c4cb1 19.5 / 34 (+5 -0 =29) 4: CorChess dev-20230824-2ff7d0 19.0 / 34 (+4 -0 =30) 5: Stockfish 220823 sl 19.0 / 34 (+4 -0 =30) 6: Stockfish 250823 sl 19.0 / 34 (+4 -0 =30) 7: Sun 1.0 2560 19.0 / 34 (+4 -0 =30) 8: Stockfish 16 19.0 / 34 (+4 -0 =30) 9: Sun 1.0 19.0 / 34 (+4 -0 =30) 10: Stockfish-PLB 240823 19.0 / 34

💾   684(!) games from the tournament download   @chessenginesdiary 🕓 Time 3'+3" 💻HP Pavilion i5-1035G1 8GB RAM 🖬 GUI-Banksia Country - Poland, City -  Malbork 💾 All CEDR games  156.485 games download (3'+3")  Tech table: Engine KN/mov NPS des/mov time/mov mov/game time/game fail s Chess-System-Tal-2.00 5265 947329 22.6 5.6 53.2 295.9 Rebel EAS 4678 857890 22.2 5.5 56.9 310.3 Cool Iris 11.10 4111 784802 32.7 5.2 50.7 265.7 CorChess 150823 Dimension 2048 4791 779721 30.4 6.1 49.1 301.6 CorChess dev-20230824 5596 910478 33.1 6.1 48.5 298.2 FireBird 2.1 18238 2887989 18.9 6.3 47.9 302.2 Patzer AI 220823 4062 760513 38.2 5.3 47.3 252.7 Raid 2.73 4943 930131 37.8 5.3 45.9 243.7 SF-Pro 23-08.2023 3449 591133 38.6 5.8 48.4 282.2 1 Shallow 5 5805 1362398 14.2 4.3 43.0 183.4 Stockfish 220823 sl 4774 913552 37.4 5.2 50.3 263.0 Stockfish 220823 sl x2560 4361 824040 37.6 5.3 48.6 257.1 Stockfish 250823 sl 5089 1011613 40.5 5.0 52.7 265.3

Peacekeeper - UCI engine Author: Kyle Zhang  Rating CEDR=2327 v.1.70: This release includes many small tweaks and bugfixes to perfect HCE (hand-crafted evaluation). Some of the large changes include: Updating bestmove on aspiration fail-high Adjusting time control Making negamax fail-soft (was a bug) Adding LMP FRC (Fischer Random Chess) and DFRC have also been implemented. This release is 119 elo stronger in selfplay, and 104 elo stronger in a gauntlet against other opponents of similar strength. ELO   | 119.11 +- 12.67 (95%) CONF  | 5.0+0.05s Threads=1 Hash=8MB GAMES | N: 2000 W: 977 L: 317 D: 706 Based on the strength gains, v1.70 should have a blitz elo of about 3110, and LTC elo of 3030. Peacekeeper 1.70 for Android download Look: Peacekeeper 1.70 for Windows

Stockfish - UCI chess engine, compiled by Rafik Author: I compiled last Stockfish source. I wanted to actively participate in this section, but it is not easy because already everything is possible to find it here  hence my idea to simply implement Polybook and Live Book support. I don't know if I had a good idea, but if you find this little initiative, of mine interesting I might keep this engine  updated with Stockfish Development Versions. Stockfish-PLB (Polybook - Live Book) release data 24 Aug. 2023 Rating CEDR=3719 Individual statistics:  Stockfish dev-20230503 Ivec - 234 games (+103,=131,-  0), 72.0   % Critter 1.6a                  :  10 (+  8,=  2,-  0), 90.0 % Hiarcs 15.5                   :   2 (+  1,=  1,-  0), 75.0 % Fisherov chess monk 1.2       :  10 (+  0,= 10,-  0), 50.0 % Crystal 5 KWK                 :   2 (+  0,=  2,-  0), 50.0 % Stockfish 15.1                :  14 (+  0,= 14,-  0), 50.0 % Dragon 3.2                    :   2 (+  1,=  1,-  0), 75.0 % Cha