Chess Engines Diary

Temp 3'+3" Intel Core i5-1035G1 7,9 GB GUI  Arena 3.5.1 Book  Perfect 2019 All JCER games 97.024 Table created  Scid vs PC JCER League Tournament:   240 games

Congratulations to the winners! 🥇 Combusken 1.1.0 - Author: Marcin Henryk Bartkowiak, 🥈 Spike 1.4 - Authors: Ralf Schäfer and Volker Böhm, 🥉 Barbarossa 0.5.0 - Author: Nicu Ionita. All files (games, tables and engines) -  download from page Temp 3'+3" Intel Core i7-4710MQ 7,9 GB GUI  Arena 3.5.1 Book  Perfect 2019 All JCER games 97.024 Table created  Scid vs PC JCER League Tournament:   240 games

Wasabi - UCI chess engine Configure your UCI client (e.g. PyChess, Arena, cutechess) … on Windows ⇒ to run wasabi.cmd … on Linux ⇒ to run wasabi Wasabi 1.3.0 - download

Stockfish - UCI chess engine, compiled by Stéphane Nicolet Rating JCER=3304 Timestamp: 1593376963 Scale down eval for queen imbalance We lower the endgame value of the evaluation when we detect that there  is only one queen left on the board (more precisely, we use a scale  factor of 37/64, or about 0.58, for the endgame part of the evaluation). Hopefully this helps a little bit for the assessment of positions with  queen imbalance, which are one of the well-known Stockfish weaknesses. STC: LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 21600 W: 4176 L: 3955 D: 13469 Elo +3.55 Ptnml(0-2): 351, 2457, 5003, 2598, 391 LTC: LLR: 2.97 (-2.94,2.94) {0.25,1.75} Total: 248328 W: 30596 L: 29720 D: 188012 Elo +1.23 Ptnml(0-2): 1544, 22345, 75665, 22911, 1699 Bench: 4441323 Stockfish 20062822 Nicolet  download

Badchess - UCI chess engine UCI  compliant chess engine in c, initially with VICE as a base and inspired by Stockfish, Ethereal, and Weiss. Author: Alex Pawelko ( Canada)/ Badchess 0.4.4 - download All files (games, tables and engines) -  download from page

Temp: 3'  182 games download ,  GUI - Chess Tournament, Tablet - Huawei MediaPad T3 10, 2GB RAM, all 4.912 games Best progress: Corchess 310520 +44 All files (games, tables and engines) - download from page

Congratulations to the winners! 🥇 Fridolin 3.10 - Author: Christian Sommerfeld, 🥈 Chronos 1.9.9 - Author: Guillermo Filia, 🥉 Betsabe II 1.96 - Author: Juan Benitez. All files (games, tables and engines) - download from page Temp 3'+3" Intel Core i5-8250U 7,9 GB GUI  Arena 3.5.1 Book  Perfect 2019 All JCER games 97.024 Table created  Scid vs PC JCER League Tournament:   240 games

Stockfish - UCI chess engine, compiled by Stefan Geschwentner Rating JCER=3304 Timestamp: 1593374709 Scale down eval for drawish rook endgames. STC: LLR: 2.96 (-2.94,2.94) {-0.50,1.50} Total: 82136 W: 15694 L: 15407 D: 51035 Elo +1.21 Ptnml(0-2): 1076, 8960, 20767, 9131, 1134 LTC: LLR: 2.93 (-2.94,2.94) {0.25,1.75} Total: 70200 W: 8787 L: 8440 D: 52973 Elo +1.72 Ptnml(0-2): 325, 5983, 22170, 6264, 358 Bench: 4478869 Stockfish 20062822Geschwentner  download

CFish - UCI chess engine, Rating JCER=3114 "CFish, a port of Stockfish written in plain C by Ronald de Man, first published on GitHub in July 2016. Possibly inspired by the asmFish project to speed up Stockfish using a programming language closer to the machine, the purpose of CFish is to explore possible optimization issues of C versus C++ compilers" [Chess Programming Wiki]. All files (games, tables and engines) -  download from page CFish 11 - download

BrainLearn - UCI chess engine Rating JCER=3168 BrainLearn 9 - download Te i inne silniki, jak również partie, tabele oraz książki debiutowe są do pobrania ze strony download na blogu Chess Engines Diary. Pliki są posortowane według alfabetu i spakowane w paczki.

Stockfish - UCI chess engine, compiled by Stéphane Nicolet Rating JCER=3304 Timestamp: 1593374590 Increase value of pawns on fifth rank This patch increases the endgame value of pawns on the fifth rank. The increase is very small (+1 evaluation point, about 0.005 pawn)  for the pawns on external columns (a-b-c-f-g-h) and a bit bigger  (+7 evaluation points, about 0.033 pawn) for the pawns on d5/e5. STC: LLR: 2.93 (-2.94,2.94) {-0.50,1.50} Total: 79864 W: 15331 L: 15027 D: 49506 Elo +1.32 Ptnml(0-2): 1336, 9284, 18433, 9498, 1381 https://tests.stockfishchess.org/tests/view/5ef73e2ef993893290cc0c47 LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 47240 W: 5927 L: 5630 D: 35683 Elo +2.18 Ptnml(0-2): 320, 4133, 14440, 4384, 343 https://tests.stockfishchess.org/tests/view/5ef7c0c4f993893290cc14b7 Bench: 4794633 Stockfish 20062822  download

ShashChes s - UCI chess engine. Rating JCER=3212 ShahChess derived from Stockfish family chess engines.  It's a pleasure to annonce the new ShashChess 12 release with a lot of novelties: -completely revised Shashin theory so that we reached a main goal of our development: the best tactical solver (better than Houdini tactical) without loosing in strength compared to Stockfish: no other button needed! Our tests results will follow. In particular, many thanks to JHellis and its latest Crystal derivative. No more contempt: it's integrated in Shashin theory and we have no rollcoaster effect: the score is truly aligned with the gui We demonstrated the effectiveness of Shashin theory at no fast time controls and there is yet a very large margin of improvement: a lot of discarded Stockfish community patches (thanks clearly for their immense work)can be well integrated thanks to Shashin theory, improving game play and/or hard positions management. -new Self Q-learning,

Release:  Verbose move stats now includes a line for the root node itself. Added optional alphazero time manager type for fixed fraction of remaining time per move. The WL score is now tracked with double pecision to improve accuracy during very long search. Fix for a performance bug when playing from tablebase position with tablebases enabled and the PV move was changing frequently. Illegal searchmove restrictions will now be ignored rather than crash. Policy is cleared for terminal losses to encourage better quality MLH estimates by reducing how many visits a move that will not be selected (unless all other options are equally bad) receives. Smart pruning will now cause leela to play immediately once mate score has been declared. Fix an issue where sometimes the pv reported wouldn't match the move that would be selected at that moment. Improvement for logic for when to disable custom_winograd optimization to avoid running out of video ram. --show-hidden can n

Temp 3'+3" Intel Core i5-1035G1 7,9 GB GUI  Fritz 17 Book  Perfect 2019 All JCER games 97.024 Table created  Scid vs PC JCER League Tournament:   132games All files (games, tables and engines) - download from page

Halogen - UCI chess engine Author: Kieren Pearson A c++ chess engine that implements Null-move pruning, Late move reductions, Quiessence search and a transposition table that uses Zobrist Hashing. New Features: Pawn hash table (1MB) Internal iterative deepening Extended futility pruning Triangular PV table Included makefile in /src/ to allow individuals to compile themselves using make Static exchange valuation Lazy SMP multi-threading with shared hash table Minor changes Added bishop pair bonus Tapered evaluation between mid and end game Adjust values of Knight and Rook based on the number of own pawns Improved time management for repeating / blitz time controls Fixed promotion-capture bug invalidating Zobrist hash Refactor code to allow pruning at root Don't allow null pruning to drop directly into quiescence search. Halogen 4.0 download All files (games, tables and engines) - download from page

9 chess engines: BrainFish 200626, Cfish 280620, CorChess 220620, Demolito 27-06-2020, Demolito 28-06-2020, Foxsee 4.0.0, Minic 2.38, OliThink 5.4.10, Stash 18.1. GUI - Banksia 0.30 ================================================   Full acces to the folder: CHESS ENGINES - about 3000 files! If you do not want to wait a long time for download donate a minimum of 15$, enter your email - you will gain full access to the folder with chess engines and games, tables, etc. My email: jotes@go2.pl

Congratulations to the winners! 🥇 CyberPagno 3.0 - Author: Marco Pagnoncelli, 🥈 Philou 3.71 - Author: Philippe Gailhac, 🥉 N2 - Author: Ralf Schaefer. Temp 3'+3" Intel Core i7-4710MQ 7,9 GB GUI  Arena 3.5.1 Book  Perfect 2019 All JCER games 97.024 Table created  Scid vs PC JCER League Tournament:   240 games

BanksiaGUI is a freeware chess Graphical User Interface. Changes v 0.30: Fixed bugs: Converted PGN books may have duplicate positions Some small improvements/adjustments New features:   Tournament: Human can join and play Lichess bot: challenge multi-players, repeatable Engine info panel: changeable font size Support UCI_ShowMovesLeft Banksia 0.30 download

FoxSEE - UCI chess engine Author: Zixiao Han  Rating JCER=2612 Updates: Enabled use of transposition table on PV nodes Improved search on extended branches Adjusted piece value to avoid obviously imbalanced endgames Improved mobility evaluation (inspiration from the Stockfish Evaluation Guide) FoxSEE 4.0.0 download All files (games, tables and engines) - download from page

OliThink is an open-source WB engine by Oliver Brausch MSYS2/MinGW static builds by T. Poppins Rating JCER=2741 OliThink 5.4.10 - download All files (games, tables and engines) -  download from page

Demolito - UCI chess engine Author : Lucas Braesch  Rating JCER=3046  (21 Place) Demolito 28-06-2020 download All files (games, tables and engines) -  download from page

CorChess is a clone of Stockfish maintained for better performance on long time controls, trying at least partially to fill the gap between regular tests and demands of correspondence players. Rating JCER=3245 CorChess 2020-06-22 - download All files (games, tables and engines) - download from page

CFish - UCI chess engine, Rating JCER=3114 "CFish, a port of Stockfish written in plain C by Ronald de Man, first published on GitHub in July 2016. Possibly inspired by the asmFish project to speed up Stockfish using a programming language closer to the machine, the purpose of CFish is to explore possible optimization issues of C versus C++ compilers" [Chess Programming Wiki]. All files (games, tables and engines) -  download from page CFish 2020-06-28 - download

Temp: 3'  132 games download ,  GUI - Chess Tournament, Tablet - Huawei MediaPad T3 10, 2GB RAM, all 4.912 games Best progress: Stockfish 170620 +48 All files (games, tables and engines) - download from page

Stash - UCI chess engine Author:  Morgan Houppin Rating JCER=2655 Stash 18.1 download All files (games, tables and engines) - download from page

Brainfish - UCI chess engine, JCER Rating=3270 From the author: Brainfish is a standard Stockfish chess engine extended by a general book format that is capable of handling a reduced part of Cerebellum, which is an innovative chess opening and playing book. In Brainfish, the book moves are only used in engine games, not in analysis mode. All moves in the published book Cerebellum_light.bin generated by Cerebellum were calculated by using Stockfish as analysis engine, without using statistics. Then those moves where recalulated by the Cerebellum Library using a graph algorithm that makes all scores in the library consistant. Consistant scores means for example, in case the starting position has a score of 0.2 and a best move is 1.e4, the position after 1.e4 must have the score -0.2. Additionally, some others properties are found, like the best main line of a position and possible Transitions. Hence, when Brainfish is playing moves that are in the Cerebellum book, it plays li