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Stockfish 17092916 - new version!

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Stockfish , chess engine UCI Rating JCER = 3401 🔬 Author: Joost VandeVondele More: Timestamp: 1506695952  Measure nodes after search finished.  Only affects nmpsec in the multithreaded case.  No functional change.  ⭐⭐⭐   Stockfish 17092916 - download

Chess engine: Zorgus

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Zorgus  - UCI/Winboard chess engine. This chess engine is based on the work of George Georgopoulos and Tom Kerrigan. Homepage Author - Olivier de Lannoy Zorgus - download

Chess engine: Cfish 300917

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Rating JCER=3339 Cfish 300917 - download

Chess engine: Shallow 1.0.3

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Shallow 1.0.3 download Author - Dmitry Sultanov Rating JCER=2268

Chess engine: Sf290917MZ

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Author - Marco Zerbinati   Sf290917MZ - download

Chess engine: Marvin 2.2.0

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Marvin - Winboard/UCI chess engine Rating JCER=2402 Homepage Author - Martin Danielsson Marvin 2.2.0 - download

Jurek Chess Engines Rating 01.10.2017

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All list - pdf file     51.250 games JCER - download

Shark 170827bf wins JCER Test Tournament, 2017.09.21 - 2017.09.29

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Temp 3' + 3" Hardware: Intel Core i3-3217U CPU 3,9 GB Memory , Windows 10 x64 924 Tournament games , GUI- Arena 3.5.1 ,  161.651 JCER games ,  until 31.12.2016   45.406 JCER games (from 01.01.2017)  JCER League Book: Perfect 2017 ,   Table created - Scid vs PC

Chess engine: Symphysodon 290917

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Symphysodon 290917 - download Rating JCER=3389 Author - Jose Perez

Chess Engine: BrainFish 170923 and book: Cerebellum Light 170925

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BrainFish - UCI chess engine Information 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 like Stock

SugaR XPrO 280917 - very strong chess engine!

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Sugar - UCI chess engine Author - Marco Zerbinati  JCER=3370 SugaR XPrO 280917 - download

Chess engine: Rubichess 0.5TM

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Rubichess 0.5TM - download

Chess engine: Dimitri 3.81

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Dimitri - winboard chess engine Homepage Author - Luigino Viscione JCER rating=2151 Dimitri 3.81 - download

Chess engine: asmFish 250817-tactic

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JCER Rating=3409 ⏭ asmFish 250817-tactic - download

Stockfish 17092216 - new version!

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Stockfish , chess engine UCI Rating JCER = 3427 🔬 Author: GuardianRM More: Timestamp: 1506091688  Tweak statScore condition  The first change (ss->statScore >= 0) does nothing.  The second change ((ss-1)->statScore >= 0 ) has a massive change.  (ss-1)->statScore is not set until (ss-1) begins to apply LMR to moves.  So we now increase the reduction for bad quiets when our opponent is  running through the first captures and the hash move.  STC  LLR: 2.95 (-2.94,2.94) [0.00,4.00]  Total: 57762 W: 10533 L: 10181 D: 37048  LTC  LLR: 2.95 (-2.94,2.94) [0.00,5.00]  Total: 19973 W: 2662 L: 2480 D: 14831  Bench: 5037819  ⭐⭐⭐   Stockfish 17092216 - download

Chess Engines E - update

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Chess Engines E (100 engines) - download

Sayuri 2017.09.26 - new version chess engine UCI

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Sayuri - UCI chess engine Author - Hironori Ishibashi Rating JCER=1834 ⏭ Sayuri 2017.09.26 download

Sabrina 3.0.23 - new version chess engine!

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Sabrina - winboard chess engine Sabrina - changed the name "Satana" to "Sabrina".  Author - Stefano Gemma Homepage Rating JCER=1217 Sabrina 3.0.23 download

Chess22k 1.5 wins 4 League JCER, edition 05/2017, 2017.09.20 - 2017.09.28

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Temp 3' + 3" Hardware: Intel Core i7-4710MQ with 7,9 GB Memory , Windows 10 64-bit 924 Tournament games , GUI- Arena 3.5.1 ,  161.651 JCER games ,  until 31.12.2016   45.406 JCER games (from 01.01.2017)  JCER League Book: Perfect 2017 ,     Games, engines, book - download        Table created - Scid vs PC

Jumbo 0.5.3 - winboard chess engine. New version!

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Jumbo - winboard chess engine Important notes: The Win64 binary was built using CygWin GCC 5.4.0 and requires the following DLLs that are part of the CygWin installation: cyggcc_s-seh-1.dll cygstdc++-6.dll cygwin1.dll Rating JCER=2199 Author - Sven Schüle, Berlin (Germany) ⏯ Jumbo 0.5.3 - download

SugaR XPrO 1.3 - very strong chess engine!

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Sugar - UCI chess engine Author - Marco Zerbinati  JCER=3370 SugaR XPrO 1.3 - download

Amoeba 2.6 - UCI chess engine. New version!

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Amoeba - UCI chess engine (D language) Rating JCER=2664 ➽ Amoeba 2.6 - download

Fire 6.1 - new version best UCI chess engines!

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Fire - UCI chess engine author compilation - by Norman Schmidt Rating JCER=3164 Fire 6.1 download

Only for donors added: 54 chess engines and book

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Only for sponsors added 53 chess engines (folder: ChessEnginesFree): andscacs0.92.7z Aristides_v2.0d_010917.7z BrainFish_170831.7z bullitchess_1.0.7z cheese-1.91.7z ChessBrainVB_V3_50.7z CorChess_1.8_070917_x32-x64.7z demolito_20170826.7z DirtyBit.0.39.5.t5.7z EnkoChess-010917.7z Ethereal8.27.7z Fire_6.7z galjoen_v0.36.0.1.7z ISA 2_0_48.7z Joker 0.7.7.7z Klasman Father.7z McBrain2.7.7z Monolith_03.7z Nemorino_3.04_win64.7z Orka 170917.7z Raubfisch ME262_GTZ13b.7z Raubfisch ME262_GTZ15.7z Raubfisch ME262_GTZ15a.7z Raubfisch ME262_GTZ15b..7z Raubfisch X36.7z Raubfisch X36a.7z Raubfisch X36b.7z RuFuS yz-r01.7z RuFuS yz-r02.7z RuFuS yz-r03.7z ruydos 1.0.27.7z sctr_1.0.7z Sf030817MZ.7z SF-McBrain27.zip Shark 170827 x64 bf.7z Shark 170917 bf.7z stockfish_17082611.7z stockfish_17083015.7z stockfish_17083108.7z stockfish_17090120.7z stockfish_17090120_costalba.7z stockfish_17090120b.7z stockfish_17090209.7z stockfish_17090510.7z stockfish_17090510_syzygy.7z stockfish_17090912.7z stockfish_1

Free chess engines - download update

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G2- 145 chess engines asmFish - 39 files

Fire 6.0 - new version best UCI chess engines!

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Fire - UCI chess engine author compilation - by Norman Schmidt Rating JCER=3164 Fire 6.0 download

Chess engine: Monolith 0.3

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Monolith - UCI chess engine Author - Jonas Mayr Rating JCER=1406 Monolith 0.3 - download

Chess engine: Joker (2) 0.7.7

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Joker (2) - UCI chess engine Author - Manlio Morini Joker (2) 0.7.7- download

Chess engine: Dirty-Bit 0.39

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Dirty-Bit - UCI chess engine Author - Andrew Backes Dirty-Bit   0.39 - download

Raubfisch ME262 GTZ15 wins JCER Test Tournament, 2017.09.14 - 2017.09.18

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Temp 3' + 3" Hardware: Intel Core i3-3217U CPU 3,9 GB Memory , Windows 10 x64 480 Tournament games , GUI- Arena 3.5.1 ,  161.651 JCER games ,  until 31.12.2016   45.406 JCER games (from 01.01.2017)  JCER League Book: Perfect 2017 ,   Table created - Scid vs PC

Shark 170917bf (has Cerebellum book integrated in exe file.)

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Previous version chess engine Shark  Rating JCER=3395 Shark 170917bf download

Texel 1.07a35 - UCI Chess engine. New version

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Texel - UCI Chess engines Author - Peter Osterlund Rating JCER=2979 (19 place in Super League) Texel 1.07a35 download

Stockfish 17091710 - new version!

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Stockfish, chess engine UCI Rating JCER = 3427 🔬 Author: Syzygy  More: Timestamp: 1505637850  Let ss->ply denote the number of plies from the root to the current node  This patch lets ss->ply be equal to 0 at the root of the search.  Currently, the root has ss->ply == 1, which is less intuitive:  - Setting the rootNode bool has to check (ss-1)->ply == 0.  - All mate values are off by one: the code seems to assume that mated-in-0  is -VALUE_MATE, mate-1-in-ply is VALUE_MATE-1, mated-in-2-ply is VALUE_MATE+2, etc.  But the mate_in() and mated_in() functions are called with ss->ply, which is 1 in  at the root.  - The is_draw() function currently needs to explain why it has "ply - 1 > i" instead  of simply "ply > i".  - The ss->ply >= MAX_PLY tests in search() and qsearch() already assume that  ss->ply == 0 at the root. If we start at ss->ply == 1, it would make more sense to  go up to and including ss->pl

Orka 170917 (Stockfish clone) - new version

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Previous version chess engine Orka  Rating JCER=3367 Orka 170917 - download

Stockfish 17091710 - new version!

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Stockfish , chess engine UCI Rating JCER = 3427 🔬 Author: Stéphane Nicolet  More: Timestamp: 1505634747  Score unopposed weak pawns only if majors  Do not use the opposed flag for scoring backward and isolated pawns  in pawns.cpp, instead give a S(5,25) bonus for each opponent unopposed  weak pawns when we have a rook or a queen on the board.  STC run stopped after 113188 games:  LLR: 1.63 (-2.94,2.94) [0.00,5.00]  Total: 113188 W: 20804 L: 20251 D: 72133  LTC:  LLR: 2.95 (-2.94,2.94) [0.00,5.00]  Total: 66673 W: 8672 L: 8341 D: 49660  This is Alain Savard's idea, just with a different bonus.  Bench: 6259498  ⭐⭐⭐    Stockfish 17091709 - download

Nemorino 3.04 - UCI chess engine. New version!

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Nemorino - UCI chess engine Author - Christian Günther Home page Rating JCER=2901 Nemorino 3.04 download

Roc 0.8 wins 3 League JCER edition 05/2017, 2017.09.11 - 2017.09.20

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Temp 3' + 3" Hardware: Intel Core i7-4710MQ with 7,9 GB Memory , Windows 10 64-bit 924 Tournament games , GUI- Arena 3.5.1 ,  161.651 JCER games ,  until 31.12.2016   45.406 JCER games (from 01.01.2017)  JCER League Book: Perfect 2017 ,     Games, engines, book - download        Table created - Scid vs PC

Free chess engines - download update

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Update: S2 - 66 chess engines S5- 33 chess engines Shark - 34 chess engines

Chess engine: Raubfisch ME262 GTZ15b

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Raubfisch is an engine derived from Stockfish and Torpedo 1.1 XJR (private engine by Frank Karl Werner and Max Fehler) Rating JCER - 3341 Raubfisch ME262 GTZ15b - download

Cheese 1.91 - UCI chess engine (Windows, Mac, Android and Linux). New version!

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Cheese  - UCI chess engines Homepage Rating  JCER =2536 Author - Patrice Duhamel Cheese 1.91 download

Andscacs 0.92 - UCI chess engine. New version!

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Andscacs - UCI chess engine   Author - Daniel Jose Queralto  Home page  JCER rating old version: = 3102 Andscacs 0.92 download

Stockfish 17091212 - new version!

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Stockfish , chess engine UCI Rating JCER = 3427 🔬 Author: Ilvec More: Timestamp: 1505212313  Higher Move Overhead  This shoudl reduce time losses experienced by  users after new time management code.  Verified for no regression in very short TC (4sec + 0.1)  LLR: 2.95 (-2.94,2.94) [-3.00,1.00]  Total: 35262 W: 7426 L: 7331 D: 20505  Bench 5322108  ⭐⭐⭐   Stockfish 17091212 - download

Chess engine: Raubfisch X36b

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Raubfisch is an engine derived from Stockfish and Torpedo 1.1 XJR (private engine by Frank Karl Werner and Max Fehler) Rating JCER - 3341 Raubfisch X36b - download

Stockfish 17090912 - new version!

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Stockfish , chess engine UCI Rating JCER = 3427 🔬 Author: Ianfab More: Timestamp: 1504952614  Extend ShelterWeakness array by dimension isKingFile  Use different penalties for weaknesses in the pawn shelter  depending on whether it is on the king's file or not.  STC  LLR: 2.96 (-2.94,2.94) [0.00,5.00]  Total: 71617 W: 13471 L: 13034 D: 45112  LTC  LLR: 2.95 (-2.94,2.94) [0.00,5.00]  Total: 48708 W: 6463 L: 6187 D: 36058  Bench: 5322108  ⭐⭐⭐   Stockfish 17090912 - download

Chess engine: SCTR 1.0

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SCTR 1.0 - download Authors: Can Cetin & Dogac Eldenk

Chess engine: Klasman Father

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Klasman Father - download

Isa 2.0.48 - winboard chess engine (Windows and Linux)

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Isa - winboard chess engine About engine: Isa is a chess engine I developp during my free time. Chess programming is my hobby since the 80's years. I started developing with QuickBasic 4.5 (I wrote a weak engine named Bishop) . Then I learned the C langage and studed the TSCP source code (like everyone I think) . « Titan » and « DCP » (DCP = Titan + winboard protocol) was born . Strengh was always so weak , around 1400 elo . After that I rewrote again my engine and Jars came out (I released Jars) and then Yoda (both played around 1800-1900 elo. After finding dificult to improve , I stopped working on both engines and started to work on Isa , a diferent way. I started Isa from Firstchess.c source. Author - Daniel Anulliero Rating JCER=2078 Isa 2.0.48 - download

TCEC Season 10 is starting about October 10th

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TCEC Season 10 Stage 1 - preliminary stage. Involving 24 engines, playing a single round robin. Time control: 60 min. + 10 sec/move. The top 8 engines qualify for the next stage! Confirmation of participation: 1. Andscacs 2. Vajolet 3. Fruit 4. Laser 5. Texel 6. Stockfish 7. Jonny 8. Fire 9. Nirvana 10. Komodo 11. Chiron 12. Fizbo