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Thursday, May 25, 2017

Isa 2.0.45 - winboard chess engine (Windows and Linux)

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=1951

Chess engine: McBrain 2.4

McBrain is a Stockfish based chess engine ( directly derived from the Stockfish source).
Stockfish is currently the strongest chess engine in the world. McBrain also features the Cerebellum book and code used by Brainfish (a Stockfish (SF) based engine by Thomas Zipproth - with the Cerebellum book enabled it will play about 30 ELO stronger than Standard Stockfish.

Chess engine: SF170426 pedvk

Wednesday, May 24, 2017

Chess book: Cerebellum_light 170523

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 Stockfish regarding the evaluation, only at a much higher skill level. Pondering is only active after the last move out of the book has been played.

The lines in Cerebellum_light.bin are in some cases reaching the late middlegame and endgame.

BrainFish is licensed unter the GPL, which includes the access code to the general book format.

Stockfish 17052405 - new version!

Stockfish, chess engine UCI
Leader rating list JCER = 3387
🔬 Author: VNathan Rugg

Timestamp: 1495596450 

Changed spelling back to "Bishops" in eval output 
No functional change. 
Closes #1124 
⭐⭐⭐   Stockfish 17052405 - download

Komodo 9 is free !

Komodo 9 - JCER Rating=3151
Authors: Don Dailey, Larry Kaufman, Mark Lefler

Komodo 9 download

Tuesday, May 23, 2017

Gogobello 1.2 - UCI chess engine. New version

Gogobello - UCI chess engine

Gogobello homepage

Author - Salvatore Giannotti (Italy)   

 Gogobello previous versions


 Gogobello 1.2 - download 

Chess engine: Symphysodon 220517

Rating JCER=3335

Author - Jose Perez

Stockfish 17052203 - new version!

Stockfish, chess engine UCI
Leader rating list JCER = 3387
🔬 Author: VoyagerOne

Timestamp: 1495416477 

Evasion Pruning Tweak 
Use moveCount to decide when to prune for evasion pruning 

LLR: 2.95 (-2.94,2.94) [0.00,5.00] 
Total: 24476 W: 4518 L: 4289 D: 15669 

LLR: 2.96 (-2.94,2.94) [0.00,5.00] 
Total: 18362 W: 2476 L: 2298 D: 13588 

Bench: 6469989 
Closes #1120 
⭐⭐⭐   Stockfish 17052203 - download


Chess engine: asmFish 2017-05-21