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Monday, August 21, 2017

Stockfish 17081914 - new version!

Stockfish, chess engine UCI

Leader rating list JCER = 3331
🔬 Author: IIvec

More:
Timestamp: 1503145951 

Fix some Clang warnings 
Found by Clang in extra verbose mode :-) 
No functional change. 


SF170810vk ASM wins JCER Test Tournament, 14-21.08.2017



Temp 3' + 3" Hardware: Intel Core i3-3217U CPU 3,9 GB Memory , Windows 10 x64
960 Tournament games, GUI-Arena 3.5.1161.651 JCER games,  until 31.12.2016
 
39.509 JCER games (from 01.01.2017)  JCER League
Book: Perfect 2017,   Table created - Scid vs PC

Stockfish 17081913 - new version!

Stockfish, chess engine UCI

Leader rating list JCER = 3331
🔬 Author: IIvec

More:
Timestamp: 1503143892 

Wide bench coverage 

Add tests for: 
- Positions with move list 
- Chess960 positions 

Now bench covers almost all cases, only few endgames are still out of reach (verified with lcov) 

It is a non functionality patch, but bench changed because we added new test positions. 
bench: 5479946 

⭐⭐⭐   Stockfish 17081913 - download

Chess Engine: BrainFish 170820 and book: Cerebellum Light 170819

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.


 BrainFish 170820 - download


Stockfish 170818 - 6 compilations!

Stockfish, chess engine UCI

Leader rating list JCER = 3331
🔬 Author: Marco Costalba

Stockfish 170818 - 6 compilations download





Shark 170815bf (has Cerebellum book integrated in exe file.)


Stockfish 17081723 - new version!

Stockfish, chess engine UCI

Leader rating list JCER = 3331
🔬 Author: IIvec

More:
Timestamp: 1503006142
Time management simplification 


STC (http://tests.stockfishchess.org/tests/view/598188a40ebc5916ff64a21b):
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 25363 W: 4658 L: 4545 D: 16160

LTC (http://tests.stockfishchess.org/tests/view/5981d59a0ebc5916ff64a229):
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 75356 W: 9690 L: 9640 D: 56026

40/10 TC (http://tests.stockfishchess.org/tests/view/5980c5780ebc5916ff64a1ed):
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 19377 W: 3650 L: 3526 D: 12201

15+0 TC (http://tests.stockfishchess.org/tests/view/5982cb730ebc5916ff64a25d):
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 5913 W: 1217 L: 1069 D: 3627

This time management handles base time and movestogo cases separatelly. One can test one case without affecting the other. Also, increment usage can be tested separately without (necessarily) affecting sudden death or x moves in y seconds performance.

On stable machines there are no time losses on 0.1+0.001 time control (tested on i7 + Windows 10 platform).
Bench 5608839 


⭐⭐⭐   Stockfish 17081723 - download

Supra 25 - UCI chess engine. New version

Supra - UCI chess engines

Author: Pedro Mourao Correia   Website


Previous version chess engine Supra 


RatingsJCER=1888,

Supra 25 download  



Stockfish 17081711 - new version!

Stockfish, chess engine UCI

Leader rating list JCER = 3331
🔬 Author: Marco Costalba

More:
Timestamp: 1502960640

Fix involuntary conversions of ExtMove to Move

The trick is to create an ambiguity for the
compiler in case an unwanted conversion to
Move is attempted like in:

ExtMove m1{Move(17),4}, m2{Move(4),17};

std::cout << (m1 < m2) << std::endl; // 1
std::cout << (m1 > m2) << std::endl; // 1(!)

This fixes issue #1204

No functional change. 


⭐⭐⭐   Stockfish 17081711 - download


Sayuri 2017.08.19 - new version chess engine UCI

Sayuri - UCI chess engine

Author - Hironori Ishibashi


      Sayuri previous versions

Rating JCER=1748