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Showing posts from November, 2015

Stockfish 251115 wins JCER Test Tournament strong chess engines, 2015.11.28 - 2015.11.29

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168 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz z 3,9 GB system: Windows 8.1 64 bit  GUI- Fritz 14 Book: Perfect 2015Table created:Scid vs PC


Zurichchess geneva - chess engines UCI. New version!

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Zurichess - UCI chess engine

Author - Alexandru Mosoi

Zurichchess previous versions

Zurichchess geneva download


Stockfish 15112108b wins JCER - Test Clone Stockfish, 2015.11.24 - 2015.11.27

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240 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz z 3,9 GB system: Windows 8.1 64 bit  GUI- Arena 3.5 Book: Perfect 2015Table created:Scid vs PC


Sayuri 2015.11.28 - new version chess engine UCI

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Sayuri - UCI chess engine

Author - Hironori Ishibashi

Sayuri previous versions

JCER=2309

Sayuri 2015.11.28 download


First Test Rhetoric 1.4.3, 2015.11.27 - 2015.11.28

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100 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz z 3,9 GB system: Windows 8.1 64 bit  GUI- Arena 3.5 Book: Perfect 2015Table created:Scid vs PC


K2 0.79 - UCI chess engine. New version

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K2 - UCI chess engines

Author - Sergey Meus 

Previous version chess engine K2


Rating JCER older versions:
K2 0.71=2444 K2 0.75=2413  K2 0.63=2386  K2 0.57=2340  


K2 0.79 download



JCER Stockfish Test Tournament, 2015.11.24

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60 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz z 3,9 GB system: Windows 8.1 64 bit  GUI- Arena 3.5 Book: Perfect 2015Table created:Scid vs PC


Komodo 7 is free !

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JCER Match Stockfish, 2015.11.24

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50 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz with 7,9 GB Memory 
system: Windows 10 64 bit  GUI-Arena 3.5 Book: Perfect 2015Table created:Scid vs PC


Rhetoric 1.4.3 - UCI chess engine. New version

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Rhetoric - UCI chess engines
Author - Alberto Sanjuan

Rating JCER older versions - Rhetoric=2631,

Rhetoric 1.4.3 download




Chess Assistant 16 - released

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Chess Assistant 16 - best chess software for managing chess games and databases.

Language versions: English, German, French, Spanish, Italian.


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Stockfish 15112502 - new development version very strong chess engine UCI

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Stockfish - chess engines UCI

Previous version chess engine Stockfish

Author compilation - Joona Kiiski


Information on the compilation: Timestamp: 1448414685 
Revert "Allow cross compilation of Windows binaries on a Linux system" 
This reverts commit 388630ae285b3f9f0c8ee4f30e754bde6688c57c. 
Confuses fishtest build system 


JCER=3256


Stockfish 15112502 - download

Protector 1.9.0 wins JCER Mini Test Tournament, 2015.11.23 - 2015.11.24

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60 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz with 7,9 GB Memory 
system: Windows 10 64 bit  GUI-Arena 3.5 Book: Perfect 2015Table created:Scid vs PC


Stockfish 15112402 - new development version very strong chess engine UCI

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Stockfish - chess engines UCI

Previous version chess engine Stockfish

Author compilation - Mstembera


Information on the compilation: Timestamp: 1448327174 

Allow cross compilation of Windows binaries on a Linux system 
that are PGO, LTO, and statically linked. 
Credit: 
No functional change 
Resolves #505 


JCER=3256


Stockfish 15112402 - download

Stockfish 15112108b wins JCER Stockfish Test Tournament, 2015.11.22 - 2015.11.24

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150 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz z 3,9 GB system: Windows 8.1 64 bit  GUI- Arena 3.5 Book: Perfect 2015Table created:Scid vs PC


First Test Greko2015, 2015.11.22 - 2015.11.23

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50 games download  Temp: 3' + 3"Hardware: Intel(R) Core(TM) i7-4710MQ CPU @ 2.50GHz with 7,9 GB MemoryGB system: Windows 10 64 bit  GUI- Arena 3.5Book: Perfect 2015Table created:Scid vs PC


Komodo 9.2 wins JCER Test Tournament very strong Chess Engines, 2015.11.21 - 2015.11.22

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168 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz z 3,9 GB system: Windows 8.1 64 bit  GUI- Arena 3.5Book: Perfect 2015Table created:Scid vs PC


Greko 2015 - UCI chess engine. New version

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Greko - UCI chess engines 

Author: Vladimir Medvedev

Ratings: JCER=2507

Greko 2015 - download





Stockfish 15112108b - new development version very strong chess engine UCI

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Stockfish - chess engines UCI

Previous version chess engine Stockfish

Author compilation - Mstembera


Information on the compilation: Timestamp: 1448091007 

Clean up RootMove less operator 

This is used by std::stable_sort() to sort moves from highest score to lowest score. 

1) The comment is incorrect since highest to lowest means descending. 
2) It's more natural to implement a less operator using another less operator rather than a greater operator. 

No functional change. 

Resolves #504 


JCER=3256


Stockfish 15112108b - download

SugaR PrO 1.2a - strong chess engine. New version

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Sugar - UCI chess engine

Author - Marco Zerbinati 

Previous version chess engine Sugar


SugaR PrO 1.2a - download




Alfil 15.8 wins JCER Test Tournament Chess Engines, 2015.11.19 - 2015.11.21

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180 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz z 3,9 GB system: Windows 8.1 64 bit  GUI- Arena 3.5Book: Perfect 2015Table created:Scid vs PC


Stockfish 15112108 - new development version very strong chess engine UCI

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Stockfish - chess engines UCI

Previous version chess engine Stockfish

Author compilation - Lucasart


Information on the compilation: Timestamp: 1448090633 

Fix TT comment and static_assert() 

Comment is based on a misunderstanding of what unaligned memory access is. Here is an article that explains it very clearly: 
https://www.kernel.org/doc/Documentation/unaligned-memory-access.txt 

No matter how we define TTEntry or TTCluster, there will never be any unaligned memory access. This is because the complier knows the alignment rules, and does the necessary adjustments to make sure unaligned memory access does not occur. 

The issue being adressed here has nothing to do with unaligned memory access. It is about cache performance. In order to achieve best cache performance: 
- we prefetch the cacheline as soon as possible. 
- we ensure that TT clusters do not spread across two cachelines. If they did, we would need to prefetch 2 cachelines, which could hurt cache performance. 

Therefore the true condi…

Gnucheese 1.0 wins JCER Fritz Test Tournament, 2015.11.16 - 2015.11.17

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180 games download  Temp: 3' + 3"
Hardware: Intel(R) Core(TM) i3-3217U CPU @ 1.80GHz z 3,9 GB system: Windows 8.1 64 bit  GUI- Arena 3.5Book: Perfect 2015Table created:Scid vs PC


Stockfish 15112107 - new development version very strong chess engine UCI (author: Marco Costalba)

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Stockfish - chess engines UCI

Previous version chess engine Stockfish

Author compilation - Marco Costalba


Information on the compilation: Timestamp: 1448088530 

Rewrite how threads are spawned 

Instead of creating a running std::thread and returning, wait in Thread c'tor that the native 
thread of execution goes to sleep in idle_loop(). 

In this way we can simplify how search is started, because when main thread is idle we are sure also all other threads will be idle, in any case, even at thread creation and startup. 

After lazy smp went in, we can simpify and rewrite a lot of logic that is now no more needed. This is hopefully the final big cleanup. 

Tested for no regression at 5+0.1 with 3 threads: 
LLR: 2.95 (-2.94,2.94) [-5.00,0.00] 
Total: 17411 W: 3248 L: 3198 D: 10965 

No functional change.


JCER=3256


Stockfish 15112107 - download