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Friday, August 26, 2016

Best chess engine: Stockfish 16082509. New version!

Stockfish - chess engines UCI

Previous version chess engine Stockfish 

Author compilation - 
 
Marco Costalba

Information on the compilation:
Timestamp: 1472111510 

Reformat stats update 

Rewritten in a way to have explicit in the search 
the bonus/penalty we apply: hopefully this will lead 
to further simplification/fix of current rather messy 
stats update code. 
No functional change.  



Ethereal rev 7.76 - UCI chess engine. New version!

Ethereal - UCI chess engine

Author - Andy Grant


About:
Ethereal is a UCI-compliant chess engine. It uses the traditional alpha-beta framework in addition to a variety of pruning, reduction, extension, and other improvements. Some of those improvements include Static Null Move Pruning, Null Move Pruning, Node Razoring, Depth base Futility Pruning, Best-Case Delta Pruning, Current-Move Delta Pruning, Late Move Reductions, Check extensions, and the use of various Transposition Tables. Ethereal generates moves using the Fancy Magic BitBoard technique, but also uses a redundant 64-length array to store pieces for easier lookup. 
Ethereal is an original engine aside from the Piece Square Tables (currently using Toga II's tables). It is greatly influenced from Crafty, Stockfish, TSCP, MadChess, and Fruit. Ethereal is a hobby project, but more importantly it is an active resume.

Ethereal rev 7.76 - download



Ippos 1.20 - UCI chess engine. New version!



Ippos - UCI chess engine (based on Ippolit 0.80)

Ippos 1.20 - download

Thursday, August 25, 2016

Octochess r7533 wins JCER Amateur League A, edition 01/2016, 2016.08.18 - 2016.08.23


Temp 3' + 3" Hardware: Intel Core i3-3217U CPU @ 1.80GHz with 3,9 GB Memory , Windows 10 64-bit
612 tournament games download, GUI-Arena 3.5.1134.382 JCER games download
Book: Perfect 2015, Table created - Scid vs PC 


Best chess engine: Stockfish 16082408. New version!

Stockfish - chess engines UCI

Previous version chess engine Stockfish 

Author compilation - 
 VoyagerOne

Information on the compilation:

Timestamp: 1472019992 

Refutation penalty on captures 

Apply refutation penalty for prior PV quiet move on captures 

LTC: 
LLR: 2.95 (-2.94,2.94) [0.00,5.00] 
Total: 8208 W: 1153 L: 1008 D: 6047 
http://tests.stockfishchess.org/tests/view/57bc5a9f0ebc59030fbe47b5 

Only LTC because a very similar patch already passed STC + LTC 

bench: 7038730 


Floyd 0.9 - UCI chess engine. New version!

Floyd - UCI chess engine
( for Windows, Linux and Mac).

Homepage

Rating JCER=2380


Author- Marcel van Kervinck 


Version 0.9: main changes:

Gained approximately 180 elo at fast time controls

Better handling of zugzwang positions

Fixed illegal moves deep in PV (reported by Dirk-Jan D.)

Full solution for the "0readyok" problem: also don't split info lines

Able to abort search in Python module (e.g. by Ctrl-C) 


Under the hood:

Added history counters for move ordering

Improved move ordering for killers

Improved null move pruning/reductions (aka verification)

Added delta pruning

Added hanging piece evaluation

Added basic futility pruning, razoring and stand pat pruning

Some minor evaluation weight tuning

Simplified UCI move printing

Eliminated spurious "Illegal move" in debug mode 




Best chess engine: Stockfish 16081908_b. New version!

Stockfish - chess engines UCI

Previous version chess engine Stockfish 

Author compilation - 
 
VoyagerOne

Information on the compilation:
Timestamp: 1471589958 
Simplify IID 

STC: 
LLR: 2.96 (-2.94,2.94) [-3.00,1.00] 
Total: 30468 W: 5687 L: 5582 D: 19199 
http://tests.stockfishchess.org/tests/view/57b1ddd80ebc591c761f63e2 

LTC: 
LLR: 2.95 (-2.94,2.94) [-3.00,1.00] 
Total: 87406 W: 11756 L: 11725 D: 63925 
http://tests.stockfishchess.org/tests/view/57b212590ebc591c761f63f9 

bench: 6554900 



Sayuri 2016.08.20 - new version chess engine UCI

Sayuri - UCI chess engine

Author - Hironori Ishibashi


      Sayuri previous versions

JCER=1718


Sayuri 2016.08.20 download



Sunday, August 21, 2016

Best chess engine: Stockfish 16081908. New version!

Stockfish - chess engines UCI

Previous version chess engine Stockfish 

Author compilation - 
 
VoyagerOne

Information on the compilation:
Timestamp: 1471589414 
Do LMR on captures 

STC: 
LLR: 2.95 (-2.94,2.94) [0.00,5.00] 
Total: 5361 W: 1086 L: 936 D: 3339 
http://tests.stockfishchess.org/tests/view/57b31b0f0ebc591c761f643d 

LTC: 
LLR: 2.96 (-2.94,2.94) [0.00,5.00] 
Total: 54694 W: 7591 L: 7287 D: 39816 
http://tests.stockfishchess.org/tests/view/57b3442b0ebc591c761f6450 

bench: 6881120