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Thursday, January 19, 2017

Chess engine: Roc (derived from Gull 3)

Roc is a new chess engine, derived from Gull 3

Roc has the following refinements: 
-- based on a C++ port of Gull 3, eliminating goto tatements. 
-- fixes some minor bugs found in the Gull source 
-- unit of valuation changed from 1 cp to 1/4 cp 
-- extends Gull's two phases (opening, endgame) to 3 phases (opening, middle, endgame) plus a phase-like contribution for closed-ness 
-- supports a contempt setting 
-- adds king tropism to evaluation 

In tests so far, Roc appears to be slightly stronger (5 +/- 5 Elo) than Gull 3. 



Wednesday, January 18, 2017

Chess Engine: BrainFish 170114

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 170114 - download


Chess engine: Lima 3.0





Jurek Chess Engines Championship 2017. Match No.4 Gull - DeepSaros eXp rev.6 (1,5-0,5)

Jurek Chess Engines Championship 2017


πŸ‘₯ Participants 32 best engines JCER rating as at 01-01-2017.

⏰ Temp:  60' + 15"
πŸ”€System: Cup
🚴 Start: 14-01-2017



Jurek Chess Engines Championship 2017.

Match No.4 Gull - DeepSaros eXp rev.6 (1,5-0,5)

P
Engine Jcer Score 12 Chg
1: Gull 16021522 3210 1.5 / 2 =1 +0
2: DeepSaros eXp rev.6 3020 0.5 / 2 =0 +0

2 games downloadHardware: Intel Core i7-4710MQ CPU @ 2.50GHz with 7,9 GB Memory , Windows 10 x64
GUI-Fritz 12 Book: Perfect 2016, Table created - Scid vs PC 

- no title specified
Jurek Chess Engines Championship 2017
             
               
               
               
               
1. Stockfish – JCER 3406.    1,5
             
             
               
               
32. Arasan – JCER 2962.   0,5
             
  Stockfish
         
               
               
17. PanChess – JCER 3068   2,5
  PanChess
         
             
               
               
16. Bouquet – JCER 3077   1,5
             
             
               
               
9. Andscacs – JCER 3118   2
             
             
               
               
24. Nirvanachess – JCER 3023   0
             
  Andscacs
         
               
               
25. DeepSaros – JCER 3020   0.5
  Gull
         
             
               
               
8. Gull – JCER 3210   1,5
             
             
               
               
5. SugaR – JCER 3368
             
             
               
               
28. Texel – JCER 3001
             
             
               
               
21. ComStock 3 – JCER 3055
             
             
               
               
12. Critter 1.6a – JCER 3096
             
             
               
               
13. Fritz 15 – JCER 3091
             
             
               
               
20. DeepRybka 4.1 – JCER 3056
             
             
               
               
29. Chiron 3.01 – JCER 2995
             
             
               
               
4. Houdini 5.01 – JCER 3370
             
             
               
               
3. Komodo 10.3 – JCER 3379
             
             
               
               
30. BlackMamba 2.0 – JCER 2995
             
             
               
               
19. IvanHoe T0.4.1 – JCER 3056
             
             
               
               
14. Equinox – JCER 3088
             
             
               
               
11. Mars – JCER 3106
             
             
               
               
22. Hannibal – JCER 3045
             
             
               
               
27. Protector 1.9.0  - JCER 3007
             
             
               
               
6. Judas PrO – JCER 3324
             
             
               
               
7. Fire 5 – JCER 3214
             
             
               
               
26. Ippos – JCER 3013
             
             
               
               
23. Sting sf – JCER 3043
             
             
               
               
10. Strelka 6 x32 – JCER 3116
             
             
               
               
15. Fizbo 1.9 – JCER 3082
             
             
               
               
18. RobboLito 0.21Q – JCER 3065
             
             
               
               
31. DeepHiarcs – JCER 2986
             
             
               
               
2. Raubfisch – JCER 3393