The Week in Chess

Tuesday, December 9, 2014

Beluga 141207 vs. Stockfish and Clones - 1000R 10S+100ms

There is a chess engine project at the github.com that has no executables released since the creation of the Official Stockfish tree and it is the original Stockfish by Marco Costalba and Joona Kiiski. It is still alive and  recently updated so I'm curious to see what is the difference between the official and original in terms of ELO strength. I compiled 2 chess engines from the source which are named as follows:

Beluga 141207 is a monkeyfied chess engine cloned from Marco Costalba's Stockfish original tree.

SF Marco 141207 is the original Stockfish by Marco Costalba.

As a base reference for the ELO determination, Beluga 141207 was used as the anchor in the gauntlet matches against the strongest chess engines namely, Stockfish 14120801, Houdini 4 Pro, Komodo 8, Orka 141208, Shark 141208 and SF Marco.

The results showed that the original SF Marco is slightly stronger than the original Stockfish but lower than all the monkeyfied clones. Houdini is very strong in this 10S+100ms time control edging Stockfish and Komodo does not like it.

Note that the Stockfish 14120801 x64 used was from the abrok.eu/stockfish home page.

Here is the ELO rating calculated from the results with a median ELO of 0.

   # PLAYER                              :  RATING    POINTS  PLAYED    (%)
   1 Orka 141208 x64                :   27.57        501.5      1000      50.1%
   2 Shark 141208 x64              :   26.87        500.5      1000      50.0%
   3 Beluga 141207 x64             :   26.52       3250.0     6000      54.2%
   4 SF Marco 141207 x64        :   19.51        490.0      1000      49.0%
   5 Houdini 4 Pro x64               :   17.41        487.0      1000      48.7%
   6 Stockfish 14120801 x64     :   16.35        485.5      1000      48.5%
   7 Komodo 8 x64                     : -134.24       285.5      1000      28.6%

Here are the match results:

Beluga 141207 x64 vs. Houdini 4 Pro x64 - 1000R 10S+100ms
RankEngineScoreKiHoS-B
1Beluga 141207 x64513.0/1000· ·· ·· ·· ·· ·302-276-422 249831.00 
2Houdini 4 Pro x64 487.0/1000276-302-422· ·· ·· ·· ·· · 249831.00 



Beluga 141207 x64 vs. Komodo 8 x64 - 1000R 10S+100ms
RankEngineScoreKiKoS-B
1Beluga 141207 x64714.5/1000· ·· ·· ·· ·· ·545-116-339 203989.80 
2Komodo 8 x64 285.5/1000116-545-339· ·· ·· ·· ·· · 203989.80 



 Beluga 141207 x64 vs. SF Marco 141207 x64 - 1000R 10S+100ms
RankEngineScoreKiSFS-B
1Beluga 141207 x64510.0/1000· ·· ·· ·· ·· ·153-133-714 249900.00 
2SF Marco 141207 x64490.0/1000133-153-714· ·· ·· ·· ·· · 249900.00 



Beluga 141207 x64 vs. Stockfish 14120801 x64 - 1000R 10S+100ms
RankEngineScoreKiStS-B
1Beluga 141207 x64 514.5/1000· ·· ·· ·· ·· ·157-128-715 249789.80 
2Stockfish 14120801 x64485.5/1000128-157-715· ·· ·· ·· ·· · 249789.80 



Beluga 141207 x64 vs. Orka 141208 x64 - 1000R 10S+100ms
RankEngineScoreOrKiS-B
1Orka 141208 x64 501.5/1000· ·· ·· ·· ·37-34-929 249997.80 
2Beluga 141207 x64498.5/100034-37-929· ·· ·· ·· · 249997.80 



Beluga 141207 x64 vs. Shark 141208 x64 - 1000R 10S+100ms
RankEngineScoreShKiS-B
1Shark 141208 x64 500.5/1000· ·· ·· ·· ·36-35-929 249999.80 
2Beluga 141207 x64499.5/100035-36-929· ·· ·· ·· · 249999.80 


1000 games played / Tournament finished

Tournament start: 2014.12.08, 10:26:11
Latest update: 2014.12.08, 22:51:07
Level: Blitz 0:10/0.1
Hardware: AMD Phenom(tm) IIX4 945 Processor with 6.0 GB Memory
Operating system: Linux 3.17.4-pclos1 64bit
Table created with: Arena 3.5

Download the match PGN games here.

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