The Week in Chess

Saturday, August 11, 2018

Stockfish 180729 vs. Clones


After some time of relative quiet, I decided to make a tournament for the purpose of knowing the current relative strength of Stockfish against its many clones.

I choose the better known SF clones which are in step with the latest version of Stockfish. To my surprise, Stockfish came in second behind the assembler based AsmFish and stood higher than the other SF clones which are supposedly made to surpass the original. But I suspect that the reason why Stockfish 180729 is stronger than most is because it was made by Abrok which I found to have strong compiles lately.

The tournament was a round robin with 100 games against each other.
Here are the  tournament settings:
Tournament manager: cutechess linux version
Book: custom book of 50 variations with 2 moves depth derived from the most common opening of different book sources.
Time control: 60 moves in 60 seconds base + 1 second increment, repeating
Win rule: 200 cp
Draw rule: 15 cp after 40 moves
Computer used: AMD Athlon, 4 cores, 16GB ram
Option.Threads: 1
Concurrency: 16

Rank Chess Engine ELO Games Score%  Win%  Draw% Loss%
1 Asm Fish 180723 x64  22.88 700 53.71 19.43 68.60 11.97
2 Stockfish 180729 x64  11.87 700 51.93 18.43 67.00 14.57
3 CFish 180730 x64  9.67 700 51.57 18.29 66.60 15.11
4 Shark 180729 x64  9.67 700 51.57 17.29 68.60 14.11
5 Brain Fish 180728 x64  3.08 700 50.50 18.00 65.00 17.00
6 Raubfisch X38d3b x64  -3.51 700 49.43 18.00 62.90 19.10
7 McBrain 9.6 x64  -26.39 700 45.71 12.57 66.30 21.13
8 Sugar XPro 1.5.3 x64  -27.27 700 45.57 14.71 61.70 23.59

Download the gauntlet PGN games here.

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