The Week in Chess

Thursday, May 23, 2019

Stockfish 19051723 vs. Clones


Highlights:
 - Asm Fish is back on top displacing CFish which is stale since the last tournament
 - New clone included is Stockfish Polyglot by Massimiliano Goi at number 6
 - Stockfish is now in the 3rd place from 7th in the previous post. Maybe the clones were not able to synchronize on time.
 - McCain maintained its last position. Strange, but its author's test showed to be on top
 - Shark is down to number 5 from its previous number 3
 - The other SF clones are more or less on the same order of rank sequence.

To minimize random results, the tournament was conducted on a single computer with their factory settings and cutechess-cli tournament manager was used. The tournament was continuous with no pause, restart or change of settings while in progress. Here is the snapshop of the settings used:
  -each tc=60+1 proto=uci timemargin=1000 option.Threads=1 \
  -openings file=./Books/opening50-2ply.pgn format=pgn order=sequential plies=2 start=1 \
  -resign movecount=1 score=200 twosided=true \
  -draw movenumber=40 movecount=1 score=20 \
  -maxmoves 80 \
  -concurrency 20 \
  -games 1 \
  -rounds 100 \
  -repeat \
  -tournament round-robin \
  -recover

Houdini was included just for reference point of ELO score.

Rank  Chess Engine   ELO    Games  Score%  Win%  Draw% Author
 1  Asm Fish 2019-05-18 x64  3559   1100  55.27 26.82 56.90 M. Li, L. Antonov. J. Dehorty
 2  CFish 190324 x64  3554   1100  54.45 25.27 58.40 Ronald De Man
 3  Stockfish 19051713 x64  3542   1100  52.64 23.18 58.90 Romstad, Costalba, Kiiski, Linscott
 4  Brain Fish 190515 x64  3541   1100  52.50 22.55 59.90 Thomas Zipproth
 5  Shark 190517 x64  3537   1100  51.86 21.55 60.60 Krahs
 6  Stockfish Polyglot 190515 x64  3534   1100  51.45 23.18 56.50 Massimiliano Goi
 7  Raubfisch X40b2 x64  3524   1100  49.77 19.55 60.50 Frank Karl Warner
 8  Cor Chess 3.1 x64  3521   1100  49.32 18.73 61.20 Ivan Ivec
 9  Sugar MCTSL 220319 x64  3513   1100  48.09 20.64 54.90 Marco Zerbinati
 10  Shash 8.0 x64  3511   1100  47.77 15.55 64.50 Andrea Manzo
 11  McCain X3 x64  3501   1100  46.23 16.55 59.40 Michael Byrne
 12  Houdini 6.02 x64  3464   1100  40.64 12.73 55.80 Robert Houdart

Download the gauntlet PGN games here.

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