The test was done on single computer with AMD CPU 4 cores but only 2 cores were allocated so that it would be possible to have 2 instances of the tournament to finish quickly. It was a 4 engine-100 round matches in the fast 1 minute base + 1 second increment time control. Additional information could be found in the results below.
After less than 24 hours of continuous games, a winner emerge.
And the winner is... Stockfish O.W.L. compilation!
This is the same compilation which was despised and ridiculed by some people as it surprisingly became the compilation to put the Stockfish chess engine NUMBER ONE first as compared with the Chess Engines Rating Lists all over the world. The owl compilation was taken out in the last Owl Chess Engines Rating List and replaced it with the official Stockfish compilation from www.abrok.eu/stockfish to remove doubts that Stockfish is really the number 1 chess engine as of this date.
As stated in the previous post, the Stockfish owl version will only be used for personal fun and to do battle with the other Stockfish clones. This clone competition will remind the Stockfish team that somewhere, there are Stockfish clones that will always be stronger than the original if it could provide a quick update after the release of the latest commit. IpmanSE3 and RDMF clones in the test were dated April 13 and April 14 respectively so their true strength were not updated, but the O.W.L. version managed to compile immediately just hours after the last patch. This may be an endless cycle as the original Stockfish will get stronger, the clones must update quickly to maintain the lead. It maybe the reason why there is no one Stockfish clone that ever managed to grab the spotlight for a long time unless one super smart guy is above the rest, like what happened with the Ippolit family of chess engines.
Here is the result of the Stockfish clones tournament:
Stockfish 14042817 x64 vs. Stockfish Clones Tournament - 2014-04-29
|1||Stockfish 14042817 x64 owl||160.0/300||· ·· ·· ··||19-14-67||18-11-71||21-13-66|
|2||Stockfish_14042817_x64||153.0/300||14-19-67||· ·· ·· ··||14-9-77||20-14-66|
|3||Stockfish 210414 RDMF||145.0/300||11-18-71||9-14-77||· ·· ·· ··||17-15-68|
|4||Stockfish IpmanSE3 x64||142.0/300||13-21-66||14-20-66||15-17-68||· ·· ·· ··|
600 games played / Tournament finished
Tournament start: 2014.04.29, 01:31:40
Latest update: 2014.04.30, 00:42:19
Level: Blitz 1/1
Hardware: AMD Phenom(tm) II X4 945 Processor with 1.8 GB Memory
Operating system: Windows 7 Ultimate Professional Service Pack 1 (Build 7601) 64 bit
Table created with: Arena 3.5
Download the Stockfish clones tournament PGN games here.