These are the top three engines on the January 30, 2021 CCRl list. Can someone with CCRL confirm that the number 1 Stockfish on this list was only running on 1 cpu? Seems like it is doing pretty well as compared to the Stockfish 12 running on 4 cpu's. Thanks.
1 Stockfish 2021-01-11 64-bit 3551 +28 −27 85.2% −271.0 29.3% 614
78.8%
ShashChess 15.0 64-bit 4CPU 3534 +26 −25 76.2% −173.2 47.1% 522
86.4%
Stockfish 12 64-bit 4CPU 3517 +20 −20 72.6% −145.5 54.4% 789
55.8%
CCRL Jan 30 List Question
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Re: CCRL Jan 30 List Question
Correct, 1CPU. We are currently testing 4CPU and it isn't a big improvement over 1CPU. In the days of A/B engines +100 Elo on 4CPU was the norm, sometimes more. Now with NNU engines it seems you get +30 if you are lucky. Sure, they do go well on high core counts like TCEC, but it seems that they need 8 or even 16 CPU to stretch their legs.
SF 2021-01-11 on 1CPU did show big gains from SF12 on 1CPU but maybe SF12 was underrated. Remember the error bars, and also some noise potentially around different hardware. NNUE shows big gains on AVX2 for example that old SF did not.