Besides that, the article provides the new games played with a reasonable time control for SF as well as opening books. UPDATE: in the recent article "AlphaZero: Shedding new light on the grand games of chess, shogi and Go" the rating for Stockfish was drawn as a line at 3500. Nonetheless, winning over Stockfish is quite an achievement, no matter how handicapped it was and how much was the difference in hardware cost. There are more, but these are main points.Īnswering your question, there's no way to measure how much rating Stockfish had in a very handicapped conditions it had to run.The hardware was quite different - an average $1k PC (Stockfish) against a bunch of specialized hardware that might cost millions and is not accessible to anyone.Stockfish had threads=64 set, but the actual hardware had only 8 CPU cores, that effectively slowed things down quite a lot.Time control was 1 minute/move, which throws out of the window various optimizations re: using more time thinking about difficult moves.The Stockfish version that played agaist AlphaZero was significantly compromised in several different aspects:
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