It’s a subject I’ve broached before, though largely unheeded, about Stockfish 8 sometimes errant behavior. Consider this comment by <chessgames> on CG for http://www.chessgames.com/perl/chessgame?gid=1899418: Dec-10-17 chessgames.com: We stuck Stockfish on 21.? for 5 hours to see if it could come up with 21.Bg5!!The answer is “no” — analysis of move 21.? First of all, I wish…

OK, AlphaGo has morphed into AlphaZero, a self-learning neural net that is claimed to have trounced Stockfish 8, the current champ chess engine. There were 100 games between the two, ten of which were published in this paper: Mastering Chess and Shogi by Self-Play with a General Reinforcement Learning Algorithm (arxiv) Now, lots of sites have…