Comment by wslh

Even though chess is now effectively solved against human players, I still remember Kasparov's suspicion that one of Deep Blue's moves had a human touch. It was never proven or disproven, but I trust Kasparov's deep intuition amplified by Kasparov requesting access to Deep Blue’s logs, and IBM refusing to share them in full. For more discussions see [1][2][3].

[1] https://chess.stackexchange.com/questions/9959/did-deep-blue...

[2] https://nautil.us/why-the-chess-computer-deep-blue-played-li...

[3] https://en.chessbase.com/post/deep-blue-s-cheating-move