Humans make illegal moves too. So much that there's a rule for it-- "Penalty for Illegal Moves The penalty for the first illegal move is to add two minutes to

Humans make illegal moves too. So much that there's a rule for it-- "Penalty for Illegal Moves The penalty for the first illegal move is to add two minutes to the opponent's time. A second illegal move results in loss of the game.". https://new.uschess.org/sites/default/files/media/documents/uschess-fide-rules-comparison.pdf https://new.uschess.org/sites/default/files/media/documents/...