How to force the computer to play another move on Chess.com? I am playing a game against the computer on chess.com. The computer made a move that looks absurd, so I would like to make it do another move instead and analyse the game. 

How to do it?

I tried to share the game with you, but when I hit the "share" button I cannot get a link to that particular moment into the game. Anyway I did Qxd7, Ka8 which is check mate after Qa7. I don't understand why the computer does not want to do Kxb6
Judging from the position, you were not playing the strongest computer level. Weaker levels simulate human blunders by deliberately making weaker moves.

Why not just go back a move? There should be an undo button.