Chess variant - Take back!

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There is an interesting chess variant named "Take back!"It was created by the famous Hungarian writer, Frigyes Karinthy. It is a usual chess game, but after every move the opponent can say: "Take back!".In this case the other player have to take back his move and take an other (different) move. Each player can say this only 1 times after each moves. When the opponent takes back the move, and play an other move, this 2nd move must be accepted. It's very funny when my opponent can give me a mate, but every other move losing. He will very angry when I say "Take back!" after his mating move.