You should give an example of what move and what game you wanted the takeback? If you played 1.d3 instead of 1.d4 like I did by accident you should play out that game imo. I won that game. If you are in a sharp complex position dropping your Queen by accident then it depends how much your opponent wants to win. Your opponent has no power if you play a game of Chess merely when they win it over you in some cases. If that's the goal.
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