Three Queens.

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In my previous game I had a queen and made two pawns as queens and had a plus29 point difference. As soon as I made the third queen the server aborted the game and declared it stalemate. I want to know why.
Therelaxedguy
Probably because when you made the third queen, you blocked the last available squares for your opponent’s King. If your opponent has no available moves, and they’re not in check, it’s a stalemate.

You gotta be careful with that in endgames where you’re WAY up in points. It’s easy to accidentally stalemate. Whenever you move a piece, you have to make sure your opponent’s king has somewhere to go (unless you’re putting them in check).