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You say underpromotion, but something people are surprised by is making a second queen ime. People sometimes assume promotion is actually "taking a captured piece back".



Very understandable how this developed in the era of over the board play. You can't have two queens when they don't physically exist!

I always use an upside down rook, somehow there's always one available by then.


I end up using a checkers piece, since pretty much every board I've played on has them.




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