I dont see the mistake here

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Avatar of Maneco_V

HI!, i had this game a few minutes ago and then I checked the analisys of the game, for some reason this move is loser and IDK why, i dont see the problem yet

this move its marked as a (??) the move is b7

Avatar of Toldsted

Black takes your Bishop at c7, and if you then promote your pawn Black plays g4-g3+ and mates you in the next move with Rc1#