There is no way he manages to prmote that pawn. if i were you, i would do nxc4 and hes basically done. he would have absolutely no way of protecting the pawn on b5. You had a clear advantage. Good job!
Should he have resigned?
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Yes, after 52.Kb3 c4+, black will have a passed Queenside pawn and can move his King across to pass his King's rook pawn, so it is resignable if he didn't plan on 53.Kb2.
Funny thing after c4+ Kb2 (instead of natural move Kc2) black can't capture the knight because fxg6 and he's too late.
c4+ Kb2 gxf5 probably forced, no idea what happens after. White looks ok but if he can't support either f pawn and I don't see how because black's king is on time, or capture black's h pawn and support it's h pawn it's a draw. So yeah..probably draw.
Hello, I recently played an interesting chess game which reached an endgame in which my openent resigned, but I am not sure whether it was a losing position.
Comments on any part of the game are appreciated, but particularly the final position.