Surprised no one pointed out 19...Qxg2 Kxg2 20...Bxe5 and white can resign.
waffllemaster: your moves begin 5 moves past the puzzle position. Can you provide the preceeding sequence?
Sorry, thought people were somehow talking about the OP. Yeah the puzzle looks right, Qf3 as whoever it was pointed out and black isn't trapped after all, but even worse white will lose material.
K-moves B-h3 mate
This is a well known trap from another game. I forget the other game, but I don't think is was a Grunfeld.