I never thought I could miss a mate-in-one, especially in a tournament game, but it happened!!

This position is taken from my fourth round tournament game against Nathan Green in the "Ye Olde Pueblo Open" held in Tucson, Arizona in July of '94. Black to play and mate!

I played 1...Nd2+, which wins White's Queen for two Knights after 2.Kxh3 Nxb3 3.Rxb3.

 

to see the mate that I missed.