MATE-N-4 WHITE TO MOVE:

This was a very interesting queenless game by me as white had black not taken the h2 pawn to escape the ensuing queen fork and played at 3000+elo like the Houdini 2 engine...white would have won but suprisingly the game would have lasted over 40 moves longer.

Below is Houdini 2 starting as Black playing against itself from the same position with black hanging on increduously for 40+ moves:

Thx, good puzzle!