checkmate with a knight
Try and checkmate the black king
Do not go through this if you have not done the puzzle (it will show the solution)
These moves rely on black not wanting to lose the pawn and the black king staying on the A file. If white takes the pawn there is no way of checkmating black.
In this variation black knows the tactic and trys to avoid it. Although in this white checkmates black, on many moves black could force a draw with repition.