Double Pawn Mate:

This checkmate occurs when the King is in the "Stalemate" position and white uses a second pawn to roll up the board until the checkmate is delivered. Black is forced to move his pawns as his king is trapped once white plays the first important move - Ke6 - keeping the king stuck on the only safe square. White the starts pushing his second pawn until it delivers a check to the king - which in turn would be checkmate.