Two rooks alternate checks to drive the king to the edge and deliver mate.

The Ladder Mate (also known as the Lawnmower Mate or Rook Rolling) is a fundamental checkmate technique in which two major pieces systematically drive the opposing king to the edge by alternating checks.

How it works

• One rook checks the king, forcing it to retreat one rank.
  
• The other rook checks from the next rank, pushing the king further.
  
• The rooks leapfrog each other until the king reaches the edge—checkmate.