Opera Mate

Opera mate is a rook mate on the back rank, named for a famous game, where the rook gives check on the back rank and the king's own pawns block the escape. The rook on the back rank attacks the whole rank, and the king's own pawns fill the escape squares.

The finished shape

This is the finished shape. Opera mate is a rook mate on the back rank, named for a famous game, where the rook gives check on the back rank and the king's own pawns block the escape.

FEN: R5k1/5ppp/8/8/8/8/8/5K2 b - - 0 1

a b c d e f g h
8 R . . . . . k . 8
7 . . . . . p p p 7
6 . . . . . . . . 6
5 . . . . . . . . 5
4 . . . . . . . . 4
3 . . . . . . . . 3
2 . . . . . . . . 2
1 . . . . . K . . 1
  a b c d e f g h

The worked example

White plays the mating move here. The rook on the back rank attacks the whole rank, and the king's own pawns fill the escape squares.

FEN: r5k1/5ppp/8/8/8/8/8/R4K2 w - - 0 1

a b c d e f g h
8 r . . . . . k . 8
7 . . . . . p p p 7
6 . . . . . . . . 6
5 . . . . . . . . 5
4 . . . . . . . . 4
3 . . . . . . . . 3
2 . . . . . . . . 2
1 R . . . . K . . 1
  a b c d e f g h

How to prevent it

Black plays h6 first. The pawn move opens an escape square, so the mate no longer works.

FEN: r5k1/5ppp/8/8/8/8/8/R4K2 b - - 0 1

a b c d e f g h
8 r . . . . . k . 8
7 . . . . . p p p 7
6 . . . . . . . . 6
5 . . . . . . . . 5
4 . . . . . . . . 4
3 . . . . . . . . 3
2 . . . . . . . . 2
1 R . . . . K . . 1
  a b c d e f g h

Key points

The rook on the back rank attacks the whole rank, and the king's own pawns fill the escape squares.
The worked example ends with Rxa8.
To prevent it, keep an escape square open for the king before the rook arrives.
Black plays h6 first. The pawn move opens an escape square, so the mate no longer works.
Check every escape square before you play the mating move, because one open square breaks the mate.

Try it Yourself

Edit the code, then press Run.

Running is simulated · Rust Playground

Exercise

Find the checkmate in this position.

Kf2 Ke2 Rxa8# Kg2