Double Bishop Mate
Two bishops mate by controlling complementary diagonals around a confined king. One bishop gives check while the other covers an escape square.
What to look for
Look for a king restricted by its own pieces and two bishops whose diagonals cover different escape squares.
Recognize the mechanism
Follow the bishops on their complementary diagonals. Ask which bishop checks and which takes away an escape. The practical skill is seeing their combined coverage around a confined king, even when the pieces begin far apart.
Common practical mistake
Do not treat this tactical pattern as identical to the technical king-and-two-bishops endgame. In a crowded position, the defender’s own pieces can be essential to confinement.
Training goal
Improve your ability to see long diagonal mating patterns.