Rook Vs Two Bishops Puzzle (Rated 1274): Fork — Win Material
A powerful chess endgame fork often begins with a forcing check. By checking the king while attacking another valuable piece, a rook can create two simultaneous threats that cannot both be answered. In this position, Black uses active rook placement to exploit a hanging bishop and overturn White’s material advantage. The key idea is not simply to attack a loose piece, but to combine the attack with check so the opponent has no time to save everything.