Slav Defense Fork Puzzle (Rated 843): Win with a Fork — Decisive Material Gain
This chess endgame puzzle is a clean example of tactical simplification leading to a decisive material gain. White’s active bishop creates a forcing check that also exposes a loose rook, turning a defensive position into a winning combination. The key idea is that a check can be more than a king move: it can improve piece coordination, force the king into a passive square, and leave a major piece hanging. In classical chess, these short tactical sequences often decide the game immediately.