Chess Puzzle #WbumQ — Advanced, Black to move, endgame

Position

White: king f2; rook b6; pawns a5/g3/h4. Black: king e5; rook e6; pawns a6/f5/h5. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: Ke3 — king f2→e3. Now Black to move.
2. Best move: Rxb6 — rook e6→b6, captures rook. Opponent replies axb6 (pawn a5→b6, captures rook).
3. Best move: Kd6 — king e5→d6. Opponent replies b7 (pawn b6→b7).
4. Best move: Kc7 — king d6→c7. Opponent replies b8=Q+ (pawn b7→b8, promotes to queen, gives check).
5. Best move: Kxb8 — king c7→b8, captures queen.

Tactical themes

crushing, endgame, rook endgame, very long. The key move Rxb6 wins material.

Position data

FEN: 8/8/pR2r3/P3kp1p/7P/6P1/5K2/8 w - - 2 58

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