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

Position

White: king e3; rook b2; pawns b7/f3. Black: king g5; rook h1; pawns g2/h3. Material is balanced. Black to move.

Solution (3 moves)

1. Opponent setup: b8=Q — pawn b7→b8, promotes to queen. Now Black to move.
2. Best move: g1=Q+ — pawn g2→g1, promotes to queen, gives check. Opponent replies Ke4 (king e3→e4).
3. Best move: Qe1+ — queen g1→e1, gives check. Opponent replies Kd5 (king e4→d5).
4. Best move: Qd1+ — queen e1→d1, gives check.

Tactical themes

advanced pawn, crushing, endgame, long, promotion. The key move is g1=Q+.

Position data

FEN: 8/1P6/8/6k1/8/4KP1p/1R4p1/7r w - - 0 43

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