Chess Puzzle #HoU5V — Advanced, Black to move, endgame

Position

White: king g1; rooks b7/g6; pawns f2/g2/h5. Black: king f8; rooks a8/e4; pawns a3/e6/f4. Material is balanced. Black to move.

Solution (3 moves)

1. Opponent setup: h6 — pawn h5→h6. Now Black to move.
2. Best move: a2 — pawn a3→a2. Opponent replies h7 (pawn h6→h7).
3. Best move: a1=Q+ — pawn a2→a1, promotes to queen, gives check. Opponent replies Kh2 (king g1→h2).
4. Best move: Qh8 — queen a1→h8.

Tactical themes

advanced pawn, advantage, endgame, long, promotion, rook endgame. The key move is a2.

Position data

FEN: r4k2/1R6/4p1R1/7P/4rp2/p7/5PP1/6K1 w - - 0 42

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