Chess Puzzle #TzWU4 — Expert, Black to move, endgame

Position

White: king b7; rook g8; pawn b6. Black: king f3; rook c4; pawn g2. Material is balanced. Black to move.

Solution (4 moves)

1. Opponent setup: Ka8 — king b7→a8. Now Black to move.
2. Best move: Ra4+ — rook c4→a4, gives check. Opponent replies Kb7 (king a8→b7).
3. Best move: Rg4 — rook a4→g4. Opponent replies Rxg4 (rook g8→g4, captures rook).
4. Best move: Kxg4 — king f3→g4, captures rook. Opponent replies Ka6 (king b7→a6).
5. Best move: g1=Q — pawn g2→g1, promotes to queen.

Tactical themes

advanced pawn, crushing, endgame, promotion, rook endgame, very long. The key move is Ra4+.

Position data

FEN: 6R1/1K6/1P6/8/2r5/5k2/6p1/8 w - - 1 54

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