Chess Puzzle #TBiYW — Expert, White to move, endgame

Position

White: king h7; bishop e4; pawns a3/d5/f3/g5. Black: king e7; bishop e2; pawns a5/c4/e5/f4. Material is balanced. White to move.

Solution (4 moves)

1. Opponent setup: c3 — pawn c4→c3. Now White to move.
2. Best move: g6 — pawn g5→g6. Opponent replies c2 (pawn c3→c2).
3. Best move: g7 — pawn g6→g7. Opponent replies c1=Q (pawn c2→c1, promotes to queen).
4. Best move: g8=Q — pawn g7→g8, promotes to queen. Opponent replies Qc7 (queen c1→c7).
5. Best move: Qe6+ — queen g8→e6, gives check.

Tactical themes

advanced pawn, bishop endgame, crushing, endgame, promotion, very long. The key move is g6.

Position data

FEN: 8/4k2K/8/p2Pp1P1/2p1Bp2/P4P2/4b3/8 b - - 0 50

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