Chess Puzzle #iEok4 — Expert, White to move, middlegame

Position

White: king f2; queen e7; rooks e2/h3; bishop c5; pawns a2/e5/f4/h7. Black: king h8; queen a1; rooks d1/f8; bishop g7; pawns a6/b7/f5/g6. Material is balanced. White to move.

Solution (4 moves)

1. Opponent setup: Rg1 — rook d1→g1. Now White to move.
2. Best move: Qxg7+ — queen e7→g7, captures bishop, gives check. Opponent replies Kxg7 (king h8→g7, captures queen).
3. Best move: Bxf8+ — bishop c5→f8, captures rook, gives check. Opponent replies Kf7 (king g7→f7).
4. Best move: e6+ — pawn e5→e6, gives check. Opponent replies Ke8 (king f7→e8).
5. Best move: h8=Q — pawn h7→h8, promotes to queen.

Why this works

White sacrifices the queen with 1.Qxg7+ to eliminate Black's key defensive piece while forcing the king onto g7. After 1...Kxg7, the bishop on f8 delivers check and removes Black's last defender of the promotion square. The discovered attack pattern repeats: 2.Bxf8+ forces the king forward because the h-pawn is unstoppable. Black's king must move away from defending h8; 2...Kf7 3.e6+ pushes the king further, and 3...Ke8 (or any king move) allows 4.h8=Q#. The h-pawn reaches the eighth rank with the king unable to recapture it because it's too far away and the e6 pawn controls potential escape squares. The combination works because each sacrifice removes a defender while leaving White's pawns with an unobstructed path to promotion.

What to practice

Recognize advanced passed pawns as forcing weapons even when defended. Here, the h7-pawn's proximity to promotion justifies two queen and piece sacrifices — trades that look material-costly but mathematically win because the opponent cannot stop both threats (defending the promotion square AND the king's safety). Train yourself to calculate sequences where a passed pawn forces enemy pieces into defensive roles, then exploit that preoccupation with tactical blows that strip away defenders one by one.

Tactical themes

advanced pawn, attraction, crushing, discovered attack, exposed king, middlegame, promotion, very long. The key move Qxg7+ captures with check, forcing a response.

Position data

FEN: 5r1k/1p2Q1bP/p5p1/2B1Pp2/5P2/7R/P3RK2/q2r4 b - - 10 44

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