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Mate in 3: queen to h5 (d1·3)

Shuffle Rating 1630Theme: Chess960 twist: use the unusual starting setup of the pieces.
White to move — find the best continuation

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The tactical motive

Chess960 twist: use the unusual starting setup of the pieces.

Mate in 3: a forced sequence that ends in checkmate.

Difficulty 1630 ShuffleRating — for advanced tacticians.

White to move — find the best continuation

How to recognize this tactic

In Chess960 the pieces start on unfamiliar squares, so tactics appear earlier and from unusual angles. Do not trust classical patterns — read the actual lines of the bishops, the rooks and the queen from where they really stand in this position.

In a mate in three every move must be forcing; the defender should never get a free tempo. Find the check or threat that herds the king, calculate the single defence to each, and confirm the net closes on the third move.

General method: before you move, list the forcing candidates — every check, every capture, every direct threat — and calculate those first. The solution to a tactic is almost always among them.

Position on the board

White: king g1, queen d1, rook f1 e8, knight c5, pawn a2 b2 c3 d4 h4 f5.

Black: king f7, rook h8, bishop b8 c8, pawn d5 a7 b7 h7.

11 white and 8 black pieces are on the board; the puzzle position arises after move 23.

The position in numbers

White are ahead by 13 points of material (28 against 15; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.

The white king stands on g1, the black king on f7.

It is White to move on move 23, with 47 legal replies to weigh — only the line that keeps the advantage solves the puzzle.

White keeps 6 pawns, Black 4. Files fully open (no pawns of either colour): e, g — natural highways for the rooks and queen.

Black hold the bishop pair, an edge in open lines. The White king has 3 empty squares to step to right now — the fewer they are, the closer a mating net.

Solution & explanation

Main line

23. Qh5+ Kf6 24. Qg5+ Kf7 25. Qe7#

Why it works

  • Best move. queen to h5 is exactly what the engine plays (#2).
  • Spot on — queen to g5 (#1).
  • Precise: queen to e7 is the top choice (#).
  • The line ends in a forced mate in 3.
  • If instead Kf6, then Qg5+ and you stay on top.

Move by move

  • 23. Qh5+ — queen to h5 with check
  • Kf6 — king to f6
  • 24. Qg5+ — queen to g5 with check
  • Kf7 — king to f7
  • 25. Qe7# — queen to e7 and it is checkmate

Types in this puzzle

Ladder mate

Two heavy pieces climb line by line, cutting off every retreat.

The ladder mate uses two heavy pieces climbing rung by rung: one cuts the king off along a line, the other checks on the next line, driving him toward the edge. It is the classic two-rook technique — check, the king retreats one rank, the other rook checks, until mate on the last rank. The only danger is the king creeping close enough to attack one of your rooks. If it does, simply slide that rook to the far side of the same line.

Mate in 3

A forced checkmate in three moves.

Mate in three is a forced staircase: each of your moves narrows the opponent's choices, and the third one ends the game. Look for the start among checks and sacrifices — quiet first moves are rare in mating problems, but deliciously sneaky. Keep the tree in your head: every defense gets its own branch. Do not stop calculating after move two — see the final mating picture with your own eyes.

Counter-strike

Don't defend — answer the threat with a bigger one.

The counter-strike: instead of defending against the threat, you answer with a bigger threat of your own. While your opponent grabs a pawn, you deliver mate — the arithmetic favors you. Look for a counter when direct defenses fail: do you have a check, an attack on the queen, a mating threat? The beginner's error is meeting every threat with a reflexive defense without checking the counterattacking resources first.

About this position

These pieces come from starting position #148.

SP-148 · RampartScout — A knight in the corner and the king out on the wing (b/g); like every family, it is closed under mirror twins.

The king starts on g1, the rooks on d1 and h1, the queen on f1.

The king already stands on its castled square, so castling short moves only the rook, from h1 to f1.

The bishops stand on b1 and c1; their long diagonals reach h7 and h6 once the c- and d-pawns step aside.

Every pawn on the second rank is defended from the very first move.

The setup belongs to the RampartScout family; read right to left it becomes position 814.

The engine's main line opens with e4, putting a pawn straight into the centre.

Morozov Balance Index: 13 of 100 — class D — largest edge. Engine evaluation of the starting position: +41 centipawns for White (depth 47, 400 000 000 nodes).

Explore position #148

Provenance

Mined from the project's engine self-play games.

Pack 012 · SP-148

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