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Mate in 3: queen to e6 (f5·2)

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 e1, queen f5, rook g1 b7, bishop e4, knight f1, pawn a2 d2 h2 c3 e3 g4 c5.

Black: king a6, queen b8, rook f8, bishop a4 d4, pawn a5.

13 white and 6 black pieces are on the board; the puzzle position arises after move 26.

The position in numbers

White are ahead by 11 points of material (32 against 21; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.

The white king stands on e1, the black king on a6.

It is White to move on move 26, with 52 legal replies to weigh — only the line that keeps the advantage solves the puzzle.

White keeps 7 pawns, Black 1. Files fully open (no pawns of either colour): b, f — natural highways for the rooks and queen.

Black hold the bishop pair, an edge in open lines. The White king has 2 empty squares to step to right now — the fewer they are, the closer a mating net.

Solution & explanation

Main line

26. Qe6+ Qd6 27. Qxd6+ Bc6 28. Qxc6#

Why it works

  • Best move. queen to e6 is exactly what the engine plays (#2).
  • Spot on — queen to d6 (#1).
  • Precise: queen to c6 is the top choice (#).
  • The line ends in a forced mate in 3.
  • If instead Qd6, then Qxd6+ and you win the queen.

Move by move

  • 26. Qe6+ — queen to e6 with check
  • Qd6 — queen to d6
  • 27. Qxd6+ — queen to d6 (capture) with check
  • Bc6 — bishop to c6
  • 28. Qxc6# — queen to c6 (capture) 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 #219.

SP-219 · ThroneScout — Centre-file king, rim knight: 204 of the 960 positions share this pattern.

The king starts on d1, the rooks on c1 and g1, the queen on b1.

Castling long simply swaps the two pieces: the king on d1 and the rook on c1 trade places.

A bishop starts in the corner on h1: it has a single diagonal, which the g-pawn unlocks, running out to a8.

The pawn on e2 is defended by the king alone — the same soft spot f2 is in the classical setup.

The setup belongs to the ThroneScout family; read right to left it becomes position 641.

The engine's main line opens with c3.

Morozov Balance Index: 55 of 100 — class B — balanced. Engine evaluation of the starting position: +25 centipawns for White (depth 46, 400 000 000 nodes).

Explore position #219

Provenance

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

Pack 012 · SP-219

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