♚Open in the app

Mate in 2: queen to h7 (b1)

Shuffle Rating 1320Theme: Chess960 twist: use the unusual starting setup of the pieces.
White to move — find the best continuation

Solve in the app

The tactical motive

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

Mate in 2: the first move creates an unstoppable threat, the second delivers mate.

A fork made possible by the Chess960 piece placement.

Difficulty 1320 ShuffleRating — club-player level.

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.

Mate in two usually opens with a forcing move — a check, a capture or an unstoppable threat — that strips the king of squares or defenders, so the follow-up mate becomes unavoidable. Look for the first move that leaves the opponent only losing replies.

A set-up fork needs one preparing move before the fork lands — a check that drives the king onto the forking square, or a capture that lines the targets up. Find the preparation first, then the fork it makes possible.

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 b1, rook c1 f1, bishop e1 g2, knight g4 f6, pawn e2 h2 a3 b4.

Black: king g7, queen d7, rook f7, bishop e8 h8, knight e6, pawn d4 a5 b5 g5 d6 h6 e7.

12 white and 13 black pieces are on the board; the puzzle position arises after move 21.

The position in numbers

White are ahead by 5 points of material (35 against 30; 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 g7.

It is White to move on move 21, with 54 legal replies to weigh — only the line that keeps the advantage solves the puzzle.

White keeps 4 pawns, Black 7. Files fully open (no pawns of either colour): c, f — natural highways for the rooks and queen. Half-open for White: d, g.

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

21. Qh7+ Kf8 22. Qxh8#

Why it works

  • Great move! queen to h7 keeps the pressure (#1).
  • Spot on — queen to h8 (#).
  • The line ends in a forced mate in 2.
  • If instead Kf8, then Qxh8# and it is mate.

Move by move

  • 21. Qh7+ — queen to h7 with check
  • Kf8 — king to f8
  • 22. Qxh8# — queen to h8 (capture) and it is checkmate

Types in this puzzle

Mate in 2

A forced checkmate in two moves.

Mate in two: your move, any reply, then the mating blow. Start with the most forcing first moves — checks and sacrifices that shrink the opponent's options to almost nothing. Against every single reply you must have a mate ready, so check them all without exception. The common failure is analyzing the pretty defense and forgetting the boring one.

Setup fork

The random setup allows a fork that classical chess never sees.

A setup fork is a double attack that exists only because of the unusual starting squares — in classical chess these targets never stand side by side. Look for pairs of undefended pieces on your opponent's back rank and for squares from which a knight or pawn hits both at once. Such forks usually appear within the first moves, before the pieces disperse. In every new position, note right away which starting pieces are defended by no one.

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 #107.

SP-107 · BastionGuard — Off-centre king (c/f), no knight on the a- or h-file.

The king starts on f1, the rooks on c1 and g1, the queen on a1.

Castling short simply swaps the two pieces: the king on f1 and the rook on g1 trade places.

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

One second-rank pawn starts with no defender at all: h2.

The setup belongs to the BastionGuard family; read right to left it becomes position 849.

The engine's main line opens with d4, putting a pawn straight into the centre.

Morozov Balance Index: 34 of 100 — class C — noticeable edge. Engine evaluation of the starting position: +31 centipawns for White (depth 46, 400 000 000 nodes).

Explore position #107

Provenance

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

Pack 010 · SP-107

Similar puzzles

In your browser or in the Android app. Nothing to install · Free, no ads

Embed

Copy this code to embed the board on your site: