Mate in 3: deflection on a8
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The tactical motive
Deflection: force the defender to abandon its post.
Mate in 3: a forced sequence that ends in checkmate.
Difficulty 2224 ShuffleRating — expert level — few solve it at first try.
White to move — find the best continuation
How to recognize this tactic
Deflection drags a defender away from its duty. Identify the enemy piece that guards a key square or mate, then force it to move — with a check, a capture or a threat it must answer — and strike where it no longer defends.
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 f1, rook c2 a7, knight e6, pawn f2 h2 g3 e5.
Black: king c8, queen g4, rook h7, bishop f3, knight b7, pawn f5 h5 c7.
8 white and 8 black pieces are on the board; the puzzle position arises after move 39.
The position in numbers
Black are ahead by 6 points of material (17 against 23; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on f1, the black king on c8.
It is White to move on move 39, with 30 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 4 pawns, Black 3. Files fully open (no pawns of either colour): a, b, d — natural highways for the rooks and queen. Half-open for White: c.
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
39. Ra8+ Kd7 40. Nf8+ Ke7 41. Rxc7#
Why it works
- Great move! rook to a8 keeps the pressure (#2).
- Well found: knight to f8 (#1).
- Strong! rook to c7 is the sharp choice (#).
- The line ends in a forced mate in 3.
- If instead Kd7, then Nf8+ and you stay on top.
Move by move
- 39. Ra8+ — rook to a8 with check
- Kd7 — king to d7
- 40. Nf8+ — knight to f8 with check
- Ke7 — king to e7
- 41. Rxc7# — rook to c7 (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.
Only move
Everything else loses — find the only move that holds.
An only move is a position where everything loses except one single continuation. You cannot play "by hand" here: run through fundamentally different defenses — run away, block, trade, counterattack — and discard the ones that fail. The hallmark of these puzzles is that the obvious moves lose quickly while the solution often looks strange. First understand exactly what the threat is — then the one saving move reveals itself.
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.
Provenance
Derived from the Lichess puzzle database (CC0).
Pack 015
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