Mate in 3: deflection on c1
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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 2212 ShuffleRating — expert level — few solve it at first try.
Black 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 a1, queen b5, rook c2 c6, knight c1, pawn a2 b3 e3 h3 d4 f4 g4.
Black: king g8, queen h1, rook a3 a8, knight e4, pawn d5 g6 h6 f7.
12 white and 9 black pieces are on the board; the puzzle position arises after move 49.
The position in numbers
White are ahead by 3 points of material (29 against 26; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on a1, the black king on g8.
It is Black to move on move 49, with 40 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 7 pawns, Black 4. Files fully open (no pawns of either colour): c — natural highways for the rooks and queen. Half-open for Black: a, b, e.
The Black king has 4 empty squares to step to right now — the fewer they are, the closer a mating net.
Solution & explanation
Main line
49... Qxc1+ 50. Rxc1 Rxa2+ 51. Kb1 Nd2#
Why it works
- Great move! queen to c1 keeps the pressure (#2).
- Well found: rook to a2 (#1).
- Strong! knight to d2 is the sharp choice (#).
- The line ends in a forced mate in 3.
- If instead Rxc1, then Rxa2+ and you stay on top.
Move by move
- 49… Qxc1+ — queen to c1 (capture) with check
- 50. Rxc1 — rook to c1 (capture)
- Rxa2+ — rook to a2 (capture) with check
- 51. Kb1 — king to b1
- Nd2# — knight to d2 and it is checkmate
Types in this puzzle
Knight mate
The knight lands the killing blow from its unique angle.
In a knight mate the final blow comes from the knight — the only piece whose check can never be blocked. That makes it lethal against a cramped king: only a king move or capturing the knight itself can help. The sign: the squares around the king are occupied or covered, and there is a hop from which the knight checks while staying untouchable. Bring the knight over early — it is slower than the long-range pieces, but its strike cannot be parried.
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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