Mate in 3: pin on h8 (b8)
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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.
Pin: a piece can't move without exposing something more valuable behind it.
Difficulty 2234 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.
A pin freezes a piece in front of a more valuable one behind it. Scan the ranks, files and diagonals your bishop, rook or queen controls: if an enemy piece cannot move without exposing its king or queen, it is pinned and can be piled on or bypassed.
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 g4, queen h5, rook b8, bishop e5, pawn g3 a4 d4 h4.
Black: king h7, queen f1, rook f5, bishop c3, pawn f3 c4 a6 e6 h6 g7.
8 white and 10 black pieces are on the board; the puzzle position arises after move 42.
The position in numbers
Black are ahead by 2 points of material (21 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 g4, the black king on h7.
It is White to move on move 42, with 27 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 4 pawns, Black 6. Files fully open (no pawns of either colour): b — natural highways for the rooks and queen. Half-open for White: c, e, f.
The White king has 0 empty squares to step to right now — the fewer they are, the closer a mating net.
Solution & explanation
Main line
42. Rh8+ Kxh8 43. Qxh6+ Kg8 44. Qxg7#
Why it works
- Great move! rook to h8 keeps the pressure (#2).
- Well found: queen to h6 (#1).
- Strong! queen to g7 is the sharp choice (#).
- The line ends in a forced mate in 3.
- If instead Kxh8, then Qxh6+ and you stay on top.
Move by move
- 42. Rh8+ — rook to h8 with check
- Kxh8 — king to h8 (capture)
- 43. Qxh6+ — queen to h6 (capture) with check
- Kg8 — king to g8
- 44. Qxg7# — queen to g7 (capture) and it is checkmate
Types in this puzzle
Supported queen mate
The queen delivers mate face to face, protected by a friend.
The supported queen mate is the most common pattern of all: the queen lands next to the king and mates because a friendly piece or pawn protects her. The king is helpless — capturing is impossible, and the queen covers every neighboring square herself. Hunt for a protected square beside the enemy king: a knight, bishop or pawn eyeing it turns her invasion into mate. Verify one thing — that the square really is defended, or the king eats her.
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.
Win the pinned piece
The pinned piece cannot run — attack it again and win it.
A pinned piece cannot flee, which means you can win it outright by attacking it one more time. Count attackers against defenders: if you outnumber them, the piece is yours. The best extra attacker is a pawn, since it costs less than anything it might capture. Do not rush the capture — build up the pressure first, then harvest.
Provenance
Derived from the Lichess puzzle database (CC0).
Pack 015
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