Winning blow: bishop to d3 (c2·3)
c9-24865naming tag (square·N)Opens in the app if installed, otherwise downloads the APK.
The tactical motive
Chess960 twist: use the unusual starting setup of the pieces.
Winning tactic: there is a move that gains a decisive advantage — find it.
Difficulty 1700 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.
This position hides a concrete tactic that wins material or mates. Start with the most forcing candidate moves — checks, captures and threats — and calculate each to a clear end before choosing; the winning line is usually the one the opponent cannot meet.
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 f1, rook h2, bishop c1 c2, pawn b2 a3 c3.
Black: king g6, queen d7, rook f8 h8, knight c6, pawn d3 g4 b5 c5 a7.
8 white and 10 black pieces are on the board; the puzzle position arises after move 33.
The position in numbers
Black are ahead by 4 points of material (23 against 27; 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 g6.
It is White to move on move 33, with 40 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 3 pawns, Black 5. Files fully open (no pawns of either colour): e, f, h — natural highways for the rooks and queen. Half-open for White: d, g.
White 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
33. Bxd3+ Kg7 34. Qxf8+ Rxf8 35. Rh7+ Kf6 36. Rxd7
Why it works
- Great move! bishop to d3 keeps the pressure (+3.1).
- Well found: queen to f8 (+3.3).
- Strong! rook to h7 is the sharp choice (+3.0).
- Great move! rook to d7 keeps the pressure (+2.8).
- You win a piece — the queen.
- If instead Kg7, then Qxf8+ and you win the rook.
Move by move
- 33. Bxd3+ — bishop to d3 (capture) with check
- Kg7 — king to g7
- 34. Qxf8+ — queen to f8 (capture) with check
- Rxf8 — rook to f8 (capture)
- 35. Rh7+ — rook to h7 with check
- Kf6 — king to f6
- 36. Rxd7 — rook to d7 (capture)
Types in this puzzle
Sacrifice attack
Give up material to unleash a decisive attack.
A sacrificial attack gives up material on purpose to rip the king's shelter open and launch a decisive assault. The sac is sound when you get concrete assets in return: open lines to the king, tempi, pieces ready to pour in. The signs: a poorly sheltered king, your forces aimed at its home, defenders stranded far away. The iron rule is to calculate, not hope — once the material is gone, there is no way back.
Simplification
Trade the heavy pieces and steer into a won endgame.
Simplification is how you convert an advantage: by trading queens and rooks you extinguish the counterplay and steer the game into a won endgame. The rule is simple — the side with extra material trades pieces but keeps pawns. Look for exchanges once the material is already won and your opponent is still rattling threats. The mistake is avoiding the queen trade and letting him muddy the water forever.
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.
About this position
These pieces come from starting position #53.
SP-53 · RampartScout — King on b or g with a knight already on the edge — the least common of the position families (72 in all).
The king starts on g1, the rooks on e1 and h1, the queen on f1.
The king already stands on its castled square, so castling short moves only the rook, from h1 to f1.
The bishops stand on c1 and d1; their long diagonals reach h6 and h5 once the d- and e-pawns step aside.
One second-rank pawn starts with no defender at all: a2.
The setup belongs to the RampartScout family; read right to left it becomes position 906.
The engine's main line opens with e4, putting a pawn straight into the centre.
Morozov Balance Index: 47 of 100 — class C — noticeable edge. Engine evaluation of the starting position: +27 centipawns for White (depth 47, 400 000 000 nodes).
Explore position #53Provenance
Mined from the project's engine self-play games.
Pack 013 · SP-53
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