Winning blow: knight to g5 (f3·14)
c9-16766naming 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 2150 ShuffleRating — expert level — few solve it at first try.
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 e1, queen e4, rook f1, bishop c3, knight f3, pawn a2 e3 c4 h4.
Black: king h7, queen g8, rook c7, bishop d5, knight b8, pawn h5 d6 g6 a7 e7.
9 white and 10 black pieces are on the board; the puzzle position arises after move 28.
The position in numbers
Black are ahead by 1 points of material (24 against 25; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on e1, the black king on h7.
It is White to move on move 28, with 39 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 4 pawns, Black 5. Files fully open (no pawns of either colour): b, f — natural highways for the rooks and queen. Half-open for White: d, g.
The White king has 4 empty squares to step to right now — the fewer they are, the closer a mating net.
Solution & explanation
Main line
28. Ng5+ Kh6 29. Qf4 Qf7 30. Nxf7+
Why it works
- Best move. knight to g5 is exactly what the engine plays (+6.5).
- queen to f4 develops smoothly.
- Precise: knight to f7 is the top choice (#2).
- You win a piece — the queen.
- If instead Kh6, then Qf4 and you stay on top.
Move by move
- 28. Ng5+ — knight to g5 with check
- Kh6 — king to h6
- 29. Qf4 — queen to f4
- Qf7 — queen to f7
- 30. Nxf7+ — knight to f7 (capture) with check
Types in this puzzle
Discovered attack
A piece steps aside and opens a second attack from the piece behind it.
A discovered attack works like a curtain: one piece steps off the line and unveils the long-range piece behind it. The beauty is that the moving piece can create a second threat of its own — two attacks in one move. Look for your stacked pairs: a bishop or rook behind a knight or pawn, aimed through them at something valuable. Send the front piece to the most aggressive square — a discovery without a second threat wastes half its power.
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.
Double check
Two pieces give check at once — only a king move can answer.
A double check is check from two pieces at once: the one that moved and the one it unveiled. Blocking or capturing is useless against two checks — only a king move helps. Look for a discovered check where the front piece can give check as well. It is the most forcing move in chess: you may even hang your queen with it, because nobody has time to take her.
About this position
These pieces come from starting position #89.
SP-89 · BastionScout — King shifted to c or f, with a knight committed to the corner from move one.
The king starts on f1, the rooks on c1 and g1, the queen on h1.
Castling short simply swaps the two pieces: the king on f1 and the rook on g1 trade places.
The bishops stand on d1 and e1; their long diagonals reach h5 and a5 once the e- and d-pawns step aside.
The second rank carries 2 pawns with no defender at all: a2, b2.
The setup belongs to the BastionScout family; read right to left it becomes position 873.
The engine's main line opens with b4.
Morozov Balance Index: 61 of 100 — class B — balanced. Engine evaluation of the starting position: +23 centipawns for White (depth 42, 400 000 000 nodes).
Explore position #89Provenance
Mined from the project's engine self-play games.
Pack 015 · SP-89
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