Q-GAMBIT: HOW TO PLAY
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I’m QUBE. Let’s read the piece candidates and work through the ideas together.
Welcome to Q-GAMBIT! In this unique chess variant, the true identity of every piece is hidden at the start. Deduction, bluffing, and keeping your King hidden are the keys to victory.
Understand your first move
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Read the starting steps, learn to read candidates and try short exercises before signing in.
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1. Identities are hidden until they move
At the start of the game, all pieces look exactly the same. No one knows which piece is the Rook, Knight, or Bishop.
If a piece has only bishop, rook and queen candidates, moving it diagonally along a clear path removes rook. Bishop and queen remain until further moves or constraints resolve the identity.
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How each piece moves
The piece starts at the center. Gold squares are possible destinations on an empty board. Sliding pieces stop at blockers; only the Knight jumps over them.
The Pawn diagram shows White moving upward. It moves forward one square, or two from its starting row; it captures one square diagonally forward (×). Black moves in the opposite direction.
The diagrams show ordinary moves. Castling, en passant and promotion require additional conditions.
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2. Revealing the True Identity
Every time you move a piece, its possible identities are narrowed down.
- Validating the Move: If the piece's remaining possibilities include a piece that can make the requested move, the move succeeds.
- Filtering Possibilities: Any identity that cannot make that move is permanently eliminated.
- Revealing (Flipping): When only ONE possible identity remains (e.g., it has moved exactly like a Knight), its true identity is permanently revealed to both players.
Crucial Rule: If you attempt a move that is impossible for ALL remaining identities of that piece, the move will be rejected.
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One move can eliminate candidates
On an open board, e4 → h7 is three squares diagonally: Bishop or Queen remain. A later h7 → h5 is two squares straight: only Queen remains.
Identity slots per side (16 pieces)
These are identity limits for the 16 starting pieces, not the number still on the board. Captured pieces remain part of the identity-constraint calculation.
Because each side has just one Queen slot, a second piece with only Rook or Queen left then becomes a Rook without moving.
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3. Winning the Game & Strategy
In ordinary chess the King is not physically captured: checkmate ends the game. In Q-Gambit, capturing the last living King candidate or checkmating a confirmed King can end it.
Master Strategy: Hide Your King
The most important strategy in Q-GAMBIT is to keep your King's identity a secret.
- Bluffing: Move a different piece as if it were your King to draw enemy attacks.
- Chain Reactions: If a piece is revealed to be a Queen, the game knows no other piece can be a Queen, which might instantly reveal the identities of other pieces!
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King capture and checkmate are different finishes
Schematic: ? is a hidden opposing piece that may be the last living King candidate. If capturing it leaves no such candidate, the game ends; if others remain, play continues.
A confirmed King also loses when it is attacked and no legal move can escape. In this simplified position, the two white Rooks cover a8, a7 and b8.
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4. Capturing and Promotion
Schematic: ? is a hidden opposing piece that may be the last living King candidate. If capturing it leaves no such candidate, the game ends; if others remain, play continues.
Promotion: If a piece reaches the opposite end of the board AND it still has the possibility of being a Pawn, it is revealed as a Pawn and promoted (e.g., to a Queen).
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5. About the Game
Q-GAMBIT combines the mechanics of chess with deduction and hidden information.
Test your logic and bluffing skills against our AI or challenge players worldwide in Online mode!
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