Queens Game — Complete Rules and Strategy Guide
The Queens puzzle is a region-based logic game built on the classic eight-queens problem. Instead of one big chessboard you get a colourful grid split into irregular coloured regions, and your job is to drop exactly one queen into every row, every column and every region at the same time. On top of that, no two queens may touch — not even diagonally. Three overlapping constraints on one grid is what makes the Queens game so much sharper than plain N-Queens: the board does most of the thinking for you, and every correct placement removes several possibilities at once.
Queens Rules in Five Lines
- Exactly one queen per row. Every horizontal line holds a single queen, no more.
- Exactly one queen per column. Every vertical line holds a single queen, no more.
- Exactly one queen per coloured region. Each colour is a region and holds exactly one queen.
- No touching, ever. Two queens can never be orthogonally or diagonally adjacent — share an edge or a corner and the board is wrong.
- Fill the grid. On an n×n board you place exactly n queens and nothing else. The ✕ tool only marks eliminations; it never counts as a placement.
How the Queens Generator Works
Nothing here is a hand-written puzzle bank. Every board is built on your device the instant you press play. The generator first solves the plain N-Queens problem with randomised backtracking to get a legal queen skeleton, then grows coloured regions outward from those queens with a random multi-source flood fill so each region ends up containing exactly one queen. Finally a second, independent backtracking solver replays the finished grid from scratch and counts solutions. If that count is not exactly one, the grid is rejected and regenerated — you can never be handed a Queens puzzle with two answers or none.
Choosing Your Grid Size
Unlimited mode offers every size from 5×5 to 12×12. A 5×5 board is a two-minute warm-up where one region usually forces the whole solution. At 7×7 and 8×8 you start needing real chaining — a column deduction feeds a region deduction which feeds back into the row. From 9×9 upward the Queens game becomes a genuine brain-burner with dozens of regions, long elimination chains and no room for sloppiness. If you are new, solve three or four 6×6 boards before you jump to 10×10; the technique is identical, only the bookkeeping grows.
Advanced Queens Tactics
- Count free cells per region, not queens. A region with three free cells and no queen yet is a bottleneck; a region with twelve free cells can wait.
- Look for an X trapped against an edge. If an eliminated cell leaves a region with exactly one legal cell left, that cell is a queen — this is the single most common mid-game deduction.
- Track the parity of a row. If a row still needs a queen and three cells are eliminated, the queen sits in one of the rest; compare each candidate's region before committing.
- Cross-check the diagonal rule. A queen near the centre kills eight cells; a queen in a corner kills only three. When two candidate placements are both region-legal, prefer the one with more elimination power.
- Use Undo as an experiment. Place a queen, read the consequences, and undo if the chain dies. Undo never costs you anything and turns silent guessing into visible deduction.
Why Play the Queens Game Unlimited?
A single daily Queens puzzle is a nice ritual but a terrible teacher — you either get it or you look up the answer. Unlimited mode turns the Queens game into a practice gym: pick your size, press New Puzzle, and work a fresh board with its own regions and its own unique solution. Repeat the same deduction patterns across dozens of boards and the daily Queens puzzle stops feeling like a coin flip. This page is completely free, needs no account, and every puzzle is verified unique before it reaches your screen.
