What is the Queens Puzzle?
The queens puzzle is a logic puzzle played on a coloured grid. Your goal is to place exactly one queen in each row, each column, and each coloured region — with the added constraint that no two queens can touch, even diagonally. It's a satisfying blend of constraint satisfaction and spatial reasoning, where every puzzle has exactly one solution discoverable through pure logic.
How to play
Study the grid
Each NxN grid is divided into N coloured regions of N cells each. Your job is to place N queens — one per region.
Place queens
Tap a cell to place a queen. Tap again to mark it as excluded. Tap once more to clear it. Use marks to track cells you've ruled out.
Respect the constraints
No two queens can share the same row, column, or region. And no two queens can be adjacent — not even diagonally. All eight surrounding cells must be queen-free.
Solve through logic
Every puzzle has exactly one solution. Work through the constraints methodically — if a row has only one valid cell left, place the queen. No guessing needed.
The best way to play
reina is built from the ground up for this puzzle. Tap to place, tap to mark, tap to clear. The interface stays out of your way so you can focus on the logic.
- 340+ unique puzzles from 5x5 to 9x9
- Daily challenges with streak tracking
- Smart hints that guide without spoiling
- Works offline — no internet required
- No ads, no in-app purchases
Ready to try reina?
Download reina and start solving today.
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