Crown Logic
One crown per row, column and colour.
Crown Logic
Place one crown in every row, column and colour region without any two touching — an elegant placement puzzle with 60 levels from 5×5 to 10×10.
About the Game
Crown Logic is a placement logic puzzle from ZOQSY Brain Games, inspired by the classic queens problem. The board is split into coloured regions. Place exactly one crown in each row, each column and each colour region — and no two crowns may touch, not even diagonally. Tap once to rule a cell out with ✕, twice to place a crown, or drag across cells to mark many ✕ at once. Selecting a cell highlights its row, column and region; clashing crowns turn red and the rule they break is shown. The 60 levels grow from 5×5 boards with obvious first moves to 10×10 boards with twisting regions that need careful deduction. Every board was checked by a solver to have exactly one solution, and every one can be solved by logic alone. Hints point to a forced crown or a cell that can be ruled out, and explain why. Undo, redo, restart, stars, best times and saved progress in your browser.
How to Play
Place one crown in every row, every column and every coloured region. Crowns may never touch each other, including diagonally. Tap a cell once to mark it ✕ (no crown here), twice to place a crown and a third time to clear it. Drag to mark several cells with ✕. Small dots show cells already blocked by your crowns. The level is solved when every row, column and region has its crown.
Controls
- Tap or click a cell✕, then crown, then empty
- Drag across cellsMark ✕ on many cells
- Arrow keysMove · C or Q — Crown · X — ✕ · Space — Cycle · Delete — Clear
- Ctrl+Z / Ctrl+YUndo / Redo · H — Hint
Features
- 60 boards in six stages, from 5×5 to 10×10
- Every board checked by a solver to have exactly one solution, solvable by logic
- Row, column and region highlighting with clash detection
- Tap to cycle, drag to mark ✕, full keyboard support, undo and redo
- Hints that explain the next forced crown or ruled-out cell
- Stars, best times and saved progress in your browser
Gameplay Tips
- Start with the smallest region — it has the fewest places for its crown.
- If a region lies entirely in one row, no other crown can use that row.
- Two regions squeezed into the same two columns claim both columns.
- Before placing a crown, check it would not leave a neighbouring region empty.
FAQ
What are the rules of Crown Logic?
Exactly one crown in every row, every column and every colour region, and no two crowns may touch — not even diagonally.
What do the ✕ marks do?
They are your notes: mark cells where a crown cannot go. They do not affect the solution check, and Clear ✕ removes them all.
Does every board have one solution?
Yes. A solver checked every board before release: each has exactly one valid placement and can be solved by logic.
Is my progress saved?
Yes, in your browser on this device: solved levels, stars, best times and an unfinished board you can resume.
