N-Queens Daily
One crown per row, column & color. Every day.
Place one crown on every row, every column, and every colored region of the grid — and no two crowns may touch, not even diagonally. It's a sharper twist on the classic N-Queens problem: solving by color region as well as row and column rewards pattern recognition over brute force, with a fresh, uniquely generated puzzle every day from a 5x5 warm-up to a gnarly 9x9.
How to play
Tap a cell to cycle it through empty, marked (✕), and crowned — use marks to track where a crown can't go.
Place exactly one crown in every row, every column, and every colored region.
Crowns can never touch, not even diagonally — keep going until the whole board checks out.
Why people stick with N-Queens Daily
A new puzzle every day
From a 5x5 warm-up to a gnarly 9x9, every daily puzzle is freshly generated and guaranteed to have exactly one solution.
Streaks & best times
Build a daily streak and track your fastest solve for every puzzle you complete.
Undo, hints, and a full archive
Undo a tap, ask for a hint, or browse the archive to catch up on any past daily puzzle — no pressure, just progress.
Zero ads, zero accounts
No sign-up, no ad breaks, no data leaving your device — just a clean puzzle in a genuine dark-mode design.
Screenshots
Free to play. No ads, ever.
No account needed. Your progress stays on your device.