One Crown · Beginner guide

How to play One Crown

One Crown is a logic puzzle about careful placement. Your goal is to find a valid position for every crown using the clues on the board.

The core rules

Every horizontal row must contain exactly one crown.

Every vertical column must contain exactly one crown.

Each colored region must contain exactly one crown.

Crowns cannot occupy adjacent squares, including diagonally adjacent squares.

Look for rows, columns, or colored regions with very few possible crown positions.
Eliminate squares that would place two crowns in the same row, column, or region.
After placing a crown, rule out all immediately neighboring squares, including diagonals.
Repeat until every row, column, and region has exactly one crown.

Remember that diagonal contact counts as touching. A board can look correct by row and column while still breaking the region or adjacency rule.

Start with the most constrained region rather than guessing. See our One Crown strategy tips for more ways to narrow down the possibilities.