How to Play

Queens is a game of pure combinatorial deduction. No math, no guessing, no arithmetic—just crystal-clear logical deductions. Your mission is to place N Queens onto an N×N board satisfying every rule simultaneously.

01.The Core Objective

On an N×N grid (e.g. 8×8), you must place exactly N Queens on the board. The board is divided into rows, columns, and uniquely colored territories called Regions.

Every puzzle has a single unique mathematical solution. You will never need to make a blind guess—every queen and cross can be deduced using logic alone.

02.The 4 Fundamental Rules

Rule A

1 Queen per Row

Every horizontal row must contain exactly one Queen. Having 0 Queens or 2+ Queens in any row is invalid.

Total queens in any row = 1

Rule B

1 Queen per Column

Every vertical column must contain exactly one Queen. Having 0 Queens or 2+ Queens in any column is invalid.

Total queens in any column = 1

Rule C

1 Queen per Color Region

The board is split into colored zones. Every distinct colored territory must hold exactly one Queen.

Total queens per color region = 1

Rule D

No Queens Can Touch

Two Queens can NEVER touch each other horizontally, vertically, OR diagonally! All 8 adjacent neighbor squares are strictly prohibited.

Queens may share a diagonal only if not touching

Visual Guide: 8 Forbidden Neighbors

Placing a Queen immediately blocks all 8 surrounding cells with an X.

Visual Guide: Valid Solved 4×4

1 per row, 1 per col, 1 per color region, and 0 touching Queens!

03.Controls & Interactions

Single Click / Tap

Places an X marker on an empty cell to eliminate it from consideration.

Double Click / Tap

Places a Queen crown. With Auto-X turned on, surrounding cells auto-fill with X.

Click & Drag

Hold down and drag across multiple cells to paint rapid X markers across an entire line in seconds.

💡 Pro Tip: Toggle the input mode between Cycle, Queen, and Cross from the game toolbar.Undo & Redo buttons available at any time.

04.Master Deduction Strategies

Technique 1

Single-Cell Regions (Instant Placements)

Look across the board for any color region made of just 1 square. That square must contain a Queen! Drop it right away, and immediately cross out its entire row, column, and all 8 surrounding neighbor squares.

Technique 2

Region Bottlenecks & Row/Column Alignment

If all the remaining empty squares of a particular color region fall entirely within a single row or column, that row/column’s Queen is guaranteed to be in that region. You can safely eliminate every other cell in that row or column outside that region!

Technique 3

Corner Adjacency & 2×2 Block Squeeze

When a color territory forms a 2×2 square or sits in a corner, any Queen placed in one square blocks almost all its diagonal neighbors. Look for spots where placing a Queen would wipe out all possibilities in an adjacent color region.

Technique 4

Last Remaining Square (Pigeonhole)

Constantly scan rows and columns. If you have crossed out every cell in a column except one, that remaining cell must be a Queen, regardless of region shape.

05.Game Modes & Arena

Daily Arena

Daily Crown

1 official puzzle released every 24 hours. Compete with global logic solvers on the daily leaderboard.

Synced globally at 00:00 UTC

Solo Training

Practice Boards

Choose from 4×4 up to 10×10. Generate infinite unique puzzles on demand to hone your deduction speed.

Instant procedural generation

Multiplayer

1v1 Battle Duels

Challenge a friend with a private room code or duel online players head-to-head on the identical puzzle board.

Real-time live progress sync

Ready to test your deduction?

Start with Level 1 on the gentle 5×5 board to master row, column, and territory rules.

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