9×9 Queens Puzzles
2,045 boards at this size, each needing 9 queens: one per row, one per column, one per colour region, none touching. They run from 9 to 30 deductions.
9 queens left to place.
Tap once to rule a cell out, twice to place a queen. Right-click marks an exclusion directly. Arrow keys move between cells.
A 9x9 board split into 9 colour regions, needing 9 queens: one per row, one per column, one per region, none touching. Regions run from 1 to 22 cells.
By difficulty
How this board is solved
Solving this 9x9 board takes 9 deductions and needs only the basic deductions, drawing on 2 distinct techniques. The first queen you can place for certain is E5. The queens resolve in the order E5 → I6 → H1 → C7 → B4 → A2 → G8 → D9 → F3. Every step follows by logic, so you never have to guess.
Techniques this board needs
Full solution, step by step (9 deductions)
- Single-cell region essential
Single-cell region. This colour covers only one cell, so its queen goes there. Place a queen at E5.
- Forced queen essential
Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at I6.
- Forced queen essential
Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at H1.
- Forced queen essential
Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at C7.
- Forced queen essential
Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at B4.
- Forced queen essential
Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at A2.
- Forced queen essential
Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at G8.
- Forced queen essential
Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at D9.
- Forced queen essential
Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at F3.
Answer: queens at E5, I6, H1, C7, B4, A2, G8, D9, F3.