Queens Grid

7×7 Queens Puzzles

785 boards at this size, each needing 7 queens: one per row, one per column, one per colour region, none touching. They run from 8 to 23 deductions.

7 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 7x7 board split into 7 colour regions, needing 7 queens: one per row, one per column, one per region, none touching. Regions run from 1 to 20 cells.

By difficulty

How this board is solved

Solving this 7x7 board takes 9 deductions and needs only the basic deductions, drawing on 3 distinct techniques. The first queen you can place for certain is F7. The queens resolve in the order F7 → E5 → A6 → C1 → D3 → G2 → B4. Every step follows by logic, so you never have to guess.

Techniques this board needs

Full solution, step by step (9 deductions)
  1. Single-cell region essential

    Single-cell region. This colour covers only one cell, so its queen goes there. Place a queen at F7.

  2. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at E5.

  3. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at A6.

  4. Region line lock essential

    Region line lock. This colour must use column 7, so nothing else can. This reasons over column 7. Rules out G4.

  5. Region line lock essential

    Region line lock. This colour must use column 2, so nothing else can. This reasons over column 2. Rules out B1, B2.

  6. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at C1.

  7. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at D3.

  8. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at G2.

  9. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at B4.

Answer: queens at F7, E5, A6, C1, D3, G2, B4.