Queens Grid

8×8 Queens Puzzles

1,616 boards at this size, each needing 8 queens: one per row, one per column, one per colour region, none touching. They run from 9 to 28 deductions.

8 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 8x8 board split into 8 colour regions, needing 8 queens: one per row, one per column, one per region, none touching. Regions run from 1 to 14 cells.

By difficulty

How this board is solved

Solving this 8x8 board takes 9 deductions and needs only the basic deductions, drawing on 4 distinct techniques. The first queen you can place for certain is B6. The queens resolve in the order B6 → A1 → G2 → C3 → D8 → F7 → E4 → H5. 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 B6.

  2. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at A1.

  3. Forced queen essential

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

  4. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at C3.

  5. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at D8.

  6. Region line lock essential

    Region line lock. This colour must use column 8, so nothing else can. This reasons over column 8. Rules out H7.

  7. Last cell in a line essential

    Last cell in a line. Row 7 has one legal cell left, so its queen goes there. Place a queen at F7. This reasons over row 7.

  8. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at E4.

  9. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at H5.

Answer: queens at B6, A1, G2, C3, D8, F7, E4, H5.