Queens Grid

Daily Queens Puzzle — March 8, 2026

Sunday · 13×13 · Toughest · Hard · 23 deductions

13 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 13x13 board split into 13 colour regions, needing 13 queens: one per row, one per column, one per region, none touching. Regions run from 1 to 37 cells.

The daily board is the same for everyone and gets harder as the week goes on: Sunday is set to toughest. Every daily puzzle has one solution and needs no guessing.

How this board is solved

Solving this 13x13 board takes 23 deductions and needs expert techniques, including testing a queen, drawing on 9 distinct techniques. The first queen you can place for certain is A1. The queens resolve in the order A1 → L5 → I9 → B7 → H6 → J4 → M2 → C12 → D10 → G8 → K11 → F13 → E3. Every step follows by logic, so you never have to guess.

Techniques this board needs

Full solution, step by step (23 deductions)
  1. Single-cell region essential

    Single-cell region. This colour covers only one cell, so its queen goes there. Place a queen at A1.

  2. Single-cell region essential

    Single-cell region. This colour covers only one cell, so its queen goes there. Place a queen at L5.

  3. Single-cell region essential

    Single-cell region. This colour covers only one cell, so its queen goes there. Place a queen at I9.

  4. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at B7.

  5. Region line lock essential

    Region line lock. This colour must use column 4, so nothing else can. This reasons over column 4. Rules out D2, D3, D4, D6, D8, D12, D13.

  6. Shared diagonal neighbour intermediate

    Shared diagonal neighbour. Every remaining option for this colour touches these cells, so they are out. Rules out E4.

  7. Shared diagonal neighbour intermediate

    Shared diagonal neighbour. Every remaining option for this colour touches these cells, so they are out. Rules out J3.

  8. Shared diagonal neighbour intermediate

    Shared diagonal neighbour. Every remaining option for this colour touches these cells, so they are out. Rules out C10, E10, C11, E11.

  9. Multi-region group lock intermediate

    Multi-region group lock. 3 colours fit in only 3 rows, reserving them. This reasons over row 3 and row 4 and row 2. Rules out C3, G3, H3, C4, G4, H4, C2, E2 and 3 more.

  10. Region line lock essential

    Region line lock. This colour must use row 6, so nothing else can. This reasons over row 6. Rules out E6, F6, G6.

  11. Region line lock essential

    Region line lock. This colour must use column 7, so nothing else can. This reasons over column 7. Rules out G11, G12, G13.

  12. Line uses one region intermediate

    Line uses one region. 1 columns can only be filled by 1 colours, using them up. This reasons over column 3. Rules out E12, E13, F12, H12.

  13. Split-line region lock intermediate

    Split-line region lock. 3 colours fit in only 3 columns, reserving them. This reasons over column 10 and column 13 and column 11. Rules out J6, J11, J12, J13, K10, K12, K13.

  14. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at H6.

  15. Ruled out either way expert

    Ruled out either way. These cells are ruled out no matter where this colour's queen goes. Rules out J2.

  16. Last cell in a line essential

    Last cell in a line. Column 10 has one legal cell left, so its queen goes there. Place a queen at J4. This reasons over column 10.

  17. Last cell in a line essential

    Last cell in a line. Row 2 has one legal cell left, so its queen goes there. Place a queen at M2. This reasons over row 2.

  18. Last cell in a line essential

    Last cell in a line. Row 12 has one legal cell left, so its queen goes there. Place a queen at C12. This reasons over row 12.

  19. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at D10.

  20. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at G8.

  21. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at K11.

  22. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at F13.

  23. Forced queen essential

    Forced queen. This colour has one legal cell left, so its queen goes there. Place a queen at E3.

Answer: queens at A1, L5, I9, B7, H6, J4, M2, C12, D10, G8, K11, F13, E3.