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Level 15 guide: Vietnam (medium)

A motorbike, a bowl of pho and a lantern at night. A 7×7 board. Colors are named in the steps below, and rows and columns are counted from the top left starting at 1. This guide spoils the solution, so try the level first.

Play level 15 About Vietnam

The board

Step by step

11 deductions lead to the 7 stamps. Each placed stamp also rules out its row, column, touching cells and the rest of its region.

1. The periwinkle region has only one cell left: row 5, column 6. Place the stamp there.
2. The rose region has only one cell left: row 1, column 7. Place the stamp there.
3. The teal region can only hold its stamp in row 4, so every other cell in row 4 cannot hold a stamp (2 cells ruled out).
4. The peach region can only hold its stamp in row 7, so every other cell in row 7 cannot hold a stamp (3 cells ruled out).
5. The pink region can only hold its stamp in row 6, so every other cell in row 6 cannot hold a stamp (2 cells ruled out).
6. Column 1 can only hold its stamp in the amber region, so the other cells of the amber region cannot hold a stamp (2 cells ruled out).
7. Column 2 has only one cell left: row 4. Place the stamp there.
8. The amber region has only one cell left: row 2, column 1. Place the stamp there.
9. Column 3 has only one cell left: row 6. Place the stamp there.
10. The peach region has only one cell left: row 7, column 5. Place the stamp there.
11. The green region has only one cell left: row 3, column 4. Place the stamp there.

Final solution