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Level 9 guide: Ethiopia (hard)

The birthplace of coffee, on its own calendar. A 9×9 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 9

The board

Step by step

10 deductions lead to the 9 stamps. Each placed stamp also rules out its row, column, touching cells and the rest of its region.

1. The green region has only one cell left: row 3, column 3. Place the stamp there.
2. The rose region and the amber region must all put their stamps in rows 1 and 2, so every other cell in rows 1 and 2 cannot hold a stamp (7 cells ruled out).
3. The teal region has only one cell left: row 4, column 6. Place the stamp there.
4. The periwinkle region has only one cell left: row 5, column 1. Place the stamp there.
5. The pink region has only one cell left: row 6, column 9. Place the stamp there.
6. The amber region has only one cell left: row 2, column 8. Place the stamp there.
7. The peach region has only one cell left: row 7, column 5. Place the stamp there.
8. The rose region has only one cell left: row 1, column 4. Place the stamp there.
9. The mint region has only one cell left: row 8, column 7. Place the stamp there.
10. The stone region has only one cell left: row 9, column 2. Place the stamp there.

Final solution