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Level 16 guide: Indonesia (medium)

Over seventeen thousand islands. 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 16

The board

Step by step

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

Final solution