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Level 22 guide: Peru (medium)

High Andes, deep history and perfect potatoes. 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 22 About Peru

The board

Step by step

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

Final solution