Nightwatch hints for September 13, 2026

Every square that could light one of these dark squares lies inside this one courtyard, so its lantern is one of them — the rest of the courtyard is out.

Look at the leaf courtyard that includes the square at row 1, column 5.

Every square that could light row 2, column 6 lies in this courtyard, so its lantern is one of them — 2 other squares are out.

Squares this rules out:

• row 1, column 5
• row 3, column 7

12 lanterns, one in each courtyard:

1. row 1, column 2
2. row 2, column 4
3. row 2, column 6
4. row 2, column 9
5. row 3, column 1
6. row 4, column 8
7. row 5, column 3
8. row 6, column 7
9. row 7, column 6
10. row 8, column 1
11. row 8, column 9
12. row 9, column 4