2026-10-09 daily answer

Step-by-step reasoning

1. Region 2 has only one safe cell left: R2C2.
2. R2C2 rules out cells in its row, column, color region, and touching neighborhood.
3. Region 1 has only one safe cell left: R1C8.
4. R1C8 rules out cells in its row, column, color region, and touching neighborhood.
5. Region 3 has only one safe cell left: R3C7.
6. R3C7 rules out cells in its row, column, color region, and touching neighborhood.
7. Region 6 has only one safe cell left: R6C1.
8. R6C1 rules out cells in its row, column, color region, and touching neighborhood.
9. Region 7 has only one safe cell left: R7C5.
10. R7C5 rules out cells in its row, column, color region, and touching neighborhood.
11. Row 8 has only one safe cell left: R8C3.
12. R8C3 rules out cells in its row, column, color region, and touching neighborhood.
13. Row 4 has only one safe cell left: R4C4.
14. R4C4 rules out cells in its row, column, color region, and touching neighborhood.
15. Row 5 has only one safe cell left: R5C6.