2026-09-20 daily answer

Step-by-step reasoning

1. Region 1 has only one safe cell left: R1C3.
2. R1C3 rules out cells in its row, column, color region, and touching neighborhood.
3. Region 2 has only one safe cell left: R2C1.
4. R2C1 rules out cells in its row, column, color region, and touching neighborhood.
5. Region 7 has only one safe cell left: R7C7.
6. R7C7 rules out cells in its row, column, color region, and touching neighborhood.
7. Region 4 has only one safe cell left: R4C6.
8. R4C6 rules out cells in its row, column, color region, and touching neighborhood.
9. Row 3 has only one safe cell left: R3C4.
10. R3C4 rules out cells in its row, column, color region, and touching neighborhood.
11. Row 5 has only one safe cell left: R5C2.
12. R5C2 rules out cells in its row, column, color region, and touching neighborhood.
13. Row 6 has only one safe cell left: R6C5.