2026-07-20 daily answer

Step-by-step reasoning

1. Region 2 has only one safe cell left: R2C5.
2. R2C5 rules out cells in its row, column, color region, and touching neighborhood.
3. Region 1 has only one safe cell left: R1C7.
4. R1C7 rules out cells in its row, column, color region, and touching neighborhood.
5. Region 3 has only one safe cell left: R3C2.
6. R3C2 rules out cells in its row, column, color region, and touching neighborhood.
7. Region 5 has only one safe cell left: R5C3.
8. R5C3 rules out cells in its row, column, color region, and touching neighborhood.
9. Row 4 has only one safe cell left: R4C6.
10. R4C6 rules out cells in its row, column, color region, and touching neighborhood.
11. Row 6 has only one safe cell left: R6C1.
12. R6C1 rules out cells in its row, column, color region, and touching neighborhood.
13. Row 7 has only one safe cell left: R7C4.