2026-07-21 daily answer

Step-by-step reasoning

1. Region 1 has only one safe cell left: R1C6.
2. R1C6 rules out cells in its row, column, color region, and touching neighborhood.
3. Region 4 has only one safe cell left: R4C5.
4. R4C5 rules out cells in its row, column, color region, and touching neighborhood.
5. A cat at R2C1 leaves no valid completion, so exclude it.
6. A cat at R2C2 leaves no valid completion, so exclude it.
7. A cat at R2C3 leaves no valid completion, so exclude it.
8. Row 2 has only one safe cell left: R2C4.
9. R2C4 rules out cells in its row, column, color region, and touching neighborhood.
10. Row 3 has only one safe cell left: R3C1.
11. R3C1 rules out cells in its row, column, color region, and touching neighborhood.
12. A cat at R5C2 leaves no valid completion, so exclude it.
13. A cat at R5C7 leaves no valid completion, so exclude it.
14. Row 5 has only one safe cell left: R5C3.
15. R5C3 rules out cells in its row, column, color region, and touching neighborhood.
16. Row 6 has only one safe cell left: R6C7.
17. R6C7 rules out cells in its row, column, color region, and touching neighborhood.
18. Row 7 has only one safe cell left: R7C2.