Cat Sudoku Level 179 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 179 Strategy
Hard Level 179 uses a 9x9 board with 9 colored regions. It starts without fixed cats, so the region shapes and no-touch rule do the work. Work from the tightest rows and regions before placing a cat.
Cat Sudoku Level 179 Solution
Solution cells: R1C1, R2C5, R3C2, R4C9, R5C7, R6C4, R7C8, R8C3, R9C6.