Cat Sudoku Level 167 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 167 Strategy
Hard Level 167 uses a 8x8 board with 8 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 167 Solution
Solution cells: R1C8, R2C4, R3C6, R4C3, R5C5, R6C1, R7C7, R8C2.