Cat Sudoku Level 107 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 107 Strategy
Hard Level 107 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 107 Solution
Solution cells: R1C6, R2C4, R3C2, R4C5, R5C3, R6C8, R7C1, R8C9, R9C7.