Cat Sudoku Level 135 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 135 Strategy
Hard Level 135 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 135 Solution
Solution cells: R1C5, R2C3, R3C8, R4C6, R5C1, R6C4, R7C7, R8C2.