Cat Sudoku Level 128 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 128 Strategy
Hard Level 128 uses a 8x8 board with 8 colored regions. It starts with 1 fixed cats to anchor the solve. Work from the tightest rows and regions before placing a cat.
Cat Sudoku Level 128 Solution
Solution cells: R1C5, R2C1, R3C6, R4C2, R5C4, R6C7, R7C3, R8C8.