Cat Sudoku Level 126 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 126 Strategy
Hard Level 126 uses a 9x9 board with 9 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 126 Solution
Solution cells: R1C3, R2C8, R3C5, R4C1, R5C6, R6C4, R7C9, R8C2, R9C7.