Cat Sudoku Level 54 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 54 Strategy
Medium Level 54 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 54 Solution
Solution cells: R1C7, R2C5, R3C2, R4C6, R5C4, R6C8, R7C3, R8C1.