Cat Sudoku Level 57 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 57 Strategy
Medium Level 57 uses a 8x8 board with 8 colored regions. It starts with 2 fixed cats to anchor the solve. Work from the tightest rows and regions before placing a cat.
Cat Sudoku Level 57 Solution
Solution cells: R1C7, R2C4, R3C1, R4C6, R5C8, R6C3, R7C5, R8C2.