Cat Sudoku Level 39 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 39 Strategy
Medium Level 39 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 39 Solution
Solution cells: R1C5, R2C8, R3C1, R4C3, R5C7, R6C4, R7C2, R8C6.