Cat Sudoku Level 84 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 84 Strategy
Medium Level 84 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 84 Solution
Solution cells: R1C5, R2C7, R3C1, R4C8, R5C4, R6C2, R7C6, R8C3.