Cat Sudoku Level 100 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 100 Strategy
Medium Level 100 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 100 Solution
Solution cells: R1C3, R2C8, R3C1, R4C4, R5C6, R6C2, R7C7, R8C5.