Cat Sudoku Level 105 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 105 Strategy
Hard Level 105 uses a 9x9 board with 9 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 105 Solution
Solution cells: R1C9, R2C5, R3C8, R4C2, R5C6, R6C1, R7C3, R8C7, R9C4.