Cat Sudoku Level 73 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 73 Strategy
Medium Level 73 uses a 7x7 board with 7 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 73 Solution
Solution cells: R1C3, R2C5, R3C1, R4C4, R5C7, R6C2, R7C6.