Cat Sudoku Level 161 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 161 Strategy
Hard Level 161 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 161 Solution
Solution cells: R1C3, R2C7, R3C2, R4C6, R5C8, R6C1, R7C5, R8C9, R9C4.