Cat Sudoku Level 115 Hint
Find a colored region with only a few safe cells, then compare those cells against the row and column limits.
Cat Sudoku Level 115 Strategy
Hard Level 115 uses a 9x9 board with 9 colored regions. It starts without fixed cats, so the region shapes and no-touch rule do the work. Work from the tightest rows and regions before placing a cat.
Cat Sudoku Level 115 Solution
Solution cells: R1C2, R2C5, R3C1, R4C3, R5C6, R6C8, R7C4, R8C7, R9C9.