Cat Sudoku Level 207 Hint
Look for a region whose legal cells are squeezed by two or more neighboring rows. High-level puzzles often move through exclusion, not obvious singles.
Cat Sudoku Level 207 Strategy
Expert Level 207 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 207 Solution
Solution cells: R1C6, R2C4, R3C2, R4C5, R5C8, R6C1, R7C3, R8C7, R9C9.