Cat Sudoku Level 260 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 260 Strategy
Master Level 260 uses a 10x10 board with 10 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 260 Solution
Solution cells: R1C3, R2C7, R3C2, R4C6, R5C8, R6C5, R7C10, R8C1, R9C4, R10C9.