Cat Sudoku Level 217 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 217 Strategy
Expert Level 217 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 217 Solution
Solution cells: R1C4, R2C1, R3C8, R4C5, R5C2, R6C9, R7C7, R8C3, R9C6.