Cat Sudoku Level 230 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 230 Strategy
Expert Level 230 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 230 Solution
Solution cells: R1C8, R2C6, R3C4, R4C1, R5C3, R6C5, R7C7, R8C9, R9C2.