Dog Sudoku Level 222 Hint
Look for bones competing for nearby cells, then compare those options with rows and columns that already have tight dog counts.
Dog Sudoku Level 222 Strategy
Expert Level 222 uses a 9x9 board with 12 bones. Use the row and column dog counts first, then resolve bones with limited neighboring cells.
Dog Sudoku Level 222 Solution
Solution dog cells: R1C6, R2C2, R2C4, R2C8, R4C7, R5C2, R5C5, R6C9, R7C2, R7C5, R8C8, R9C6.