Dog Sudoku Level 258 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 258 Strategy
Master Level 258 uses a 10x10 board with 13 bones. Use the row and column dog counts first, then resolve bones with limited neighboring cells.
Dog Sudoku Level 258 Solution
Solution dog cells: R1C4, R2C2, R2C8, R2C10, R3C6, R5C9, R6C4, R6C7, R7C10, R8C4, R8C7, R10C7, R10C9.