Dog Sudoku Level 173 Hint
Find a bone with only two or three available neighboring cells, then test those cells against the row count, column count, and no-touch rule.
Dog Sudoku Level 173 Strategy
Hard Level 173 uses a 9x9 board with 10 bones. Use the row and column dog counts first, then resolve bones with limited neighboring cells.
Dog Sudoku Level 173 Solution
Solution dog cells: R1C3, R1C5, R3C1, R3C3, R3C9, R4C5, R6C3, R8C3, R8C8, R9C1.