Dog Sudoku Level 170 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 170 Strategy
Hard Level 170 uses a 8x8 board with 9 bones. Use the row and column dog counts first, then resolve bones with limited neighboring cells.
Dog Sudoku Level 170 Solution
Solution dog cells: R1C1, R1C4, R1C7, R3C2, R3C5, R4C8, R7C2, R7C4, R8C6.