Dog Sudoku Level 167 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 167 Strategy
Hard Level 167 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 167 Solution
Solution dog cells: R1C4, R1C6, R3C7, R4C1, R5C4, R5C8, R6C2, R6C6, R8C2.