Dog Sudoku Level 164 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 164 Strategy
Hard Level 164 uses a 9x9 board with 11 bones. Use the row and column dog counts first, then resolve bones with limited neighboring cells.
Dog Sudoku Level 164 Solution
Solution dog cells: R1C2, R2C8, R3C6, R4C3, R5C6, R5C8, R6C4, R7C2, R7C6, R8C8, R9C6.