Dog Sudoku Level 104 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 104 Strategy
Hard Level 104 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 104 Solution
Solution dog cells: R2C2, R2C9, R3C7, R4C1, R4C9, R5C7, R6C1, R6C3, R7C7, R9C2.