Dog Sudoku Level 137 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 137 Strategy
Hard Level 137 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 137 Solution
Solution dog cells: R1C1, R1C7, R2C4, R3C6, R4C4, R6C5, R6C8, R7C2, R8C4.