Dog Sudoku Level 66 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 66 Strategy
Medium Level 66 uses a 8x8 board with 8 bones. Use the row and column dog counts first, then resolve bones with limited neighboring cells.
Dog Sudoku Level 66 Solution
Solution dog cells: R1C7, R2C2, R3C6, R5C4, R5C8, R6C1, R6C6, R7C8.