Dog Sudoku Level 55 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 55 Strategy
Medium Level 55 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 55 Solution
Solution dog cells: R1C2, R1C8, R3C1, R4C8, R5C4, R7C5, R7C7, R8C2.