Sudoku Solution Path    Sudoku Puzzle © Kevin Stone R4C4 can only be <7> R7C6 can only be <7> R4C6 can only be <6> R7C4 can only be <3> R4C3 can only be <3> R6C6 can only be <4> R6C4 can only be <5> R7C5 can only be <9> R3C6 can only be <2> R8C5 can only be <6> R4C7 can only be <2> R6C3 can only be <6> R3C4 can only be <4> R5C5 can only be <8> R9C5 can only be <4> R6C7 can only be <3> R2C9 is the only square in row 2 that can be <1> R7C9 can only be <2> R1C8 is the only square in row 1 that can be <2> R2C1 is the only square in row 2 that can be <4> R2C8 is the only square in row 2 that can be <6> R5C8 can only be <7> R8C8 can only be <5> R9C8 can only be <8> R7C7 can only be <1> R7C1 can only be <5> R7C3 can only be <8> R3C1 is the only square in row 3 that can be <6> R3C7 is the only square in row 3 that can be <8> R1C2 is the only square in row 1 that can be <8> R5C2 is the only square in column 2 that can be <5> R5C3 can only be <1> R5C1 can only be <2> R8C1 can only be <3> R8C9 can only be <7> R1C1 can only be <9> R9C2 can only be <7> R8C2 can only be <2> R3C9 can only be <9> R9C7 can only be <6> R9C3 can only be <9> R2C2 can only be <3> R9C1 can only be <1> R9C9 can only be <3> R5C7 can only be <4> R1C9 can only be <4> R1C7 can only be <7> R5C9 can only be <6> R2C5 can only be <7> R3C5 can only be <5> R3C3 can only be <7> R1C5 can only be <3> R1C3 can only be <5>