     Sudoku Solution Path   Sudoku Puzzle © Kevin Stone R1C6 is the only square in row 1 that can be <6> R2C3 is the only square in row 2 that can be <7> R4C1 is the only square in row 4 that can be <4> R4C3 is the only square in row 4 that can be <8> R7C2 is the only square in row 7 that can be <5> R3C8 is the only square in row 3 that can be <5> R1C1 is the only square in row 1 that can be <5> R2C1 is the only square in column 1 that can be <9> R2C5 is the only square in row 2 that can be <8> R3C2 is the only square in row 3 that can be <8> R1C8 is the only square in row 1 that can be <8> R8C1 is the only square in row 8 that can be <8> R9C4 is the only square in row 9 that can be <8> Squares R2C7 and R2C9 in block 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <24>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.    R1C9 - removing <2> from <239> leaving <39>    R3C7 - removing <24> from <2349> leaving <39> Intersection of row 4 with block 6. The value <2> only appears in one or more of squares R4C7, R4C8 and R4C9 of row 4. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain this value.    R5C9 - removing <2> from <23679> leaving <3679> Squares R3C3 and R3C6 in row 3 and R7C3 and R7C6 in row 7 form a Simple X-Wing pattern on possibility <2>. All other instances of this possibility in columns 3 and 6 can be removed.    R9C6 - removing <2> from <124> leaving <14> Squares R5C2 and R5C9 in row 5 and R9C2 and R9C9 in row 9 form a Simple X-Wing pattern on possibility <6>. All other instances of this possibility in columns 2 and 9 can be removed.    R6C9 - removing <6> from <3569> leaving <359>    R8C9 - removing <6> from <369> leaving <39> Squares R1C9 and R8C9 in column 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <39>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.    R4C9 - removing <3> from <235> leaving <25>    R5C9 - removing <39> from <3679> leaving <67>    R6C9 - removing <39> from <359> leaving <5>    R9C9 - removing <3> from <3467> leaving <467> R4C9 can only be <2> R4C7 can only be <3> R2C9 can only be <4> R2C7 can only be <2> R4C5 can only be <5> R3C7 can only be <9> R3C4 can only be <4> R6C7 can only be <6> R1C9 can only be <3> R8C7 can only be <1> R5C9 can only be <7> R7C7 can only be <4> R1C2 can only be <2> R8C9 can only be <9> R3C6 can only be <2> R3C3 can only be <3> R5C8 can only be <9> R9C9 can only be <6> R8C5 can only be <3> R7C8 can only be <3> R9C2 can only be <3> R6C3 can only be <1> R8C3 can only be <6> R5C6 can only be <1> R6C1 can only be <3> R7C3 can only be <2> R9C8 can only be <7> R6C5 can only be <9> R9C1 can only be <1> R5C2 can only be <6> R5C4 can only be <3> R7C6 can only be <9> R9C6 can only be <4> R5C1 can only be <2> R1C5 can only be <1> R7C4 can only be <1> R9C5 can only be <2> R1C4 can only be <9>    