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 Sudoku Solution Path    R4C4 can only be <5> R9C9 can only be <2> R3C3 is the only square in row 3 that can be <9> R3C2 is the only square in row 3 that can be <1> Intersection of row 3 with block 3. The values <24> only appears in one or more of squares R3C7, R3C8 and R3C9 of row 3. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain these values.    R2C7 - removing <4> from <34568> leaving <3568>    R2C8 - removing <4> from <456> leaving <56> Intersection of block 2 with row 3. The value <6> only appears in one or more of squares R3C4, R3C5 and R3C6 of block 2. These squares are the ones that intersect with row 3. Thus, the other (non-intersecting) squares of row 3 cannot contain this value.    R3C1 - removing <6> from <5678> leaving <578>    R3C7 - removing <6> from <2345678> leaving <234578>    R3C8 - removing <6> from <24567> leaving <2457>    R3C9 - removing <6> from <368> leaving <38> Squares R3C4<68>, R3C6<36> and R3C9<38> in row 3 form a comprehensive locked triplet. These 3 squares can only contain the 3 possibilities <368>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.    R3C1 - removing <8> from <578> leaving <57>    R3C5 - removing <38> from <358> leaving <5>    R3C7 - removing <38> from <234578> leaving <2457> R3C1 can only be <7> R9C1 can only be <5> R1C7 is the only square in row 1 that can be <7> R9C7 can only be <4> R9C3 can only be <7> R3C7 can only be <2> R3C8 can only be <4> R1C3 is the only square in row 1 that can be <5> R5C2 is the only square in row 5 that can be <5> R7C2 is the only square in column 2 that can be <2> R5C8 is the only square in column 8 that can be <2> Intersection of block 4 with column 3. The values <238> only appears in one or more of squares R4C3, R5C3 and R6C3 of block 4. These squares are the ones that intersect with column 3. Thus, the other (non-intersecting) squares of column 3 cannot contain these values.    R2C3 - removing <8> from <468> leaving <46>    R7C3 - removing <8> from <1468> leaving <146>    R8C3 - removing <8> from <1468> leaving <146> Intersection of block 6 with column 7. The values <169> only appears in one or more of squares R4C7, R5C7 and R6C7 of block 6. These squares are the ones that intersect with column 7. Thus, the other (non-intersecting) squares of column 7 cannot contain these values.    R2C7 - removing <6> from <3568> leaving <358>    R7C7 - removing <6> from <3568> leaving <358>    R8C7 - removing <6> from <68> leaving <8> R8C2 can only be <4> R2C2 can only be <8> R2C5 can only be <3> R1C1 can only be <6> R2C7 can only be <5> R3C6 can only be <6> R2C8 can only be <6> R7C7 can only be <3> R2C3 can only be <4> R8C8 can only be <7> R1C9 can only be <8> R3C4 can only be <8> R7C9 can only be <6> R7C1 can only be <8> R7C3 can only be <1> R8C5 can only be <1> R7C8 can only be <5> R3C9 can only be <3> R7C6 can only be <9> R8C3 can only be <6> R5C6 can only be <3> R4C5 can only be <9> R4C7 can only be <1> R6C7 can only be <6> R5C3 can only be <8> R4C6 can only be <2> R6C4 can only be <4> R5C7 can only be <9> R4C3 can only be <3> R6C6 can only be <1> R5C5 can only be <7> R6C3 can only be <2> R5C4 can only be <6> R7C5 can only be <4> R6C5 can only be <8> R7C4 can only be <7>

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