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 Sudoku Solution Path    R2C1 is the only square in row 2 that can be <2> R6C3 is the only square in row 6 that can be <7> R8C7 is the only square in row 8 that can be <2> R8C3 is the only square in row 8 that can be <6> R9C1 is the only square in row 9 that can be <9> R7C3 is the only square in column 3 that can be <5> R4C7 is the only square in column 7 that can be <5> Intersection of row 2 with block 3. The values <167> only appears in one or more of squares R2C7, R2C8 and R2C9 of row 2. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain these values.    R1C9 - removing <7> from <3478> leaving <348>    R3C9 - removing <17> from <13478> leaving <348> Squares R1C9, R3C9 and R7C9 in column 9 form a simple locked triplet. These 3 squares all contain the 3 possibilities <348>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.    R2C9 - removing <34> from <13467> leaving <167>    R5C9 - removing <4> from <146> leaving <16>    R8C9 - removing <38> from <3578> leaving <57>    R9C9 - removing <38> from <3578> leaving <57> Squares R8C9 and R9C9 in column 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <57>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.    R2C9 - removing <7> from <167> leaving <16> R2C8 is the only square in row 2 that can be <7> R8C8 can only be <3> R2C9 is the only square in row 2 that can be <1> R5C9 can only be <6> R2C7 is the only square in row 2 that can be <6> R8C9 is the only square in row 8 that can be <7> R9C9 can only be <5> R8C5 is the only square in row 8 that can be <5> R5C4 is the only square in row 5 that can be <5> R5C5 is the only square in row 5 that can be <9> R2C2 is the only square in column 2 that can be <3> R2C5 can only be <4> R2C3 can only be <9> R1C5 can only be <3> R9C5 can only be <8> R3C4 is the only square in row 3 that can be <9> R3C6 is the only square in row 3 that can be <1> R5C6 can only be <4> R5C1 can only be <1> R8C1 can only be <8> R6C2 can only be <8> R4C2 can only be <9> R8C2 can only be <1> R4C3 can only be <4> R7C1 can only be <3> R4C8 can only be <1> R3C3 can only be <8> R4C4 can only be <3> R6C8 can only be <4> R6C7 can only be <3> R4C6 can only be <8> R9C4 can only be <7> R6C6 can only be <6> R6C4 can only be <1> R7C6 can only be <2> R3C7 can only be <4> R7C4 can only be <6> R1C6 can only be <7> R9C6 can only be <3> R1C4 can only be <2> R1C1 can only be <4> R3C1 can only be <7> R3C9 can only be <3> R7C7 can only be <8> R1C9 can only be <8> R7C9 can only be <4>