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 Sudoku Solution Path    R2C5 is the only square in row 2 that can be <8> R2C9 is the only square in row 2 that can be <6> R3C2 is the only square in row 3 that can be <5> R4C1 is the only square in row 4 that can be <6> R6C9 is the only square in row 6 that can be <8> R8C7 is the only square in row 8 that can be <8> R7C4 is the only square in row 7 that can be <8> R7C5 is the only square in row 7 that can be <5> R5C9 is the only square in row 5 that can be <5> R4C4 is the only square in row 4 that can be <5> R8C1 is the only square in row 8 that can be <5> R9C6 is the only square in row 9 that can be <6> R3C5 is the only square in row 3 that can be <6> R7C8 is the only square in row 7 that can be <6> Squares R7C2 and R7C6 in row 7 form a simple locked pair. These 2 squares both contain the 2 possibilities <79>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.    R7C3 - removing <79> from <1479> leaving <14> Squares R5C7 and R7C7 in column 7 form a simple locked pair. These 2 squares both contain the 2 possibilities <14>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.    R3C7 - removing <4> from <234> leaving <23> Squares R2C7 and R3C7 in block 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <23>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.    R1C9 - removing <3> from <347> leaving <47>    R3C8 - removing <3> from <347> leaving <47> Intersection of row 1 with block 2. The value <3> only appears in one or more of squares R1C4, R1C5 and R1C6 of row 1. These squares are the ones that intersect with block 2. Thus, the other (non-intersecting) squares of block 2 cannot contain this value.    R3C4 - removing <3> from <123> leaving <12>    R3C6 - removing <3> from <134> leaving <14> Intersection of row 5 with block 4. The value <9> only appears in one or more of squares R5C1, R5C2 and R5C3 of row 5. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain this value.    R6C1 - removing <9> from <12479> leaving <1247>    R6C2 - removing <9> from <279> leaving <27> R7C2 is the only square in column 2 that can be <9> R7C6 can only be <7> R9C1 can only be <4> R8C5 can only be <3> R8C9 can only be <1> R9C4 can only be <9> R8C3 can only be <7> R7C7 can only be <4> R9C9 can only be <3> R7C3 can only be <1> R5C7 can only be <1> R3C3 can only be <3> R3C7 can only be <2> R2C3 can only be <9> R3C4 can only be <1> R2C7 can only be <3> R2C1 can only be <2> R5C3 can only be <4> R3C6 can only be <4> R3C8 can only be <7> R1C6 can only be <3> R1C9 can only be <4> R5C5 can only be <7> R5C1 can only be <9> R1C4 can only be <2> R4C6 can only be <1> R4C9 can only be <7> R1C1 can only be <7> R6C6 can only be <9> R4C2 can only be <2> R6C1 can only be <1> R6C4 can only be <3> R4C5 can only be <4> R6C2 can only be <7> R4C8 can only be <3> R6C5 can only be <2> R6C8 can only be <4>