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 Sudoku Solution Path   R3C3 is the only square in row 3 that can be <3> R3C7 is the only square in row 3 that can be <5> R1C3 is the only square in row 1 that can be <5> R4C5 is the only square in row 4 that can be <5> R8C2 is the only square in column 2 that can be <4> R7C3 is the only square in column 3 that can be <7> R7C4 can only be <4> R1C4 can only be <9> Squares R1C6 and R3C6 in column 6 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 column.    R5C6 - removing <4> from <4678> leaving <678>    R6C6 - removing <4> from <3468> leaving <368>    R8C6 - removing <2> from <237> leaving <37>    R9C6 - removing <2> from <238> leaving <38> R8C5 is the only square in block 8 that can be <2> R8C8 can only be <3> R8C6 can only be <7> Intersection of column 1 with block 4. The value <8> only appears in one or more of squares R4C1, R5C1 and R6C1 of column 1. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain this value.    R5C2 - removing <8> from <2689> leaving <269> Intersection of column 1 with block 7. The values <59> only appears in one or more of squares R7C1, R8C1 and R9C1 of column 1. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain these values.    R9C3 - removing <9> from <29> leaving <2> R4C1 is the only square in column 1 that can be <2> R4C9 can only be <3> R6C9 can only be <4> R6C5 can only be <1> R6C3 can only be <6> R2C5 can only be <7> R4C4 can only be <8> R2C4 can only be <1> R5C5 can only be <4> R4C7 can only be <1> R5C4 can only be <7> R9C4 can only be <3> R5C6 can only be <6> R5C2 can only be <9> R6C6 can only be <3> R6C1 can only be <8> R2C3 can only be <9> R9C6 can only be <8> R5C3 can only be <1> R3C2 can only be <2> R3C6 can only be <4> R3C9 can only be <9> R1C6 can only be <2> R1C9 can only be <6> R1C2 can only be <8> R2C9 can only be <2> R2C8 can only be <8> R1C7 can only be <4> R2C2 can only be <6> R9C7 can only be <9> R5C8 can only be <2> R5C7 can only be <8> R7C8 can only be <5> R7C1 can only be <6> R9C8 can only be <4> R9C1 can only be <5> R8C7 can only be <6> R7C7 can only be <2> R8C1 can only be <9>

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