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Sudoku Solution Path

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R1C8 is the only square in row 1 that can be <2>
R1C6 is the only square in row 1 that can be <3>
R2C9 is the only square in row 2 that can be <1>
R2C1 is the only square in row 2 that can be <2>
R2C8 is the only square in row 2 that can be <3>
R9C4 is the only square in column 4 that can be <1>
R7C7 is the only square in row 7 that can be <1>
R5C4 is the only square in column 4 that can be <7>
R5C6 is the only square in column 6 that can be <8>
R9C6 is the only square in column 6 that can be <2>
R9C7 is the only square in column 7 that can be <7>
R1C3 is the only square in column 3 that can be <7>
R5C7 is the only square in column 7 that can be <9>
R4C8 can only be <8>
R9C2 is the only square in row 9 that can be <8>
R6C1 is the only square in row 6 that can be <8>
R8C9 is the only square in row 8 that can be <8>
R3C9 is the only square in column 9 that can be <5>
Squares R3C1 and R3C3 in row 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <49>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R3C5 - removing <49> from <4689> leaving <68>
R2C4 is the only square in block 2 that can be <9>
Squares R1C2 and R2C2 in column 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <56>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
   R8C2 - removing <5> from <579> leaving <79>
Intersection of block 5 with column 5. The values <126> only appears in one or more of squares R4C5, R5C5 and R6C5 of block 5. These squares are the ones that intersect with column 5. Thus, the other (non-intersecting) squares of column 5 cannot contain these values.
   R1C5 - removing <6> from <4568> leaving <458>
   R3C5 - removing <6> from <68> leaving <8>
   R7C5 - removing <6> from <469> leaving <49>
R3C7 can only be <6>
R1C7 can only be <8>
R7C9 is the only square in row 7 that can be <6>
R5C9 can only be <2>
R5C5 can only be <6>
R4C9 can only be <7>
R4C1 can only be <9>
R6C9 can only be <4>
R6C5 can only be <1>
R6C2 can only be <7>
R4C5 can only be <2>
R6C8 can only be <6>
R4C2 can only be <1>
R3C1 can only be <4>
R8C2 can only be <9>
R8C8 can only be <4>
R8C4 can only be <6>
R9C8 can only be <9>
R3C3 can only be <9>
R7C1 can only be <3>
R7C3 can only be <4>
R5C1 can only be <5>
R7C5 can only be <9>
R9C3 can only be <5>
R8C6 can only be <5>
R1C4 can only be <4>
R8C1 can only be <7>
R2C6 can only be <6>
R9C5 can only be <4>
R5C3 can only be <3>
R1C5 can only be <5>
R1C2 can only be <6>
R2C2 can only be <5>


 

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