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Sudoku Solution Path

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R5C4 can only be <2>
R5C5 can only be <3>
R6C5 can only be <6>
R5C6 can only be <5>
R5C8 can only be <8>
R5C2 can only be <7>
R4C5 can only be <4>
R3C7 is the only square in row 3 that can be <3>
R4C3 is the only square in row 4 that can be <9>
R6C9 is the only square in row 6 that can be <1>
R6C1 is the only square in row 6 that can be <8>
R7C6 is the only square in row 7 that can be <3>
R7C7 is the only square in row 7 that can be <8>
R7C9 is the only square in row 7 that can be <9>
R8C8 is the only square in row 8 that can be <1>
R8C5 is the only square in row 8 that can be <9>
R2C5 can only be <2>
R2C2 can only be <9>
R3C6 can only be <4>
R1C6 can only be <9>
R9C6 can only be <2>
R9C2 is the only square in row 9 that can be <8>
Intersection of row 7 with block 7. The value <5> only appears in one or more of squares R7C1, R7C2 and R7C3 of row 7. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.
   R9C3 - removing <5> from <457> leaving <47>
Squares R2C1 and R2C9 in row 2 and R8C1 and R8C9 in row 8 form a Simple X-Wing pattern on possibility <7>. All other instances of this possibility in columns 1 and 9 can be removed.
   R3C1 - removing <7> from <267> leaving <26>
   R3C9 - removing <7> from <267> leaving <26>
Squares R3C1 and R3C9 in row 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <26>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R3C3 - removing <2> from <127> leaving <17>
Squares R1C2 and R3C1 in block 1 form a simple locked pair. These 2 squares both contain the 2 possibilities <26>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.
   R1C3 - removing <2> from <1247> leaving <147>
R6C3 is the only square in column 3 that can be <2>
R6C7 can only be <5>
R4C1 can only be <5>
R7C3 is the only square in row 7 that can be <5>
R9C8 is the only square in row 9 that can be <5>
R2C8 can only be <4>
R2C1 can only be <7>
R1C8 can only be <6>
R1C2 can only be <2>
R3C9 can only be <2>
R2C9 can only be <5>
R3C3 can only be <1>
R3C4 can only be <7>
R1C3 can only be <4>
R1C4 can only be <1>
R3C1 can only be <6>
R4C9 can only be <6>
R1C7 can only be <7>
R4C7 can only be <2>
R8C9 can only be <7>
R9C7 can only be <6>
R9C4 can only be <4>
R8C2 can only be <6>
R9C3 can only be <7>
R7C1 can only be <4>
R8C1 can only be <2>
R7C4 can only be <6>


 

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