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Sudoku Solution Path

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R1C7 is the only square in row 1 that can be <3>
R2C4 is the only square in row 2 that can be <1>
R4C8 is the only square in row 4 that can be <1>
R4C9 is the only square in row 4 that can be <3>
R5C6 is the only square in row 5 that can be <3>
R6C2 is the only square in row 6 that can be <4>
R7C1 is the only square in row 7 that can be <3>
R8C6 is the only square in row 8 that can be <9>
R6C9 is the only square in row 6 that can be <9>
R8C1 is the only square in row 8 that can be <6>
R4C3 is the only square in row 4 that can be <6>
R5C8 is the only square in row 5 that can be <6>
R2C9 is the only square in row 2 that can be <6>
R6C8 is the only square in column 8 that can be <8>
R1C6 is the only square in column 6 that can be <8>
R4C1 is the only square in column 1 that can be <8>
R5C4 is the only square in row 5 that can be <8>
R1C3 is the only square in block 1 that can be <9>
Squares R5C7 and R6C7 in column 7 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.
   R9C7 - removing <5> from <145> leaving <14>
Squares R2C8 and R3C9 in block 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <25>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.
   R1C8 - removing <25> from <2457> leaving <47>
   R3C8 - removing <25> from <2457> leaving <47>
R2C8 is the only square in column 8 that can be <5>
R3C9 can only be <2>
R8C8 is the only square in column 8 that can be <2>
R8C2 can only be <1>
R8C7 can only be <4>
R9C7 can only be <1>
R7C6 is the only square in row 7 that can be <1>
Squares R2C2 and R2C3 in block 1 form a simple locked pair. These 2 squares both contain the 2 possibilities <28>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.
   R1C1 - removing <2> from <257> leaving <57>
R6C1 is the only square in column 1 that can be <2>
R6C6 can only be <5>
R5C3 can only be <7>
R6C7 can only be <7>
R3C6 can only be <6>
R4C4 can only be <9>
R5C7 can only be <5>
R9C6 can only be <2>
R4C2 can only be <5>
R5C5 can only be <2>
R7C5 can only be <5>
R5C2 can only be <9>
R7C9 can only be <8>
R1C5 can only be <4>
R9C9 can only be <5>
R9C3 can only be <8>
R7C4 can only be <7>
R1C8 can only be <7>
R3C5 can only be <9>
R9C5 can only be <6>
R3C4 can only be <5>
R1C1 can only be <5>
R3C8 can only be <4>
R3C1 can only be <7>
R1C4 can only be <2>
R7C2 can only be <2>
R9C4 can only be <4>
R9C2 can only be <7>
R2C3 can only be <2>
R2C2 can only be <8>


 

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