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Sudoku Solution Path

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R1C2 is the only square in row 1 that can be <5>
R5C2 is the only square in row 5 that can be <9>
R5C7 is the only square in row 5 that can be <8>
R6C1 is the only square in row 6 that can be <8>
R2C9 is the only square in row 2 that can be <8>
R3C2 is the only square in row 3 that can be <8>
Squares R3C3 and R3C6 in row 3 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 row.
   R3C1 - removing <4> from <49> leaving <9>
   R3C8 - removing <1> from <167> leaving <67>
R2C5 is the only square in row 2 that can be <9>
R1C5 can only be <1>
R1C8 can only be <3>
R3C6 can only be <4>
R1C9 can only be <9>
R7C9 can only be <3>
R3C3 can only be <1>
R2C6 can only be <2>
R2C4 can only be <6>
R5C6 can only be <3>
R2C8 can only be <1>
R7C7 is the only square in row 7 that can be <9>
R2C3 is the only square in column 3 that can be <3>
R2C1 can only be <4>
R8C4 is the only square in column 4 that can be <3>
Squares R5C3 and R5C4 in row 5 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 row.
   R5C5 - removing <24> from <2467> leaving <67>
   R5C8 - removing <24> from <2467> leaving <67>
R6C8 is the only square in column 8 that can be <4>
R4C7 is the only square in block 6 that can be <2>
Squares R8C7 and R8C9 in row 8 form a simple locked pair. These 2 squares both contain the 2 possibilities <67>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R8C1 - removing <7> from <57> leaving <5>
R8C6 can only be <1>
R4C1 can only be <3>
R4C6 can only be <5>
R4C2 can only be <4>
R9C1 can only be <7>
R8C2 can only be <2>
R5C3 can only be <2>
R4C5 can only be <6>
R5C4 can only be <4>
R6C3 can only be <5>
R7C3 can only be <4>
R7C4 can only be <2>
R7C2 can only be <1>
R7C8 can only be <5>
R6C4 can only be <1>
R8C5 can only be <4>
R9C5 can only be <5>
R9C2 can only be <3>
R9C8 can only be <2>
R4C9 can only be <1>
R5C5 can only be <7>
R6C9 can only be <7>
R5C8 can only be <6>
R6C5 can only be <2>
R3C8 can only be <7>
R8C9 can only be <6>
R8C7 can only be <7>
R3C7 can only be <6>


 

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