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Sudoku Solution Path

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R1C5 is the only square in row 1 that can be <5>
R9C5 is the only square in row 9 that can be <1>
R7C5 is the only square in column 5 that can be <3>
R5C6 is the only square in column 6 that can be <5>
R3C8 is the only square in column 8 that can be <2>
R3C6 is the only square in row 3 that can be <9>
R6C2 is the only square in column 2 that can be <2>
Squares R1C2 and R1C3 in row 1 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.
   R1C7 - removing <1> from <168> leaving <68>
Squares R5C4 and R5C5 in row 5 form a simple locked pair. These 2 squares both contain the 2 possibilities <47>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R5C1 - removing <7> from <378> leaving <38>
   R5C2 - removing <47> from <13467> leaving <136>
   R5C8 - removing <7> from <3678> leaving <368>
   R5C9 - removing <4> from <1346> leaving <136>
Squares R7C2 and R7C8 in row 7 form a simple locked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R7C4 - removing <6> from <468> leaving <48>
R8C4 is the only square in column 4 that can be <6>
R8C6 is the only square in block 8 that can be <7>
R8C7 can only be <4>
R2C6 can only be <8>
R8C9 can only be <3>
R7C6 can only be <4>
R7C4 can only be <8>
Squares R2C7 and R2C9 in row 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <19>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R2C3 - removing <1> from <123> leaving <23>
   R2C4 - removing <1> from <17> leaving <7>
R5C4 can only be <4>
R3C5 can only be <4>
R3C4 can only be <1>
R5C5 can only be <7>
R3C2 can only be <7>
Squares R1C2 and R4C2 in column 2 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 column.
   R5C2 - removing <1> from <136> leaving <36>
R5C9 is the only square in row 5 that can be <1>
R2C9 can only be <9>
R2C7 can only be <1>
R4C9 can only be <4>
R4C2 can only be <1>
R6C9 can only be <6>
R6C7 can only be <7>
R4C3 can only be <5>
R1C2 can only be <4>
R8C3 can only be <2>
R6C1 can only be <3>
R8C1 can only be <5>
R2C3 can only be <3>
R1C3 can only be <1>
R2C1 can only be <2>
R6C3 can only be <4>
R9C3 can only be <6>
R6C8 can only be <5>
R5C1 can only be <8>
R5C2 can only be <6>
R9C7 can only be <9>
R7C2 can only be <9>
R9C2 can only be <3>
R9C8 can only be <7>
R4C7 can only be <8>
R7C8 can only be <6>
R4C1 can only be <7>
R4C8 can only be <9>
R1C7 can only be <6>
R5C8 can only be <3>
R1C8 can only be <8>


 

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