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Sudoku Solution Path

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R7C3 can only be <8>
R7C5 is the only square in row 7 that can be <7>
R7C8 is the only square in row 7 that can be <9>
R5C9 is the only square in row 5 that can be <9>
R8C8 is the only square in row 8 that can be <2>
Squares R2C3 and R3C3 in column 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <37>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.
   R5C3 - removing <37> from <3467> leaving <46>
Squares R2C3 and R3C3 in block 1 form a simple locked pair. These 2 squares both contain the 2 possibilities <37>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.
   R1C1 - removing <7> from <57> leaving <5>
   R2C2 - removing <3> from <3589> leaving <589>
   R3C2 - removing <3> from <389> leaving <89>
R1C9 can only be <3>
R4C9 can only be <8>
R4C5 can only be <6>
R4C2 can only be <3>
R1C5 can only be <2>
R1C6 can only be <7>
R1C4 can only be <6>
R5C8 is the only square in row 5 that can be <3>
R6C2 is the only square in row 6 that can be <2>
R5C6 is the only square in row 5 that can be <2>
R5C4 is the only square in column 4 that can be <7>
R8C7 is the only square in column 7 that can be <8>
R8C4 can only be <3>
Squares R2C2 and R2C4 in row 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <89>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R2C5 - removing <89> from <3489> leaving <34>
   R2C6 - removing <8> from <48> leaving <4>
R2C5 can only be <3>
R8C6 can only be <5>
R9C6 can only be <8>
R9C4 can only be <9>
R2C3 can only be <7>
R2C4 can only be <8>
R3C3 can only be <3>
R2C2 can only be <9>
R3C5 can only be <9>
R3C2 can only be <8>
R9C9 is the only square in row 9 that can be <5>
R6C9 can only be <1>
R7C7 can only be <1>
R7C2 can only be <5>
R2C7 can only be <5>
R2C8 can only be <1>
R5C7 can only be <4>
R5C3 can only be <6>
R3C7 can only be <7>
R4C8 can only be <7>
R3C8 can only be <4>
R4C1 can only be <4>
R6C8 can only be <5>
R5C2 can only be <1>
R8C3 can only be <4>
R6C5 can only be <8>
R8C5 can only be <1>
R9C1 can only be <1>
R8C2 can only be <6>
R9C5 can only be <4>
R5C1 can only be <8>
R5C5 can only be <5>
R6C1 can only be <7>


 

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