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Sudoku Solution Path

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R5C5 can only be <3>
R5C2 can only be <1>
R2C7 is the only square in row 2 that can be <1>
R4C7 is the only square in row 4 that can be <8>
R7C7 is the only square in row 7 that can be <7>
R6C7 is the only square in column 7 that can be <3>
R8C7 is the only square in block 9 that can be <4>
R5C7 can only be <2>
R8C4 is the only square in row 8 that can be <6>
Squares R8C1 and R8C2 in row 8 form a simple locked pair. These 2 squares both contain the 2 possibilities <39>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R8C3 - removing <39> from <2389> leaving <28>
   R8C6 - removing <39> from <2389> leaving <28>
R9C4 is the only square in block 8 that can be <3>
Squares R8C1 and R8C2 in block 7 form a simple locked pair. These 2 squares both contain the 2 possibilities <39>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.
   R7C2 - removing <9> from <59> leaving <5>
   R9C1 - removing <9> from <579> leaving <57>
   R9C3 - removing <9> from <25789> leaving <2578>
R7C5 can only be <4>
R9C1 can only be <7>
R3C5 can only be <6>
R9C5 is the only square in row 9 that can be <5>
R1C5 can only be <8>
R9C3 is the only square in row 9 that can be <8>
R8C3 can only be <2>
R8C6 can only be <8>
Squares R1C2 and R1C7 in row 1 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.
   R1C1 - removing <9> from <459> leaving <45>
   R1C3 - removing <69> from <4569> leaving <45>
   R1C9 - removing <6> from <2467> leaving <247>
Squares R1C1 and R1C3 in row 1 form a simple locked pair. These 2 squares both contain the 2 possibilities <45>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R1C6 - removing <5> from <257> leaving <27>
   R1C9 - removing <4> from <247> leaving <27>
R2C6 is the only square in column 6 that can be <5>
R2C3 is the only square in row 2 that can be <3>
R3C6 is the only square in row 3 that can be <3>
R1C2 is the only square in block 1 that can be <6>
R1C7 can only be <9>
R9C7 can only be <6>
R9C9 can only be <2>
R9C8 can only be <9>
R1C9 can only be <7>
R1C6 can only be <2>
R7C6 can only be <9>
R3C4 can only be <4>
R3C3 can only be <9>
R3C8 can only be <2>
R2C4 can only be <7>
R7C4 can only be <2>
R6C6 can only be <7>
R4C4 can only be <9>
R4C2 can only be <3>
R4C1 can only be <5>
R8C2 can only be <9>
R8C1 can only be <3>
R4C9 can only be <6>
R1C1 can only be <4>
R4C3 can only be <7>
R2C9 can only be <4>
R6C8 can only be <4>
R6C1 can only be <9>
R6C3 can only be <6>
R6C9 can only be <5>
R2C8 can only be <6>
R5C8 can only be <7>
R1C3 can only be <5>
R5C3 can only be <4>


 

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