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Sudoku Solution Path

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R2C6 can only be <5>
R8C6 can only be <8>
R2C4 can only be <3>
R3C6 can only be <1>
R5C6 can only be <7>
R5C8 can only be <2>
R6C6 can only be <4>
R6C5 can only be <3>
R3C5 can only be <2>
R4C5 can only be <6>
R7C5 can only be <7>
R5C4 can only be <1>
R5C2 can only be <6>
R4C4 can only be <5>
R2C9 is the only square in row 2 that can be <4>
R4C8 is the only square in row 4 that can be <4>
R6C8 is the only square in row 6 that can be <8>
R1C9 is the only square in row 1 that can be <8>
R1C7 is the only square in row 1 that can be <2>
R7C2 is the only square in row 7 that can be <4>
R7C1 is the only square in row 7 that can be <3>
R1C2 is the only square in row 1 that can be <3>
R9C3 is the only square in row 9 that can be <8>
Intersection of row 8 with block 7. The value <9> only appears in one or more of squares R8C1, R8C2 and R8C3 of row 8. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.
   R9C1 - removing <9> from <1269> leaving <126>
   R9C2 - removing <9> from <129> leaving <12>
Intersection of column 3 with block 4. The value <7> only appears in one or more of squares R4C3, R5C3 and R6C3 of column 3. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain this value.
   R6C1 - removing <7> from <1257> leaving <125>
Intersection of column 3 with block 7. The value <6> only appears in one or more of squares R7C3, R8C3 and R9C3 of column 3. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.
   R8C1 - removing <6> from <2569> leaving <259>
   R9C1 - removing <6> from <126> leaving <12>
Squares R9C1 and R9C2 in row 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <12>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.
   R9C7 - removing <1> from <1679> leaving <679>
   R9C9 - removing <12> from <127> leaving <7>
R3C8 is the only square in column 8 that can be <7>
R2C7 can only be <6>
R2C1 can only be <7>
R9C7 can only be <9>
R9C8 can only be <6>
R3C7 can only be <3>
R7C8 can only be <5>
R3C9 can only be <5>
R3C2 can only be <9>
R8C9 can only be <2>
R1C8 can only be <9>
R8C4 can only be <6>
R7C9 can only be <1>
R3C1 can only be <6>
R4C2 can only be <1>
R4C7 can only be <7>
R4C9 can only be <3>
R9C2 can only be <2>
R4C3 can only be <9>
R6C7 can only be <1>
R7C3 can only be <6>
R7C4 can only be <2>
R9C1 can only be <1>
R6C2 can only be <5>
R8C3 can only be <5>
R6C1 can only be <2>
R6C3 can only be <7>
R8C1 can only be <9>
R1C3 can only be <1>
R1C1 can only be <5>


 

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