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Common Answers

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Sudoku Solution Path

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R3C2 is the only square in row 3 that can be <4>
R7C2 is the only square in row 7 that can be <2>
R7C3 is the only square in row 7 that can be <6>
R8C9 is the only square in row 8 that can be <1>
R1C2 is the only square in column 2 that can be <1>
R3C8 is the only square in column 8 that can be <1>
R4C8 is the only square in column 8 that can be <2>
Intersection of row 9 with block 7. The value <9> only appears in one or more of squares R9C1, R9C2 and R9C3 of row 9. 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 <9> from <479> leaving <47>
   R8C3 - removing <9> from <579> leaving <57>
Intersection of column 2 with block 4. The value <3> only appears in one or more of squares R4C2, R5C2 and R6C2 of column 2. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain this value.
   R4C3 - removing <3> from <3589> leaving <589>
   R6C3 - removing <3> from <35789> leaving <5789>
Intersection of column 9 with block 3. The value <6> only appears in one or more of squares R1C9, R2C9 and R3C9 of column 9. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.
   R2C7 - removing <6> from <3568> leaving <358>
   R3C7 - removing <6> from <369> leaving <39>
R3C4 is the only square in row 3 that can be <6>
R1C5 can only be <3>
R5C5 can only be <7>
R3C6 can only be <7>
R7C6 can only be <4>
R9C5 can only be <5>
R9C2 can only be <9>
R9C9 can only be <3>
R6C5 can only be <6>
R7C4 can only be <7>
R9C8 can only be <7>
R5C9 can only be <8>
R5C1 can only be <9>
R1C9 can only be <6>
R4C5 can only be <4>
R7C8 can only be <8>
R7C7 can only be <5>
R1C8 can only be <9>
R9C1 can only be <4>
R6C8 can only be <3>
R3C7 can only be <3>
R1C1 can only be <8>
R2C9 can only be <5>
R3C3 can only be <9>
R2C7 can only be <8>
R6C7 can only be <9>
R4C7 can only be <6>
R6C2 can only be <5>
R8C7 can only be <4>
R8C1 can only be <7>
R2C1 can only be <6>
R2C3 can only be <3>
R6C4 can only be <1>
R4C2 can only be <3>
R4C3 can only be <8>
R6C6 can only be <8>
R2C4 can only be <2>
R6C3 can only be <7>
R8C3 can only be <5>
R2C6 can only be <1>
R5C4 can only be <3>
R4C6 can only be <9>
R4C4 can only be <5>
R8C6 can only be <3>
R5C6 can only be <2>
R8C4 can only be <9>


 

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