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Common Answers

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Sudoku Solution Path

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R3C4 is the only square in row 3 that can be <5>
R3C7 is the only square in row 3 that can be <8>
R5C5 is the only square in row 5 that can be <8>
R2C6 is the only square in row 2 that can be <8>
R8C1 is the only square in row 8 that can be <8>
R6C5 is the only square in block 5 that can be <5>
R8C6 is the only square in row 8 that can be <5>
R9C8 is the only square in row 9 that can be <5>
Intersection of row 3 with block 1. The values <27> only appears in one or more of squares R3C1, R3C2 and R3C3 of row 3. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain these values.
   R1C2 - removing <2> from <2346> leaving <346>
Intersection of row 3 with block 3. The value <9> only appears in one or more of squares R3C7, R3C8 and R3C9 of row 3. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.
   R2C9 - removing <9> from <3469> leaving <346>
Intersection of row 5 with block 6. The value <6> only appears in one or more of squares R5C7, R5C8 and R5C9 of row 5. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain this value.
   R4C7 - removing <6> from <346> leaving <34>
   R4C8 - removing <6> from <13469> leaving <1349>
Intersection of row 7 with block 7. The values <159> only appears in one or more of squares R7C1, R7C2 and R7C3 of row 7. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain these values.
   R9C2 - removing <9> from <49> leaving <4>
R1C8 is the only square in row 1 that can be <4>
R2C1 is the only square in row 2 that can be <4>
R8C4 is the only square in column 4 that can be <4>
R8C9 can only be <3>
R8C5 can only be <1>
R2C9 can only be <6>
R7C8 can only be <6>
R2C4 can only be <9>
R3C9 can only be <9>
R3C8 can only be <3>
R4C5 can only be <6>
R2C5 can only be <3>
R9C4 can only be <6>
R3C1 can only be <7>
R4C6 can only be <2>
R1C5 can only be <7>
R6C4 can only be <1>
R9C6 can only be <7>
R1C4 can only be <2>
R9C5 can only be <9>
R1C6 can only be <6>
R7C6 can only be <3>
R1C2 can only be <3>
R3C3 can only be <2>
R3C2 can only be <6>
R6C2 can only be <2>
R5C9 is the only square in row 5 that can be <2>
R5C7 is the only square in row 5 that can be <6>
R5C3 is the only square in row 5 that can be <7>
R6C3 can only be <4>
R6C9 can only be <7>
R4C3 can only be <9>
R6C7 can only be <3>
R7C9 can only be <4>
R7C7 can only be <7>
R4C8 can only be <1>
R7C3 can only be <5>
R5C2 can only be <1>
R4C1 can only be <3>
R5C8 can only be <9>
R5C1 can only be <5>
R7C2 can only be <9>
R4C7 can only be <4>
R7C1 can only be <1>


 

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