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Daily Sudoku Answer 



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Aug 26 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s019768



Reasoning 



R4C7 can only be <1>

R1C7 is the only square in row 1 that can be <4>

R1C3 is the only square in row 1 that can be <6>

R1C1 is the only square in row 1 that can be <8>

R2C6 is the only square in row 2 that can be <6>

R3C7 is the only square in row 3 that can be <2>

R5C7 is the only square in row 5 that can be <6>

R7C1 is the only square in row 7 that can be <4>

R7C9 is the only square in row 7 that can be <6>

R7C7 is the only square in row 7 that can be <5>

R6C7 can only be <3>

R9C7 can only be <8>

Squares R4C2 and R4C8 in row 4 form a simple naked pair. These 2 squares both contain the 2 possibilities <79>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R4C3 - removing <79> from <2789> leaving <28>

Intersection of row 1 with block 3. The value <3> only appears in one or more of squares R1C7, R1C8 and R1C9 of row 1. 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 <3> from <1357> leaving <157>

Intersection of row 9 with block 7. The values <27> 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 these values.

R7C3 - removing <7> from <1379> leaving <139>

R8C1 - removing <2> from <29> leaving <9>

R3C3 is the only square in row 3 that can be <9>

R5C3 can only be <2>

R5C4 can only be <1>

R4C3 can only be <8>

R5C6 can only be <4>

R6C5 can only be <8>

R6C3 can only be <7>

R4C5 can only be <2>

R6C8 can only be <5>

R4C2 can only be <9>

R6C2 can only be <4>

R5C8 can only be <9>

R4C8 can only be <7>

R5C2 can only be <5>

R3C5 is the only square in row 3 that can be <4>

R7C5 is the only square in row 7 that can be <9>

R8C4 is the only square in row 8 that can be <2>

R8C6 is the only square in row 8 that can be <8>

R3C4 is the only square in row 3 that can be <8>

R9C1 is the only square in row 9 that can be <2>

R9C2 is the only square in row 9 that can be <7>

R1C2 can only be <1>

R1C8 can only be <3>

R1C9 can only be <7>

R9C8 can only be <1>

R9C3 can only be <3>

R8C9 can only be <3>

R8C5 can only be <1>

R9C9 can only be <9>

R7C3 can only be <1>

R7C6 can only be <7>

R7C4 can only be <3>

R3C6 can only be <1>

R2C5 can only be <3>

R2C4 can only be <7>

R3C9 can only be <5>

R3C1 can only be <7>

R2C9 can only be <1>

R2C1 can only be <5>



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