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Daily Sudoku Answer 



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Aug 04 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s047487



Reasoning 



R1C1 can only be <8>

R1C3 can only be <2>

R1C7 can only be <1>

R1C4 can only be <3>

R2C2 is the only square in row 2 that can be <3>

R5C3 is the only square in row 5 that can be <9>

R2C7 is the only square in row 2 that can be <9>

R3C8 can only be <5>

R2C9 can only be <8>

R3C2 is the only square in row 3 that can be <9>

R5C7 is the only square in row 5 that can be <8>

R4C8 can only be <2>

R6C8 can only be <3>

R8C8 can only be <9>

R7C8 can only be <8>

R5C6 is the only square in row 5 that can be <3>

R6C3 is the only square in row 6 that can be <1>

R4C9 is the only square in row 4 that can be <1>

R7C4 is the only square in row 7 that can be <9>

R8C7 is the only square in row 8 that can be <3>

R9C3 is the only square in row 9 that can be <8>

R8C4 is the only square in column 4 that can be <2>

R8C5 is the only square in row 8 that can be <4>

R9C9 is the only square in row 9 that can be <2>

Squares R3C5 and R7C5 in column 5 form a simple naked pair. These 2 squares both contain the 2 possibilities <67>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C5 - removing <6> from <26> leaving <2>

R4C5 - removing <7> from <578> leaving <58>

R6C5 - removing <7> from <2578> leaving <258>

R6C6 is the only square in row 6 that can be <2>

Squares R6C2 and R6C5 in row 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <58>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R6C1 - removing <5> from <457> leaving <47>

R6C7 - removing <5> from <457> leaving <47>

Intersection of row 8 with block 7. The value <6> 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.

R7C2 - removing <6> from <56> leaving <5>

R6C2 can only be <8>

R6C5 can only be <5>

R4C2 can only be <6>

R4C5 can only be <8>

R8C9 is the only square in row 8 that can be <5>

R5C9 can only be <7>

R5C4 can only be <4>

R6C7 can only be <4>

R6C1 can only be <7>

R4C7 can only be <5>

R5C1 can only be <5>

R4C4 can only be <7>

R8C1 can only be <6>

R4C3 can only be <4>

R8C3 can only be <7>

R3C3 can only be <6>

R2C1 can only be <4>

R2C6 can only be <6>

R2C3 can only be <5>

R9C6 can only be <7>

R3C5 can only be <7>

R3C6 can only be <4>

R7C5 can only be <6>

R7C7 can only be <7>

R9C7 can only be <6>



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