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Daily Sudoku Answer 



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Sep 01 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s010611



Reasoning 



R9C4 can only be <1>

R9C5 can only be <4>

R5C5 is the only square in row 5 that can be <1>

R1C5 can only be <3>

R4C4 is the only square in row 4 that can be <3>

R6C3 is the only square in row 6 that can be <7>

R7C3 is the only square in row 7 that can be <4>

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

R2C2 is the only square in row 2 that can be <4>

R6C9 is the only square in column 9 that can be <8>

R4C6 is the only square in column 6 that can be <8>

R4C7 is the only square in row 4 that can be <5>

Squares R1C6 and R2C6 in column 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <15>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R6C6 - removing <5> from <259> leaving <29>

R6C4 is the only square in row 6 that can be <5>

Squares R3C4 and R3C5 in row 3 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.

R3C7 - removing <7> from <12367> leaving <1236>

Intersection of row 7 with block 8. The value <9> only appears in one or more of squares R7C4, R7C5 and R7C6 of row 7. These squares are the ones that intersect with block 8. Thus, the other (non-intersecting) squares of block 8 cannot contain this value.

R8C4 - removing <9> from <79> leaving <7>

R8C8 can only be <6>

R3C4 can only be <9>

R5C8 can only be <2>

R3C5 can only be <7>

R1C8 can only be <5>

R1C6 can only be <1>

R1C3 can only be <2>

R2C6 can only be <5>

R3C2 can only be <5>

R9C2 can only be <8>

R9C7 can only be <3>

R5C2 can only be <9>

R9C3 can only be <5>

R7C8 can only be <7>

R5C7 can only be <6>

R8C2 can only be <2>

R4C3 can only be <6>

R5C3 can only be <8>

R6C7 can only be <9>

R6C6 can only be <2>

R7C7 can only be <1>

R2C8 can only be <3>

R8C1 can only be <1>

R4C1 can only be <2>

R2C3 can only be <1>

R6C5 can only be <6>

R7C6 can only be <9>

R4C5 can only be <9>

R7C5 can only be <2>

R7C1 can only be <3>

R7C9 can only be <5>

R2C7 can only be <7>

R3C7 can only be <2>

R8C7 can only be <8>

R8C3 can only be <9>

R2C9 can only be <6>

R3C3 can only be <3>

R3C9 can only be <1>

R3C1 can only be <6>



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