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Daily Sudoku Answer 



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Jul 10 - Very Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s037629



Reasoning 



R1C1 can only be <4>

R1C9 can only be <1>

R3C7 can only be <6>

R5C5 can only be <8>

R1C6 can only be <2>

R2C8 can only be <7>

R4C8 can only be <8>

R6C2 is the only square in row 6 that can be <8>

R7C5 is the only square in row 7 that can be <2>

R7C4 is the only square in row 7 that can be <4>

R2C4 can only be <6>

R2C5 is the only square in row 2 that can be <4>

R7C6 is the only square in row 7 that can be <7>

R3C4 is the only square in row 3 that can be <7>

R3C6 is the only square in row 3 that can be <8>

R9C4 is the only square in row 9 that can be <8>

R9C5 is the only square in row 9 that can be <3>

R1C5 can only be <9>

R8C4 can only be <9>

R1C4 can only be <3>

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

Squares R6C1 and R6C9 in row 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <56>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R6C3 - removing <5> from <1345> leaving <134>

R6C7 - removing <5> from <345> leaving <34>

R6C8 - removing <6> from <136> leaving <13>

Squares R6C9 and R9C9 in column 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <56>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R4C9 - removing <5> from <579> leaving <79>

R5C9 - removing <6> from <679> leaving <79>

Intersection of column 1 with block 4. The values <567> only appears in one or more of squares R4C1, R5C1 and R6C1 of column 1. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain these values.

R4C2 - removing <5> from <25> leaving <2>

R4C3 - removing <5> from <459> leaving <49>

R5C7 is the only square in row 5 that can be <2>

Squares R2C2 and R8C5 form a remote naked pair. <15> can be removed from any square that is common to their groups.

R8C2 - removing <5> from <35> leaving <3>

R8C8 can only be <6>

R5C2 can only be <1>

R7C3 can only be <5>

R9C9 can only be <5>

R9C6 can only be <6>

R6C9 can only be <6>

R7C7 can only be <3>

R5C8 can only be <3>

R2C2 can only be <5>

R5C3 can only be <9>

R6C8 can only be <1>

R6C7 can only be <4>

R6C3 can only be <3>

R4C7 can only be <5>

R6C1 can only be <5>

R3C3 can only be <1>

R2C6 can only be <1>

R8C6 can only be <5>

R3C5 can only be <5>

R8C5 can only be <1>

R4C1 can only be <7>

R5C9 can only be <7>

R4C3 can only be <4>

R5C1 can only be <6>

R4C9 can only be <9>



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