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Daily Sudoku Answer 



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Oct 10 - Very Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s160149



Reasoning 



R1C8 can only be <5>

R8C9 can only be <9>

R9C2 can only be <6>

R8C1 can only be <7>

R7C3 can only be <2>

R7C7 can only be <7>

R9C8 can only be <2>

R9C4 can only be <7>

R9C6 can only be <8>

R1C6 is the only square in row 1 that can be <7>

R6C7 is the only square in row 6 that can be <2>

R7C6 is the only square in row 7 that can be <1>

Squares R1C4 and R7C4 in column 4 form a simple naked pair. These 2 squares both contain the 2 possibilities <34>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C4 - removing <34> from <2349> leaving <29>

R3C4 - removing <4> from <4569> leaving <569>

R5C4 - removing <34> from <346> leaving <6>

Squares R2C6 and R5C6 in column 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <34>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R3C6 - removing <4> from <456> leaving <56>

Squares R1C4 and R2C6 in block 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <34>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R2C5 - removing <34> from <2348> leaving <28>

R3C5 - removing <4> from <4568> leaving <568>

Intersection of block 5 with column 5. The values <57> only appears in one or more of squares R4C5, R5C5 and R6C5 of block 5. These squares are the ones that intersect with column 5. Thus, the other (non-intersecting) squares of column 5 cannot contain these values.

R3C5 - removing <5> from <568> leaving <68>

R8C5 - removing <5> from <256> leaving <26>

Squares R1C2 and R5C6 form a remote naked pair. <34> can be removed from any square that is common to their groups.

R5C2 - removing <34> from <348> leaving <8>

R6C9 is the only square in row 6 that can be <8>

R2C9 can only be <4>

R2C6 can only be <3>

R4C9 can only be <3>

R3C7 can only be <8>

R3C5 can only be <6>

R2C1 can only be <9>

R5C6 can only be <4>

R1C4 can only be <4>

R3C6 can only be <5>

R8C5 can only be <2>

R3C4 can only be <9>

R8C6 can only be <6>

R5C7 can only be <1>

R4C7 can only be <4>

R8C4 can only be <5>

R2C5 can only be <8>

R1C2 can only be <3>

R7C4 can only be <3>

R2C4 can only be <2>

R4C1 can only be <6>

R3C3 can only be <4>

R6C3 can only be <7>

R6C1 can only be <3>

R4C2 can only be <5>

R6C5 can only be <5>

R6C8 can only be <6>

R5C3 can only be <9>

R6C2 can only be <4>

R4C5 can only be <7>

R7C5 can only be <4>

R4C8 can only be <9>

R5C5 can only be <3>

R4C3 can only be <1>

R5C8 can only be <7>



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