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Daily Sudoku Answer 



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Feb 11 - Very Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s127172



Reasoning 



R1C2 is the only square in row 1 that can be <3>

R2C5 is the only square in row 2 that can be <3>

R2C3 is the only square in row 2 that can be <4>

R4C1 is the only square in row 4 that can be <2>

R5C4 is the only square in row 5 that can be <4>

R7C1 is the only square in row 7 that can be <3>

R8C8 is the only square in row 8 that can be <4>

R3C1 is the only square in column 1 that can be <6>

R3C8 is the only square in row 3 that can be <9>

R1C3 is the only square in row 1 that can be <9>

R1C8 is the only square in row 1 that can be <2>

R1C7 is the only square in row 1 that can be <6>

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

R8C1 is the only square in row 8 that can be <9>

R9C3 is the only square in row 9 that can be <2>

R8C3 can only be <8>

R8C9 is the only square in row 8 that can be <2>

R2C9 is the only square in column 9 that can be <7>

Squares R4C5 and R8C5 in column 5 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.

R5C5 - removing <15> from <1568> leaving <68>

R6C5 - removing <1> from <168> leaving <68>

Squares R5C5 and R6C5 in block 5 form a simple naked pair. These 2 squares both contain the 2 possibilities <68>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R5C6 - removing <8> from <158> leaving <15>

Intersection of row 7 with block 9. The value <8> only appears in one or more of squares R7C7, R7C8 and R7C9 of row 7. These squares are the ones that intersect with block 9. Thus, the other (non-intersecting) squares of block 9 cannot contain this value.

R9C8 - removing <8> from <1568> leaving <156>

Squares R3C9 and R6C1 form a remote naked pair. <18> can be removed from any square that is common to their groups.

R6C9 - removing <1> from <16> leaving <6>

R6C5 can only be <8>

R6C1 can only be <1>

R5C5 can only be <6>

R2C1 can only be <8>

R5C2 can only be <8>

R3C2 can only be <1>

R3C9 can only be <8>

R7C9 can only be <5>

R7C2 can only be <6>

R4C9 can only be <1>

R4C5 can only be <5>

R5C8 can only be <5>

R5C6 can only be <1>

R2C8 can only be <1>

R7C8 can only be <8>

R2C7 can only be <5>

R9C8 can only be <6>

R8C5 can only be <1>

R1C6 can only be <8>

R8C7 can only be <7>

R9C4 can only be <8>

R8C2 can only be <5>

R9C7 can only be <1>

R9C6 can only be <5>

R1C4 can only be <1>

R9C2 can only be <7>



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