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Daily Sudoku Answer 



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Oct 13 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s061521



Reasoning 



R4C6 can only be <5>

R5C6 is the only square in row 5 that can be <6>

R8C2 is the only square in column 2 that can be <9>

R8C5 is the only square in column 5 that can be <5>

R9C6 is the only square in column 6 that can be <3>

R5C4 is the only square in column 4 that can be <3>

R4C4 is the only square in column 4 that can be <7>

R4C5 is the only square in row 4 that can be <9>

R1C4 is the only square in column 4 that can be <9>

R2C5 is the only square in column 5 that can be <3>

R8C8 is the only square in column 8 that can be <1>

Squares R1C5 and R1C6 in row 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <14>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R1C1 - removing <14> from <12456> leaving <256>

R1C3 - removing <14> from <12457> leaving <257>

R1C7 - removing <4> from <2457> leaving <257>

R1C9 - removing <4> from <24567> leaving <2567>

Squares R9C4 and R9C5 in row 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <48>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R9C1 - removing <48> from <1468> leaving <16>

R9C3 - removing <48> from <148> leaving <1>

R9C7 - removing <48> from <4789> leaving <79>

R9C9 - removing <48> from <46789> leaving <679>

R9C1 can only be <6>

R1C9 is the only square in row 1 that can be <6>

R2C8 can only be <8>

R2C2 is the only square in row 2 that can be <6>

R3C1 is the only square in row 3 that can be <1>

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

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

R7C8 is the only square in row 7 that can be <6>

Intersection of column 1 with block 4. The values <48> 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.

R5C2 - removing <4> from <24> leaving <2>

R7C2 can only be <4>

R4C1 can only be <8>

R8C3 can only be <8>

R8C7 can only be <4>

R7C3 can only be <2>

R2C7 can only be <2>

R2C3 can only be <4>

R4C9 can only be <2>

R1C1 is the only square in row 1 that can be <2>

R3C9 is the only square in row 3 that can be <4>

R3C7 is the only square in row 3 that can be <9>

R9C7 can only be <7>

R9C9 can only be <9>

R1C7 can only be <5>

R1C3 can only be <7>

R7C7 can only be <8>

R3C8 can only be <7>

R3C3 can only be <5>

R5C8 can only be <5>

R5C1 can only be <4>

R6C9 can only be <8>

R6C4 can only be <4>

R5C9 can only be <7>

R7C9 can only be <5>

R5C5 can only be <8>

R6C1 can only be <5>

R9C5 can only be <4>

R6C6 can only be <1>

R9C4 can only be <8>

R6C5 can only be <2>

R1C6 can only be <4>

R1C5 can only be <1>



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