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Daily Sudoku Answer 



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Jul 13 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s041620



Reasoning 



R7C3 can only be <1>

R7C2 can only be <3>

R2C1 is the only square in row 2 that can be <3>

R5C8 is the only square in row 5 that can be <9>

R7C9 is the only square in row 7 that can be <4>

R8C1 is the only square in column 1 that can be <9>

R9C9 is the only square in column 9 that can be <2>

R3C7 is the only square in column 7 that can be <2>

Squares R2C7 and R2C9 in row 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <67>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R2C2 - removing <7> from <147> leaving <14>

R2C5 - removing <6> from <146> leaving <14>

Squares R6C8 and R9C8 in column 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <37>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C8 - removing <7> from <1467> leaving <146>

R3C8 - removing <7> from <147> leaving <14>

R8C8 - removing <7> from <67> leaving <6>

R8C5 can only be <8>

R7C7 can only be <9>

R8C3 can only be <5>

R8C9 can only be <7>

R9C2 can only be <8>

R2C9 can only be <6>

R9C8 can only be <3>

R9C7 can only be <5>

R6C8 can only be <7>

R2C7 can only be <7>

R6C7 can only be <3>

R4C7 can only be <6>

R4C5 is the only square in row 4 that can be <3>

Intersection of row 4 with block 4. The values <57> only appears in one or more of squares R4C1, R4C2 and R4C3 of row 4. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain these values.

R5C1 - removing <5> from <1258> leaving <128>

R5C2 - removing <5> from <15> leaving <1>

R2C2 can only be <4>

R2C5 can only be <1>

R9C5 can only be <9>

R9C6 can only be <7>

R9C4 can only be <1>

R3C6 can only be <4>

R3C5 can only be <5>

R3C8 can only be <1>

R4C6 can only be <8>

R1C8 can only be <4>

R4C1 can only be <5>

R5C6 can only be <6>

R1C6 can only be <9>

R3C1 can only be <8>

R1C5 can only be <6>

R4C2 can only be <7>

R4C3 can only be <4>

R1C2 can only be <5>

R1C4 can only be <7>

R7C5 can only be <2>

R3C3 can only be <7>

R5C1 can only be <2>

R1C3 can only be <2>

R5C4 can only be <5>

R1C1 can only be <1>

R6C3 can only be <8>

R5C9 can only be <8>

R6C4 can only be <2>

R6C9 can only be <5>

R6C5 can only be <4>

R7C4 can only be <6>



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