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Daily Sudoku Answer 



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Jul 19 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s047124



Reasoning 



R6C1 can only be <5>

R8C9 can only be <1>

R4C9 can only be <7>

R2C9 can only be <9>

R5C7 can only be <1>

R5C3 can only be <7>

R1C9 can only be <2>

R6C3 can only be <1>

R6C2 can only be <2>

R3C8 is the only square in row 3 that can be <1>

R3C6 is the only square in row 3 that can be <2>

R4C6 is the only square in row 4 that can be <1>

R6C7 is the only square in row 6 that can be <9>

Squares R2C2 and R4C2 in column 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <36>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R7C2 - removing <36> from <1367> leaving <17>

R8C2 - removing <6> from <679> leaving <79>

R9C2 - removing <36> from <1369> leaving <19>

Intersection of column 2 with block 7. The values <179> only appears in one or more of squares R7C2, R8C2 and R9C2 of column 2. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain these values.

R8C3 - removing <9> from <45689> leaving <4568>

R9C3 - removing <9> from <34569> leaving <3456>

Intersection of column 8 with block 3. The value <3> only appears in one or more of squares R1C8, R2C8 and R3C8 of column 8. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.

R1C7 - removing <3> from <3678> leaving <678>

R2C7 - removing <3> from <35678> leaving <5678>

R3C7 - removing <3> from <368> leaving <68>

R3C3 is the only square in row 3 that can be <3>

R4C3 can only be <6>

R2C2 can only be <6>

R4C2 can only be <3>

R2C1 can only be <8>

R8C1 can only be <6>

R1C3 can only be <9>

R8C8 can only be <4>

R9C1 can only be <3>

R6C8 can only be <8>

R9C7 can only be <6>

R3C7 can only be <8>

R7C7 can only be <3>

R3C5 can only be <6>

R1C7 can only be <7>

R4C8 can only be <5>

R2C7 can only be <5>

R2C8 can only be <3>

R4C7 can only be <4>

R1C8 can only be <6>

R3C4 can only be <9>

R1C4 can only be <8>

R4C5 can only be <8>

R1C6 can only be <3>

R7C4 is the only square in row 7 that can be <6>

R7C2 is the only square in row 7 that can be <1>

R9C2 can only be <9>

R9C6 can only be <4>

R8C2 can only be <7>

R9C3 can only be <5>

R2C6 can only be <7>

R7C5 can only be <7>

R2C4 can only be <4>

R7C6 can only be <8>

R6C5 can only be <4>

R8C4 can only be <5>

R7C3 can only be <4>

R8C6 can only be <9>

R8C3 can only be <8>

R9C4 can only be <1>

R6C4 can only be <7>



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