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Daily Sudoku Answer 



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Sep 19 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s036210



Reasoning 



R2C5 is the only square in row 2 that can be <8>

R4C1 is the only square in row 4 that can be <8>

R7C9 is the only square in row 7 that can be <1>

R7C8 is the only square in row 7 that can be <8>

R8C7 is the only square in row 8 that can be <9>

R1C4 is the only square in row 1 that can be <9>

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

R3C9 is the only square in row 3 that can be <9>

R5C4 is the only square in row 5 that can be <1>

R6C7 is the only square in row 6 that can be <1>

R6C9 is the only square in row 6 that can be <4>

R1C8 is the only square in block 3 that can be <3>

Intersection of row 1 with block 1. The value <7> only appears in one or more of squares R1C1, R1C2 and R1C3 of row 1. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R3C1 - removing <7> from <34567> leaving <3456>

Intersection of row 6 with block 5. The value <7> only appears in one or more of squares R6C4, R6C5 and R6C6 of row 6. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain this value.

R4C4 - removing <7> from <567> leaving <56>

R4C5 - removing <7> from <23679> leaving <2369>

Squares R4C4 and R4C7 in row 4 form a simple naked pair. These 2 squares both contain the 2 possibilities <56>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R4C3 - removing <56> from <23569> leaving <239>

R4C5 - removing <6> from <2369> leaving <239>

R4C8 - removing <5> from <57> leaving <7>

R4C9 - removing <6> from <367> leaving <37>

R4C9 can only be <3>

R9C8 can only be <4>

R5C9 can only be <6>

R2C9 can only be <2>

R4C7 can only be <5>

R9C7 can only be <2>

R2C8 can only be <5>

R2C3 can only be <6>

R9C9 can only be <7>

R4C4 can only be <6>

R2C4 can only be <4>

R1C2 can only be <4>

R9C4 can only be <5>

R9C3 can only be <3>

R7C4 can only be <7>

R1C7 can only be <6>

R8C2 can only be <8>

R3C7 can only be <4>

R7C3 can only be <5>

R8C6 can only be <2>

R8C5 can only be <4>

R5C6 can only be <5>

R9C2 can only be <6>

R6C6 can only be <7>

R3C6 can only be <6>

R6C3 can only be <9>

R8C1 can only be <7>

R7C5 can only be <6>

R9C6 can only be <8>

R7C1 can only be <4>

R3C5 can only be <7>

R6C5 can only be <3>

R4C3 can only be <2>

R6C2 can only be <5>

R5C5 can only be <2>

R1C1 can only be <2>

R1C3 can only be <7>

R5C1 can only be <3>

R4C5 can only be <9>

R3C1 can only be <5>

R6C1 can only be <6>

R3C2 can only be <3>



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