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Daily Sudoku Answer 



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Sep 20 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s024136



Reasoning 



R7C8 can only be <1>

R8C9 can only be <5>

R7C7 can only be <3>

R6C7 can only be <5>

R9C9 can only be <8>

R7C9 can only be <7>

R6C3 can only be <4>

R7C3 can only be <5>

R3C9 is the only square in row 3 that can be <6>

R5C1 is the only square in row 5 that can be <5>

R6C1 is the only square in row 6 that can be <6>

R7C5 is the only square in row 7 that can be <6>

R7C6 is the only square in row 7 that can be <8>

Squares R2C9 and R3C8 in block 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <49>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R1C9 - removing <4> from <124> leaving <12>

Intersection of row 5 with block 5. The value <7> only appears in one or more of squares R5C4, R5C5 and R5C6 of row 5. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain this value.

R4C5 - removing <7> from <2479> leaving <249>

Intersection of block 7 with column 1. The values <12> only appears in one or more of squares R7C1, R8C1 and R9C1 of block 7. These squares are the ones that intersect with column 1. Thus, the other (non-intersecting) squares of column 1 cannot contain these values.

R1C1 - removing <1> from <1347> leaving <347>

R3C1 - removing <1> from <13478> leaving <3478>

R4C1 - removing <1> from <179> leaving <79>

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

R3C7 can only be <2>

R4C7 can only be <1>

R4C3 can only be <7>

R4C1 can only be <9>

R3C3 can only be <1>

R3C2 can only be <4>

R9C1 can only be <1>

R5C2 can only be <1>

R8C1 can only be <2>

R3C8 can only be <9>

R7C2 can only be <9>

R2C1 can only be <8>

R3C6 can only be <3>

R5C8 can only be <4>

R2C9 can only be <4>

R4C9 can only be <2>

R7C4 can only be <2>

R7C1 can only be <4>

R8C5 can only be <1>

R2C5 can only be <9>

R3C1 can only be <7>

R9C6 can only be <9>

R1C4 can only be <7>

R4C5 can only be <4>

R5C6 can only be <2>

R1C1 can only be <3>

R3C4 can only be <5>

R6C5 can only be <3>

R3C5 can only be <8>

R9C4 can only be <3>

R1C5 can only be <2>

R1C6 can only be <4>

R6C9 can only be <9>

R5C5 can only be <7>

R9C5 can only be <5>

R5C4 can only be <9>

R5C9 can only be <3>



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