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Daily Sudoku Answer 



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Sep 03 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s025937



Reasoning 



R1C5 is the only square in row 1 that can be <8>

R2C3 is the only square in row 2 that can be <3>

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

R3C3 is the only square in row 3 that can be <8>

R3C2 is the only square in row 3 that can be <2>

R9C8 is the only square in row 9 that can be <2>

R9C9 is the only square in row 9 that can be <4>

Squares R2C6 and R2C9 in row 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <59>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R2C1 - removing <9> from <469> leaving <46>

R2C7 - removing <5> from <456> leaving <46>

Squares R4C8 and R5C8 in column 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <47>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R3C8 - removing <47> from <4679> leaving <69>

R7C8 - removing <7> from <679> leaving <69>

Squares R3C4 and R3C8 in row 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R3C1 - removing <69> from <4679> leaving <47>

R3C5 - removing <69> from <569> leaving <5>

R3C7 - removing <6> from <4567> leaving <457>

R2C6 can only be <9>

R2C9 can only be <5>

R3C4 can only be <6>

R3C8 can only be <9>

R7C8 can only be <6>

R6C5 is the only square in row 6 that can be <6>

R8C3 is the only square in column 3 that can be <6>

R7C3 is the only square in column 3 that can be <1>

Squares R4C8 and R5C8 in block 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <47>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R5C7 - removing <47> from <2347> leaving <23>

R6C7 - removing <7> from <2378> leaving <238>

R6C9 - removing <7> from <78> leaving <8>

Squares R7C9 and R8C9 in block 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <79>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C7 - removing <7> from <578> leaving <58>

R8C7 - removing <7> from <578> leaving <58>

Intersection of row 4 with block 5. The values <38> only appears in one or more of squares R4C4, R4C5 and R4C6 of row 4. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain these values.

R5C5 - removing <3> from <13479> leaving <1479>

R5C6 - removing <3> from <357> leaving <57>

R6C6 - removing <3> from <37> leaving <7>

R5C6 can only be <5>

R4C1 is the only square in row 4 that can be <5>

R8C7 is the only square in row 8 that can be <5>

R7C7 can only be <8>

R7C6 can only be <3>

R4C6 can only be <8>

R4C4 can only be <2>

R4C3 can only be <7>

R6C4 can only be <9>

R6C2 can only be <3>

R5C4 can only be <1>

R4C8 can only be <4>

R9C3 can only be <9>

R4C5 can only be <3>

R5C8 can only be <7>

R5C5 can only be <4>

R8C4 can only be <8>

R6C7 can only be <2>

R5C2 can only be <9>

R5C7 can only be <3>

R9C5 can only be <7>

R5C3 can only be <2>

R8C1 can only be <7>

R7C5 can only be <9>

R1C2 can only be <7>

R7C9 can only be <7>

R8C5 can only be <1>

R7C2 can only be <5>

R8C9 can only be <9>

R3C1 can only be <4>

R1C7 can only be <6>

R1C1 can only be <9>

R2C7 can only be <4>

R2C1 can only be <6>

R3C7 can only be <7>



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