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Daily Sudoku Answer 



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Sep 05 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s229501



Reasoning 



R2C5 can only be <3>

R3C5 can only be <9>

R5C4 is the only square in row 5 that can be <8>

R5C5 is the only square in row 5 that can be <1>

R5C7 is the only square in row 5 that can be <7>

R3C7 can only be <3>

R7C7 can only be <6>

R7C5 can only be <2>

R9C6 can only be <6>

R8C5 can only be <7>

R6C5 can only be <5>

R9C4 can only be <1>

R4C5 can only be <6>

R6C4 is the only square in row 6 that can be <7>

R6C6 is the only square in row 6 that can be <9>

R8C1 is the only square in row 8 that can be <6>

R1C3 is the only square in row 1 that can be <6>

Squares R1C4 and R1C6 in row 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <24>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R1C1 - removing <4> from <13457> leaving <1357>

R1C2 - removing <4> from <1345> leaving <135>

R1C8 - removing <4> from <145> leaving <15>

R1C9 - removing <4> from <14579> leaving <1579>

Squares R1C8 and R8C8 in column 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <15>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C8 - removing <15> from <1458> leaving <48>

R5C8 - removing <5> from <245> leaving <24>

R9C8 - removing <5> from <258> leaving <28>

R4C9 is the only square in block 6 that can be <5>

Intersection of row 2 with block 1. The value <5> only appears in one or more of squares R2C1, R2C2 and R2C3 of row 2. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R1C1 - removing <5> from <1357> leaving <137>

R1C2 - removing <5> from <135> leaving <13>

Squares R8C8<15>, R8C9<19> and R9C7<59> in block 9 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <159>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C9 - removing <1> from <13> leaving <3>

R9C9 - removing <9> from <2389> leaving <238>

R7C3 can only be <4>

R7C1 can only be <1>

R3C3 can only be <7>

R1C1 can only be <3>

R1C2 can only be <1>

R1C8 can only be <5>

R1C7 can only be <9>

R8C8 can only be <1>

R8C9 can only be <9>

R8C2 can only be <5>

R1C9 can only be <7>

R9C7 can only be <5>

R9C1 can only be <7>

R9C3 can only be <3>

R2C2 can only be <4>

R9C2 can only be <9>

R5C3 can only be <5>

R2C8 can only be <8>

R5C2 can only be <3>

R3C1 can only be <8>

R2C1 can only be <5>

R2C9 can only be <1>

R9C8 can only be <2>

R3C9 can only be <4>

R6C9 can only be <2>

R6C1 can only be <4>

R9C9 can only be <8>

R5C8 can only be <4>

R5C6 can only be <2>

R4C1 can only be <2>

R4C4 can only be <4>

R4C6 can only be <3>

R1C4 can only be <2>

R1C6 can only be <4>



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