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Daily Sudoku Answer 



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Jan 06 - Very Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s323763



Reasoning 



R1C6 can only be <3>

R5C5 can only be <9>

R8C7 can only be <2>

R1C3 can only be <7>

R1C7 can only be <8>

R1C4 can only be <5>

R8C6 can only be <7>

R4C3 is the only square in row 4 that can be <5>

R7C6 is the only square in row 7 that can be <2>

R7C8 is the only square in row 7 that can be <5>

Squares R7C5 and R8C4 in block 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <18>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C4 - removing <18> from <1348> leaving <34>

Squares R2C4<49>, R2C6<469> and R3C6<469> in block 2 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <469>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R3C4 - removing <49> from <1489> leaving <18>

Squares R2C3<346>, R5C3<34> and R9C3<46> in column 3 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <346>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R6C3 - removing <3> from <138> leaving <18>

Squares R2C3 and R2C7 in row 2 and R5C3 and R5C7 in row 5 form a Simple X-Wing pattern on possibility <3>. All other instances of this possibility in columns 3 and 7 can be removed.

R6C7 - removing <3> from <1369> leaving <169>

R9C7 - removing <3> from <36> leaving <6>

R9C3 can only be <4>

R7C9 can only be <3>

R7C4 can only be <4>

R3C9 can only be <7>

R9C6 can only be <9>

R5C3 can only be <3>

R7C2 can only be <1>

R9C4 can only be <3>

R4C9 can only be <2>

R6C9 can only be <6>

R5C7 can only be <4>

R2C3 can only be <6>

R7C5 can only be <8>

R4C2 can only be <4>

R6C2 can only be <2>

R8C3 can only be <8>

R2C4 can only be <9>

R7C1 can only be <6>

R3C5 can only be <1>

R8C4 can only be <1>

R6C3 can only be <1>

R3C4 can only be <8>

R2C6 can only be <4>

R3C1 can only be <4>

R2C7 can only be <3>

R3C6 can only be <6>

R3C8 can only be <9>

R3C2 can only be <3>

R4C1 can only be <9>

R4C8 can only be <7>

R6C8 can only be <3>

R4C7 can only be <1>

R6C1 can only be <8>

R6C7 can only be <9>



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