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Daily Sudoku Answer 



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Apr 06 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s026327



Reasoning 



R8C7 can only be <5>

R8C8 can only be <9>

R9C7 can only be <7>

R8C2 can only be <3>

R7C7 can only be <2>

R7C9 can only be <1>

R6C9 can only be <2>

R8C6 can only be <4>

R7C2 can only be <9>

R8C5 can only be <6>

R1C9 can only be <9>

R4C9 can only be <4>

R9C2 can only be <1>

R9C3 can only be <5>

R9C1 can only be <4>

R1C5 is the only square in row 1 that can be <4>

R1C4 is the only square in row 1 that can be <7>

R3C1 is the only square in row 3 that can be <7>

R4C8 is the only square in row 4 that can be <1>

R6C3 is the only square in row 6 that can be <1>

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

R2C2 is the only square in column 2 that can be <8>

R2C5 is the only square in column 5 that can be <3>

Intersection of row 1 with block 3. The value <8> only appears in one or more of squares R1C7, R1C8 and R1C9 of row 1. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.

R3C8 - removing <8> from <2568> leaving <256>

Intersection of block 2 with row 3. The values <28> only appears in one or more of squares R3C4, R3C5 and R3C6 of block 2. These squares are the ones that intersect with row 3. Thus, the other (non-intersecting) squares of row 3 cannot contain these values.

R3C3 - removing <2> from <269> leaving <69>

R3C8 - removing <2> from <256> leaving <56>

Squares R6C1<59>, R6C5<589> and R6C6<589> in row 6 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <589>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R6C8 - removing <8> from <678> leaving <67>

R1C8 is the only square in column 8 that can be <8>

R1C7 can only be <6>

R1C3 can only be <2>

R4C7 can only be <8>

R3C8 can only be <5>

R2C8 can only be <2>

R2C3 can only be <9>

R2C4 can only be <5>

R3C3 can only be <6>

R7C4 can only be <3>

R7C6 can only be <5>

R5C4 can only be <6>

R5C8 can only be <7>

R4C4 can only be <9>

R5C2 can only be <2>

R6C8 can only be <6>

R6C2 can only be <7>

R4C1 can only be <5>

R3C4 can only be <8>

R6C6 can only be <8>

R5C6 can only be <3>

R4C2 can only be <6>

R6C5 can only be <5>

R9C6 can only be <9>

R9C5 can only be <8>

R3C6 can only be <2>

R3C5 can only be <9>

R4C5 can only be <2>

R6C1 can only be <9>



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