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Daily Sudoku Answer 



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May 23 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s015506



Reasoning 



R4C1 can only be <9>

R6C9 can only be <6>

R4C9 can only be <4>

R6C1 can only be <8>

R5C3 can only be <5>

R1C5 is the only square in row 1 that can be <2>

R5C8 is the only square in row 5 that can be <2>

R8C6 is the only square in row 8 that can be <2>

R7C1 is the only square in row 7 that can be <2>

R7C7 is the only square in row 7 that can be <6>

R3C6 is the only square in row 3 that can be <6>

R2C6 can only be <5>

R7C6 can only be <1>

R5C6 can only be <4>

R5C4 can only be <8>

R5C5 can only be <1>

R2C8 is the only square in row 2 that can be <6>

R7C5 is the only square in row 7 that can be <5>

R8C2 is the only square in row 8 that can be <6>

R5C2 can only be <7>

R5C1 can only be <6>

R3C7 is the only square in column 7 that can be <5>

Squares R9C5 and R9C8 in row 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <34>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R9C9 - removing <3> from <139> leaving <19>

Squares R8C7 and R9C9 in block 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <19>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C9 - removing <9> from <389> leaving <38>

Intersection of row 1 with block 3. The value <3> 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.

R2C7 - removing <3> from <13> leaving <1>

R3C9 - removing <3> from <1378> leaving <178>

R8C7 can only be <9>

R5C7 can only be <3>

R9C9 can only be <1>

R9C1 can only be <5>

R5C9 can only be <9>

R9C2 can only be <9>

R1C1 can only be <7>

R2C2 can only be <8>

R7C3 can only be <8>

R3C1 can only be <1>

R1C2 can only be <5>

R3C3 can only be <3>

R2C3 can only be <9>

R7C9 can only be <3>

R8C3 can only be <1>

R7C4 can only be <9>

R1C9 can only be <8>

R9C8 can only be <4>

R9C5 can only be <3>

R8C8 can only be <8>

R1C8 can only be <3>

R3C9 can only be <7>

R3C4 can only be <4>

R2C5 can only be <7>

R2C4 can only be <3>

R8C5 can only be <4>

R3C5 can only be <8>

R8C4 can only be <7>



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