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Daily Sudoku Answer 



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Jun 13 - Hard
Puzzle Copyright © Kevin Stone

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Reasoning 



R4C5 can only be <9>

R4C4 can only be <4>

R4C1 can only be <3>

R1C8 is the only square in row 1 that can be <5>

R2C2 is the only square in row 2 that can be <3>

R1C6 is the only square in row 1 that can be <3>

R3C9 is the only square in row 3 that can be <4>

R6C9 is the only square in row 6 that can be <9>

R7C1 is the only square in row 7 that can be <4>

R5C1 can only be <9>

R5C2 can only be <1>

R5C3 can only be <4>

R9C6 is the only square in row 9 that can be <4>

R8C1 is the only square in column 1 that can be <5>

R8C9 can only be <1>

R7C7 can only be <9>

R3C1 is the only square in column 1 that can be <7>

R9C3 is the only square in column 3 that can be <3>

R5C6 is the only square in column 6 that can be <5>

Squares R2C1 and R2C9 in row 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <68>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R2C4 - removing <8> from <1289> leaving <129>

R2C7 - removing <68> from <1268> leaving <12>

R2C8 - removing <6> from <269> leaving <29>

Squares R1C1 and R2C1 in block 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <68>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R3C2 - removing <8> from <289> leaving <29>

Squares R6C5 and R6C6 in block 5 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.

R5C4 - removing <8> from <278> leaving <27>

R5C5 - removing <8> from <278> leaving <27>

Intersection of row 3 with block 2. The value <8> only appears in one or more of squares R3C4, R3C5 and R3C6 of row 3. These squares are the ones that intersect with block 2. Thus, the other (non-intersecting) squares of block 2 cannot contain this value.

R1C4 - removing <8> from <1289> leaving <129>

R1C5 - removing <8> from <1268> leaving <126>

R7C4 is the only square in column 4 that can be <8>

R7C2 can only be <7>

R8C6 can only be <9>

R8C3 can only be <2>

R9C4 can only be <7>

R9C5 can only be <5>

R5C4 can only be <2>

R9C9 can only be <6>

R7C5 can only be <1>

R9C7 can only be <2>

R2C9 can only be <8>

R2C1 can only be <6>

R5C9 can only be <3>

R5C5 can only be <7>

R5C8 can only be <6>

R7C9 can only be <5>

R7C8 can only be <3>

R6C5 can only be <8>

R8C2 can only be <8>

R8C8 can only be <7>

R9C2 can only be <9>

R3C2 can only be <2>

R2C7 can only be <1>

R1C1 can only be <8>

R2C4 can only be <9>

R1C7 can only be <6>

R5C7 can only be <8>

R3C8 can only be <9>

R6C6 can only be <1>

R3C5 can only be <6>

R3C6 can only be <8>

R1C5 can only be <2>

R2C8 can only be <2>

R1C4 can only be <1>

R3C3 can only be <1>

R1C3 can only be <9>



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