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Daily Sudoku Answer 



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Jun 02 - Hard
Puzzle Copyright © Kevin Stone

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Reasoning 



R1C3 is the only square in row 1 that can be <7>

R1C9 is the only square in row 1 that can be <9>

R3C6 is the only square in row 3 that can be <7>

R4C1 is the only square in row 4 that can be <3>

R6C4 is the only square in row 6 that can be <3>

R6C3 is the only square in column 3 that can be <4>

R3C3 is the only square in column 3 that can be <5>

R8C9 is the only square in column 9 that can be <8>

R8C8 is the only square in row 8 that can be <7>

R5C2 is the only square in block 4 that can be <6>

R8C4 is the only square in row 8 that can be <6>

Squares R8C5 and R8C6 in row 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <12>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R8C1 - removing <1> from <145> leaving <45>

R8C2 - removing <12> from <1245> leaving <45>

R9C2 is the only square in column 2 that can be <2>

Squares R7C3 and R9C3 in block 7 form a simple naked pair. These 2 squares both contain the 2 possibilities <16>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C1 - removing <1> from <189> leaving <89>

R9C1 - removing <1> from <189> leaving <89>

Squares R7C1 and R9C1 in column 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <89>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C1 - removing <8> from <148> leaving <14>

Squares R8C5 and R8C6 in block 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <12>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C4 - removing <2> from <289> leaving <89>

R9C6 - removing <1> from <189> leaving <89>

R2C4 is the only square in column 4 that can be <2>

Intersection of column 9 with block 3. The value <1> only appears in one or more of squares R1C9, R2C9 and R3C9 of column 9. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.

R1C8 - removing <1> from <145> leaving <45>

R2C8 - removing <1> from <13456> leaving <3456>

R1C2 is the only square in row 1 that can be <1>

R3C2 can only be <3>

R6C2 can only be <5>

R2C1 can only be <4>

R8C1 can only be <5>

R3C7 can only be <2>

R2C2 can only be <8>

R3C9 can only be <1>

R7C7 can only be <6>

R2C9 can only be <6>

R6C1 can only be <1>

R8C2 can only be <4>

R7C3 can only be <1>

R9C7 can only be <3>

R9C8 can only be <1>

R9C3 can only be <6>

R7C8 can only be <2>

R2C5 can only be <1>

R2C6 can only be <5>

R8C5 can only be <2>

R4C6 can only be <2>

R1C4 can only be <8>

R2C8 can only be <3>

R4C9 can only be <7>

R8C6 can only be <1>

R6C5 can only be <7>

R4C5 can only be <4>

R6C9 can only be <2>

R7C4 can only be <9>

R4C7 can only be <5>

R5C5 can only be <8>

R4C8 can only be <6>

R1C7 can only be <4>

R5C8 can only be <4>

R5C6 can only be <9>

R5C4 can only be <5>

R9C6 can only be <8>

R1C8 can only be <5>

R7C1 can only be <8>

R9C1 can only be <9>



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