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Daily Sudoku Answer 



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Jun 06 - Very Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s083562



Reasoning 



R1C8 can only be <2>

R3C8 is the only square in row 3 that can be <7>

R3C1 is the only square in row 3 that can be <8>

R1C9 is the only square in row 1 that can be <8>

R5C5 is the only square in row 5 that can be <8>

R6C5 is the only square in row 6 that can be <7>

R6C3 is the only square in row 6 that can be <9>

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

R9C7 is the only square in row 9 that can be <9>

R4C8 is the only square in row 4 that can be <9>

R7C5 is the only square in row 7 that can be <9>

R4C5 is the only square in column 5 that can be <1>

R2C6 is the only square in block 2 that can be <6>

R2C5 is the only square in row 2 that can be <2>

R8C5 can only be <5>

R8C4 can only be <2>

R3C5 can only be <3>

R3C4 can only be <5>

R6C4 can only be <6>

R7C6 can only be <3>

R4C4 can only be <3>

R6C2 is the only square in block 4 that can be <5>

R4C9 is the only square in column 9 that can be <5>

Squares R2C8 and R3C7 in block 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <14>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R2C7 - removing <14> from <1345> leaving <35>

Intersection of column 1 with block 4. The value <1> only appears in one or more of squares R4C1, R5C1 and R6C1 of column 1. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain this value.

R5C2 - removing <1> from <146> leaving <46>

Intersection of column 3 with block 7. The values <27> only appears in one or more of squares R7C3, R8C3 and R9C3 of column 3. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain these values.

R9C1 - removing <2> from <234> leaving <34>

Squares R9C1 and R9C2 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.

R9C3 - removing <4> from <247> leaving <27>

R9C9 - removing <4> from <247> leaving <27>

Squares R9C1 and R9C2 in block 7 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 block.

R8C3 - removing <4> from <146> leaving <16>

Squares R7C2 and R8C3 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.

R7C3 - removing <16> from <1267> leaving <27>

Intersection of column 3 with block 1. The values <45> only appears in one or more of squares R1C3, R2C3 and R3C3 of column 3. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain these values.

R2C2 - removing <4> from <134> leaving <13>

Intersection of column 9 with block 6. The value <4> only appears in one or more of squares R4C9, R5C9 and R6C9 of column 9. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain this value.

R4C7 - removing <4> from <246> leaving <26>

R5C8 - removing <4> from <146> leaving <16>

Squares R9C3, R9C9, R7C3 and R7C9 form a Type-1 Unique Rectangle on <27>.

R7C9 - removing <27> from <127> leaving <1>

R7C2 can only be <6>

R7C7 can only be <2>

R5C2 can only be <4>

R8C3 can only be <1>

R7C3 can only be <7>

R4C7 can only be <6>

R9C9 can only be <7>

R3C3 can only be <4>

R9C3 can only be <2>

R3C7 can only be <1>

R2C3 can only be <5>

R2C8 can only be <4>

R8C7 can only be <4>

R5C8 can only be <1>

R5C9 can only be <2>

R9C2 can only be <3>

R4C1 can only be <2>

R5C1 can only be <6>

R6C9 can only be <4>

R6C6 can only be <2>

R8C8 can only be <6>

R9C1 can only be <4>

R2C2 can only be <1>

R2C7 can only be <3>

R1C3 can only be <6>

R1C7 can only be <5>

R4C6 can only be <4>

R6C1 can only be <1>

R1C1 can only be <3>



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