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Daily Sudoku Answer 



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Mar 08 - Very Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s074024



Reasoning 



R1C5 can only be <2>

R2C6 can only be <5>

R8C4 can only be <4>

R2C5 can only be <9>

R5C5 can only be <3>

R2C4 can only be <6>

R5C6 can only be <4>

R5C4 can only be <2>

R8C6 can only be <3>

R6C7 is the only square in row 6 that can be <3>

R1C9 is the only square in row 1 that can be <3>

R7C2 is the only square in row 7 that can be <3>

Intersection of row 1 with block 1. The value <5> only appears in one or more of squares R1C1, R1C2 and R1C3 of row 1. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R3C1 - removing <5> from <568> leaving <68>

R3C2 - removing <5> from <2589> leaving <289>

R3C3 - removing <5> from <2569> leaving <269>

Intersection of column 2 with block 4. The value <5> only appears in one or more of squares R4C2, R5C2 and R6C2 of column 2. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain this value.

R5C1 - removing <5> from <5678> leaving <678>

R5C3 - removing <5> from <15679> leaving <1679>

R6C3 - removing <5> from <456> leaving <46>

Intersection of column 9 with block 9. The value <4> only appears in one or more of squares R7C9, R8C9 and R9C9 of column 9. These squares are the ones that intersect with block 9. Thus, the other (non-intersecting) squares of block 9 cannot contain this value.

R7C7 - removing <4> from <1489> leaving <189>

R7C8 - removing <4> from <1478> leaving <178>

R9C7 - removing <4> from <124> leaving <12>

Squares R2C2 and R2C8 in row 2 and R8C2 and R8C8 in row 8 form a Simple X-Wing pattern on possibility <2>. All other instances of this possibility in columns 2 and 8 can be removed.

R3C2 - removing <2> from <289> leaving <89>

R3C8 - removing <2> from <1256> leaving <156>

R4C8 - removing <2> from <248> leaving <48>

R4C7 is the only square in row 4 that can be <2>

R9C7 can only be <1>

R9C5 can only be <7>

R3C7 can only be <6>

R3C1 can only be <8>

R1C7 can only be <4>

R8C5 can only be <1>

R2C8 can only be <2>

R2C2 can only be <4>

R8C8 can only be <7>

R3C9 can only be <5>

R3C2 can only be <9>

R3C3 can only be <2>

R3C8 can only be <1>

R5C9 can only be <9>

R5C7 can only be <8>

R7C9 can only be <4>

R7C1 can only be <7>

R9C9 can only be <2>

R8C2 can only be <2>

R7C8 can only be <8>

R4C2 can only be <8>

R6C2 can only be <5>

R4C8 can only be <4>

R4C3 can only be <9>

R7C7 can only be <9>

R6C8 can only be <6>

R5C2 can only be <1>

R6C3 can only be <4>

R5C8 can only be <5>

R7C3 can only be <1>

R5C1 can only be <6>

R5C3 can only be <7>

R1C1 can only be <5>

R9C3 can only be <5>

R9C1 can only be <4>

R1C3 can only be <6>



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