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Daily Sudoku Answer 



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May 22 - Very Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s301299



Reasoning 



R4C6 can only be <4>

R6C6 can only be <2>

R6C7 can only be <5>

R4C3 can only be <8>

R7C6 can only be <7>

R6C4 can only be <8>

R4C7 can only be <9>

R3C6 can only be <6>

R4C4 can only be <5>

R6C3 can only be <3>

R5C7 can only be <7>

R5C8 can only be <8>

R5C5 can only be <9>

R7C4 can only be <4>

R3C4 can only be <7>

Squares R1C3 and R5C3 in column 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <46>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C3 - removing <46> from <45679> leaving <579>

R8C3 - removing <6> from <567> leaving <57>

Intersection of row 1 with block 3. The value <2> 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 <2> from <124> leaving <14>

R2C8 - removing <2> from <12569> leaving <1569>

R3C8 - removing <2> from <259> leaving <59>

Squares R7C1<39>, R9C2<37> and R9C3<79> in block 7 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <379>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C2 - removing <3> from <1358> leaving <158>

R8C1 - removing <3> from <36> leaving <6>

R8C2 - removing <37> from <135678> leaving <1568>

R8C3 - removing <7> from <57> leaving <5>

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

Squares R1C2 and R1C7 in row 1 and R9C2 and R9C7 in row 9 form a Simple X-Wing pattern on possibility <3>. All other instances of this possibility in columns 2 and 7 can be removed.

R3C2 - removing <3> from <345> leaving <45>

R8C7 - removing <3> from <134> leaving <14>

Squares R2C7 and R8C7 in column 7 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 column.

R1C7 - removing <4> from <234> leaving <23>

Intersection of row 1 with block 1. The value <4> 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.

R2C2 - removing <4> from <4567> leaving <567>

R3C2 - removing <4> from <45> leaving <5>

R3C8 can only be <9>

R9C8 can only be <2>

R9C7 can only be <3>

R1C8 can only be <6>

R1C3 can only be <4>

R9C2 can only be <7>

R1C7 can only be <2>

R8C9 can only be <4>

R1C2 can only be <3>

R5C3 can only be <6>

R5C2 can only be <4>

R8C7 can only be <1>

R2C9 can only be <5>

R3C9 can only be <3>

R9C3 can only be <9>

R2C2 can only be <6>

R2C3 can only be <7>

R7C1 can only be <3>

R3C1 can only be <2>

R2C8 can only be <1>

R7C9 can only be <9>

R3C5 can only be <4>

R2C1 can only be <9>

R2C5 can only be <2>

R7C5 can only be <8>

R7C2 can only be <1>

R8C5 can only be <3>

R8C2 can only be <8>

R2C7 can only be <4>

R7C8 can only be <5>



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