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Daily Sudoku Answer 



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Jun 14 - Very Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s339964



Reasoning 



R8C2 can only be <9>

R8C8 can only be <7>

R8C7 can only be <6>

R8C3 can only be <4>

R3C1 is the only square in row 3 that can be <4>

R4C6 is the only square in row 4 that can be <1>

R4C5 is the only square in row 4 that can be <6>

R7C5 can only be <4>

R9C4 can only be <8>

R9C6 can only be <6>

R4C9 is the only square in row 4 that can be <7>

R3C7 is the only square in row 3 that can be <7>

R5C4 is the only square in row 5 that can be <4>

R5C5 is the only square in row 5 that can be <7>

R9C9 is the only square in row 9 that can be <4>

R9C1 is the only square in row 9 that can be <7>

Squares R2C2 and R2C8 in row 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <58>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R2C3 - removing <5> from <259> leaving <29>

R2C7 - removing <58> from <2589> leaving <29>

Intersection of column 3 with block 1. The value <9> 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 this value.

R1C1 - removing <9> from <2569> leaving <256>

Intersection of block 2 with row 1. The value <9> only appears in one or more of squares R1C4, R1C5 and R1C6 of block 2. These squares are the ones that intersect with row 1. Thus, the other (non-intersecting) squares of row 1 cannot contain this value.

R1C3 - removing <9> from <12569> leaving <1256>

R1C7 - removing <9> from <2359> leaving <235>

R1C9 - removing <9> from <159> leaving <15>

Squares R5C3 and R5C7 in row 5 and R9C3 and R9C7 in row 9 form a Simple X-Wing pattern on possibility <5>. All other instances of this possibility in columns 3 and 7 can be removed.

R1C3 - removing <5> from <1256> leaving <126>

R1C7 - removing <5> from <235> leaving <23>

R7C3 - removing <5> from <1356> leaving <136>

R7C7 - removing <5> from <3589> leaving <389>

Squares R1C4<39>, R1C6<29> and R1C7<23> in row 1 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <239>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R1C1 - removing <2> from <256> leaving <56>

R1C3 - removing <2> from <126> leaving <16>

R6C1 is the only square in column 1 that can be <2>

R6C5 can only be <3>

R5C3 can only be <5>

R3C5 can only be <2>

R1C6 can only be <9>

R5C7 can only be <8>

R9C3 can only be <3>

R4C1 can only be <9>

R5C6 can only be <2>

R6C9 can only be <5>

R6C4 can only be <9>

R1C9 can only be <1>

R9C7 can only be <5>

R1C4 can only be <3>

R6C6 can only be <8>

R1C3 can only be <6>

R4C4 can only be <5>

R1C1 can only be <5>

R7C3 can only be <1>

R1C7 can only be <2>

R2C7 can only be <9>

R2C3 can only be <2>

R7C7 can only be <3>

R3C9 can only be <8>

R3C2 can only be <1>

R3C8 can only be <3>

R7C9 can only be <9>

R2C8 can only be <5>

R7C2 can only be <5>

R3C3 can only be <9>

R7C8 can only be <8>

R7C1 can only be <6>

R2C2 can only be <8>



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