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Daily Sudoku Answer 



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Aug 03 - Super Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s036089



Reasoning 



R2C6 can only be <6>

R2C2 is the only square in row 2 that can be <9>

R8C8 is the only square in row 8 that can be <5>

R3C6 is the only square in column 6 that can be <4>

R3C7 can only be <8>

R2C8 can only be <3>

R1C5 is the only square in row 1 that can be <3>

R5C7 is the only square in row 5 that can be <3>

R9C8 is the only square in column 8 that can be <8>

R1C9 is the only square in column 9 that can be <5>

R3C3 is the only square in block 1 that can be <5>

R3C4 can only be <2>

Squares R7C6 and R7C7 in row 7 form a simple naked pair. These 2 squares both contain the 2 possibilities <79>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R7C3 - removing <7> from <178> leaving <18>

Squares R5C1<28>, R5C3<278> and R6C2<27> in block 4 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <278>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R5C2 - removing <278> from <24578> leaving <45>

Squares R5C3 and R9C3 in column 3 and R5C9 and R9C9 in column 9 form a Simple X-Wing pattern on possibility <7>. All other instances of this possibility in rows 5 and 9 can be removed.

R9C2 - removing <7> from <267> leaving <26>

R9C7 - removing <7> from <479> leaving <49>

R5C8 - removing <7> from <1479> leaving <149>

Squares R9C1 and R9C2 in row 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <26>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R9C3 - removing <2> from <127> leaving <17>

R9C5 - removing <26> from <1269> leaving <19>

Squares R9C1 and R9C2 in block 7 form a simple naked pair. These 2 squares both contain the 2 possibilities <26>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R8C2 - removing <26> from <2678> leaving <78>

Squares R9C1, R9C2, R1C1 and R1C2 form a Type-2 Unique Rectangle on <26>.

R1C3 - removing <8> from <28> leaving <2>

Squares R6C5 (XY), R9C5 (XZ) and R5C6 (YZ) form an XY-Wing pattern on <9>. All squares that are buddies of both the XZ and YZ squares cannot be <9>.

R5C5 - removing <9> from <12569> leaving <1256>

R7C6 - removing <9> from <79> leaving <7>

R4C5 - removing <9> from <59> leaving <5>

R4C2 can only be <4>

R2C5 can only be <8>

R7C7 can only be <9>

R8C6 can only be <2>

R9C7 can only be <4>

R5C6 can only be <9>

R9C9 can only be <7>

R1C7 can only be <7>

R9C3 can only be <1>

R5C9 can only be <4>

R1C8 can only be <4>

R4C8 can only be <9>

R2C4 can only be <5>

R8C5 can only be <6>

R5C2 can only be <5>

R5C8 can only be <1>

R5C4 can only be <6>

R6C8 can only be <7>

R6C2 can only be <2>

R8C4 can only be <8>

R5C5 can only be <2>

R9C5 can only be <9>

R7C3 can only be <8>

R5C1 can only be <8>

R6C5 can only be <1>

R9C2 can only be <6>

R7C4 can only be <1>

R5C3 can only be <7>

R8C2 can only be <7>

R9C1 can only be <2>

R1C2 can only be <8>

R1C1 can only be <6>



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