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Daily Sudoku Answer 



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Aug 31 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s302014



Reasoning 



R1C9 can only be <5>

R7C4 can only be <3>

R3C4 can only be <7>

R6C4 is the only square in row 6 that can be <9>

Squares R5C1 and R5C4 in row 5 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.

R5C2 - removing <58> from <1458> leaving <14>

R5C5 - removing <8> from <134678> leaving <13467>

R5C8 - removing <8> from <3678> leaving <367>

Squares R4C4 and R5C4 in block 5 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 block.

R4C5 - removing <8> from <1368> leaving <136>

R6C5 - removing <8> from <2478> leaving <247>

Intersection of row 4 with block 5. The value <6> only appears in one or more of squares R4C4, R4C5 and R4C6 of row 4. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain this value.

R5C5 - removing <6> from <13467> leaving <1347>

R5C6 - removing <6> from <1367> leaving <137>

Intersection of column 6 with block 5. The value <7> only appears in one or more of squares R4C6, R5C6 and R6C6 of column 6. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain this value.

R5C5 - removing <7> from <1347> leaving <134>

R6C5 - removing <7> from <247> leaving <24>

Intersection of column 8 with block 9. The value <8> only appears in one or more of squares R7C8, R8C8 and R9C8 of column 8. 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 <8> from <48> leaving <4>

R8C7 - removing <8> from <1389> leaving <139>

R2C9 is the only square in row 2 that can be <4>

R9C2 is the only square in row 9 that can be <4>

R5C2 can only be <1>

R5C5 is the only square in row 5 that can be <4>

R6C5 can only be <2>

R6C6 can only be <7>

R6C7 can only be <8>

R5C6 can only be <3>

R6C3 can only be <4>

R4C7 can only be <3>

R5C9 can only be <6>

R3C6 can only be <1>

R5C8 can only be <7>

R9C9 can only be <3>

R8C9 can only be <2>

R3C3 can only be <6>

R3C7 can only be <9>

R4C6 can only be <6>

R1C5 can only be <8>

R8C7 can only be <1>

R4C5 can only be <1>

R7C6 can only be <2>

R1C8 can only be <1>

R2C7 can only be <7>

R1C2 can only be <9>

R2C5 can only be <3>

R2C8 can only be <2>

R3C8 can only be <3>

R3C2 can only be <2>

R1C1 can only be <7>

R9C1 can only be <9>

R9C8 can only be <6>

R9C5 can only be <7>

R7C8 can only be <8>

R7C3 can only be <5>

R8C8 can only be <9>

R8C5 can only be <6>

R7C2 can only be <6>

R4C3 can only be <8>

R8C2 can only be <8>

R4C4 can only be <5>

R2C3 can only be <1>

R8C3 can only be <7>

R5C1 can only be <5>

R5C4 can only be <8>

R2C1 can only be <8>

R8C1 can only be <3>

R2C2 can only be <5>



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