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Daily Sudoku Answer 



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Jul 12 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s028425



Reasoning 



R8C6 can only be <1>

R8C8 can only be <5>

R1C3 is the only square in row 1 that can be <7>

R3C7 is the only square in row 3 that can be <6>

R4C7 is the only square in row 4 that can be <3>

R4C3 is the only square in row 4 that can be <9>

R5C4 is the only square in row 5 that can be <7>

R5C3 is the only square in row 5 that can be <6>

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

R6C7 is the only square in row 6 that can be <9>

R6C5 is the only square in row 6 that can be <5>

R5C6 can only be <4>

R7C6 can only be <9>

R2C4 is the only square in row 2 that can be <9>

R7C3 is the only square in row 7 that can be <5>

R7C4 is the only square in row 7 that can be <6>

R8C2 is the only square in row 8 that can be <6>

R8C7 is the only square in row 8 that can be <7>

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

Intersection of column 1 with block 1. The value <3> only appears in one or more of squares R1C1, R2C1 and R3C1 of column 1. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R3C3 - removing <3> from <12348> leaving <1248>

Intersection of block 6 with column 8. The value <4> only appears in one or more of squares R4C8, R5C8 and R6C8 of block 6. These squares are the ones that intersect with column 8. Thus, the other (non-intersecting) squares of column 8 cannot contain this value.

R2C8 - removing <4> from <124> leaving <12>

Squares R1C7<128>, R1C9<128> and R2C8<12> in block 3 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <128>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R2C7 - removing <128> from <12458> leaving <45>

R3C9 - removing <128> from <12458> leaving <45>

Intersection of row 2 with block 1. The value <8> only appears in one or more of squares R2C1, R2C2 and R2C3 of row 2. 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 <8> from <1238> leaving <123>

R3C1 - removing <8> from <1238> leaving <123>

R3C3 - removing <8> from <1248> leaving <124>

R7C1 is the only square in column 1 that can be <8>

R7C5 can only be <4>

R8C3 can only be <3>

R8C4 can only be <8>

R9C3 can only be <2>

R3C4 can only be <3>

R9C5 can only be <3>

R1C1 is the only square in row 1 that can be <3>

R3C5 is the only square in row 3 that can be <8>

R1C5 can only be <1>

R2C8 is the only square in block 3 that can be <1>

R6C8 can only be <4>

R6C2 can only be <8>

R4C8 can only be <2>

R4C2 can only be <4>

R6C3 can only be <1>

R3C3 can only be <4>

R5C1 can only be <2>

R3C9 can only be <5>

R2C3 can only be <8>

R2C2 can only be <2>

R3C6 can only be <2>

R5C9 can only be <1>

R2C7 can only be <4>

R3C1 can only be <1>

R5C7 can only be <5>

R7C9 can only be <2>

R7C7 can only be <1>

R1C9 can only be <8>

R1C7 can only be <2>

R9C9 can only be <4>

R2C6 can only be <5>

R9C7 can only be <8>



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