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Daily Sudoku Answer 



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Feb 14 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s311902



Reasoning 



R2C1 can only be <3>

R2C5 can only be <7>

R2C9 can only be <6>

R7C2 is the only square in row 7 that can be <3>

R8C1 is the only square in row 8 that can be <2>

R9C7 is the only square in row 9 that can be <3>

R3C7 is the only square in column 7 that can be <1>

R8C7 is the only square in column 7 that can be <6>

R9C2 is the only square in column 2 that can be <6>

R4C2 is the only square in column 2 that can be <7>

R9C3 is the only square in column 3 that can be <7>

R9C4 is the only square in block 8 that can be <5>

R9C6 is the only square in row 9 that can be <2>

R7C6 is the only square in column 6 that can be <4>

Squares R7C4 and R7C5 in row 7 form a simple naked pair. These 2 squares both contain the 2 possibilities <68>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R7C1 - removing <8> from <189> leaving <19>

R7C8 - removing <8> from <178> leaving <17>

R7C9 - removing <8> from <789> leaving <79>

Intersection of row 4 with block 6. The value <5> only appears in one or more of squares R4C7, R4C8 and R4C9 of row 4. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain this value.

R5C7 - removing <5> from <579> leaving <79>

R5C9 - removing <5> from <45789> leaving <4789>

R6C7 - removing <5> from <579> leaving <79>

R6C9 - removing <5> from <24579> leaving <2479>

R4C7 is the only square in column 7 that can be <5>

Squares R5C7 and R6C7 in block 6 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 block.

R5C9 - removing <79> from <4789> leaving <48>

R6C9 - removing <79> from <2479> leaving <24>

Squares R5C9 and R9C9 in column 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <48>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R6C9 - removing <4> from <24> leaving <2>

R8C9 - removing <48> from <4589> leaving <59>

R4C8 can only be <8>

R5C9 can only be <4>

R9C9 can only be <8>

R4C4 is the only square in row 4 that can be <2>

R8C3 is the only square in row 8 that can be <8>

R3C3 can only be <4>

R3C2 can only be <5>

R3C8 can only be <2>

R1C2 can only be <9>

R3C5 can only be <8>

R1C1 can only be <8>

R8C2 can only be <4>

R7C5 can only be <6>

R1C4 can only be <3>

R7C4 can only be <8>

R8C8 can only be <5>

R9C1 can only be <1>

R8C9 can only be <9>

R1C8 can only be <7>

R7C9 can only be <7>

R9C8 can only be <4>

R7C1 can only be <9>

R1C6 can only be <1>

R1C5 can only be <2>

R6C6 can only be <9>

R1C9 can only be <5>

R7C8 can only be <1>

R6C3 can only be <1>

R6C7 can only be <7>

R4C6 can only be <3>

R6C4 can only be <6>

R5C7 can only be <9>

R5C1 can only be <5>

R5C4 can only be <7>

R4C3 can only be <9>

R5C6 can only be <8>

R5C5 can only be <1>

R6C1 can only be <4>

R6C5 can only be <5>

R5C3 can only be <3>



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