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Daily Sudoku Answer 



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Aug 13 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s033309



Reasoning 



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

R8C2 can only be <8>

R7C2 can only be <1>

R2C6 is the only square in row 2 that can be <6>

R3C7 is the only square in row 3 that can be <1>

R1C6 is the only square in row 1 that can be <1>

R6C1 is the only square in row 6 that can be <1>

R7C5 is the only square in row 7 that can be <4>

R9C9 is the only square in row 9 that can be <1>

R9C3 is the only square in row 9 that can be <6>

R7C3 is the only square in column 3 that can be <3>

R3C4 is the only square in column 4 that can be <4>

R4C4 is the only square in column 4 that can be <3>

R2C8 is the only square in column 8 that can be <4>

R5C9 is the only square in column 9 that can be <3>

Squares R8C1 and R8C3 in row 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <29>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R8C4 - removing <9> from <579> leaving <57>

R8C8 - removing <2> from <257> leaving <57>

Squares R1C5 and R3C5 in column 5 form a simple naked pair. These 2 squares both contain the 2 possibilities <37>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R4C5 - removing <7> from <6789> leaving <689>

R6C5 - removing <7> from <2789> leaving <289>

R9C5 - removing <7> from <789> leaving <89>

Squares R2C7 and R2C9 in block 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <27>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R1C7 - removing <7> from <357> leaving <35>

R3C8 - removing <27> from <2357> leaving <35>

Intersection of row 7 with block 9. The values <29> only appears in one or more of squares R7C7, R7C8 and R7C9 of row 7. These squares are the ones that intersect with block 9. Thus, the other (non-intersecting) squares of block 9 cannot contain these values.

R9C7 - removing <9> from <379> leaving <37>

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.

R6C4 - removing <7> from <579> leaving <59>

Intersection of column 8 with block 9. The values <78> 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 these values.

R9C7 - removing <7> from <37> leaving <3>

R1C7 can only be <5>

R1C3 can only be <4>

R3C8 can only be <3>

R3C5 can only be <7>

R1C1 can only be <6>

R3C2 can only be <5>

R1C5 can only be <3>

R1C2 can only be <7>

R5C1 can only be <9>

R5C2 can only be <6>

R8C1 can only be <2>

R5C5 can only be <2>

R5C8 can only be <5>

R8C8 can only be <7>

R8C3 can only be <9>

R3C1 can only be <8>

R8C4 can only be <5>

R9C8 can only be <8>

R9C5 can only be <9>

R7C8 can only be <2>

R3C3 can only be <2>

R4C1 can only be <4>

R7C7 can only be <9>

R6C4 can only be <9>

R7C6 can only be <8>

R9C4 can only be <7>

R6C5 can only be <8>

R6C3 can only be <5>

R4C5 can only be <6>

R7C9 can only be <5>

R4C7 can only be <7>

R4C6 can only be <5>

R4C9 can only be <9>

R2C7 can only be <2>

R6C9 can only be <2>

R6C6 can only be <7>

R4C3 can only be <8>

R6C7 can only be <4>

R2C9 can only be <7>



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