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Daily Sudoku Answer 



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Mar 18 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s011560



Reasoning 



R6C2 can only be <1>

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

R2C1 is the only square in row 2 that can be <5>

R3C9 is the only square in row 3 that can be <4>

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

R2C9 is the only square in column 9 that can be <3>

Intersection of row 3 with block 1. The value <7> only appears in one or more of squares R3C1, R3C2 and R3C3 of row 3. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R1C3 - removing <7> from <679> leaving <69>

Squares R1C3 and R5C3 in column 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R3C3 - removing <69> from <679> leaving <7>

R6C3 - removing <6> from <36> leaving <3>

R8C3 - removing <9> from <2579> leaving <257>

R9C1 is the only square in row 9 that can be <3>

Intersection of row 4 with block 5. The values <39> 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 these values.

R5C4 - removing <9> from <12469> leaving <1246>

R5C5 - removing <9> from <146789> leaving <14678>

Intersection of row 6 with block 5. The values <25> only appears in one or more of squares R6C4, R6C5 and R6C6 of row 6. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain these values.

R4C5 - removing <5> from <14569> leaving <1469>

R4C6 - removing <5> from <135> leaving <13>

R5C4 - removing <2> from <1246> leaving <146>

R5C6 - removing <2> from <1278> leaving <178>

Intersection of block 1 with row 3. The value <8> only appears in one or more of squares R3C1, R3C2 and R3C3 of block 1. These squares are the ones that intersect with row 3. Thus, the other (non-intersecting) squares of row 3 cannot contain this value.

R3C6 - removing <8> from <38> leaving <3>

R4C6 can only be <1>

R2C6 can only be <8>

R2C7 can only be <6>

R5C6 can only be <7>

R2C8 can only be <9>

R2C5 can only be <1>

R1C9 can only be <7>

R1C7 can only be <8>

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

R4C5 is the only square in row 4 that can be <9>

R1C5 can only be <6>

R1C3 can only be <9>

R3C4 can only be <9>

R3C2 can only be <8>

R5C3 can only be <6>

R3C1 can only be <6>

R8C2 can only be <9>

R5C4 can only be <4>

R6C1 can only be <4>

R5C1 can only be <9>

R5C5 can only be <8>

R5C7 can only be <2>

R7C4 can only be <2>

R6C5 can only be <5>

R5C9 can only be <1>

R6C6 can only be <2>

R9C5 can only be <7>

R6C4 can only be <6>

R7C6 can only be <5>

R8C4 can only be <1>

R7C9 can only be <9>

R9C7 can only be <5>

R8C5 can only be <4>

R9C3 can only be <2>

R4C7 can only be <4>

R8C9 can only be <2>

R4C8 can only be <6>

R7C7 can only be <7>

R4C9 can only be <5>

R7C1 can only be <8>

R8C8 can only be <8>

R8C1 can only be <7>

R7C8 can only be <4>

R8C3 can only be <5>

R9C9 can only be <6>



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