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Daily Sudoku Answer 



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Jun 21 - Super Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s029869



Reasoning 



R5C5 can only be <4>

R2C6 is the only square in row 2 that can be <5>

R2C4 is the only square in row 2 that can be <8>

R4C2 is the only square in row 4 that can be <8>

R6C7 is the only square in row 6 that can be <5>

R7C5 is the only square in row 7 that can be <5>

R7C8 is the only square in row 7 that can be <8>

R7C7 is the only square in row 7 that can be <1>

R4C7 can only be <9>

R5C3 is the only square in row 5 that can be <9>

R8C3 is the only square in row 8 that can be <7>

R2C7 is the only square in row 2 that can be <7>

R3C2 is the only square in row 3 that can be <7>

R3C5 is the only square in row 3 that can be <9>

R1C5 can only be <6>

R9C5 can only be <7>

R1C2 is the only square in row 1 that can be <9>

R8C9 is the only square in row 8 that can be <9>

R9C1 is the only square in row 9 that can be <5>

Squares R3C4 and R3C6 in row 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <24>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R3C3 - removing <24> from <1234> leaving <13>

R3C7 - removing <2> from <236> leaving <36>

R3C8 - removing <24> from <12346> leaving <136>

R2C3 is the only square in block 1 that can be <2>

Intersection of row 9 with block 9. The value <6> only appears in one or more of squares R9C7, R9C8 and R9C9 of row 9. These squares are the ones that intersect with block 9. Thus, the other (non-intersecting) squares of block 9 cannot contain this value.

R8C7 - removing <6> from <236> leaving <23>

Intersection of column 9 with block 3. The value <4> only appears in one or more of squares R1C9, R2C9 and R3C9 of column 9. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.

R1C8 - removing <4> from <234> leaving <23>

Intersection of block 1 with column 1. The value <4> only appears in one or more of squares R1C1, R2C1 and R3C1 of block 1. These squares are the ones that intersect with column 1. Thus, the other (non-intersecting) squares of column 1 cannot contain this value.

R8C1 - removing <4> from <346> leaving <36>

Intersection of row 8 with block 8. The value <4> only appears in one or more of squares R8C4, R8C5 and R8C6 of row 8. These squares are the ones that intersect with block 8. Thus, the other (non-intersecting) squares of block 8 cannot contain this value.

R7C4 - removing <4> from <246> leaving <26>

R7C6 - removing <4> from <234> leaving <23>

Squares R3C4, R3C6, R8C4 and R8C6 form a Type-3 Unique Rectangle on <24>. Upon close inspection, it is clear that:

(R8C4 or R8C6)<36> and R8C1<36> form a naked pair on <36> in row 8. No other squares in the row can contain these possibilities

R8C7 - removing <3> from <23> leaving <2>

R5C7 can only be <6>

R9C9 can only be <6>

R9C8 can only be <3>

R5C1 can only be <1>

R3C7 can only be <3>

R6C8 can only be <4>

R6C2 can only be <3>

R4C8 can only be <1>

R9C2 can only be <2>

R1C8 can only be <2>

R1C9 can only be <4>

R1C1 can only be <3>

R2C9 can only be <1>

R2C1 can only be <4>

R5C9 can only be <2>

R3C8 can only be <6>

R3C3 can only be <1>

R4C3 can only be <4>

R6C3 can only be <6>

R7C2 can only be <4>

R8C1 can only be <6>

R7C3 can only be <3>

R7C6 can only be <2>

R7C4 can only be <6>

R3C6 can only be <4>

R8C4 can only be <4>

R8C6 can only be <3>

R3C4 can only be <2>



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