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Daily Sudoku Answer 



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Jul 26 - Hard
Puzzle Copyright © Kevin Stone

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Reasoning 



R1C1 is the only square in column 1 that can be <8>

R7C2 is the only square in column 2 that can be <3>

R6C6 is the only square in block 5 that can be <6>

R6C8 is the only square in block 6 that can be <4>

R6C1 can only be <9>

R2C2 is the only square in row 2 that can be <4>

R2C8 is the only square in row 2 that can be <7>

R4C1 is the only square in row 4 that can be <4>

R4C2 is the only square in row 4 that can be <2>

R8C6 is the only square in row 8 that can be <4>

R9C3 is the only square in row 9 that can be <4>

R5C2 is the only square in column 2 that can be <5>

Intersection of row 8 with block 7. The value <6> only appears in one or more of squares R8C1, R8C2 and R8C3 of row 8. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.

R7C3 - removing <6> from <679> leaving <79>

R9C1 - removing <6> from <267> leaving <27>

Intersection of column 2 with block 1. The value <7> only appears in one or more of squares R1C2, R2C2 and R3C2 of column 2. 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 <1679> leaving <169>

R3C3 - removing <7> from <179> leaving <19>

Intersection of column 8 with block 9. The value <5> 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 this value.

R7C7 - removing <5> from <568> leaving <68>

R9C7 - removing <5> from <156> leaving <16>

R9C9 - removing <5> from <1259> leaving <129>

R1C7 is the only square in column 7 that can be <5>

R2C9 can only be <8>

R2C4 can only be <5>

R4C4 can only be <9>

R1C4 can only be <2>

R1C9 can only be <1>

R7C4 can only be <6>

R4C9 can only be <5>

R3C7 can only be <4>

R3C8 can only be <2>

R8C8 can only be <9>

R4C5 can only be <1>

R6C9 can only be <3>

R6C5 can only be <5>

R5C9 can only be <9>

R7C7 can only be <8>

R9C4 can only be <3>

R5C7 can only be <1>

R8C2 can only be <6>

R7C8 can only be <5>

R9C9 can only be <2>

R3C4 can only be <8>

R9C1 can only be <7>

R5C5 can only be <3>

R5C8 can only be <8>

R9C7 can only be <6>

R9C8 can only be <1>

R8C1 can only be <2>

R9C5 can only be <9>

R5C1 can only be <6>

R7C3 can only be <9>

R9C6 can only be <5>

R3C5 can only be <7>

R7C6 can only be <7>

R3C2 can only be <9>

R1C5 can only be <4>

R7C5 can only be <2>

R1C6 can only be <9>

R5C3 can only be <7>

R1C3 can only be <6>

R3C3 can only be <1>

R1C2 can only be <7>

R3C6 can only be <3>



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