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Daily Sudoku Answer 



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May 22 - Hard
Puzzle Copyright © Kevin Stone

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Reasoning 



R1C7 is the only square in row 1 that can be <2>

R2C7 is the only square in row 2 that can be <9>

R3C4 is the only square in row 3 that can be <6>

R4C6 is the only square in row 4 that can be <9>

R5C5 is the only square in row 5 that can be <2>

R7C3 is the only square in row 7 that can be <2>

R7C6 is the only square in row 7 that can be <6>

R8C9 is the only square in row 8 that can be <2>

R9C4 is the only square in row 9 that can be <2>

R9C9 is the only square in row 9 that can be <6>

R6C4 is the only square in column 4 that can be <8>

R8C6 is the only square in column 6 that can be <7>

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

R1C8 is the only square in column 8 that can be <7>

R4C9 is the only square in column 9 that can be <7>

Intersection of row 3 with block 3. The value <3> only appears in one or more of squares R3C7, R3C8 and R3C9 of row 3. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.

R2C9 - removing <3> from <345> leaving <45>

Intersection of row 5 with block 4. The values <19> only appears in one or more of squares R5C1, R5C2 and R5C3 of row 5. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain these values.

R4C3 - removing <1> from <145> leaving <45>

Intersection of row 5 with block 6. The values <38> only appears in one or more of squares R5C7, R5C8 and R5C9 of row 5. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain these values.

R6C7 - removing <3> from <346> leaving <46>

R5C7 is the only square in column 7 that can be <3>

R5C9 can only be <5>

R5C3 can only be <1>

R5C8 can only be <8>

R2C9 can only be <4>

R3C9 can only be <3>

R3C8 can only be <5>

R5C2 can only be <9>

R7C8 can only be <3>

R7C1 can only be <7>

R9C8 can only be <9>

R8C8 can only be <4>

R3C2 can only be <4>

R5C1 can only be <6>

R7C2 can only be <8>

R8C3 can only be <5>

R8C5 can only be <1>

R4C3 can only be <4>

R9C3 can only be <3>

R9C2 can only be <1>

R8C1 can only be <9>

R9C6 can only be <5>

R8C7 can only be <8>

R6C6 can only be <3>

R1C2 can only be <5>

R4C7 can only be <6>

R6C3 can only be <7>

R4C5 can only be <5>

R6C7 can only be <4>

R6C1 can only be <5>

R2C3 can only be <8>

R6C5 can only be <6>

R1C6 can only be <1>

R2C2 can only be <7>

R1C1 can only be <3>

R1C4 can only be <4>

R2C4 can only be <5>

R2C5 can only be <3>

R4C4 can only be <1>

R2C1 can only be <1>



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