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Daily Sudoku Answer 



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Apr 22 - Hard
Puzzle Copyright © Kevin Stone

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Reasoning 



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

R6C5 is the only square in row 6 that can be <8>

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

R2C7 can only be <7>

R9C7 can only be <6>

R2C8 is the only square in row 2 that can be <5>

R2C9 is the only square in row 2 that can be <1>

R6C2 is the only square in row 6 that can be <1>

R5C8 is the only square in row 5 that can be <1>

R8C6 is the only square in row 8 that can be <2>

R5C6 can only be <5>

R8C3 is the only square in row 8 that can be <5>

R7C6 is the only square in column 6 that can be <3>

R1C3 is the only square in column 3 that can be <3>

R1C7 can only be <9>

R1C5 can only be <4>

R3C7 can only be <3>

R3C9 is the only square in column 9 that can be <4>

Squares R8C8 and R8C9 in row 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <89>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R8C1 - removing <89> from <3689> leaving <36>

R8C2 - removing <89> from <3689> leaving <36>

Squares R2C1 and R2C2 in block 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <48>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R1C2 - removing <8> from <678> leaving <67>

R3C2 - removing <8> from <678> leaving <67>

Squares R1C2 and R3C2 in column 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <67>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R5C2 - removing <7> from <379> leaving <39>

R7C2 - removing <67> from <46789> leaving <489>

R8C2 - removing <6> from <36> leaving <3>

R8C1 can only be <6>

R5C2 can only be <9>

R5C4 can only be <6>

R6C1 can only be <2>

R5C5 can only be <2>

R7C4 can only be <8>

R5C9 can only be <7>

R4C5 can only be <9>

R5C1 can only be <3>

R6C9 can only be <9>

R8C9 can only be <8>

R4C8 can only be <6>

R7C2 can only be <4>

R9C4 can only be <5>

R8C8 can only be <9>

R1C9 can only be <6>

R9C5 can only be <1>

R3C4 can only be <9>

R7C5 can only be <6>

R1C2 can only be <7>

R4C9 can only be <2>

R3C8 can only be <8>

R3C5 can only be <5>

R3C6 can only be <7>

R2C2 can only be <8>

R9C3 can only be <7>

R7C8 can only be <7>

R9C1 can only be <8>

R9C8 can only be <4>

R4C3 can only be <4>

R7C3 can only be <1>

R7C1 can only be <9>

R1C6 can only be <8>

R3C2 can only be <6>

R2C1 can only be <4>

R4C1 can only be <7>



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