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Daily Sudoku Answer 



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Feb 22 - Hard
Puzzle Copyright © Kevin Stone

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Reasoning 



R5C2 can only be <5>

R8C8 can only be <6>

R7C2 can only be <9>

R7C4 can only be <3>

R5C8 can only be <4>

R2C7 is the only square in row 2 that can be <5>

R3C6 is the only square in row 3 that can be <7>

R6C7 is the only square in row 6 that can be <9>

R7C1 is the only square in row 7 that can be <6>

R9C4 is the only square in column 4 that can be <9>

R8C4 is the only square in column 4 that can be <8>

R3C7 is the only square in column 7 that can be <6>

Squares R2C2 and R2C4 in row 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <14>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R2C6 - removing <1> from <123> leaving <23>

R2C9 - removing <14> from <1234> leaving <23>

Squares R6C6 and R8C6 in column 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <15>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C6 - removing <1> from <123> leaving <23>

Squares R1C6 and R1C7 in row 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <23>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R1C1 - removing <2> from <125> leaving <15>

R1C3 - removing <2> from <1245> leaving <145>

R1C5 - removing <23> from <12349> leaving <149>

R1C8 - removing <2> from <289> leaving <89>

R1C9 - removing <23> from <12348> leaving <148>

R3C1 is the only square in block 1 that can be <2>

R3C8 can only be <9>

R1C8 can only be <8>

R4C8 can only be <2>

R4C7 can only be <7>

R5C9 can only be <6>

R5C5 can only be <3>

R6C9 can only be <8>

R6C2 can only be <1>

R5C1 can only be <7>

R6C3 can only be <2>

R6C6 can only be <5>

R2C2 can only be <4>

R4C3 can only be <3>

R6C5 can only be <6>

R8C6 can only be <1>

R9C5 can only be <2>

R9C7 can only be <3>

R7C5 can only be <5>

R9C9 can only be <7>

R1C7 can only be <2>

R7C9 can only be <2>

R1C6 can only be <3>

R2C9 can only be <3>

R2C4 can only be <1>

R9C2 can only be <8>

R4C4 can only be <4>

R3C5 can only be <4>

R2C6 can only be <2>

R3C9 can only be <1>

R1C5 can only be <9>

R4C5 can only be <1>

R1C9 can only be <4>

R4C1 can only be <8>

R8C3 can only be <5>

R7C3 can only be <7>

R8C1 can only be <3>

R1C3 can only be <1>

R9C1 can only be <1>

R1C1 can only be <5>

R9C3 can only be <4>



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