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Daily Sudoku Answer 



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Nov 23 - Hard
Puzzle Copyright © Kevin Stone

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Reasoning 



R1C1 can only be <9>

R1C5 can only be <6>

R1C8 can only be <3>

R1C2 can only be <1>

R8C3 is the only square in row 8 that can be <4>

Squares R2C3 and R7C3 in column 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <38>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R5C3 - removing <8> from <189> leaving <19>

Squares R2C4 and R3C4 in column 4 form a simple naked pair. These 2 squares both contain the 2 possibilities <27>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R4C4 - removing <27> from <2367> leaving <36>

R5C4 - removing <7> from <57> leaving <5>

R6C4 - removing <27> from <23567> leaving <356>

R6C8 is the only square in row 6 that can be <5>

R8C7 is the only square in column 7 that can be <5>

R8C9 is the only square in row 8 that can be <1>

R2C7 is the only square in column 7 that can be <6>

R3C7 is the only square in column 7 that can be <2>

R3C4 can only be <7>

R2C4 can only be <2>

Squares R5C3 and R5C7 in row 5 form a simple naked pair. These 2 squares both contain the 2 possibilities <19>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R5C5 - removing <19> from <1789> leaving <78>

R5C6 - removing <9> from <789> leaving <78>

Squares R2C5 and R3C5 in column 5 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 column.

R4C5 - removing <89> from <1234789> leaving <12347>

R5C5 - removing <8> from <78> leaving <7>

R6C5 - removing <9> from <123479> leaving <12347>

R5C6 can only be <8>

R8C5 can only be <3>

R7C3 is the only square in row 7 that can be <3>

R2C3 can only be <8>

R2C5 can only be <9>

R3C2 can only be <5>

R2C8 can only be <4>

R3C5 can only be <8>

R2C1 can only be <7>

R3C9 can only be <9>

R3C1 can only be <4>

R9C2 can only be <6>

R9C9 can only be <2>

R9C8 can only be <9>

R8C2 can only be <8>

R4C8 can only be <7>

R9C5 can only be <5>

R7C9 can only be <7>

R2C2 can only be <3>

R6C1 can only be <6>

R6C4 can only be <3>

R4C1 can only be <8>

R6C9 can only be <4>

R4C4 can only be <6>

R4C9 can only be <3>

R8C8 can only be <6>

R4C2 can only be <2>

R7C1 can only be <5>

R8C6 can only be <7>

R7C8 can only be <8>

R7C5 can only be <2>

R6C2 can only be <7>

R4C6 can only be <9>

R4C7 can only be <1>

R6C6 can only be <2>

R4C5 can only be <4>

R5C7 can only be <9>

R5C3 can only be <1>

R6C5 can only be <1>

R7C6 can only be <6>

R6C3 can only be <9>



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