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Daily Sudoku Answer 



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Nov 03 - Hard
Puzzle Copyright © Kevin Stone

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Reasoning 



R7C4 is the only square in row 7 that can be <2>

R2C1 is the only square in column 1 that can be <8>

R9C1 is the only square in column 1 that can be <5>

R8C1 is the only square in column 1 that can be <6>

R9C8 is the only square in row 9 that can be <6>

R5C2 is the only square in column 2 that can be <8>

Squares R5C8 and R6C9 in block 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <47>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R6C7 - removing <7> from <257> leaving <25>

R6C8 - removing <47> from <2457> leaving <25>

Squares R6C7 and R6C8 in row 6 form a simple naked pair. These 2 squares both contain the 2 possibilities <25>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R6C5 - removing <5> from <579> leaving <79>

R6C6 - removing <5> from <5789> leaving <789>

Squares R6C6, R8C6 and R9C6 in column 6 form a simple naked triplet. These 3 squares all contain the 3 possibilities <789>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R3C6 - removing <7> from <127> leaving <12>

R4C6 - removing <7> from <157> leaving <15>

R5C6 - removing <7> from <67> leaving <6>

R3C8 is the only square in row 3 that can be <7>

R5C8 can only be <4>

R5C4 can only be <7>

R6C9 can only be <7>

R6C5 can only be <9>

R7C9 can only be <9>

R2C9 can only be <1>

R1C9 can only be <8>

R2C4 can only be <6>

R6C6 can only be <8>

R6C4 can only be <4>

R8C9 can only be <4>

R2C3 can only be <9>

R1C4 can only be <1>

R4C4 can only be <3>

R3C6 can only be <2>

R2C8 can only be <2>

R2C2 can only be <5>

R6C8 can only be <5>

R1C7 can only be <3>

R3C1 can only be <4>

R1C6 can only be <5>

R4C5 can only be <5>

R9C4 can only be <8>

R4C6 can only be <1>

R2C5 can only be <7>

R6C7 can only be <2>

R7C8 can only be <3>

R7C2 can only be <7>

R1C8 can only be <9>

R8C8 can only be <1>

R9C7 can only be <7>

R9C6 can only be <9>

R7C7 can only be <5>

R8C7 can only be <8>

R1C2 can only be <2>

R1C3 can only be <6>

R8C5 can only be <3>

R3C3 can only be <3>

R4C1 can only be <2>

R3C2 can only be <1>

R9C3 can only be <4>

R4C2 can only be <4>

R8C2 can only be <9>

R4C3 can only be <7>

R9C2 can only be <3>

R8C6 can only be <7>



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