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Daily Sudoku Answer 



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Jul 04 - Hard
Puzzle Copyright © Kevin Stone

Share link – www.brainbashers.com/s013514



Reasoning 



R8C1 is the only square in column 1 that can be <3>

R5C6 is the only square in column 6 that can be <3>

R1C8 is the only square in column 8 that can be <9>

Squares R9C2 and R9C5 in row 9 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 row.

R9C3 - removing <15> from <158> leaving <8>

R9C7 - removing <15> from <13578> leaving <378>

R9C8 - removing <5> from <3578> leaving <378>

R3C1 is the only square in row 3 that can be <8>

Squares R8C3 and R9C2 in block 7 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 block.

R7C1 - removing <5> from <569> leaving <69>

R7C2 - removing <15> from <12569> leaving <269>

R7C3 - removing <15> from <1259> leaving <29>

Intersection of row 4 with block 5. The value <1> only appears in one or more of squares R4C4, R4C5 and R4C6 of row 4. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain this value.

R5C4 - removing <1> from <159> leaving <59>

R5C5 - removing <1> from <12567> leaving <2567>

Squares R5C1 and R5C4 in row 5 form a simple naked pair. These 2 squares both contain the 2 possibilities <59>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R5C3 - removing <59> from <259> leaving <2>

R5C5 - removing <5> from <2567> leaving <267>

R7C3 can only be <9>

R7C1 can only be <6>

R7C2 can only be <2>

R2C1 is the only square in row 2 that can be <9>

R5C1 can only be <5>

R5C4 can only be <9>

R6C2 can only be <4>

R1C2 can only be <5>

R4C2 can only be <9>

R9C2 can only be <1>

R9C5 can only be <5>

R3C2 can only be <6>

R8C3 can only be <5>

R3C3 is the only square in row 3 that can be <1>

R4C8 is the only square in column 8 that can be <6>

R5C5 is the only square in row 5 that can be <6>

R6C5 is the only square in column 5 that can be <7>

R6C8 can only be <8>

R6C4 can only be <5>

R7C8 can only be <5>

R3C8 can only be <3>

R9C8 can only be <7>

R6C6 can only be <2>

R2C4 can only be <4>

R9C7 can only be <3>

R2C3 can only be <7>

R2C6 can only be <5>

R1C5 can only be <3>

R3C5 can only be <2>

R3C9 can only be <4>

R3C7 can only be <5>

R7C9 can only be <1>

R1C7 can only be <7>

R7C5 can only be <4>

R5C9 can only be <7>

R8C9 can only be <6>

R1C3 can only be <4>

R2C7 can only be <6>

R5C7 can only be <1>

R2C9 can only be <2>

R7C7 can only be <8>

R4C5 can only be <1>

R8C6 can only be <8>

R8C7 can only be <4>

R8C4 can only be <1>

R4C6 can only be <4>

R4C4 can only be <8>



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