Daily Sudoku Answer 

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R2C2 is the only square in row 2 that can be <5>

R8C5 is the only square in row 8 that can be <8>

R5C4 is the only square in row 5 that can be <8>

R4C8 is the only square in row 4 that can be <8>

R1C9 is the only square in row 1 that can be <8>

R9C6 is the only square in row 9 that can be <5>

R6C4 is the only square in row 6 that can be <5>

R9C3 is the only square in row 9 that can be <8>

R1C3 is the only square in column 3 that can be <4>

R2C3 is the only square in column 3 that can be <6>

R3C9 is the only square in row 3 that can be <6>

R3C8 is the only square in row 3 that can be <4>

R7C4 is the only square in column 4 that can be <6>

R3C5 is the only square in column 5 that can be <2>

Squares R7C5 and R7C6 in row 7 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 row.

R7C1 - removing <47> from <12347> leaving <123>

R7C2 - removing <7> from <1237> leaving <123>

R7C9 - removing <4> from <1234> leaving <123>

Intersection of column 3 with block 4. The values <123> only appears in one or more of squares R4C3, R5C3 and R6C3 of column 3. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain these values.

R4C1 - removing <123> from <12379> leaving <79>

R6C2 - removing <12> from <1279> leaving <79>

Intersection of block 6 with column 7. The value <3> only appears in one or more of squares R4C7, R5C7 and R6C7 of block 6. These squares are the ones that intersect with column 7. Thus, the other (non-intersecting) squares of column 7 cannot contain this value.

R1C7 - removing <3> from <1379> leaving <179>

R9C7 - removing <3> from <34679> leaving <4679>

Squares R7C1<123>, R7C2<123>, R8C2<127> and R9C2<37> in block 7 form a comprehensive naked quad. These 4 squares can only contain the 4 possibilities <1237>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R8C1 - removing <127> from <12467> leaving <46>

R9C1 - removing <37> from <3467> leaving <46>

R4C1 is the only square in column 1 that can be <7>

R4C4 can only be <1>

R6C2 can only be <9>

R3C4 can only be <3>

R1C4 can only be <7>

R2C5 can only be <9>

R5C5 can only be <4>

R3C6 can only be <1>

R3C1 can only be <9>

R5C6 can only be <9>

R7C5 can only be <7>

R4C6 can only be <2>

R7C6 can only be <4>

R4C3 can only be <3>

R6C6 can only be <7>

R4C7 can only be <9>

R5C3 can only be <1>

R1C7 can only be <1>

R5C7 can only be <3>

R6C3 can only be <2>

R6C7 can only be <4>

R2C9 can only be <3>

R2C1 can only be <1>

R2C8 can only be <7>

R1C8 can only be <9>

R6C9 can only be <1>

R7C9 can only be <2>

R8C9 can only be <4>

R8C1 can only be <6>

R9C9 can only be <9>

R7C1 can only be <3>

R8C8 can only be <1>

R9C8 can only be <3>

R7C2 can only be <1>

R1C1 can only be <2>

R9C2 can only be <7>

R8C7 can only be <7>

R9C1 can only be <4>

R8C2 can only be <2>

R9C7 can only be <6>

R1C2 can only be <3>

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