Daily Sudoku Answer 

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R7C2 can only be <4>

R1C5 is the only square in row 1 that can be <3>

R4C5 is the only square in row 4 that can be <7>

R5C8 is the only square in row 5 that can be <3>

R9C3 is the only square in column 3 that can be <9>

R8C3 is the only square in column 3 that can be <5>

R1C7 is the only square in column 7 that can be <7>

Squares R7C1 and R9C1 in column 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <68>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C1 - removing <6> from <146> leaving <14>

R3C1 - removing <6> from <1467> leaving <147>

R5C1 - removing <8> from <1478> leaving <147>

Intersection of column 7 with block 6. The value <4> only appears in one or more of squares R4C7, R5C7 and R6C7 of column 7. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain this value.

R5C9 - removing <4> from <1458> leaving <158>

Squares R4C7<48>, R5C7<1458>, R6C7<145> and R8C7<18> in column 7 form a comprehensive naked quad. These 4 squares can only contain the 4 possibilities <1458>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C7 - removing <1> from <126> leaving <26>

R9C7 - removing <58> from <2568> leaving <26>

Intersection of column 7 with block 6. The values <45> only appears in one or more of squares R4C7, R5C7 and R6C7 of column 7. These squares are the ones that intersect with block 6. Thus, the other (non-intersecting) squares of block 6 cannot contain these values.

R5C9 - removing <5> from <158> leaving <18>

Squares R3C6 and R7C6 in column 6 and R3C8 and R7C8 in column 8 form a Simple X-Wing pattern on possibility <1>. All other instances of this possibility in rows 3 and 7 can be removed.

R3C1 - removing <1> from <147> leaving <47>

R3C5 - removing <1> from <1568> leaving <568>

R7C5 - removing <1> from <12589> leaving <2589>

R3C9 - removing <1> from <146> leaving <46>

R7C9 - removing <1> from <1568> leaving <568>

Squares R7C1<68>, R7C4<58> and R7C9<568> in row 7 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <568>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R7C5 - removing <58> from <2589> leaving <29>

R7C6 - removing <5> from <159> leaving <19>

Squares R1C1 and R5C1 in column 1 and R1C9 and R5C9 in column 9 form a Simple X-Wing pattern on possibility <1>. All other instances of this possibility in rows 1 and 5 can be removed.

R1C3 - removing <1> from <146> leaving <46>

R5C3 - removing <1> from <1248> leaving <248>

R5C7 - removing <1> from <1458> leaving <458>

Squares R2C7 (XY), R3C8 (XZ) and R2C5 (YZ) form an XY-Wing pattern on <1>. All squares that are buddies of both the XZ and YZ squares cannot be <1>.

R3C6 - removing <1> from <15> leaving <5>

R5C6 can only be <9>

R7C6 can only be <1>

R7C8 can only be <2>

R8C5 can only be <8>

R7C5 can only be <9>

R3C8 can only be <1>

R9C7 can only be <6>

R8C7 can only be <1>

R3C5 can only be <6>

R7C4 can only be <5>

R9C1 can only be <8>

R2C7 can only be <2>

R3C4 can only be <8>

R3C9 can only be <4>

R2C5 can only be <1>

R3C1 can only be <7>

R1C9 can only be <6>

R7C9 can only be <8>

R5C4 can only be <6>

R9C5 can only be <2>

R7C1 can only be <6>

R5C9 can only be <1>

R9C9 can only be <5>

R1C3 can only be <4>

R2C3 can only be <6>

R3C2 can only be <2>

R5C2 can only be <7>

R5C1 can only be <4>

R1C1 can only be <1>

R4C3 can only be <8>

R6C3 can only be <1>

R4C7 can only be <4>

R5C3 can only be <2>

R6C7 can only be <5>

R5C5 can only be <5>

R5C7 can only be <8>

R6C5 can only be <4>

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