Daily Sudoku Answer 

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R8C6 can only be <7>

R3C5 is the only square in row 3 that can be <7>

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

R6C7 is the only square in row 6 that can be <7>

R5C2 is the only square in row 5 that can be <7>

R1C5 is the only square in column 5 that can be <8>

R4C7 is the only square in column 7 that can be <8>

R4C9 is the only square in row 4 that can be <3>

R4C5 is the only square in row 4 that can be <1>

R5C8 is the only square in row 5 that can be <1>

R6C5 is the only square in column 5 that can be <6>

R9C7 is the only square in column 7 that can be <9>

R6C9 is the only square in column 9 that can be <9>

R3C7 is the only square in block 3 that can be <6>

Squares R2C4 and R2C9 in row 2 form a simple naked pair. These 2 squares both contain the 2 possibilities <24>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R2C2 - removing <4> from <346> leaving <36>

Squares R2C2 and R2C3 in block 1 form a simple naked pair. These 2 squares both contain the 2 possibilities <36>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R1C3 - removing <3> from <359> leaving <59>

Intersection of row 8 with block 9. The value <3> only appears in one or more of squares R8C7, R8C8 and R8C9 of row 8. These squares are the ones that intersect with block 9. Thus, the other (non-intersecting) squares of block 9 cannot contain this value.

R7C7 - removing <3> from <2345> leaving <245>

R7C8 - removing <3> from <2346> leaving <246>

R7C5 is the only square in row 7 that can be <3>

Intersection of block 3 with column 9. The value <2> only appears in one or more of squares R1C9, R2C9 and R3C9 of block 3. These squares are the ones that intersect with column 9. Thus, the other (non-intersecting) squares of column 9 cannot contain this value.

R7C9 - removing <2> from <1245> leaving <145>

Intersection of block 7 with column 1. The value <6> only appears in one or more of squares R7C1, R8C1 and R9C1 of block 7. These squares are the ones that intersect with column 1. Thus, the other (non-intersecting) squares of column 1 cannot contain this value.

R4C1 - removing <6> from <469> leaving <49>

Squares R1C1<459>, R1C3<59> and R3C2<45> in block 1 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <459>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R3C1 - removing <45> from <1458> leaving <18>

R3C3 - removing <5> from <158> leaving <18>

Squares R3C2 and R4C2 in column 2 and R3C6 and R4C6 in column 6 form a Simple X-Wing pattern on possibility <4>. All other instances of this possibility in rows 3 and 4 can be removed.

R4C1 - removing <4> from <49> leaving <9>

R3C9 - removing <4> from <245> leaving <25>

R1C3 is the only square in row 1 that can be <9>

Squares R1C1 and R1C7 in row 1 and R8C1 and R8C7 in row 8 form a Simple X-Wing pattern on possibility <5>. All other instances of this possibility in columns 1 and 7 can be removed.

R6C1 - removing <5> from <458> leaving <48>

R7C1 - removing <5> from <156> leaving <16>

R7C7 - removing <5> from <245> leaving <24>

Squares R5C7 and R7C7 in column 7 form a simple naked pair. These 2 squares both contain the 2 possibilities <24>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C7 - removing <4> from <345> leaving <35>

Intersection of block 4 with column 3. The values <25> only appears in one or more of squares R4C3, R5C3 and R6C3 of block 4. These squares are the ones that intersect with column 3. Thus, the other (non-intersecting) squares of column 3 cannot contain these values.

R9C3 - removing <5> from <135> leaving <13>

Squares R5C5 (XY), R4C6 (XZ) and R5C3 (YZ) form an XY-Wing pattern on <2>. All squares that are buddies of both the XZ and YZ squares cannot be <2>.

R4C3 - removing <2> from <26> leaving <6>

R4C2 can only be <4>

R2C3 can only be <3>

R2C2 can only be <6>

R9C3 can only be <1>

R4C6 can only be <2>

R3C2 can only be <5>

R6C1 can only be <8>

R3C6 can only be <4>

R3C1 can only be <1>

R3C3 can only be <8>

R7C1 can only be <6>

R3C9 can only be <2>

R9C2 can only be <3>

R1C1 can only be <4>

R2C4 can only be <2>

R2C9 can only be <4>

R8C1 can only be <5>

R8C7 can only be <3>

R8C8 can only be <6>

R1C7 can only be <5>

R1C8 can only be <3>

R9C9 can only be <5>

R9C5 can only be <4>

R7C9 can only be <1>

R5C5 can only be <5>

R7C4 can only be <5>

R5C3 can only be <2>

R6C4 can only be <4>

R6C8 can only be <2>

R6C3 can only be <5>

R7C8 can only be <4>

R5C7 can only be <4>

R7C7 can only be <2>

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