Daily Sudoku Answer 

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R2C3 can only be <7>

R2C5 can only be <8>

R5C2 can only be <1>

R2C7 can only be <5>

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

R4C6 is the only square in row 4 that can be <5>

Squares R1C7 and R8C7 in column 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 column.

R5C7 - removing <7> from <378> leaving <38>

R9C7 - removing <47> from <3478> leaving <38>

Intersection of row 3 with block 1. The value <9> only appears in one or more of squares R3C1, R3C2 and R3C3 of row 3. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R1C1 - removing <9> from <349> leaving <34>

Intersection of column 3 with block 7. The value <4> only appears in one or more of squares R7C3, R8C3 and R9C3 of column 3. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.

R7C1 - removing <4> from <24789> leaving <2789>

R7C2 - removing <4> from <49> leaving <9>

R9C1 - removing <4> from <2478> leaving <278>

R3C2 can only be <4>

R3C8 can only be <8>

R1C1 can only be <3>

R3C9 can only be <6>

R5C8 can only be <7>

R3C5 can only be <3>

R1C9 can only be <7>

R7C8 can only be <4>

R8C7 can only be <7>

R1C7 can only be <4>

R3C1 can only be <9>

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

Squares R4C1 and R4C9 in row 4 and R7C1 and R7C9 in row 7 form a Simple X-Wing pattern on possibility <8>. All other instances of this possibility in columns 1 and 9 can be removed.

R6C1 - removing <8> from <248> leaving <24>

R6C9 - removing <8> from <18> leaving <1>

R9C1 - removing <8> from <278> leaving <27>

R9C9 - removing <8> from <238> leaving <23>

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

R6C6 is the only square in row 6 that can be <8>

Squares R6C1 (XY), R9C1 (XZ) and R6C4 (YZ) form an XY-Wing pattern on <7>. All squares that are buddies of both the XZ and YZ squares cannot be <7>.

R9C4 - removing <7> from <467> leaving <46>

R9C1 is the only square in row 9 that can be <7>

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

R6C4 is the only square in row 6 that can be <7>

Squares R6C1 and R8C3 form a remote naked pair. <24> can be removed from any square that is common to their groups.

R5C3 - removing <2> from <28> leaving <8>

R7C1 - removing <2> from <28> leaving <8>

R5C7 can only be <3>

R4C1 can only be <4>

R5C4 can only be <9>

R9C7 can only be <8>

R4C9 can only be <8>

R7C9 can only be <2>

R9C9 can only be <3>

R4C4 can only be <3>

R6C1 can only be <2>

R5C6 can only be <2>

R1C4 can only be <6>

R9C6 can only be <6>

R6C5 can only be <4>

R8C5 can only be <2>

R8C3 can only be <4>

R9C4 can only be <4>

R1C6 can only be <9>

R9C3 can only be <2>

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