Daily Sudoku Answer 

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R1C9 is the only square in row 1 that can be <7>

R2C4 is the only square in row 2 that can be <2>

R3C5 can only be <1>

R5C5 can only be <7>

R2C7 is the only square in row 2 that can be <4>

R3C1 is the only square in row 3 that can be <2>

R4C9 is the only square in row 4 that can be <2>

R4C1 is the only square in row 4 that can be <4>

R5C9 is the only square in row 5 that can be <4>

R7C5 is the only square in row 7 that can be <2>

R8C7 is the only square in row 8 that can be <2>

R8C6 is the only square in row 8 that can be <4>

R9C4 is the only square in row 9 that can be <7>

R8C4 can only be <8>

R1C4 can only be <9>

R9C5 can only be <3>

R9C6 can only be <6>

R1C5 can only be <8>

R4C6 can only be <9>

R6C6 can only be <8>

R2C8 is the only square in row 2 that can be <8>

Intersection of row 2 with block 1. The value <9> only appears in one or more of squares R2C1, R2C2 and R2C3 of row 2. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R3C2 - removing <9> from <569> leaving <56>

Intersection of row 5 with block 4. The value <9> only appears in one or more of squares R5C1, R5C2 and R5C3 of row 5. These squares are the ones that intersect with block 4. Thus, the other (non-intersecting) squares of block 4 cannot contain this value.

R6C1 - removing <9> from <1569> leaving <156>

R6C2 - removing <9> from <13569> leaving <1356>

R2C2 is the only square in column 2 that can be <9>

Intersection of row 8 with block 7. The value <5> only appears in one or more of squares R8C1, R8C2 and R8C3 of row 8. These squares are the ones that intersect with block 7. Thus, the other (non-intersecting) squares of block 7 cannot contain this value.

R9C1 - removing <5> from <1589> leaving <189>

R9C3 - removing <5> from <159> leaving <19>

Squares R1C3 and R5C3 in column 3 and R1C7 and R5C7 in column 7 form a Simple X-Wing pattern on possibility <6>. All other instances of this possibility in rows 1 and 5 can be removed.

R1C1 - removing <6> from <156> leaving <15>

R5C1 - removing <6> from <169> leaving <19>

Squares R1C1 and R1C3 in row 1, R5C1, R5C3 and R5C7 in row 5 and R9C1, R9C3 and R9C7 in row 9 form a Swordfish pattern on possibility <1>. All other instances of this possibility in columns 1, 3 and 7 can be removed.

R6C1 - removing <1> from <156> leaving <56>

R8C3 - removing <1> from <15> leaving <5>

R2C3 can only be <3>

R2C6 can only be <5>

R1C6 can only be <3>

Squares R1C1 (XY), R1C3 (XZ) and R6C1 (YZ) form an XY-Wing pattern on <6>. All squares that are buddies of both the XZ and YZ squares cannot be <6>.

R5C3 - removing <6> from <169> leaving <19>

R5C7 is the only square in row 5 that can be <6>

R1C7 can only be <5>

R1C1 can only be <1>

R9C7 can only be <1>

R3C9 can only be <9>

R3C8 can only be <6>

R6C9 can only be <3>

R7C9 can only be <8>

R4C8 can only be <1>

R7C1 can only be <6>

R9C9 can only be <5>

R9C3 can only be <9>

R8C8 can only be <7>

R1C3 can only be <6>

R5C1 can only be <9>

R3C2 can only be <5>

R4C4 can only be <6>

R6C8 can only be <9>

R5C3 can only be <1>

R9C1 can only be <8>

R6C2 can only be <6>

R6C1 can only be <5>

R6C4 can only be <1>

R4C2 can only be <3>

R7C2 can only be <7>

R7C8 can only be <3>

R8C2 can only be <1>

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