Daily Sudoku Answer 

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R7C3 can only be <6>

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

R1C8 is the only square in row 1 that can be <4>

R1C7 is the only square in row 1 that can be <1>

R7C7 can only be <2>

R7C1 can only be <1>

R7C9 can only be <7>

R4C5 is the only square in row 4 that can be <8>

R5C5 is the only square in row 5 that can be <3>

R9C1 is the only square in row 9 that can be <8>

R1C4 is the only square in column 4 that can be <9>

Squares R8C5 and R9C4 in block 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <26>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R9C5 - removing <26> from <2467> leaving <47>

R9C6 - removing <2> from <247> leaving <47>

Intersection of row 1 with block 1. The values <36> only appears in one or more of squares R1C1, R1C2 and R1C3 of row 1. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain these values.

R3C1 - removing <3> from <2359> leaving <259>

R3C3 - removing <3> from <359> leaving <59>

Intersection of column 3 with block 1. The value <5> only appears in one or more of squares R1C3, R2C3 and R3C3 of column 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 <5> from <23567> leaving <2367>

R2C1 - removing <5> from <257> leaving <27>

R3C1 - removing <5> from <259> leaving <29>

Squares R2C1, R2C5 and R2C9 in row 2, R3C1 and R3C9 in row 3 and R8C1 and R8C5 in row 8 form a Swordfish pattern on possibility <2>. All other instances of this possibility in columns 1, 5 and 9 can be removed.

R1C1 - removing <2> from <2367> leaving <367>

R1C5 - removing <2> from <257> leaving <57>

Squares R5C8, R9C8, R5C9 and R9C9 form a Type-4 Unique Rectangle on <15>.

R5C9 - removing <5> from <1459> leaving <149>

R9C9 - removing <5> from <1356> leaving <136>

Squares R1C2 (XY), R3C1 (XZ) and R5C2 (YZ) form an XY-Wing pattern on <9>. All squares that are buddies of both the XZ and YZ squares cannot be <9>.

R5C1 - removing <9> from <4569> leaving <456>

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

R4C9 can only be <9>

R5C2 is the only square in row 5 that can be <9>

R9C2 can only be <2>

R9C4 can only be <6>

R1C2 can only be <6>

R8C1 can only be <3>

R5C4 can only be <2>

R8C5 can only be <2>

R5C6 can only be <4>

R5C9 can only be <1>

R9C6 can only be <7>

R6C5 can only be <6>

R5C8 can only be <5>

R9C9 can only be <3>

R6C1 can only be <5>

R8C9 can only be <6>

R1C1 can only be <7>

R9C3 can only be <9>

R3C3 can only be <5>

R9C5 can only be <4>

R1C6 can only be <2>

R9C7 can only be <5>

R1C5 can only be <5>

R2C1 can only be <2>

R1C3 can only be <3>

R2C5 can only be <7>

R2C9 can only be <5>

R3C1 can only be <9>

R3C9 can only be <2>

R6C9 can only be <4>

R3C7 can only be <3>

R5C1 can only be <6>

R9C8 can only be <1>

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