Daily Sudoku Answer 

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R8C4 can only be <8>

R9C4 can only be <1>

R7C4 can only be <6>

R6C4 can only be <2>

R1C6 is the only square in row 1 that can be <2>

R1C1 is the only square in row 1 that can be <3>

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

R2C6 is the only square in row 2 that can be <6>

R6C2 is the only square in row 6 that can be <8>

R7C2 is the only square in row 7 that can be <1>

R7C3 is the only square in row 7 that can be <3>

R6C3 can only be <4>

R6C7 can only be <3>

R5C2 is the only square in row 5 that can be <3>

R7C7 is the only square in row 7 that can be <5>

R3C9 is the only square in row 3 that can be <5>

R8C6 is the only square in row 8 that can be <3>

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

R7C1 can only be <4>

R7C8 can only be <8>

R2C2 is the only square in column 2 that can be <4>

R3C3 is the only square in column 3 that can be <6>

R5C7 is the only square in column 7 that can be <2>

R8C8 is the only square in block 9 that can be <9>

Squares R8C5 and R9C5 in column 5 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.

R4C5 - removing <4> from <1459> leaving <159>

R5C5 - removing <4> from <14589> leaving <1589>

Squares R8C9 and R9C9 in column 9 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.

R1C9 - removing <4> from <146> leaving <16>

R5C9 - removing <4> from <146> leaving <16>

Squares R5C1<79>, R5C3<579> and R5C4<59> in row 5 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <579>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R5C5 - removing <59> from <1589> leaving <18>

R5C8 - removing <7> from <1467> leaving <146>

Intersection of row 5 with block 4. The value <7> 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.

R4C3 - removing <7> from <579> leaving <59>

Squares R4C6<14>, R5C5<18> and R5C6<148> in block 5 form a comprehensive naked triplet. These 3 squares can only contain the 3 possibilities <148>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R4C5 - removing <1> from <159> leaving <59>

Squares R3C6 and R3C8 in row 3 and R4C6 and R4C8 in row 4 form a Simple X-Wing pattern on possibility <1>. All other instances of this possibility in columns 6 and 8 can be removed.

R1C8 - removing <1> from <146> leaving <46>

R5C6 - removing <1> from <148> leaving <48>

R5C8 - removing <1> from <146> leaving <46>

Squares R1C8 and R5C8 in column 8 form a simple naked pair. These 2 squares both contain the 2 possibilities <46>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R4C8 - removing <4> from <147> leaving <17>

Squares R2C1 and R5C1 in column 1 and R2C4 and R5C4 in column 4 form a Simple X-Wing pattern on possibility <9>. All other instances of this possibility in rows 2 and 5 can be removed.

R5C3 - removing <9> from <579> leaving <57>

R2C5 - removing <9> from <589> leaving <58>

R2C7 - removing <9> from <789> leaving <78>

Squares R3C8 (XY), R3C6 (XZ) and R2C7 (YZ) form an XY-Wing pattern on <8>. All squares that are buddies of both the XZ and YZ squares cannot be <8>.

R2C5 - removing <8> from <58> leaving <5>

R3C7 - removing <8> from <789> leaving <79>

R2C4 can only be <9>

R4C5 can only be <9>

R4C3 can only be <5>

R1C5 can only be <1>

R5C4 can only be <5>

R5C3 can only be <7>

R1C9 can only be <6>

R5C5 can only be <8>

R3C6 can only be <8>

R1C8 can only be <4>

R5C9 can only be <1>

R2C1 can only be <7>

R5C6 can only be <4>

R5C1 can only be <9>

R8C3 can only be <2>

R5C8 can only be <6>

R4C6 can only be <1>

R4C8 can only be <7>

R8C9 can only be <4>

R9C3 can only be <9>

R8C5 can only be <7>

R9C9 can only be <2>

R9C2 can only be <7>

R1C7 can only be <9>

R2C7 can only be <8>

R3C2 can only be <9>

R3C7 can only be <7>

R3C8 can only be <1>

R4C7 can only be <4>

R9C5 can only be <4>

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