Daily Sudoku Answer 

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R7C6 can only be <5>

R8C9 can only be <6>

R9C8 can only be <4>

R7C3 can only be <4>

R2C9 can only be <5>

R7C7 can only be <8>

R9C9 can only be <2>

R1C1 is the only square in column 1 that can be <4>

Squares R4C3 and R6C3 in column 3 form a simple naked pair. These 2 squares both contain the 2 possibilities <23>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R5C3 - removing <23> from <2357> leaving <57>

Squares R1C9 and R6C9 in column 9 form a simple naked pair. These 2 squares both contain the 2 possibilities <39>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R4C9 - removing <39> from <3489> leaving <48>

R5C9 - removing <39> from <3489> leaving <48>

Squares R1C2 and R5C2 in column 2 and R1C8 and R5C8 in column 8 form a Simple X-Wing pattern on possibility <6>. All other instances of this possibility in rows 1 and 5 can be removed.

R5C1 - removing <6> from <56789> leaving <5789>

R1C4 - removing <6> from <689> leaving <89>

R1C5 - removing <6> from <25689> leaving <2589>

R5C7 - removing <6> from <1269> leaving <129>

Squares R1C4 and R9C4 in column 4 form a simple naked pair. These 2 squares both contain the 2 possibilities <89>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R3C4 - removing <9> from <469> leaving <46>

R5C4 - removing <9> from <349> leaving <34>

Squares R2C1 and R2C5 in row 2 and R8C1 and R8C5 in row 8 form a Simple X-Wing pattern on possibility <7>. All other instances of this possibility in columns 1 and 5 can be removed.

R3C5 - removing <7> from <45679> leaving <4569>

R5C1 - removing <7> from <5789> leaving <589>

R9C1 - removing <7> from <157> leaving <15>

R9C5 - removing <7> from <1789> leaving <189>

Squares R1C4, R9C4, R1C5 and R9C5 form a Type-4 Unique Rectangle on <89>.

R1C5 - removing <9> from <2589> leaving <258>

R9C5 - removing <9> from <189> leaving <18>

Squares R1C2 (XY), R9C2 (XZ) and R2C1 (YZ) form an XY-Wing pattern on <7>. All squares that are buddies of both the XZ and YZ squares cannot be <7>.

R8C1 - removing <7> from <17> leaving <1>

R8C5 can only be <7>

R9C1 can only be <5>

R2C5 can only be <6>

R9C2 can only be <7>

R2C1 can only be <7>

R7C5 can only be <3>

R3C4 can only be <4>

R5C4 can only be <3>

R5C8 can only be <6>

R7C4 can only be <6>

R5C2 can only be <5>

R1C8 can only be <3>

R1C9 can only be <9>

R1C4 can only be <8>

R1C6 can only be <2>

R6C9 can only be <3>

R3C7 can only be <6>

R3C3 can only be <5>

R3C5 can only be <9>

R5C3 can only be <7>

R1C2 can only be <6>

R3C6 can only be <7>

R6C3 can only be <2>

R9C4 can only be <9>

R1C5 can only be <5>

R6C5 can only be <1>

R4C3 can only be <3>

R6C7 can only be <9>

R9C5 can only be <8>

R5C6 can only be <9>

R6C1 can only be <6>

R4C7 can only be <2>

R9C6 can only be <1>

R4C5 can only be <4>

R5C7 can only be <1>

R5C1 can only be <8>

R4C9 can only be <8>

R5C5 can only be <2>

R4C1 can only be <9>

R5C9 can only be <4>

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