R6C3 can only be <9>

R1C8 is the only square in column 8 that can be <6>

Squares R1C2 and R9C2 in column 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <27>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R3C2 - removing <2> from <259> leaving <59>

R5C2 - removing <2> from <23458> leaving <3458>

R7C2 - removing <27> from <2579> leaving <59>

Squares R3C2 and R7C2 in column 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <59>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R4C2 - removing <5> from <45> leaving <4>

R5C2 - removing <5> from <3458> leaving <348>

R4C7 can only be <1>

Squares R1C5<27>, R6C5<47> and R9C5<247> in column 5 form a comprehensive locked triplet. These 3 squares can only contain the 3 possibilities <247>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C5 - removing <27> from <256789> leaving <5689>

R3C5 - removing <2> from <23589> leaving <3589>

R5C5 - removing <47> from <14679> leaving <169>

R7C5 - removing <27> from <12579> leaving <159>

R8C5 - removing <247> from <234579> leaving <359>

Squares R5C7<348>, R5C9<478>, R6C7<348> and R6C8<478> in block 6 form a comprehensive locked quad. These 4 squares can only contain the 4 possibilities <3478>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R5C8 - removing <478> from <45789> leaving <59>

Squares R3C4 and R3C8 in row 3 and R7C4 and R7C8 in row 7 form a Simple X-Wing pattern on possibility <2>. All other instances of this possibility in columns 4 and 8 can be removed.

R2C4 - removing <2> from <2679> leaving <679>

R8C4 - removing <2> from <279> leaving <79>

R9C8 - removing <2> from <247> leaving <47>

Squares R6C5 and R9C5 in column 5 and R6C8 and R9C8 in column 8 form a Simple X-Wing pattern on possibility <4>. All other instances of this possibility in rows 6 and 9 can be removed.

R6C7 - removing <4> from <348> leaving <38>

Squares R6C2 and R6C7 in row 6 form a simple locked pair. These 2 squares both contain the 2 possibilities <38>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R6C8 - removing <8> from <478> leaving <47>

R3C8 is the only square in column 8 that can be <8>

R2C9 can only be <4>

R2C7 can only be <2>

R2C5 is the only square in row 2 that can be <8>

R2C4 is the only square in row 2 that can be <6>

R3C4 is the only square in row 3 that can be <2>

R1C5 can only be <7>

R1C2 can only be <2>

R6C5 can only be <4>

R6C8 can only be <7>

R9C5 can only be <2>

R7C8 can only be <2>

R9C8 can only be <4>

R5C9 can only be <8>

R9C2 can only be <7>

R8C7 can only be <8>

R5C2 can only be <3>

R8C9 can only be <7>

R6C7 can only be <3>

R6C2 can only be <8>

R5C7 can only be <4>

R8C4 can only be <9>

R2C3 is the only square in row 2 that can be <7>

R7C2 is the only square in row 7 that can be <9>

R3C2 can only be <5>

R2C1 can only be <9>

R2C6 can only be <5>

R7C6 can only be <7>

R7C4 can only be <1>

R5C6 can only be <9>

R5C8 can only be <5>

R3C6 can only be <3>

R4C5 can only be <6>

R5C1 can only be <2>

R4C8 can only be <9>

R7C5 can only be <5>

R5C4 can only be <7>

R8C5 can only be <3>

R8C6 can only be <4>

R3C5 can only be <9>

R4C3 can only be <5>

R5C5 can only be <1>

R5C3 can only be <6>

R8C1 can only be <5>

R8C3 can only be <2>