R2C2 can only be <9>

R5C5 can only be <7>

R9C1 can only be <1>

R8C2 can only be <5>

R1C1 can only be <2>

R3C3 can only be <8>

R8C8 can only be <4>

R7C3 can only be <9>

R5C1 can only be <3>

R6C3 can only be <2>

R6C8 can only be <8>

R6C2 can only be <4>

R5C2 can only be <6>

R4C2 can only be <8>

R5C8 is the only square in row 5 that can be <2>

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

R6C9 is the only square in row 6 that can be <3>

Squares R1C6 and R1C9 in row 1 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 row.

R1C5 - removing <59> from <3589> leaving <38>

Squares R3C5 and R3C7 in row 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <69>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R3C4 - removing <6> from <146> leaving <14>

R3C6 - removing <9> from <149> leaving <14>

Squares R9C6 and R9C9 in row 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <57>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R9C4 - removing <7> from <678> leaving <68>

R9C5 - removing <5> from <568> leaving <68>

Squares R1C5<38>, R3C5<69>, R8C5<39> and R9C5<68> in column 5 form a comprehensive locked quad. These 4 squares can only contain the 4 possibilities <3689>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C5 - removing <6> from <256> leaving <25>

Squares R1C6 and R1C9 in row 1 and R9C6 and R9C9 in row 9 form a Simple X-Wing pattern on possibility <5>. All other instances of this possibility in columns 6 and 9 can be removed.

R2C6 - removing <5> from <257> leaving <27>

R4C9 - removing <5> from <579> leaving <79>

R7C6 - removing <5> from <2457> leaving <247>

Squares R4C1 and R4C9 in row 4 form a simple locked pair. These 2 squares both contain the 2 possibilities <79>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R4C7 - removing <79> from <15679> leaving <156>

Squares R5C3, R5C7, R4C3 and R4C7 form a Type-1 Unique Rectangle on <15>.

R4C7 - removing <15> from <156> leaving <6>

R4C8 can only be <5>

R3C7 can only be <9>

R4C3 can only be <1>

R2C8 can only be <6>

R5C7 can only be <1>

R5C3 can only be <5>

R2C4 can only be <7>

R3C5 can only be <6>

R6C7 can only be <7>

R1C9 can only be <5>

R6C1 can only be <9>

R7C7 can only be <5>

R4C9 can only be <9>

R7C5 can only be <2>

R9C9 can only be <7>

R9C6 can only be <5>

R1C6 can only be <9>

R2C6 can only be <2>

R7C4 can only be <4>

R2C5 can only be <5>

R9C5 can only be <8>

R4C1 can only be <7>

R7C6 can only be <7>

R3C4 can only be <1>

R9C4 can only be <6>

R1C5 can only be <3>

R1C4 can only be <8>

R8C5 can only be <9>

R8C6 can only be <1>

R3C6 can only be <4>

R8C4 can only be <3>