R5C1 can only be <2>

R9C5 can only be <3>

R2C7 is the only square in row 2 that can be <3>

R3C2 is the only square in row 3 that can be <1>

R4C4 is the only square in row 4 that can be <3>

R8C2 is the only square in row 8 that can be <3>

R5C2 is the only square in column 2 that can be <6>

R7C2 is the only square in column 2 that can be <9>

R6C4 is the only square in column 4 that can be <2>

R7C4 is the only square in column 4 that can be <4>

Squares R2C1 and R2C9 in row 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <45>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R2C2 - removing <4> from <248> leaving <28>

R2C3 - removing <45> from <24578> leaving <278>

R2C8 - removing <45> from <4567> leaving <67>

Squares R4C3 and R6C3 in column 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <49>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R8C3 - removing <4> from <2458> leaving <258>

Intersection of row 2 with block 1. The value <8> only appears in one or more of squares R2C1, R2C2 and R2C3 of row 2. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R3C3 - removing <8> from <578> leaving <57>

Intersection of row 4 with block 5. The value <5> only appears in one or more of squares R4C4, R4C5 and R4C6 of row 4. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain this value.

R5C5 - removing <5> from <1579> leaving <179>

R5C6 - removing <5> from <578> leaving <78>

Squares R5C4 and R5C6 in row 5 form a simple locked pair. These 2 squares both contain the 2 possibilities <78>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R5C5 - removing <7> from <179> leaving <19>

Intersection of column 2 with block 1. The value <2> only appears in one or more of squares R1C2, R2C2 and R3C2 of column 2. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R2C3 - removing <2> from <278> leaving <78>

Intersection of column 8 with block 3. The value <6> only appears in one or more of squares R1C8, R2C8 and R3C8 of column 8. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.

R3C7 - removing <6> from <679> leaving <79>

Squares R1C2 and R1C8 in row 1 and R9C2 and R9C8 in row 9 form a Simple X-Wing pattern on possibility <4>. All other instances of this possibility in columns 2 and 8 can be removed.

R8C8 - removing <4> from <4789> leaving <789>

Squares R5C4, R5C6, R3C4 and R3C6 form a Type-1 Unique Rectangle on <78>.

R3C6 - removing <78> from <678> leaving <6>

R6C6 can only be <4>

R6C3 can only be <9>

R4C6 can only be <5>

R7C6 can only be <7>

R4C3 can only be <4>

R7C8 can only be <1>

R5C6 can only be <8>

R8C5 can only be <5>

R7C7 can only be <2>

R8C1 can only be <4>

R5C4 can only be <7>

R7C3 can only be <5>

R8C9 can only be <9>

R2C1 can only be <5>

R9C2 can only be <8>

R8C7 can only be <7>

R5C9 can only be <5>

R9C8 can only be <4>

R2C2 can only be <2>

R8C3 can only be <2>

R1C8 can only be <7>

R1C5 can only be <2>

R2C8 can only be <6>

R8C8 can only be <8>

R3C7 can only be <9>

R2C9 can only be <4>

R3C3 can only be <7>

R2C5 can only be <7>

R1C2 can only be <4>

R2C3 can only be <8>

R3C4 can only be <8>

R3C8 can only be <5>

R4C7 can only be <6>

R5C8 can only be <9>

R4C5 can only be <9>

R6C7 can only be <1>

R5C5 can only be <1>

R6C5 can only be <6>