R1C4 is the only square in row 1 that can be <4>

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

R9C4 is the only square in column 4 that can be <2>

Intersection of row 2 with block 2. The values <59> only appears in one or more of squares R2C4, R2C5 and R2C6 of row 2. These squares are the ones that intersect with block 2. Thus, the other (non-intersecting) squares of block 2 cannot contain these values.

R1C5 - removing <5> from <12356> leaving <1236>

R1C6 - removing <5> from <1356> leaving <136>

R3C5 - removing <5> from <1256> leaving <126>

Intersection of row 8 with block 8. The value <9> only appears in one or more of squares R8C4, R8C5 and R8C6 of row 8. These squares are the ones that intersect with block 8. Thus, the other (non-intersecting) squares of block 8 cannot contain this value.

R9C6 - removing <9> from <369> leaving <36>

Squares R6C6 and R9C6 in column 6 form a simple locked pair. These 2 squares both contain the 2 possibilities <36>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C6 - removing <36> from <136> leaving <1>

R2C6 - removing <6> from <1569> leaving <159>

R4C6 - removing <36> from <1368> leaving <18>

R4C6 can only be <8>

R1C5 is the only square in row 1 that can be <3>

R2C8 is the only square in row 2 that can be <1>

R8C8 can only be <8>

R7C5 is the only square in row 7 that can be <8>

R8C2 is the only square in row 8 that can be <1>

R4C1 is the only square in row 4 that can be <1>

R3C3 is the only square in row 3 that can be <1>

R4C8 is the only square in row 4 that can be <2>

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

R6C6 can only be <6>

R6C4 can only be <7>

R6C8 can only be <3>

R9C6 can only be <3>

R5C8 can only be <6>

R9C3 can only be <9>

R5C2 can only be <7>

R4C9 can only be <7>

R6C2 can only be <5>

R6C9 can only be <9>

R8C4 can only be <9>

R5C5 can only be <1>

R8C6 can only be <5>

R2C4 can only be <6>

R8C5 can only be <7>

R2C6 can only be <9>

R9C1 can only be <7>

R5C3 can only be <3>

R2C5 can only be <5>

R3C5 can only be <2>

R4C2 can only be <6>

R7C9 can only be <6>

R5C1 can only be <9>

R7C3 can only be <5>

R6C1 can only be <2>

R1C3 can only be <2>

R7C7 can only be <7>

R3C9 can only be <5>

R9C5 can only be <6>

R9C7 can only be <4>

R7C1 can only be <3>

R9C9 can only be <1>

R5C7 can only be <8>

R3C1 can only be <6>

R1C9 can only be <8>

R5C9 can only be <4>

R1C7 can only be <6>

R1C1 can only be <5>

R3C7 can only be <9>