R3C2 can only be <9>

R3C3 can only be <6>

R3C4 can only be <4>

R5C5 is the only square in row 5 that can be <3>

R6C7 is the only square in row 6 that can be <7>

R3C7 can only be <8>

R3C9 can only be <7>

R8C6 is the only square in row 8 that can be <4>

R9C3 is the only square in column 3 that can be <3>

R9C1 is the only square in row 9 that can be <9>

R9C8 is the only square in row 9 that can be <7>

R8C1 is the only square in row 8 that can be <7>

R8C4 is the only square in row 8 that can be <6>

R9C9 is the only square in row 9 that can be <6>

R2C7 is the only square in row 2 that can be <6>

R1C5 is the only square in row 1 that can be <6>

R7C1 is the only square in row 7 that can be <6>

R7C8 is the only square in row 7 that can be <8>

R4C9 is the only square in row 4 that can be <8>

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

R6C1 is the only square in row 6 that can be <8>

R9C5 is the only square in column 5 that can be <2>

R1C7 is the only square in column 7 that can be <9>

Squares R6C2 and R9C2 in column 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <15>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C2 - removing <5> from <235> leaving <23>

R2C2 - removing <5> from <235> leaving <23>

R2C8 is the only square in row 2 that can be <5>

R1C1 is the only square in row 1 that can be <5>

R5C1 can only be <2>

Squares R4C5 and R6C5 in block 5 form a simple locked pair. These 2 squares both contain the 2 possibilities <14>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R4C4 - removing <1> from <159> leaving <59>

R6C6 - removing <1> from <159> leaving <59>

Intersection of column 9 with block 3. The value <2> only appears in one or more of squares R1C9, R2C9 and R3C9 of column 9. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain this value.

R1C8 - removing <2> from <124> leaving <14>

Squares R6C2 and R7C6 form a remote locked pair. <15> can be removed from any square that is common to their groups.

R6C6 - removing <5> from <59> leaving <9>

R4C4 can only be <5>

R9C4 can only be <1>

R9C2 can only be <5>

R2C4 can only be <9>

R7C6 can only be <5>

R6C2 can only be <1>

R6C5 can only be <4>

R6C3 can only be <5>

R4C5 can only be <1>

R4C7 can only be <2>

R4C8 can only be <4>

R7C7 can only be <1>

R4C3 can only be <9>

R1C8 can only be <1>

R5C9 can only be <1>

R5C7 can only be <5>

R2C9 can only be <2>

R5C3 can only be <4>

R7C3 can only be <2>

R8C8 can only be <2>

R8C3 can only be <1>

R1C6 can only be <3>

R2C2 can only be <3>

R1C9 can only be <4>

R1C2 can only be <2>

R2C6 can only be <1>