R7C3 can only be <1>

R7C9 is the only square in row 7 that can be <8>

R9C3 is the only square in column 3 that can be <6>

Intersection of row 4 with block 5. The value <4> 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 <4> from <12346> leaving <1236>

R5C6 - removing <4> from <1467> leaving <167>

Squares R5C6, R5C7 and R5C9 in row 5 form a simple locked triplet. These 3 squares all contain the 3 possibilities <167>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R5C1 - removing <1> from <1348> leaving <348>

R5C4 - removing <7> from <2378> leaving <238>

R5C5 - removing <16> from <1236> leaving <23>

Intersection of column 1 with block 1. The value <1> only appears in one or more of squares R1C1, R2C1 and R3C1 of column 1. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R2C2 - removing <1> from <1237> leaving <237>

Intersection of column 3 with block 1. The value <2> only appears in one or more of squares R1C3, R2C3 and R3C3 of column 3. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R1C2 - removing <2> from <2578> leaving <578>

R2C2 - removing <2> from <237> leaving <37>

Intersection of block 2 with row 2. The value <7> only appears in one or more of squares R2C4, R2C5 and R2C6 of block 2. These squares are the ones that intersect with row 2. Thus, the other (non-intersecting) squares of row 2 cannot contain this value.

R2C1 - removing <7> from <1347> leaving <134>

R2C2 - removing <7> from <37> leaving <3>

R2C8 - removing <7> from <12467> leaving <1246>

R2C9 - removing <7> from <1367> leaving <136>

R4C2 can only be <1>

R6C2 can only be <8>

R6C4 can only be <5>

R8C4 can only be <3>

R4C4 can only be <7>

R4C8 can only be <9>

R2C4 can only be <2>

R4C6 can only be <4>

R5C4 can only be <8>

R3C5 can only be <4>

R3C3 can only be <2>

R1C5 can only be <6>

R4C5 can only be <3>

R5C5 can only be <2>

R2C6 can only be <7>

R1C3 can only be <4>

R5C3 can only be <3>

R2C1 can only be <1>

R2C9 can only be <6>

R3C1 can only be <7>

R2C8 can only be <4>

R3C7 can only be <1>

R1C2 can only be <5>

R3C9 can only be <3>

R5C1 can only be <4>

R1C1 can only be <8>

R8C2 can only be <2>

R9C2 can only be <7>

R7C7 is the only square in row 7 that can be <7>

R5C7 can only be <6>

R5C6 can only be <1>

R6C8 can only be <1>

R6C5 can only be <9>

R8C8 can only be <6>

R9C8 can only be <2>

R5C9 can only be <7>

R9C7 can only be <9>

R1C8 can only be <7>

R1C9 can only be <9>

R1C7 can only be <2>

R8C6 can only be <9>

R6C6 can only be <6>

R7C5 can only be <5>

R7C1 can only be <9>

R9C5 can only be <1>

R8C1 can only be <5>

R9C9 can only be <5>

R9C1 can only be <3>

R8C9 can only be <1>