R2C8 is the only square in row 2 that can be <3>

R7C4 is the only square in row 7 that can be <7>

R7C6 is the only square in row 7 that can be <3>

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

R9C8 is the only square in row 9 that can be <6>

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

R5C9 is the only square in column 9 that can be <7>

Intersection of row 1 with block 1. The value <5> only appears in one or more of squares R1C1, R1C2 and R1C3 of row 1. These squares are the ones that intersect with block 1. Thus, the other (non-intersecting) squares of block 1 cannot contain this value.

R3C1 - removing <5> from <2456> leaving <246>

R5C1 is the only square in column 1 that can be <5>

Squares R4C3 and R6C3 in column 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <48>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C3 - removing <4> from <2459> leaving <259>

R7C3 - removing <48> from <2489> leaving <29>

R9C3 - removing <8> from <589> leaving <59>

Squares R9C2 and R9C3 in row 9 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.

R9C5 - removing <9> from <189> leaving <18>

R9C7 - removing <9> from <189> leaving <18>

Squares R2C4, R5C4 and R8C4 in column 4 form a simple locked triplet. These 3 squares all contain the 3 possibilities <189>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R3C4 - removing <9> from <59> leaving <5>

R4C4 - removing <18> from <1348> leaving <34>

R6C4 - removing <8> from <3458> leaving <345>

R6C6 is the only square in row 6 that can be <5>

R6C2 is the only square in row 6 that can be <6>

R2C2 can only be <9>

R9C2 can only be <5>

R9C3 can only be <9>

R1C2 can only be <4>

R7C3 can only be <2>

R4C2 can only be <7>

R1C3 can only be <5>

R4C6 is the only square in row 4 that can be <6>

R6C5 is the only square in row 6 that can be <7>

R7C7 is the only square in row 7 that can be <9>

R3C6 is the only square in row 3 that can be <9>

R1C8 is the only square in row 1 that can be <9>

R8C4 is the only square in row 8 that can be <9>

R5C5 is the only square in row 5 that can be <9>

R2C6 is the only square in column 6 that can be <2>

R2C1 can only be <6>

R1C5 can only be <8>

R1C7 can only be <2>

R9C5 can only be <1>

R2C4 can only be <1>

R3C7 can only be <4>

R2C9 can only be <8>

R3C1 can only be <2>

R5C4 can only be <8>

R7C9 can only be <4>

R3C9 can only be <6>

R5C6 can only be <1>

R8C6 can only be <8>

R4C5 can only be <2>

R7C1 can only be <8>

R8C9 can only be <2>

R8C1 can only be <4>

R8C8 can only be <1>

R9C7 can only be <8>

R6C7 can only be <3>

R6C4 can only be <4>

R4C7 can only be <1>

R4C8 can only be <8>

R4C3 can only be <4>

R6C8 can only be <2>

R6C3 can only be <8>

R4C4 can only be <3>