Copyright © Kevin Stone

R1C2 is the only square in row 1 that can be <1>

R3C7 is the only square in row 3 that can be <2>

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

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

R4C2 is the only square in row 4 that can be <7>

R5C3 is the only square in row 5 that can be <1>

R6C4 is the only square in row 6 that can be <2>

R6C6 is the only square in row 6 that can be <7>

R6C8 is the only square in row 6 that can be <5>

R5C7 can only be <3>

R4C7 can only be <9>

R4C9 can only be <8>

R4C4 can only be <3>

R7C8 is the only square in row 7 that can be <2>

R8C4 is the only square in row 8 that can be <5>

R9C1 is the only square in row 9 that can be <1>

R8C9 is the only square in row 8 that can be <1>

R9C2 is the only square in row 9 that can be <2>

R9C3 is the only square in row 9 that can be <7>

R8C7 is the only square in row 8 that can be <7>

Squares R9C4 and R9C6 in row 9 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 row.

R9C8 - removing <9> from <369> leaving <36>

Intersection of row 1 with block 3. The values <34> only appears in one or more of squares R1C7, R1C8 and R1C9 of row 1. These squares are the ones that intersect with block 3. Thus, the other (non-intersecting) squares of block 3 cannot contain these values.

R2C8 - removing <3> from <3689> leaving <689>

R2C9 - removing <3> from <379> leaving <79>

R3C9 - removing <4> from <479> leaving <79>

Squares R2C9 and R3C9 in column 9 form a simple locked pair. These 2 squares both contain the 2 possibilities <79>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C9 - removing <79> from <3479> leaving <34>

R7C9 - removing <9> from <349> leaving <34>

R1C5 is the only square in row 1 that can be <7>

R7C3 is the only square in row 7 that can be <9>

R8C2 can only be <3>

R8C3 can only be <4>

R8C1 can only be <6>

R8C8 can only be <9>

R7C1 can only be <8>

R6C1 can only be <3>

R6C3 can only be <8>

R2C1 can only be <7>

R3C3 can only be <5>

R2C9 can only be <9>

R3C1 can only be <4>

R2C2 can only be <8>

R3C9 can only be <7>

R3C5 can only be <8>

R2C3 can only be <3>

R3C2 can only be <9>

R5C5 can only be <5>

R1C4 can only be <9>

R5C6 can only be <4>

R5C4 can only be <8>

R9C6 can only be <9>

R9C4 can only be <4>

R1C6 can only be <5>

R1C7 can only be <4>

R1C9 can only be <3>

R7C7 can only be <6>

R1C8 can only be <8>

R7C9 can only be <4>

R2C8 can only be <6>

R2C7 can only be <5>

R9C8 can only be <3>

R7C5 can only be <3>

R9C5 can only be <6>