Copyright © Kevin Stone

R6C3 can only be <6>

R7C4 can only be <1>

R4C3 can only be <2>

R9C3 can only be <7>

R7C6 can only be <6>

R7C1 can only be <3>

R7C9 can only be <9>

R1C3 can only be <3>

R3C1 can only be <4>

R3C9 is the only square in row 3 that can be <3>

R8C9 is the only square in row 8 that can be <7>

R9C2 is the only square in row 9 that can be <4>

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

R2C2 is the only square in column 2 that can be <7>

R1C2 is the only square in column 2 that can be <8>

Squares R1C1 and R2C1 in column 1 form a simple locked pair. These 2 squares both contain the 2 possibilities <29>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R5C1 - removing <9> from <159> leaving <15>

Squares R3C4 and R3C6 in block 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <78>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R2C4 - removing <8> from <248> leaving <24>

R2C6 - removing <8> from <2489> leaving <249>

Squares R1C8 and R1C9 in block 3 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.

R2C8 - removing <4> from <468> leaving <68>

R2C9 - removing <4> from <468> leaving <68>

R1C9 is the only square in column 9 that can be <4>

R1C8 can only be <1>

Intersection of row 5 with block 5. The values <29> only appears in one or more of squares R5C4, R5C5 and R5C6 of row 5. These squares are the ones that intersect with block 5. Thus, the other (non-intersecting) squares of block 5 cannot contain these values.

R4C5 - removing <9> from <69> leaving <6>

R4C6 - removing <9> from <1479> leaving <147>

R6C5 - removing <9> from <589> leaving <58>

R6C6 - removing <9> from <1489> leaving <148>

R5C9 is the only square in row 5 that can be <6>

R2C9 can only be <8>

R2C8 can only be <6>

R9C9 can only be <1>

R9C7 can only be <6>

R9C1 can only be <5>

R5C1 can only be <1>

R8C2 can only be <1>

R8C1 can only be <6>

R4C2 can only be <9>

R4C7 can only be <1>

R6C2 can only be <5>

R6C7 can only be <9>

R6C5 can only be <8>

R9C5 can only be <2>

R9C8 can only be <8>

R1C5 can only be <9>

R8C6 can only be <8>

R8C8 can only be <2>

R1C1 can only be <2>

R5C5 can only be <5>

R5C4 can only be <2>

R8C4 can only be <5>

R3C6 can only be <7>

R2C1 can only be <9>

R3C4 can only be <8>

R4C6 can only be <4>

R4C8 can only be <3>

R2C6 can only be <2>

R6C6 can only be <1>

R6C4 can only be <3>

R4C4 can only be <7>

R6C8 can only be <4>

R5C6 can only be <9>

R2C4 can only be <4>