Copyright © Kevin Stone

R8C9 can only be <8>

R9C4 can only be <2>

R8C8 can only be <9>

R8C7 can only be <5>

R6C5 is the only square in row 6 that can be <9>

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

R1C4 is the only square in row 1 that can be <7>

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

R7C5 is the only square in column 5 that can be <1>

R3C5 is the only square in column 5 that can be <2>

R5C6 is the only square in column 6 that can be <4>

R4C8 is the only square in column 8 that can be <4>

R4C3 is the only square in row 4 that can be <1>

R5C8 is the only square in row 5 that can be <1>

R8C1 is the only square in row 8 that can be <1>

R6C8 is the only square in column 8 that can be <8>

Squares R6C3 and R8C3 in column 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <23>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R2C3 - removing <3> from <357> leaving <57>

R3C3 - removing <3> from <378> leaving <78>

R7C3 - removing <3> from <358> leaving <58>

Squares R1C8 and R2C8 in block 3 form a simple locked pair. These 2 squares both contain the 2 possibilities <36>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R2C7 - removing <36> from <2369> leaving <29>

R2C9 - removing <6> from <267> leaving <27>

R3C7 - removing <36> from <3469> leaving <49>

R3C9 - removing <6> from <467> leaving <47>

Squares R8C2 and R8C3 in block 7 form a simple locked pair. These 2 squares both contain the 2 possibilities <23>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the block.

R7C1 - removing <3> from <358> leaving <58>

Squares R7C1 and R7C3 in row 7 form a simple locked pair. These 2 squares both contain the 2 possibilities <58>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R7C6 - removing <58> from <3589> leaving <39>

R9C6 is the only square in column 6 that can be <8>

R9C5 can only be <5>

R1C6 is the only square in column 6 that can be <5>

R1C2 is the only square in row 1 that can be <9>

R2C7 is the only square in row 2 that can be <9>

R3C7 can only be <4>

R3C9 can only be <7>

R7C7 can only be <6>

R3C3 can only be <8>

R2C9 can only be <2>

R7C9 can only be <4>

R4C7 can only be <3>

R5C9 can only be <6>

R7C3 can only be <5>

R6C7 can only be <2>

R5C4 can only be <3>

R6C3 can only be <3>

R7C1 can only be <8>

R2C3 can only be <7>

R5C5 can only be <8>

R7C4 can only be <9>

R5C1 can only be <5>

R4C5 can only be <6>

R6C2 can only be <6>

R8C3 can only be <2>

R7C6 can only be <3>

R3C4 can only be <6>

R3C6 can only be <9>

R8C2 can only be <3>

R3C1 can only be <3>

R1C5 can only be <3>

R4C2 can only be <8>

R5C2 can only be <2>

R2C2 can only be <5>

R1C8 can only be <6>

R2C8 can only be <3>

R2C1 can only be <6>