Puzzle Copyright © Kevin Stone

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

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

R6C8 is the only square in row 6 that can be <1>

R5C5 is the only square in row 5 that can be <1>

R5C6 is the only square in row 5 that can be <2>

R5C4 is the only square in row 5 that can be <9>

R5C2 is the only square in row 5 that can be <5>

R2C1 is the only square in row 2 that can be <5>

R5C3 is the only square in row 5 that can be <8>

R6C4 is the only square in row 6 that can be <7>

R2C4 can only be <4>

R4C8 is the only square in row 4 that can be <7>

R9C8 can only be <8>

R7C8 is the only square in row 7 that can be <5>

R2C7 is the only square in column 7 that can be <8>

Squares R7C3 and R7C7 in row 7 form a simple locked pair. These 2 squares both contain the 2 possibilities <46>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R7C2 - removing <46> from <2468> leaving <28>

Squares R4C2 and R6C2 in column 2 form a simple locked pair. These 2 squares both contain the 2 possibilities <34>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the column.

R1C2 - removing <3> from <389> leaving <89>

R2C2 - removing <3> from <13679> leaving <1679>

R3C2 - removing <3> from <13679> leaving <1679>

R8C2 - removing <4> from <1246789> leaving <126789>

Squares R1C1 and R1C2 in row 1 form a simple locked pair. These 2 squares both contain the 2 possibilities <89>. Since each of the squares must contain one of the possibilities, they can be eliminated from the other squares in the row.

R1C8 - removing <9> from <349> leaving <34>

R3C8 is the only square in column 8 that can be <9>

R8C8 is the only square in column 8 that can be <6>

R7C7 can only be <4>

R7C3 can only be <6>

R5C7 can only be <3>

R5C8 can only be <4>

R8C7 can only be <1>

R1C8 can only be <3>

R3C7 can only be <6>

R9C9 can only be <7>

R8C9 can only be <3>

R1C9 can only be <4>

R2C9 can only be <1>

R2C2 is the only square in row 2 that can be <6>

R3C2 is the only square in row 3 that can be <1>

R9C2 can only be <9>

R9C1 can only be <1>

R1C2 can only be <8>

R8C1 can only be <8>

R1C1 can only be <9>

R7C2 can only be <2>

R7C5 can only be <8>

R8C2 can only be <7>

R4C5 can only be <3>

R8C4 can only be <5>

R8C3 can only be <4>

R8C6 can only be <9>

R4C4 can only be <8>

R8C5 can only be <2>

R2C6 can only be <3>

R2C3 can only be <7>

R6C6 can only be <4>

R3C5 can only be <7>

R3C3 can only be <3>

R2C5 can only be <9>

R4C2 can only be <4>

R6C2 can only be <3>

R4C6 can only be <5>