For row 2, number 6 is only possible in cell (5,2)

For row 6, number 5 is only possible in cell (4,6)

For column 7, Number 5 is only possible in cell (7,1)

For row 3, number 5 is only possible in cell (2,3)

For column 9, Number 9 is only possible in cell (9,2)

For column 9, Number 3 is only possible in cell (9,6)

For column 9, Number 1 is only possible in cell (9,8)

For box 1, candidates for 1 are all in column 2, so you can remove candidates from other blocks.

For row 6, number 1 is only possible in cell (7,6)

Number 8 is the only value possible in cell (7,2).

Number 2 is the only value possible in cell (9,3).

Number 4 is the only value possible in cell (8,3).

Number 7 is the only value possible in cell (7,5).

Number 9 is the only value possible in cell (8,4).

Number 1 is the only value possible in cell (3,5).

Number 2 is the only value possible in cell (4,5).

Number 3 is the only value possible in cell (5,5).

Number 6 is the only value possible in cell (6,5).

Number 9 is the only value possible in cell (2,5).

Number 8 is the only value possible in cell (8,5).

For column 1, Number 9 is only possible in cell (1,8)

For row 4, number 6 is only possible in cell (1,4)

For row 4, number 1 is only possible in cell (4,4)

For row 9, number 3 is only possible in cell (6,9)

For row 9, number 9 is only possible in cell (4,9)

For row 1, number 9 is only possible in cell (6,1)

For row 1, number 2 is only possible in cell (5,1)

Number 7 is the only value possible in cell (5,9).

Number 4 is the only value possible in cell (5,8).

Number 8 is the only value possible in cell (4,7).

Number 4 is the only value possible in cell (4,1).

Number 7 is the only value possible in cell (4,2).

Number 8 is the only value possible in cell (6,3).

Number 7 is the only value possible in cell (1,3).

Number 4 is the only value possible in cell (1,7).

Number 3 is the only value possible in cell (1,2).

Number 8 is the only value possible in cell (1,1).

Number 1 is the only value possible in cell (2,1).

Number 3 is the only value possible in cell (8,1).

Number 4 is the only value possible in cell (2,2).

Number 1 is the only value possible in cell (8,2).

Number 7 is the only value possible in cell (2,6).

Number 4 is the only value possible in cell (3,4).

Number 7 is the only value possible in cell (6,4).

Number 4 is the only value possible in cell (6,6).

Number 6 is the only value possible in cell (9,7).

Number 2 is the only value possible in cell (2,7).

Number 7 is the only value possible in cell (8,7).

Number 8 is the only value possible in cell (2,8).

Number 2 is the only value possible in cell (6,8).

Number 5 is the only value possible in cell (8,8).

Number 7 is the only value possible in cell (3,8).

Number 6 is the only value possible in cell (2,9).

Number 5 is the only value possible in cell (3,9).

Number 2 is the only value possible in cell (8,9).

Number 8 is the only value possible in cell (9,9).