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

For row 8, number 1 is only possible in cell (3,8)

For row 2, number 6 is only possible in cell (7,2)

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

For row 8, number 6 is only possible in cell (5,8)

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

Number 3 is the only value possible in cell (6,7).

For row 7, number 6 is only possible in cell (3,7)

For row 8, number 5 is only possible in cell (9,8)

For column 4, Number 8 is only possible in cell (4,8)

For row 1, number 3 is only possible in cell (4,1)

For row 3, number 3 is only possible in cell (8,3)

For row 9, number 3 is only possible in cell (1,9)

For row 8, number 7 is only possible in cell (2,8)

For box 2, candidates for 7 are all in row 2, so you can remove candidates from other blocks.

For box 8, candidates for 9 are all in column 6, so you can remove candidates from other blocks.

For box 8, candidates for 2 are all in column 6, so you can remove candidates from other blocks.

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

For box 5, candidates for 2 are all in row 5, so you can remove candidates from other blocks.

Candidates for 9 in boxes 1 and 7 force the candidates in box 4 to be in the remaining line.

For row 6, number 9 is only possible in cell (8,6)

For row 6, number 2 is only possible in cell (9,6)

For row 1, number 2 is only possible in cell (7,1)

For column 7, Number 9 is only possible in cell (7,3)

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

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

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

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

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

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

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

Number 7 is the only value possible in cell (4,5).

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

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

Number 7 is the only value possible in cell (3,6).

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

Number 4 is the only value possible in cell (3,1).

Number 9 is the only value possible in cell (1,1).

Number 7 is the only value possible in cell (9,1).

Number 5 is the only value possible in cell (1,2).

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

Number 1 is the only value possible in cell (6,5).

Number 5 is the only value possible in cell (6,4).

Number 4 is the only value possible in cell (1,8).

Number 8 is the only value possible in cell (1,4).

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

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

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

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

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

Number 8 is the only value possible in cell (7,5).

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

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

Number 4 is the only value possible in cell (9,2).

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

Number 9 is the only value possible in cell (6,8).

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

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

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