For row 9, number 6 is only possible in cell (5,9)

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

For row 1, number 4 is only possible in cell (5,1)

For row 2, number 4 is only possible in cell (9,2)

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

For box 8, candidates for 7 are all in row 8, so you can remove candidates from other blocks.

For box 4, candidates for 6 are all in row 4, so you can remove candidates from other blocks.

Candidates for 3 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.

Hidden Pair for 5 and 6, can remove other candidates from these cells.

Candidates for 3 in boxes 4 and 6 force the candidates in box 5 to be in the remaining line.

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

Number 1 is the only value possible in cell (6,9).

Number 3 is the only value possible in cell (6,4).

Number 2 is the only value possible in cell (6,1).

Number 8 is the only value possible in cell (7,1).

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

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

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

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

Number 1 is the only value possible in cell (4,2).

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

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

Number 8 is the only value possible in cell (5,3).

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

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

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

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

Number 3 is the only value possible in cell (5,8).

Number 5 is the only value possible in cell (6,8).

Number 6 is the only value possible in cell (7,8).

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

Number 9 is the only value possible in cell (1,2).

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

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

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

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

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

Number 2 is the only value possible in cell (3,5).

Number 4 is the only value possible in cell (1,5).

Number 3 is the only value possible in cell (2,5).

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

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

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

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

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

Number 5 is the only value possible in cell (3,7).

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

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

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

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

Number 6 is the only value possible in cell (1,4).

Number 8 is the only value possible in cell (1,7).

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

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

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

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

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

Number 4 is the only value possible in cell (2,8).

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