For row 4, number 8 is only possible in cell (1,4)

For row 9, number 8 is only possible in cell (4,9)

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

For column 3, Number 2 is only possible in cell (3,7)

For column 1, Number 3 is only possible in cell (1,2)

For box 7, Number 4 is only possible in cell (2,9)

For column 3, Number 5 is only possible in cell (3,5)

For column 3, Number 4 is only possible in cell (3,6)

For box 6, candidates for 7 are all in row 5, so you can remove candidates from other blocks.

For box 8, candidates for 3 are all in row 7, so you can remove candidates from other blocks.

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

Candidates for 6 in boxes 4 and 7 force the candidates in box 1 to be in the remaining line.

Hidden Pair for 7 and 9, can remove other candidates from these cells.

Hidden Pair for 4 and 9, can remove other candidates from these cells.

Hidden Pair for 2 and 4, can remove other candidates from these cells.

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

For row 4, number 6 is only possible in cell (8,4)

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

Number 8 is the only value possible in cell (9,1).

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

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

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

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

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

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

Number 9 is the only value possible in cell (8,1).

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

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

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

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

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

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

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

Number 9 is the only value possible in cell (1,5).

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

Number 7 is the only value possible in cell (5,6).

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

Number 7 is the only value possible in cell (4,3).

Number 9 is the only value possible in cell (4,6).

Number 3 is the only value possible in cell (4,7).

Number 6 is the only value possible in cell (5,7).

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

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

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

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

Number 2 is the only value possible in cell (6,4).

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

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

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

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

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

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

Number 1 is the only value possible in cell (6,7).

Number 5 is the only value possible in cell (1,7).

Number 6 is the only value possible in cell (1,8).

Number 3 is the only value possible in cell (9,8).

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

Number 2 is the only value possible in cell (7,9).

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