For row 7, number 8 is only possible in cell (4,7)

For row 8, number 7 is only possible in cell (4,8)

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

For row 1, number 7 is only possible in cell (5,1)

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

For row 4, number 7 is only possible in cell (2,4)

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

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

For box 2, candidates for 9 are all in column 6, so you can remove candidates from other blocks.

For box 3, candidates for 6 are all in column 9, so you can remove candidates from other blocks.

For box 5, candidates for 1 are all in column 5, so you can remove candidates from other blocks.

For box 9, candidates for 1 are all in row 9, so you can remove candidates from other blocks.

For column 4, Number 1 is only possible in cell (4,2)

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

For box 1, candidates for 4 are all in row 1, so you can remove candidates from other blocks.

For box 3, candidates for 4 are all in column 9, so you can remove candidates from other blocks.

Candidates for 5 in boxes 1 and 2 force the candidates in box 3 to be in the remaining line.

Naked Pair for 3 and 5, can remove these as candidates from other cells.

For row 8, number 5 is only possible in cell (1,8)

For box 4, candidates for 5 are all in column 3, so you can remove candidates from other blocks.

Candidates for 3 in boxes 4 and 7 force the candidates in box 1 to be in the remaining line.

Hidden Triple for 3, 4 and 8, can remove other candidates from these cells.

For column 3, Number 5 is only possible in cell (3,4)

For column 7, Number 5 is only possible in cell (7,9)

For row 7, number 5 is only possible in cell (5,7)

Number 4 is the only value possible in cell (5,3).

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

Number 5 is the only value possible in cell (8,2).

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

Number 6 is the only value possible in cell (9,3).

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

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

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

For row 7, number 9 is only possible in cell (1,7)

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

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

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

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

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

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

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

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

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

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

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

Number 2 is the only value possible in cell (5,6).

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

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

Number 5 is the only value possible in cell (9,6).

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

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

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

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

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

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

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

Number 2 is the only value possible in cell (4,3).

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

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

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

Number 3 is the only value possible in cell (1,9).

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

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

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

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