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

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

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

For column 1, Number 5 is only possible in cell (1,4)

For row 3, number 1 is only possible in cell (7,3)

For row 3, number 4 is only possible in cell (6,3)

For row 2, number 4 is only possible in cell (8,2)

For row 5, number 4 is only possible in cell (3,5)

For box 4, candidates for 1 are all in column 2, so you can remove candidates from other blocks.

For box 9, candidates for 3 are all in row 8, so you can remove candidates from other blocks.

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

For box 9, candidates for 6 are all in row 7, so you can remove candidates from other blocks.

Candidates for 1 in boxes 4 and 6 force the candidates in box 5 to be in the remaining line.

Naked Pair for 1 and 6, can remove these as candidates from other cells.

Naked Pair for 1 and 6, can remove these as candidates from other cells.

Naked Pair for 3 and 9, can remove these as candidates from other cells.

Hidden Pair for 1 and 2, can remove other candidates from these cells.

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

For row 8, number 4 is only possible in cell (2,8)

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

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

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

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

For row 7, number 6 is only possible in cell (8,7)

For row 8, number 2 is only possible in cell (5,8)

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

Number 9 is the only value possible in cell (4,5).

Number 3 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 (3,4).

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

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

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

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

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

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

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

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

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

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

Number 3 is the only value possible in cell (6,1).

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

Number 2 is the only value possible in cell (7,1).

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

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

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

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

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

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

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

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

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

Number 7 is the only value possible in cell (3,2).

Number 2 is the only value possible in cell (3,7).

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

Number 7 is the only value possible in cell (9,8).

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

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

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

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

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

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