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

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

For row 1, number 2 is only possible in cell (3,1)

For row 1, number 4 is only possible in cell (2,1)

For row 9, number 4 is only possible in cell (7,9)

For row 3, number 4 is only possible in cell (9,3)

For row 9, number 3 is only possible in cell (2,9)

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

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

For column 3, Number 4 is only possible in cell (3,8)

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

For box 2, candidates for 1 are all in row 3, so you can remove candidates from other blocks.

For box 2, candidates for 8 are all in row 3, so you can remove candidates from other blocks.

For box 8, candidates for 6 are all in row 7, so you can remove candidates from other blocks.

For box 1, candidates for 5 are all in row 3, so you can remove candidates from other blocks.

For box 9, candidates for 5 are all in row 8, so you can remove candidates from other blocks.

For blocks 2 and 5, candidates for 1 are all in the same two columns (5 and 6)

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

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

Number 9 is the only value possible in cell (4,1).

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

Number 1 is the only value possible in cell (4,9).

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

Naked Pair for 6 and 8, can remove these as candidates from other cells.

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

Candidates for 8 in boxes 5 and 6 force the candidates in box 4 to be in the remaining line.

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

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

For row 6, number 5 is only possible in cell (7,6)

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

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

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

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

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

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

Number 9 is the only value possible in cell (7,4).

Number 3 is the only value possible in cell (9,4).

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

Number 3 is the only value possible in cell (6,5).

Number 8 is the only value possible in cell (9,5).

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

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

Number 6 is the only value possible in cell (3,2).

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

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

Number 8 is the only value possible in cell (3,4).

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

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

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

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

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

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

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

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

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

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

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

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

Number 2 is the only value possible in cell (4,7).

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

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

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

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

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