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

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

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

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

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

Number 4 is the only value possible in cell (8,5).

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

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

For row 6, number 8 is only possible in cell (1,6)

For row 7, number 9 is only possible in cell (5,7)

For column 1, Number 3 is only possible in cell (1,8)

For row 6, number 5 is only possible in cell (4,6)

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

For row 4, number 7 is only possible in cell (3,4)

For box 5, candidates for 2 are all in column 6, so you can remove candidates from other blocks.

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

Naked Pair for 6 and 7, can remove these as candidates from other cells.

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

Naked Pair for 6 and 7, can remove these as candidates from other cells.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 7 is the only value possible in cell (5,2).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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