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

For box 9, Number 7 is only possible in cell (7,8)

For column 4, Number 2 is only possible in cell (4,8)

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

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

Naked Pair for 2 and 3, can remove these as candidates from other cells.

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

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

For row 2, number 6 is only possible in cell (4,2)

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

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

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

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

Number 5 is the only value possible in cell (1,8).

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

Number 4 is the only value possible in cell (6,8).

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

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

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

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

Number 8 is the only value possible in cell (5,7).

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

For column 1, Number 7 is only possible in cell (1,7)

Number 6 is the only value possible in cell (3,7).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 8 is the only value possible in cell (3,2).

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

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

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

Number 1 is the only value possible in cell (8,3).

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

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

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

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

Number 7 is the only value possible in cell (3,6).

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

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

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

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

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

Number 1 is the only value possible in cell (7,9).

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