For row 9, number 1 is only possible in cell (3,9)

For row 9, number 4 is only possible in cell (2,9)

For row 2, number 9 is only possible in cell (6,2)

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

Number 7 is the only value possible in cell (4,8).

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

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

For row 3, number 9 is only possible in cell (8,3)

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

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

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

For row 3, number 6 is only possible in cell (7,3)

For row 3, number 1 is only possible in cell (4,3)

For box 8, candidates for 6 are all in column 6, 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 blocks 2 and 8, candidates for 5 are all in the same two columns (4 and 6)

Naked Pair for 3 and 8, can remove these as candidates from other cells.

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

For box 1, candidates for 8 are all in column 3, so you can remove candidates from other blocks.

Naked Pair for 4 and 6, can remove these as candidates from other cells.

Naked Pair for 5 and 9, can remove these as candidates from other cells.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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