For row 5, number 8 is only possible in cell (3,5)

For row 2, number 8 is only possible in cell (7,2)

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

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

For row 7, number 8 is only possible in cell (5,7)

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

For column 3, Number 4 is only possible in cell (3,6)

For row 4, number 3 is only possible in cell (2,4)

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

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

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

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

For column 5, Number 6 is only possible in cell (5,4)

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

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

For box 1, candidates for 6 are all in row 1, so you can remove candidates from other blocks.

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

For box 7, candidates for 5 are all in row 9, so you can remove candidates from other blocks.

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

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

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

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

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

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

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

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

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

Number 9 is the only value possible in cell (7,3).

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

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

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

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

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

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

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

Number 5 is the only value possible in cell (9,7).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 3 is the only value possible in cell (7,9).