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

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

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

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

For row 2, number 4 is only possible in cell (8,2)

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

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

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

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

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

For box 6, candidates for 1 are all in column 8, so you can remove candidates from other blocks.

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

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

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

For column 7, Number 3 is only possible in cell (7,5)

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

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

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

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

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

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

Number 5 is the only value possible in cell (1,7).

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

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

Number 8 is the only value possible in cell (5,3).

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

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

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

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

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

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

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

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

Number 5 is the only value possible in cell (6,1).

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

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

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

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

Number 8 is the only value possible in cell (2,4).

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

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

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

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

Number 5 is the only value possible in cell (8,6).

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

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

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

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

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

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

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

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

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

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

Number 2 is the only value possible in cell (7,9).