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

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

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

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

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

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

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

Number 5 is the only value possible in cell (4,7).

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

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

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

For column 3, Number 4 is only possible in cell (3,9)

For column 1, Number 9 is only possible in cell (1,1)

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

For box 8, candidates for 9 are all in row 9, so you can remove candidates from other blocks.

For box 1, candidates for 2 are all in row 1, so you can remove candidates from other blocks.

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

For box 1, candidates for 4 are all in row 3, so you can remove candidates from other blocks.

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

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

For box 8, candidates for 7 are all in row 9, so you can remove candidates from other blocks.

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

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

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

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

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

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

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

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

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

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

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

Number 5 is the only value possible in cell (2,4).

Number 2 is the only value possible in cell (1,4).

Number 7 is the only value possible in cell (5,4).

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

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

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

Number 4 is the only value possible in cell (2,3).

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

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

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

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

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

Number 9 is the only value possible in cell (8,2).

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

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

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

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

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

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

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

Number 5 is the only value possible in cell (1,9).

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

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

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

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

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