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

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

For column 3, Number 4 is only possible in cell (3,8)

For column 5, Number 4 is only possible in cell (5,1)

For column 5, Number 3 is only possible in cell (5,6)

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

For row 2, number 5 is only possible in cell (4,2)

For row 4, number 5 is only possible in cell (8,4)

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

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

For row 9, number 5 is only possible in cell (5,9)

For box 1, candidates for 6 are all in row 2, so you can remove candidates from other blocks.

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

For row 3, number 6 is only possible in cell (4,3)

For box 7, candidates for 2 are all in row 7, so you can remove candidates from other blocks.

For column 7, Number 2 is only possible in cell (7,2)

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

For row 7, number 2 is only possible in cell (3,7)

For row 1, number 8 is only possible in cell (2,1)

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

Number 6 is the only value possible in cell (5,4).

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

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

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

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

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

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

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

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

For column 2, Number 3 is only possible in cell (2,2)

For row 3, number 7 is only possible in cell (9,3)

For row 3, number 8 is only possible in cell (7,3)

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

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

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

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

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

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

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

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

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

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

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

Number 2 is the only value possible in cell (8,6).

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

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

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

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

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

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

Number 6 is the only value possible in cell (2,8).

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

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

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

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

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

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

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