Number 6 is the only value possible in cell (3,4).

For column 7, Number 7 is only possible in cell (7,9)

For column 8, Number 7 is only possible in cell (8,2)

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

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

For box 5, Number 1 is only possible in cell (5,6)

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

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

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

Number 1 is the only value possible in cell (7,4).

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

Number 9 is the only value possible in cell (8,4).

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

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

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

For row 2, number 9 is only possible in cell (1,2)

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

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

For row 9, number 6 is only possible in cell (1,9)

For row 7, number 6 is only possible in cell (9,7)

For column 1, Number 5 is only possible in cell (1,8)

For row 1, number 3 is only possible in cell (2,1)

For row 1, number 6 is only possible in cell (5,1)

For row 3, number 6 is only possible in cell (2,3)

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

For box 7, candidates for 1 are all in row 7, so you can remove candidates from other blocks.

For blocks 2 and 5, candidates for 7 are all in the same two columns (4 and 6)

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

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

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

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

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

Number 2 is the only value possible in cell (1,7).

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

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

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

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

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

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

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

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

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

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

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

Number 3 is the only value possible in cell (5,7).

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

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

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

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

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

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

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

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

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

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

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

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

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