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

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

For row 7, number 2 is only possible in cell (9,7)

For row 1, number 2 is only possible in cell (7,1)

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

For row 6, number 7 is only possible in cell (3,6)

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

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

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

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

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

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

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

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

For row 5, number 6 is only possible in cell (8,5)

For column 3, Number 6 is only possible in cell (3,1)

For row 1, number 4 is only possible in cell (9,1)

For row 3, number 4 is only possible in cell (1,3)

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

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

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

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

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

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

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

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

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

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

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

Number 8 is the only value possible in cell (2,5).

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

Candidates for 1 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 4 is the only value possible in cell (3,8).

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

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