For column 4, Number 9 is only possible in cell (4,2)

For row 7, number 5 is only possible in cell (4,7)

For row 4, number 7 is only possible in cell (1,4)

For row 2, number 7 is only possible in cell (8,2)

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

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

For column 2, Number 9 is only possible in cell (2,8)

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

For row 8, number 7 is only possible in cell (9,8)

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

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

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

For row 9, number 6 is only possible in cell (3,9)

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

For row 1, number 3 is only possible in cell (6,1)

Number 2 is the only value possible in cell (6,4).

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

For box 2, Number 2 is only possible in cell (5,2)

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

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

For box 5, candidates for 4 are all in column 4, so you can remove candidates from other blocks.

Candidates for 5 in boxes 1 and 2 force the candidates in box 3 to be in the remaining line.

Naked Pair for 1 and 2, can remove these as candidates from other cells.

For column 7, Number 2 is only possible in cell (7,1)

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

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

Number 4 is the only value possible in cell (9,3).

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

Number 5 is the only value possible in cell (6,3).

Number 4 is the only value possible in cell (6,2).

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

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

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

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

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

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

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

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

Number 5 is the only value possible in cell (3,2).

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

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

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

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

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

Number 5 is the only value possible in cell (7,6).

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

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

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

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

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

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

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

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

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

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

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

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