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

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

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

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

For row 9, number 5 is only possible in cell (8,9)

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

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

Number 5 is the only value possible in cell (1,4).

Number 9 is the only value possible in cell (8,6).

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

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

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

For row 6, number 8 is only possible in cell (2,6)

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

For box 3, candidates for 7 are all in row 2, so you can remove candidates from other blocks.

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

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

Naked Pair for 1 and 6, can remove these as candidates from other cells.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 8 is the only value possible in cell (3,9).

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

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

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