For row 8, number 9 is only possible in cell (1,8)

For column 9, Number 4 is only possible in cell (9,7)

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

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

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

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

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

For column 2, Number 6 is only possible in cell (2,9)

For row 8, number 3 is only possible in cell (5,8)

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

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

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

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

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

For row 4, number 2 is only possible in cell (1,4)

For box 9, Number 2 is only possible in cell (7,7)

For row 3, number 2 is only possible in cell (9,3)

For box 8, candidates for 8 are all in column 4, so you can remove candidates from other blocks.

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

For box 9, candidates for 8 are all in column 8, so you can remove candidates from other blocks.

For row 4, number 8 is only possible in cell (9,4)

For box 7, candidates for 5 are all in row 9, so you can remove candidates from other blocks.

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

Naked Triple for 2, 5 and 9, can remove these as candidates from other cells.

Either candidate for cell (4,7) forces 5 into cell (8,4).

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

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

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

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

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

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

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

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

Number 1 is the only value possible in cell (5,2).

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

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

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

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

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

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

Number 6 is the only value possible in cell (4,7).

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

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

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

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

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

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

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

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

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

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

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

Number 8 is the only value possible in cell (7,3).

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

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

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

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

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