For row 4, number 8 is only possible in cell (1,4)

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

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

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

For row 3, number 6 is only possible in cell (5,3)

For column 3, Number 7 is only possible in cell (3,2)

For row 2, number 3 is only possible in cell (5,2)

For row 2, number 5 is only possible in cell (8,2)

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

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

For row 8, number 5 is only possible in cell (2,8)

For column 2, Number 3 is only possible in cell (2,5)

For column 9, Number 1 is only possible in cell (9,6)

For column 9, Number 6 is only possible in cell (9,1)

For box 3, Number 7 is only possible in cell (8,1)

For column 6, Number 7 is only possible in cell (6,3)

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

For box 2, candidates for 9 are all in column 6, so you can remove candidates from other blocks.

For row 7, number 9 is only possible in cell (4,7)

Candidates for 2 in boxes 5 and 6 force the candidates in box 4 to be in the remaining line.

Naked Pair for 2 and 4, can remove these as candidates from other cells.

For box 8, candidates for 4 are all in row 7, so you can remove candidates from other blocks.

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

Either candidate for cell (4,3) forces 3 into cell (7,6).

For row 8, number 3 is only possible in cell (4,8)

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

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

For row 9, number 3 is only possible in cell (8,9)

Either candidate for cell (1,2) forces 2 into cell (4,3).

Number 4 is the only value possible in cell (7,3).

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

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

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

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

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

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

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

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

Number 2 is the only value possible in cell (6,7).

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

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

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

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

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

Either candidate for cell (2,1) forces 9 into cell (1,8).

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

Number 9 is the only value possible in cell (7,1).

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

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

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

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

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

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

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

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