For row 9, number 2 is only possible in cell (6,9)

For column 5, Number 7 is only possible in cell (5,5)

For column 9, Number 7 is only possible in cell (9,6)

For row 5, number 8 is only possible in cell (7,5)

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

For box 5, Number 1 is only possible in cell (4,6)

For column 6, Number 4 is only possible in cell (6,8)

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

For box 6, candidates for 9 are all in column 7, so you can remove candidates from other blocks.

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

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

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

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

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

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

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

For column 3, Number 4 is only possible in cell (3,7)

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

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

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

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

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

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

Number 5 is the only value possible in cell (6,4).

For box 4, candidates for 9 are all in column 3, so you can remove candidates from other blocks.

Hidden Pair for 8 and 9, can remove other candidates from these cells.

X-Wing in rows for 5.

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

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

Either candidate for cell (1,1) forces 9 into cell (3,6).

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

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

For column 7, Number 3 is only possible in cell (7,9)

Either candidate for cell (3,1) forces 6 into cell (7,7).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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