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

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

Number 7 is the only value possible in cell (6,9).

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

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

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

Number 8 is the only value possible in cell (5,4).

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

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

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

Number 2 is the only value possible in cell (6,1).

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

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

Number 5 is the only value possible in cell (4,8).

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

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

For row 2, number 7 is only possible in cell (1,2)

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

For row 5, number 6 is only possible in cell (1,5)

For column 9, Number 6 is only possible in cell (9,8)

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

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

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

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

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

Hidden Pair for 6 and 9, can remove other candidates from these cells.

X-Wing in rows for 1.

X-Wing in rows for 4.

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

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

Number 6 is the only value possible in cell (8,3).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 3 is the only value possible in cell (2,7).

Number 2 is the only value possible in cell (3,7).

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

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

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

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

Number 2 is the only value possible in cell (8,9).

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