For row 3, number 4 is only possible in cell (9,3)

For row 6, number 4 is only possible in cell (1,6)

For column 6, Number 4 is only possible in cell (6,9)

For row 9, number 3 is only possible in cell (5,9)

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

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

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

For row 7, number 1 is only possible in cell (5,7)

For row 8, number 4 is only possible in cell (7,8)

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

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

For column 8, Number 7 is only possible in cell (8,7)

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

For box 3, candidates for 6 are all in row 2, so you can remove candidates from other blocks.

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

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

For box 8, candidates for 6 are all in column 4, so you can remove candidates from other blocks.

For box 8, candidates for 2 are all in column 4, so you can remove candidates from other blocks.

X-Wing in rows for 9.

Number 6 is the only value possible in cell (3,1).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 9 is the only value possible in cell (6,4).

Number 8 is the only value possible in cell (7,4).

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

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

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

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

Number 3 is the only value possible in cell (6,5).

Number 9 is the only value possible in cell (8,5).

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

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

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

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

Number 7 is the only value possible in cell (1,8).

Number 2 is the only value possible in cell (3,8).

Number 6 is the only value possible in cell (4,8).

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

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