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

For column 2, Number 8 is only possible in cell (2,4)

For row 2, number 3 is only possible in cell (7,2)

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

For row 2, number 4 is only possible in cell (3,2)

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

For row 3, number 7 is only possible in cell (5,3)

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

For row 8, number 7 is only possible in cell (3,8)

For row 4, number 7 is only possible in cell (1,4)

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

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

For column 1, Number 5 is only possible in cell (1,3)

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

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

X-Wing in rows for 1.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 9 is the only value possible in cell (3,7).

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

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

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

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

Number 2 is the only value possible in cell (7,1).

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

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

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

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

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

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

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

Number 8 is the only value possible in cell (7,6).

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

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

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

Number 8 is the only value possible in cell (9,7).

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

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

Number 1 is the only value possible in cell (3,9).

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

Number 6 is the only value possible in cell (5,9).

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