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

For row 3, number 8 is only possible in cell (1,3)

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

Number 8 is the only value possible in cell (3,7).

For column 5, Number 5 is only possible in cell (5,4)

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

For row 1, number 1 is only possible in cell (3,1)

For row 8, number 1 is only possible in cell (7,8)

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

Hidden Pair for 3 and 5, can remove other candidates from these cells.

Hidden Pair for 1 and 8, can remove other candidates from these cells.

Naked Pair for 1 and 8, can remove these as candidates from other cells.

X-Wing in rows for 4.

X-Wing in rows for 7.

Hidden Pair for 4 and 7, can remove other candidates from these cells.

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

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

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

For blocks 3 and 6, candidates for 2 are all in the same two columns (7 and 8)

Naked Pair for 6 and 7, can remove these as candidates from other cells.

Hidden Pair for 1 and 6, can remove other candidates from these cells.

Either candidate for cell (2,6) forces 6 into cell (6,4).

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

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

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

Number 3 is the only value possible in cell (8,1).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 3 is the only value possible in cell (5,8).

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

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

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

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

Number 5 is the only value possible in cell (7,9).

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