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

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

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

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

For row 9, number 3 is only possible in cell (7,9)

For column 5, Number 2 is only possible in cell (5,3)

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

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

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

For row 5, number 4 is only possible in cell (7,5)

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

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

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

For box 9, Number 2 is only possible in cell (8,8)

For box 1, candidates for 7 are all in row 3, so you can remove candidates from other blocks.

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

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

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

Number 7 is the only value possible in cell (5,1).

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

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

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

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

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

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

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

For column 3, Number 6 is only possible in cell (3,2)

Naked Pair for 2 and 8, can remove these as candidates from other cells.

Hidden Pair for 2 and 3, can remove other candidates from these cells.

Swordfish in rows for 8.

Either candidate for cell (7,4) forces 8 into cell (8,9).

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

Number 6 is the only value possible in cell (7,3).

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

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

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

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

Number 1 is the only value possible in cell (9,4).

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

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

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

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

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

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

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

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

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

Number 5 is the only value possible in cell (2,7).

Number 7 is the only value possible in cell (2,5).

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

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

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

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

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

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

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