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

For column 1, Number 5 is only possible in cell (1,2)

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

For row 5, number 1 is only possible in cell (2,5)

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

For column 1, Number 4 is only possible in cell (1,9)

For column 8, Number 4 is only possible in cell (8,1)

For column 8, Number 5 is only possible in cell (8,6)

For box 5, candidates for 3 are all in column 5, so you can remove candidates from other blocks.

Hidden Pair for 3 and 6, can remove other candidates from these cells.

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

For box 1, Number 7 is only possible in cell (1,3)

Either candidate for cell (8,4) forces 2 into cell (1,4).

Number 9 is the only value possible in cell (1,7).

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

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

Naked Pair for 3 and 6, can remove these as candidates from other cells.

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

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

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

For row 9, number 6 is only possible in cell (2,9)

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

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

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

Either candidate for cell (8,4) forces 9 into cell (2,6).

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

Either candidate for cell (5,1) forces 7 into cell (9,6).

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

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

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

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

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

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

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

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

Number 9 is the only value possible in cell (8,3).

Number 3 is the only value possible in cell (8,4).

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

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

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

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

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

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

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

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

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

Number 3 is the only value possible in cell (9,8).

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

Number 2 is the only value possible in cell (6,3).

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

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

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

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

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

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

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

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