For row 6, number 7 is only possible in cell (8,6)

For row 2, number 7 is only possible in cell (9,2)

For row 8, number 7 is only possible in cell (2,8)

For row 9, number 7 is only possible in cell (4,9)

For column 7, Number 9 is only possible in cell (7,8)

For column 9, Number 8 is only possible in cell (9,4)

For column 7, Number 4 is only possible in cell (7,1)

For box 7, candidates for 4 are all in column 1, so you can remove candidates from other blocks.

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

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

For row 4, number 1 is only possible in cell (2,4)

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

For row 5, number 1 is only possible in cell (6,5)

For row 9, number 1 is only possible in cell (8,9)

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

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

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

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

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

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

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

Number 4 is the only value possible in cell (2,5).

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

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

Number 5 is the only value possible in cell (3,4).

Number 4 is the only value possible in cell (1,7).

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

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

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

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

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

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

Number 8 is the only value possible in cell (1,2).

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

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

Number 8 is the only value possible in cell (4,1).

Number 9 is the only value possible in cell (4,2).

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

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

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

Number 3 is the only value possible in cell (5,2).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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