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

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

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

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

For row 2, number 3 is only possible in cell (1,2)

For row 6, number 2 is only possible in cell (7,6)

For column 7, Number 6 is only possible in cell (7,2)

For column 7, Number 1 is only possible in cell (7,9)

For row 3, number 6 is only possible in cell (3,3)

For box 1, Number 2 is only possible in cell (1,3)

For row 6, number 7 is only possible in cell (1,6)

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

For box 3, candidates for 9 are all in row 2, so you can remove candidates from other blocks.

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

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

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

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

For blocks 7 and 9, candidates for 5 are all in the same two rows (7 and 8)

Hidden Pair for 5 and 9, can remove other candidates from these cells.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 3 is the only value possible in cell (4,6).

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

Number 9 is the only value possible in cell (6,4).

Number 5 is the only value possible in cell (6,1).

Number 9 is the only value possible in cell (5,1).

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

Number 3 is the only value possible in cell (9,4).

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

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

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

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

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

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

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

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

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

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

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