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

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

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

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

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

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

Number 9 is the only value possible in cell (1,8).

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

For row 6, number 5 is only possible in cell (4,6)

For column 9, Number 5 is only possible in cell (9,9)

For box 9, candidates for 4 are all in column 7, so you can remove candidates from other blocks.

For box 6, candidates for 8 are all in column 9, so you can remove candidates from other blocks.

Hidden Pair for 1 and 2, can remove other candidates from these cells.

For column 6, Number 7 is only possible in cell (6,4)

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

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

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

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

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

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

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

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

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

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

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

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

Number 1 is the only value possible in cell (3,2).

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

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

Number 9 is the only value possible in cell (7,2).

Number 7 is the only value possible in cell (8,2).

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

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

Number 1 is the only value possible in cell (6,3).

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

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

Number 8 is the only value possible in cell (9,6).

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

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

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

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

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

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

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

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

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

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

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

Number 6 is the only value possible in cell (8,7).

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

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

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

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

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

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

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

Number 8 is the only value possible in cell (6,9).

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