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

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

Number 9 is the only value possible in cell (7,6).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

For row 9, number 6 is only possible in cell (8,9)

For row 2, number 5 is only possible in cell (4,2)

For column 4, Number 8 is only possible in cell (4,6)

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

For column 5, Number 8 is only possible in cell (5,7)

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

For box 3, candidates for 4 are all in column 8, so you can remove candidates from other blocks.

Either candidate for cell (5,9) forces 4 into cell (2,9).

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

For column 8, Number 1 is only possible in cell (8,7)

For column 6, Number 1 is only possible in cell (6,5)

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

Either candidate for cell (8,8) forces 1 into cell (4,3).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 9 is the only value possible in cell (6,7).

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

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