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

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

For row 9, number 6 is only possible in cell (1,9)

For column 1, Number 5 is only possible in cell (1,7)

For column 7, Number 5 is only possible in cell (7,2)

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

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

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

Naked Pair for 1 and 7, can remove these as candidates from other cells.

Naked Pair for 7 and 8, can remove these as candidates from other cells.

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

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

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

For row 4, number 9 is only possible in cell (8,4)

For row 7, number 3 is only possible in cell (4,7)

For column 1, Number 3 is only possible in cell (1,6)

Candidates for 7 in boxes 2 and 8 force the candidates in box 5 to be in the remaining line.

Candidates for 8 in boxes 2 and 8 force the candidates in box 5 to be in the remaining line.

Hidden Pair for 7 and 8, can remove other candidates from these cells.

For box 7, candidates for 2 are all in row 8, so you can remove candidates from other blocks.

Either candidate for cell (6,7) forces 8 into cell (4,3).

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

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

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

Either candidate for cell (2,3) forces 9 into cell (4,8).

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

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

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

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

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

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

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

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

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

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

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

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

Number 4 is the only value possible in cell (9,1).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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