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

For row 9, number 5 is only possible in cell (8,9)

For row 1, number 8 is only possible in cell (5,1)

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

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

For row 8, number 4 is only possible in cell (6,8)

For row 8, number 2 is only possible in cell (9,8)

For row 3, number 1 is only possible in cell (4,3)

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

For box 3, candidates for 7 are all in row 1, so you can remove candidates from other blocks.

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

For box 1, candidates for 6 are all in row 3, so you can remove candidates from other blocks.

Candidates for 3 in boxes 2 and 3 force the candidates in box 1 to be in the remaining line.

Naked Pair for 3 and 7, can remove these as candidates from other cells.

Naked Pair for 2 and 6, can remove these as candidates from other cells.

For box 4, candidates for 2 are all in row 5, so you can remove candidates from other blocks.

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

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

For row 9, number 7 is only possible in cell (5,9)

For box 8, candidates for 3 are all in row 7, so you can remove candidates from other blocks.

For box 4, candidates for 7 are all in row 6, so you can remove candidates from other blocks.

Hidden Pair for 4 and 5, can remove other candidates from these cells.

For box 6, candidates for 3 are all in row 5, so you can remove candidates from other blocks.

For blocks 6 and 9, candidates for 3 are all in the same two columns (7 and 8)

Naked Triple for 3, 7 and 9, can remove these as candidates from other cells.

Either candidate for cell (9,4) forces 5 into cell (9,6).

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

For row 3, number 5 is only possible in cell (7,3)

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

Either candidate for cell (2,5) forces 9 into cell (2,1).

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

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

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

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

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

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

Number 9 is the only value possible in cell (8,3).

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

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

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

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

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

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

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

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

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

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

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

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

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

Number 6 is the only value possible in cell (1,7).

Number 4 is the only value possible in cell (3,7).

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

Number 7 is the only value possible in cell (1,2).

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

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

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

Number 9 is the only value possible in cell (3,6).

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

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

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

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

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

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

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

Number 8 is the only value possible in cell (3,9).