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

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

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

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

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

For column 4, Number 9 is only possible in cell (4,2)

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

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

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

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

For column 8, Number 9 is only possible in cell (8,3)

For row 1, number 9 is only possible in cell (3,1)

For row 1, number 4 is only possible in cell (6,1)

For row 6, number 4 is only possible in cell (9,6)

For column 3, Number 4 is only possible in cell (3,2)

For row 1, number 3 is only possible in cell (5,1)

For column 3, Number 5 is only possible in cell (3,9)

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

For box 1, candidates for 2 are all in row 2, so you can remove candidates from other blocks.

For box 8, candidates for 2 are all in column 5, so you can remove candidates from other blocks.

For box 3, candidates for 7 are all in row 2, so you can remove candidates from other blocks.

For box 3, candidates for 5 are all in row 2, so you can remove candidates from other blocks.

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

For blocks 2 and 5, candidates for 5 are all in the same two columns (5 and 6)

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

For column 8, Number 1 is only possible in cell (8,5)

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

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

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

Either candidate for cell (6,8) forces 4 into cell (2,8).

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

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

Either candidate for cell (2,7) forces 5 into cell (5,6).

Number 1 is the only value possible in cell (5,3).

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

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

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

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

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

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

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

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

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

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

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

Number 9 is the only value possible in cell (7,8).

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

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

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

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

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

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

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

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

Number 5 is the only value possible in cell (8,7).

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

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

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

Number 7 is the only value possible in cell (9,8).

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

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

Number 8 is the only value possible in cell (7,9).

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