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

Number 1 is the only value possible in cell (7,3).

Number 2 is the only value possible in cell (9,8).

For row 1, number 8 is only possible in cell (4,1)

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

For row 3, number 5 is only possible in cell (8,3)

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

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

For row 9, number 5 is only possible in cell (3,9)

For row 9, number 8 is only possible in cell (7,9)

For row 8, number 8 is only possible in cell (3,8)

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

For column 8, Number 1 is only possible in cell (8,6)

For row 8, number 3 is only possible in cell (2,8)

For row 8, number 1 is only possible in cell (6,8)

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

For row 7, number 1 is only possible in cell (2,7)

For row 3, number 3 is only possible in cell (6,3)

For column 1, Number 3 is only possible in cell (1,4)

For row 6, number 3 is only possible in cell (4,6)

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

For box 9, candidates for 4 are all in column 8, so you can remove candidates from other blocks.

For box 3, candidates for 4 are all in column 7, so you can remove candidates from other blocks.

Naked Pair for 6 and 9, can remove these as candidates from other cells.

Naked Pair for 6 and 9, can remove these as candidates from other cells.

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

Naked Pair for 6 and 9, can remove these as candidates from other cells.

For box 5, candidates for 9 are all in column 6, so you can remove candidates from other blocks.

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

For box 2, Number 6 is only possible in cell (5,3)

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

Number 9 is the only value possible in cell (5,8).

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

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

Number 6 is the only value possible in cell (8,5).

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

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

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

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

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

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

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

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

For row 2, number 9 is only possible in cell (4,2)

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

For row 5, number 4 is only possible in cell (9,5)

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

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

Number 4 is the only value possible in cell (3,6).

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

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

Number 4 is the only value possible in cell (2,1).

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

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

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

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

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

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

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

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

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

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

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

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

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