Step-by-Step Solution

for Tuesday 25th November Diabolical

For row 9, number 3 is only possible in cell (6,9)

Single Position

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

Single Position

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

Single Position

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

Single Position

For row 6, number 2 is only possible in cell (8,6)

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

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

Single Position

For column 2, Number 3 is only possible in cell (2,1)

Single Position

For row 2, number 6 is only possible in cell (3,2)

Single Position

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

Single Position

For column 4, Number 6 is only possible in cell (4,7)

Single Position

For column 8, Number 6 is only possible in cell (8,9)

Single Position

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

Single Candidate

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

Single Position

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

Candidate Lines

For box 5, candidates for 1 are all in row 4, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

For box 5, candidates for 7 are all in row 6, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

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

Multiple Lines

Naked Pair for 5 and 7, can remove these as candidates from other cells.

Naked Pairs

Either candidate for cell (1,2) forces 8 into cell (1,7).

Forcing Chains

Number 5 is the only value possible in cell (1,6).

Single Candidate

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

Single Candidate

Naked Pair for 1 and 4, can remove these as candidates from other cells.

Naked Pairs

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

Forcing Chains

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

Single Candidate

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

Single Candidate

For column 4, Number 9 is only possible in cell (4,6)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (9,4).

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (7,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate