Step-by-Step Solution

for Monday 12th October Diabolical

For column 2, Number 8 is only possible in cell (2,1)

Single Position

For column 3, Number 9 is only possible in cell (3,7)

Single Position

For column 7, Number 1 is only possible in cell (7,3)

Single Position

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

Single Position

For row 6, number 8 is only possible in cell (5,6)

Single Position

For row 4, number 8 is only possible in cell (7,4)

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (6,8).

Single Candidate

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

Single Position

For row 8, number 1 is only possible in cell (2,8)

Single Position

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

Single Position

For row 5, number 6 is only possible in cell (2,5)

Single Position

For column 3, Number 6 is only possible in cell (3,9)

Single Position

For column 5, Number 6 is only possible in cell (5,8)

Single Position

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

Single Candidate

For box 7, candidates for 5 are all in column 1, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

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

Candidate Lines

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

Multiple Lines

Naked Pair for 2 and 7, can remove these as candidates from other cells.

Naked Pairs

Either candidate for cell (3,1) forces 2 into cell (2,7).

Forcing Chains

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

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

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (2,4).

Single Candidate

Number 9 is the only value possible in cell (5,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (6,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate