Step-by-Step Solution

for Wednesday 20th November Diabolical

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

Single Candidate

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

Single Candidate

For column 9, Number 4 is only possible in cell (9,5)

Single Position

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

Single Position

For row 2, number 5 is only possible in cell (3,2)

Single Position

For row 2, number 4 is only possible in cell (5,2)

Single Position

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

Single Position

Number 1 is the only value possible in cell (9,7).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

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

Single Position

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

Single Position

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

Single Position

Number 1 is the only value possible in cell (2,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

For row 1, number 5 is only possible in cell (4,1)

Single Position

For row 6, number 5 is only possible in cell (7,6)

Single Position

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

Single Position

Naked Pair for 1 and 7, can remove these as candidates from other cells.

Naked Pairs

For box 3, candidates for 1 are all in column 8, so you can remove candidates from other blocks.

Candidate Lines

Hidden Triple for 2, 3 and 9, can remove other candidates from these cells.

Hidden Triples

Either candidate for cell (1,5) forces 6 into cell (8,5).

Forcing Chains

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

Single Candidate

X-Wing in columns for 6.

X-Wings

Naked Pair for 7 and 8, can remove these as candidates from other cells.

Naked Pairs

Either candidate for cell (2,5) forces 7 into cell (3,6).

Forcing Chains

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (1,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (5,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate