Step-by-Step Solution

for Sunday 30th August Diabolical

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

Single Candidate

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

Single Position

For box 9, Number 1 is only possible in cell (7,7)

Single Position

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

Single Position

For column 5, Number 8 is only possible in cell (5,7)

Single Position

For column 5, Number 9 is only possible in cell (5,1)

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

For column 1, Number 7 is only possible in cell (1,5)

Single Position

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

Single Position

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

Single Position

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

Single Position

For row 3, number 4 is only possible in cell (8,3)

Single Position

For row 3, number 7 is only possible in cell (9,3)

Single Position

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

Single Position

For row 7, number 4 is only possible in cell (3,7)

Single Position

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

Single Position

For column 9, Number 8 is only possible in cell (9,2)

Single Position

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

Single Candidate

Number 8 is the only value possible in cell (2,3).

Single Candidate

For row 9, number 1 is only possible in cell (5,9)

Single Position

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

Candidate Lines

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

Candidate Lines

Candidates for 3 in boxes 2 and 8 force the candidates in box 5 to be in the remaining line.

Multiple Lines

Naked Pair for 2 and 5, can remove these as candidates from other cells.

Naked Pairs

Naked Pair for 2 and 5, can remove these as candidates from other cells.

Naked Pairs

X-Wing in columns for 5.

X-Wings

Either candidate for cell (4,1) forces 2 into cell (7,4).

Forcing Chains

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (3,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (1,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate