Step-by-Step Solution

for Sunday 7th September Diabolical

Number 3 is the only value possible in cell (7,5).

Single Candidate

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

Single Candidate

For row 3, number 9 is only possible in cell (1,3)

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

For column 7, Number 5 is only possible in cell (7,6)

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

For box 7, candidates for 6 are all in row 9, so you can remove candidates from other blocks.

Candidate Lines

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

Single Candidate

Number 6 is the only value possible in cell (8,4).

Single Candidate

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

Single Candidate

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

Single Position

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

Single Position

For row 6, number 3 is only possible in cell (5,6)

Single Position

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

Single Position

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

Single Position

For row 4, number 2 is only possible in cell (3,4)

Single Position

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

Single Position

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

Single Position

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

Single Position

For row 7, number 5 is only possible in cell (9,7)

Single Position

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

Single Position

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

Single Position

For row 8, number 1 is only possible in cell (3,8)

Single Position

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

Candidate Lines

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

Multiple Lines

Either candidate for cell (2,9) forces 5 into cell (5,3).

Forcing Chains

Number 8 is the only value possible in cell (5,4).

Single Candidate

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

Single Candidate

Either candidate for cell (1,7) forces 7 into cell (5,1).

Forcing Chains

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

Single Candidate

Number 8 is the only value possible in cell (6,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (1,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate