Step-by-Step Solution

for Saturday 4th April Diabolical

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

Single Candidate

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

Single Position

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

Single Position

For column 4, Number 7 is only possible in cell (4,2)

Single Position

For column 3, Number 5 is only possible in cell (3,1)

Single Position

Candidates for 3 in boxes 4 and 6 force the candidates in box 5 to be in the remaining line.

Multiple Lines

Candidates for 1 in boxes 2 and 5 force the candidates in box 8 to be in the remaining line.

Multiple Lines

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

Single Candidate

Number 6 is the only value possible in cell (1,7).

Single Candidate

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

Single Candidate

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

Single Position

For row 6, number 4 is only possible in cell (1,6)

Single Position

Number 9 is the only value possible in cell (3,5).

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (1,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (3,8).

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (2,8).

Single Candidate

For column 4, Number 9 is only possible in cell (4,8)

Single Position

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

Single Position

Naked Pair for 3 and 6, can remove these as candidates from other cells.

Naked Pairs

Either candidate for cell (8,1) forces 9 into cell (9,4).

Forcing Chains

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (4,9).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (8,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 5 is the only value possible in cell (8,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (1,9).

Single Candidate

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

Single Candidate