Step-by-Step Solution

for Sunday 19th October Fiendish

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

For column 6, Number 8 is only possible in cell (6,1)

Single Position

Naked Pair for 3 and 5, can remove these as candidates from other cells.

Naked Pairs

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

Multiple Lines

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

Multiple Lines

Hidden Pair for 6 and 7, can remove other candidates from these cells.

Hidden Pairs

For row 7, number 4 is only possible in cell (1,7)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (7,9).

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (5,6).

Single Candidate

For row 7, number 8 is only possible in cell (9,7)

Single Position

For row 8, number 1 is only possible in cell (5,8)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (5,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (2,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 5 is the only value possible in cell (9,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (4,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate