Step-by-Step Solution

for Sunday 20th September Fiendish

For column 3, Number 7 is only possible in cell (3,4)

Single Position

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

Single Position

For column 6, Number 7 is only possible in cell (6,8)

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Candidate Lines

Candidates for 2 in boxes 2 and 3 force the candidates in box 1 to be in the remaining line.

Multiple Lines

Naked Pair for 2 and 8, can remove these as candidates from other cells.

Naked Pairs

For column 7, Number 8 is only possible in cell (7,2)

Single Position

Hidden Pair for 1 and 9, can remove other candidates from these cells.

Hidden Pairs

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

Single Position

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

Single Position

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

Single Candidate

For column 2, Number 6 is only possible in cell (2,1)

Single Position

For row 8, number 2 is only possible in cell (5,8)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (7,3).

Single Candidate

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

Single Candidate

For row 6, number 7 is only possible in cell (8,6)

Single Position

For column 6, Number 2 is only possible in cell (6,2)

Single Position

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

Single Candidate

Number 4 is the only value possible in cell (8,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (4,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (8,9).

Single Candidate