Step-by-Step Solution

for Wednesday 17th September Fiendish

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

Single Position

For row 2, number 8 is only possible in cell (9,2)

Single Position

For row 2, number 6 is only possible in cell (3,2)

Single Position

For row 2, number 7 is only possible in cell (5,2)

Single Position

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

Candidate Lines

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

Multiple Lines

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

Naked Pairs

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

Single Candidate

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

Single Candidate

Naked Pair for 1 and 4, can remove these as candidates from other cells.

Naked Pairs

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

Single Candidate

Hidden Pair for 3 and 9, can remove other candidates from these cells.

Hidden Pairs

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

Single Position

Number 3 is the only value possible in cell (1,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (3,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (5,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (9,5).

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (7,3).

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (7,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (4,9).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate