Step-by-Step Solution

for Monday 27th October Fiendish

For column 3, Number 2 is only possible in cell (3,8)

Single Position

For column 5, Number 2 is only possible in cell (5,6)

Single Position

For column 2, Number 4 is only possible in cell (2,1)

Single Position

For column 5, Number 5 is only possible in cell (5,4)

Single Position

For column 3, Number 5 is only possible in cell (3,2)

Single Position

For row 7, number 6 is only possible in cell (2,7)

Single Position

For box 7, candidates for 5 are all in row 8, so you can remove candidates from other blocks.

Candidate Lines

For box 5, candidates for 4 are all in row 4, so you can remove candidates from other blocks.

Candidate Lines

For box 5, candidates for 6 are all in column 6, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

Candidates for 8 in boxes 4 and 7 force the candidates in box 1 to be in the remaining line.

Multiple Lines

Naked Pair for 5 and 7, can remove these as candidates from other cells.

Naked Pairs

For column 8, Number 5 is only possible in cell (8,7)

Single Position

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

Single Position

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

Single Position

For row 4, number 6 is only possible in cell (8,4)

Single Position

For row 1, number 6 is only possible in cell (5,1)

Single Position

For row 3, number 6 is only possible in cell (1,3)

Single Position

For row 2, number 6 is only possible in cell (7,2)

Single Position

For column 7, Number 2 is only possible in cell (7,9)

Single Position

For box 6, candidates for 3 are all in column 9, so you can remove candidates from other blocks.

Candidate Lines

For box 3, candidates for 9 are all in column 9, so you can remove candidates from other blocks.

Candidate Lines

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

Single Candidate

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

Single Position

Candidates for 7 in boxes 5 and 6 force the candidates in box 4 to be in the remaining line.

Multiple Lines

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

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

Single Position

For column 8, Number 3 is only possible in cell (8,1)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 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 1 is the only value possible in cell (5,9).

Single Candidate

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

Single Candidate