Step-by-Step Solution

for Monday 13th October Fiendish

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

Single Position

For row 4, number 6 is only possible in cell (5,4)

Single Position

For row 9, number 3 is only possible in cell (6,9)

Single Position

For row 2, number 4 is only possible in cell (9,2)

Single Position

For row 3, number 4 is only possible in cell (1,3)

Single Position

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

Single Position

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

Single Position

For row 6, number 4 is only possible in cell (5,6)

Single Position

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

Single Position

For column 7, Number 3 is only possible in cell (7,6)

Single Position

For column 4, Number 3 is only possible in cell (4,5)

Single Position

For column 6, Number 7 is only possible in cell (6,3)

Single Position

Number 1 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 2 is the only value possible in cell (5,3).

Single Candidate

For column 6, Number 2 is only possible in cell (6,8)

Single Position

For row 9, number 5 is only possible in cell (1,9)

Single Position

For box 9, candidates for 2 are all in column 9, so you can remove candidates from other blocks.

Candidate Lines

For box 6, candidates for 8 are all in column 9, so you can remove candidates from other blocks.

Candidate Lines

For box 7, candidates for 7 are all in column 2, so you can remove candidates from other blocks.

Candidate Lines

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

Multiple Lines

Naked Pair for 1 and 8, can remove these as candidates from other cells.

Naked Pairs

Naked Pair for 1 and 8, can remove these as candidates from other cells.

Naked Pairs

For box 7, candidates for 8 are all in column 1, so you can remove candidates from other blocks.

Candidate Lines

Hidden Pair for 7 and 8, can remove other candidates from these cells.

Hidden Pairs

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

Multiple Lines

Naked Pair for 7 and 8, can remove these as candidates from other cells.

Naked Pairs

For column 4, Number 8 is only possible in cell (4,2)

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (8,4).

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (4,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (1,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

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

Single Candidate