Step-by-Step Solution

for Thursday 14th August Fiendish

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

Single Candidate

For row 1, number 9 is only possible in cell (6,1)

Single Position

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

Single Position

For row 5, number 9 is only possible in cell (3,5)

Single Position

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

Single Position

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

Single Position

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

Single Position

For row 4, number 5 is only possible in cell (7,4)

Single Position

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

Single Position

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

Single Position

For row 7, number 5 is only possible in cell (6,7)

Single Position

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

Single Position

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

Single Position

For box 3, candidates for 6 are all in column 8, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

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

Candidate Lines

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

Candidate Lines

For box 3, candidates for 1 are all in column 8, so you can remove candidates from other blocks.

Candidate Lines

Naked Pair for 4 and 8, can remove these as candidates from other cells.

Naked Pairs

Candidates for 8 in boxes 1 and 2 force the candidates in box 3 to be in the remaining line.

Multiple Lines

Candidates for 4 in boxes 1 and 2 force the candidates in box 3 to be in the remaining line.

Multiple Lines

Naked Pair for 3 and 6, can remove these as candidates from other cells.

Naked Pairs

For column 5, Number 6 is only possible in cell (5,9)

Single Position

For row 9, number 8 is only possible in cell (4,9)

Single Position

For column 5, Number 8 is only possible in cell (5,1)

Single Position

For box 2, Number 7 is only possible in cell (6,3)

Single Position

For box 8, Number 3 is only possible in cell (6,9)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (5,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (7,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (8,9).

Single Candidate

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

Single Candidate