Step-by-Step Solution

for Wednesday 8th April Fiendish

For row 1, number 8 is only possible in cell (2,1)

Single Position

For column 1, Number 6 is only possible in cell (1,5)

Single Position

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

Single Position

For column 8, Number 4 is only possible in cell (8,1)

Single Position

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

Single Position

For column 5, Number 4 is only possible in cell (5,2)

Single Position

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

Single Position

For box 5, candidates for 8 are all in column 4, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

For row 2, number 5 is only possible in cell (1,2)

Single Position

For row 7, number 5 is only possible in cell (3,7)

Single Position

For row 2, number 3 is only possible in cell (7,2)

Single Position

Candidates for 7 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.

Multiple Lines

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

Multiple Lines

Candidates for 1 in boxes 2 and 5 force the candidates in box 8 to be in the remaining line.

Multiple Lines

Naked Pair for 1 and 6, can remove these as candidates from other cells.

Naked Pairs

Naked Pair for 1 and 6, can remove these as candidates from other cells.

Naked Pairs

Hidden Pair for 2 and 4, can remove other candidates from these cells.

Hidden Pairs

For row 4, number 9 is only possible in cell (7,4)

Single Position

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

Single Candidate

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

Single Position

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (7,3).

Single Candidate

For row 7, number 8 is only possible in cell (5,7)

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (5,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (6,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (8,4).

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (2,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 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 7 is the only value possible in cell (1,7).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (3,8).

Single Candidate

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

Single Candidate

Number 1 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 7 is the only value possible in cell (4,9).

Single Candidate

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

Single Candidate