Step-by-Step Solution

for Thursday 3rd April Fiendish

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

Single Candidate

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

Single Position

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

Single Position

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

Single Position

For column 9, Number 5 is only possible in cell (9,7)

Single Position

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

Single Position

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

Single Position

For row 5, number 8 is only possible in cell (9,5)

Single Position

For box 8, candidates for 9 are all in column 4, so you can remove candidates from other blocks.

Candidate Lines

For box 8, candidates for 2 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 8, so you can remove candidates from other blocks.

Candidate Lines

For box 9, candidates for 7 are all in row 8, so you can remove candidates from other blocks.

Candidate Lines

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

Multiple Lines

Naked Pair for 1 and 5, can remove these as candidates from other cells.

Naked Pairs

For row 1, number 5 is only possible in cell (4,1)

Single Position

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

Multiple Lines

Hidden Pair for 4 and 5, can remove other candidates from these cells.

Hidden Pairs

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

For row 9, number 1 is only possible in cell (4,9)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

For row 3, number 8 is only possible in cell (6,3)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (3,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate