Step-by-Step Solution

for Thursday 24th April Fiendish

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

Single Candidate

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

Single Candidate

Number 5 is the only value possible in cell (6,7).

Single Candidate

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

Single Candidate

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

Single Candidate

For row 3, number 2 is only possible in cell (1,3)

Single Position

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

Single Position

For row 5, number 9 is only possible in cell (2,5)

Single Position

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

Single Position

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

Single Position

Naked Pair for 5 and 8, can remove these as candidates from other cells.

Naked Pairs

For box 7, candidates for 8 are all in column 3, so you can remove candidates from other blocks.

Candidate Lines

Candidates for 5 in boxes 1 and 7 force the candidates in box 4 to be in the remaining line.

Multiple Lines

Naked Pair for 3 and 8, 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 8 and 9, can remove other candidates from these cells.

Hidden Pairs

For row 1, number 3 is only possible in cell (5,1)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (4,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 5 is the only value possible in cell (4,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (6,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (5,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate