Step-by-Step Solution

for Saturday 19th April Fiendish

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

Single Position

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

Single Position

For box 4, Number 3 is only possible in cell (2,4)

Single Position

For column 9, Number 8 is only possible in cell (9,7)

Single Position

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

Candidate Lines

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

Single Candidate

For box 1, candidates for 7 are all in row 3, so you can remove candidates from other blocks.

Candidate Lines

For column 9, Number 7 is only possible in cell (9,2)

Single Position

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

Single Candidate

Number 2 is the only value possible in cell (9,3).

Single Candidate

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

Single Candidate

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

Single Position

For row 8, number 6 is only possible in cell (2,8)

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

For row 5, number 3 is only possible in cell (8,5)

Single Position

For row 9, number 3 is only possible in cell (7,9)

Single Position

For row 5, number 2 is only possible in cell (3,5)

Single Position

For box 4, 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 3 force the candidates in box 2 to be in the remaining line.

Multiple Lines

Candidates for 8 in boxes 4 and 6 force the candidates in box 5 to be in the remaining line.

Multiple Lines

Naked Pair for 5 and 9, can remove these as candidates from other cells.

Naked Pairs

Hidden Pair for 5 and 9, can remove other candidates from these cells.

Hidden Pairs

For row 7, number 3 is only possible in cell (1,7)

Single Position

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (1,3).

Single Candidate

For row 8, number 3 is only possible in cell (4,8)

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (3,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate