Step-by-Step Solution

for Monday 30th March Fiendish

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

Single Candidate

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

Single Position

For column 4, Number 9 is only possible in cell (4,5)

Single Position

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

Single Position

For row 5, number 8 is only possible in cell (6,5)

Single Position

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

Single Position

For box 7, Number 7 is only possible in cell (3,8)

Single Position

For column 4, Number 7 is only possible in cell (4,7)

Single Position

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

Single Position

For column 9, Number 4 is only possible in cell (9,8)

Single Position

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

Single Position

For column 4, Number 4 is only possible in cell (4,6)

Single Position

For box 9, candidates for 6 are all in column 8, so you can remove candidates from other blocks.

Candidate Lines

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

Naked Pairs

Naked Pair for 3 and 7, can remove these as candidates from other cells.

Naked Pairs

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

Hidden Pairs

For box 3, candidates for 2 are all in row 2, so you can remove candidates from other blocks.

Candidate Lines

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

Multiple Lines

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (8,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (8,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (4,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (8,9).

Single Candidate