Step-by-Step Solution

for Sunday 19th January Fiendish

For column 6, Number 3 is only possible in cell (6,1)

Single Position

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

Single Position

For column 4, Number 9 is only possible in cell (4,1)

Single Position

For row 9, number 6 is only possible in cell (5,9)

Single Position

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

Single Position

For column 6, Number 2 is only possible in cell (6,5)

Single Position

For row 6, number 4 is only possible in cell (2,6)

Single Position

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

Single Position

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

Single Position

For column 4, Number 2 is only possible in cell (4,9)

Single Position

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

Candidate Lines

For box 5, candidates for 7 are all in row 5, so you can remove candidates from other blocks.

Candidate Lines

Hidden Pair for 4 and 6, can remove other candidates from these cells.

Hidden Pairs

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

Single Position

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

Single Candidate

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

Single Position

Candidates for 5 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.

Multiple Lines

Hidden Pair for 7 and 8, can remove other candidates from these cells.

Hidden Pairs

For box 3, Number 5 is only possible in cell (8,1)

Single Position

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

Single Candidate

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

Single Position

For column 8, Number 2 is only possible in cell (8,7)

Single Position

Number 5 is the only value possible in cell (9,7).

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (9,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (9,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (5,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (5,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate