Step-by-Step Solution

for Tuesday 17th February Fiendish

For column 7, Number 9 is only possible in cell (7,1)

Single Position

For row 3, number 8 is only possible in cell (9,3)

Single Position

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

Single Position

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

Single Position

For row 5, number 3 is only possible in cell (9,5)

Single Position

For row 6, number 3 is only possible in cell (2,6)

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

For row 6, number 9 is only possible in cell (4,6)

Single Position

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

Single Candidate

For row 2, number 9 is only possible in cell (6,2)

Single Position

For box 2, Number 7 is only possible in cell (5,3)

Single Position

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

Single Position

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

Single Position

For row 5, number 2 is only possible in cell (4,5)

Single Position

For box 1, Number 2 is only possible in cell (3,1)

Single Position

For box 5, Number 5 is only possible in cell (6,4)

Single Position

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

Single Candidate

For box 9, Number 6 is only possible in cell (9,8)

Single Position

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

Single Candidate

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

Single Candidate

For column 3, Number 5 is only possible in cell (3,3)

Single Position

For blocks 4 and 5, candidates for 1 are all in the same two rows (4 and 5)

Double Pairs

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

For row 7, number 9 is only possible in cell (2,7)

Single Position

For row 3, number 9 is only possible in cell (1,3)

Single Position

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

Single Position

X-Wing in rows for 6.

X-Wings

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 5 is the only value possible in cell (9,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate