Step-by-Step Solution

for Tuesday 10th March Fiendish

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

Single Position

Number 9 is the only value possible in cell (8,7).

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (4,7).

Single Candidate

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

Single Candidate

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

Single Candidate

For row 3, number 1 is only possible in cell (6,3)

Single Position

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

Single Position

For row 5, number 1 is only possible in cell (9,5)

Single Position

For row 2, number 1 is only possible in cell (8,2)

Single Position

For row 6, number 1 is only possible in cell (3,6)

Single Position

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

Single Position

For box 5, Number 9 is only possible in cell (6,6)

Single Position

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

Single Position

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

Single Position

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

Candidate Lines

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

Candidate Lines

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

Single Position

For column 4, Number 8 is only possible in cell (4,2)

Single Position

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

Candidate Lines

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (9,8).

Single Candidate

For column 4, Number 3 is only possible in cell (4,5)

Single Position

For box 5, candidates for 6 are all in row 5, so you can remove candidates from other blocks.

Candidate Lines

Candidates for 9 in boxes 2 and 3 force the candidates in box 1 to be in the remaining line.

Multiple Lines

X-Wing in columns for 4.

X-Wings

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (9,1).

Single Candidate

Number 8 is the only value possible in cell (2,3).

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (1,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (5,2).

Single Candidate

Number 9 is the only value possible in cell (1,4).

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (9,4).

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (2,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (7,6).

Single Candidate

Number 3 is the only value possible in cell (2,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (6,8).

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (6,9).

Single Candidate

Number 8 is the only value possible in cell (7,9).

Single Candidate

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

Single Candidate