Step-by-Step Solution

for Tuesday 16th June Fiendish

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

Single Position

For row 7, number 6 is only possible in cell (4,7)

Single Position

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

Single Position

For box 9, candidates for 1 are all in column 7, so you can remove candidates from other blocks.

Candidate Lines

For box 2, candidates for 7 are all in row 2, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

Naked Pair for 1 and 8, can remove these as candidates from other cells.

Naked Pairs

For box 7, candidates for 1 are all in column 2, so you can remove candidates from other blocks.

Candidate Lines

For box 1, candidates for 8 are all in column 1, so you can remove candidates from other blocks.

Candidate Lines

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

Single Position

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

Single Candidate

For row 8, number 1 is only possible in cell (7,8)

Single Position

For row 4, number 6 is only possible in cell (7,4)

Single Position

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

Single Position

For row 9, number 1 is only possible in cell (2,9)

Single Position

For box 6, candidates for 9 are all in row 5, so you can remove candidates from other blocks.

Candidate Lines

For blocks 5 and 8, candidates for 9 are all in the same two columns (4 and 5)

Double Pairs

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

Single Candidate

Candidates for 7 in boxes 4 and 5 force the candidates in box 6 to be in the remaining line.

Multiple Lines

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

Single Candidate

Number 9 is the only value possible in cell (5,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (9,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (5,9).

Single Candidate

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

Single Candidate

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

Single Candidate