Step-by-Step Solution

for Thursday 26th June Fiendish

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

Single Candidate

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

Single Candidate

For row 8, number 2 is only possible in cell (5,8)

Single Position

For row 7, number 2 is only possible in cell (8,7)

Single Position

For row 7, number 9 is only possible in cell (1,7)

Single Position

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

Single Position

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

Single Position

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

Single Position

For box 7, candidates for 1 are all in row 8, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

For box 7, candidates for 6 are all in row 8, so you can remove candidates from other blocks.

Candidate Lines

For box 9, candidates for 6 are all in column 7, so you can remove candidates from other blocks.

Candidate Lines

For box 2, candidates for 4 are all in column 6, so you can remove candidates from other blocks.

Candidate Lines

Naked Pair for 3 and 4, can remove these as candidates from other cells.

Naked Pairs

Candidates for 4 in boxes 1 and 4 force the candidates in box 7 to be in the remaining line.

Multiple Lines

Naked Pair for 3 and 4, can remove these as candidates from other cells.

Naked Pairs

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

Single Candidate

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

Single Candidate

For blocks 2 and 8, candidates for 6 are all in the same two columns (5 and 6)

Double Pairs

Hidden Pair for 2 and 9, can remove other candidates from these cells.

Hidden Pairs

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

Single Position

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

Single Candidate

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

Single Candidate

For row 4, number 4 is only possible in cell (3,4)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (5,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (3,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (6,9).

Single Candidate

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

Single Candidate