# Step-by-Step Solutionfor Thursday 23rd June Fiendish

## After

First step:
Add in all possible valid pencilmarks.

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

Single Position

For row 1, number 2 is only possible in cell (6,1)

Single Position

For column 7, Number 5 is only possible in cell (7,1)

Single Position

For row 1, number 9 is only possible in cell (8,1)

Single Position

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

Single Position

For box 4, candidates for 9 are all in column 3, so you can remove candidates from other blocks.

Candidate Lines

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

Single Position

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

Candidate Lines

For box 4, candidates for 1 are all in column 2, so you can remove candidates from other blocks.

Candidate Lines

For box 5, candidates for 7 are all in row 6, so you can remove candidates from other blocks.

Candidate Lines

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

Multiple Lines

Naked Pair for 1 and 7, can remove these as candidates from other cells.

Naked Pairs

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

Single Position

For blocks 1 and 2, candidates for 7 are all in the same two rows (1 and 2)

Double Pairs

Naked Pair for 1 and 6, can remove these as candidates from other cells.

Naked Pairs

Hidden Pair for 1 and 9, can remove other candidates from these cells.

Hidden Pairs

For row 4, number 8 is only possible in cell (8,4)

Single Position

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

Single Candidate

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

Single Candidate

For row 9, number 7 is only possible in cell (4,9)

Single Position

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (2,1).

Single Candidate

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

Single Candidate

For row 2, number 7 is only possible in cell (6,2)

Single Position

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

Single Position

Number 5 is the only value possible in cell (4,6).

Single Candidate

Number 3 is the only value possible in cell (5,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (9,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (3,4).

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (3,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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