Step-by-Step Solution

for Friday 19th June Diabolical

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

Single Candidate

For row 1, number 4 is only possible in cell (6,1)

Single Position

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

Single Position

For row 9, number 4 is only possible in cell (3,9)

Single Position

For row 9, number 8 is only possible in cell (4,9)

Single Position

For box 8, Number 2 is only possible in cell (5,8)

Single Position

For column 6, Number 1 is only possible in cell (6,6)

Single Position

For row 4, number 1 is only possible in cell (1,4)

Single Position

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

Single Position

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

Single Position

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

Single Candidate

For column 5, Number 9 is only possible in cell (5,7)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

For row 9, number 6 is only possible in cell (1,9)

Single Position

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

Single Candidate

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

Single Candidate

For row 1, number 5 is only possible in cell (3,1)

Single Position

For box 7, candidates for 9 are all in row 8, so you can remove candidates from other blocks.

Candidate Lines

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

Multiple Lines

Either candidate for cell (3,3) forces 2 into cell (4,1).

Forcing Chains

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

Single Position

Number 5 is the only value possible in cell (7,8).

Single Candidate

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

Single Candidate

For row 4, number 5 is only possible in cell (8,4)

Single Position

For column 7, Number 8 is only possible in cell (7,4)

Single Position

For row 6, number 8 is only possible in cell (5,6)

Single Position

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

Single Position

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

Single Position

Naked Pair for 3 and 8, can remove these as candidates from other cells.

Naked Pairs

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

Single Position

Either candidate for cell (2,4) forces 3 into cell (4,5).

Forcing Chains

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (3,8).

Single Candidate

Number 6 is the only value possible in cell (3,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate