Step-by-Step Solution

for Wednesday 2nd July Diabolical

For box 6, Number 1 is only possible in cell (7,6)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (9,7).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

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

Single Position

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

Single Position

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

Single Position

For row 4, number 6 is only possible in cell (3,4)

Single Position

For column 3, Number 9 is only possible in cell (3,6)

Single Position

For row 8, number 6 is only possible in cell (1,8)

Single Position

For row 4, number 5 is only possible in cell (2,4)

Single Position

For row 4, number 3 is only possible in cell (6,4)

Single Position

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

Single Position

For column 1, Number 4 is only possible in cell (1,7)

Single Position

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

Candidate Lines

For box 7, candidates for 2 are all in row 9, so you can remove candidates from other blocks.

Candidate Lines

For box 1, candidates for 5 are all in row 3, so you can remove candidates from other blocks.

Candidate Lines

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

Multiple Lines

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

Single Candidate

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

Naked Pairs

For blocks 1 and 3, candidates for 8 are all in the same two rows (1 and 2)

Double Pairs

Either candidate for cell (3,7) forces 1 into cell (2,2).

Forcing Chains

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (8,2).

Single Candidate

Number 4 is the only value possible in cell (7,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 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 5 is the only value possible in cell (6,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (3,7).

Single Candidate

Number 2 is the only value possible in cell (6,7).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (2,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (6,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate