Step-by-Step Solution

for Wednesday 16th April Diabolical

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

For column 3, Number 8 is only possible in cell (3,7)

Single Position

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

Single Position

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

Single Position

For row 3, number 7 is only possible in cell (4,3)

Single Position

For row 5, number 7 is only possible in cell (1,5)

Single Position

For row 9, number 7 is only possible in cell (5,9)

Single Position

For row 9, number 8 is only possible in cell (6,9)

Single Position

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

Single Position

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

Single Position

For column 1, Number 9 is only possible in cell (1,8)

Single Position

For column 8, Number 1 is only possible in cell (8,7)

Single Position

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

Single Position

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

Single Position

For row 9, number 6 is only possible in cell (4,9)

Single Position

For box 3, Number 3 is only possible in cell (7,3)

Single Position

For box 7, Number 3 is only possible in cell (2,8)

Single Position

For box 9, candidates for 4 are all in column 7, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

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

Single Position

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

Single Candidate

For box 2, candidates for 5 are all in column 6, so you can remove candidates from other blocks.

Candidate Lines

Candidates for 6 in boxes 1 and 3 force the candidates in box 2 to be in the remaining line.

Multiple Lines

Either candidate for cell (8,4) forces 6 into cell (6,5).

Forcing Chains

For row 1, number 6 is only possible in cell (5,1)

Single Position

For blocks 2 and 8, candidates for 3 are all in the same two columns (4 and 6)

Double Pairs

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (4,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (8,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (7,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (4,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate