Step-by-Step Solution

for Thursday 27th March Diabolical

For column 5, Number 9 is only possible in cell (5,1)

Single Position

For row 2, number 9 is only possible in cell (3,2)

Single Position

For row 5, number 9 is only possible in cell (2,5)

Single Position

For column 5, Number 8 is only possible in cell (5,9)

Single Position

For row 2, number 4 is only possible in cell (7,2)

Single Position

For column 3, Number 4 is only possible in cell (3,9)

Single Position

For column 9, Number 4 is only possible in cell (9,4)

Single Position

For box 6, Number 2 is only possible in cell (8,6)

Single Position

For row 8, number 3 is only possible in cell (2,8)

Single Position

For column 5, Number 2 is only possible in cell (5,4)

Single Position

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

Single Position

Candidates for 1 in boxes 2 and 8 force the candidates in box 5 to be in the remaining line.

Multiple Lines

Candidates for 5 in boxes 2 and 8 force the candidates in box 5 to be in the remaining line.

Multiple Lines

For row 4, number 5 is only possible in cell (1,4)

Single Position

Naked Pair for 6 and 7, can remove these as candidates from other cells.

Naked Pairs

Either candidate for cell (3,5) forces 8 into cell (7,5).

Forcing Chains

Either candidate for cell (3,5) forces 9 into cell (9,8).

Forcing Chains

Number 8 is the only value possible in cell (9,7).

Single Candidate

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

Single Position

For row 7, number 4 is only possible in cell (6,7)

Single Position

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

Single Candidate

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

Single Candidate

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

Candidate Lines

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (2,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (8,1).

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (4,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (4,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (8,7).

Single Candidate

Number 2 is the only value possible in cell (6,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 5 is the only value possible in cell (4,9).

Single Candidate

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

Single Candidate

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

Single Candidate