Step-by-Step Solution

for Monday 13th October Diabolical

Number 5 is the only value possible in cell (2,1).

Single Candidate

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

Single Candidate

For row 3, number 5 is only possible in cell (6,3)

Single Position

For row 4, number 5 is only possible in cell (3,4)

Single Position

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

Single Position

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

Single Position

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

Single Position

For row 1, number 3 is only possible in cell (8,1)

Single Position

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

Single Candidate

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

Single Position

For row 8, number 1 is only possible in cell (5,8)

Single Position

For row 7, number 3 is only possible in cell (2,7)

Single Position

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

Single Position

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

Single Position

For column 3, Number 2 is only possible in cell (3,5)

Single Position

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

Single Candidate

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

Single Candidate

For column 3, Number 8 is only possible in cell (3,1)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

For row 9, number 7 is only possible in cell (2,9)

Single Position

For row 7, number 2 is only possible in cell (8,7)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

For column 4, Number 1 is only possible in cell (4,5)

Single Position

Hidden Pair for 3 and 9, can remove other candidates from these cells.

Hidden Pairs

Either candidate for cell (9,5) forces 8 into cell (1,6).

Forcing Chains

Number 7 is the only value possible in cell (1,5).

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (9,5).

Single Candidate

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

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (8,6).

Single Candidate

Number 6 is the only value possible in cell (5,7).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (8,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate