Step-by-Step Solution

for Wednesday 7th January Tricky

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

Single Position

For row 2, number 4 is only possible in cell (9,2)

Single Position

For box 3, Number 2 is only possible in cell (9,3)

Single Position

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

Single Position

For box 7, candidates for 9 are all in column 1, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

For box 3, candidates for 6 are all in row 1, so you can remove candidates from other blocks.

Candidate Lines

For box 6, candidates for 7 are all in row 5, so you can remove candidates from other blocks.

Candidate Lines

Naked Pair for 4 and 6, can remove these as candidates from other cells.

Naked Pairs

For box 8, candidates for 4 are all in column 5, so you can remove candidates from other blocks.

Candidate Lines

Candidates for 6 in boxes 2 and 8 force the candidates in box 5 to be in the remaining line.

Multiple Lines

Naked Pair for 7 and 8, can remove these as candidates from other cells.

Naked Pairs

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

Single Candidate

For row 8, number 2 is only possible in cell (1,8)

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (5,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (3,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (8,5).

Single Candidate

Number 7 is the only value possible in cell (9,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (4,2).

Single Candidate

Number 8 is the only value possible in cell (5,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (7,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (3,9).

Single Candidate

Number 7 is the only value possible in cell (5,9).

Single Candidate

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

Single Candidate

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

Single Candidate