Step-by-Step Solution

for Wednesday 20th November Tricky

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

Single Candidate

For row 7, number 1 is only possible in cell (3,7)

Single Position

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

Single Position

For column 2, Number 1 is only possible in cell (2,5)

Single Position

For row 7, number 6 is only possible in cell (1,7)

Single Position

For row 6, number 3 is only possible in cell (1,6)

Single Position

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

Single Position

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

Single Position

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

Single Position

For box 4, candidates for 2 are all in row 4, so you can remove candidates from other blocks.

Candidate Lines

For blocks 4 and 5, candidates for 9 are all in the same two rows (4 and 5)

Double Pairs

Naked Pair for 4 and 5, can remove these as candidates from other cells.

Naked Pairs

Candidates for 4 in boxes 4 and 6 force the candidates in box 5 to be in the remaining line.

Multiple Lines

Naked Pair for 2 and 8, can remove these as candidates from other cells.

Naked Pairs

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

Single Candidate

For row 9, number 3 is only possible in cell (6,9)

Single Position

For column 6, Number 7 is only possible in cell (6,5)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

For row 5, number 9 is only possible in cell (3,5)

Single Position

Number 4 is the only value possible in cell (3,9).

Single Candidate

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

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 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 4 is the only value possible in cell (5,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate