Step-by-Step Solution

for Friday 19th September Tricky

For row 1, number 6 is only possible in cell (9,1)

Single Position

For column 9, Number 7 is only possible in cell (9,6)

Single Position

For row 1, number 4 is only possible in cell (6,1)

Single Position

For column 6, Number 5 is only possible in cell (6,2)

Single Position

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

Single Position

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

Single Position

For box 3, candidates for 5 are all in row 3, so you can remove candidates from other blocks.

Candidate Lines

For box 7, candidates for 4 are all in row 8, so you can remove candidates from other blocks.

Candidate Lines

For box 5, candidates for 9 are all in row 6, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

For blocks 3 and 9, candidates for 5 are all in the same two columns (7 and 8)

Double Pairs

For blocks 1 and 4, candidates for 2 are all in the same two columns (1 and 3)

Double Pairs

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

Single Candidate

For blocks 5 and 8, candidates for 9 are all in the same two columns (5 and 6)

Double Pairs

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

Multiple Lines

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

Single Candidate

Number 6 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 3 is the only value possible in cell (4,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 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 6 is the only value possible in cell (8,4).

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (1,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (4,3).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (2,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (1,9).

Single Candidate

Number 7 is the only value possible in cell (4,9).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate