Step-by-Step Solution

for Saturday 20th December Tricky

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

Single Position

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

Single Position

For row 8, number 8 is only possible in cell (6,8)

Single Position

For row 9, number 8 is only possible in cell (3,9)

Single Position

For column 4, Number 8 is only possible in cell (4,4)

Single Position

For column 3, Number 6 is only possible in cell (3,7)

Single Position

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

Single Position

For column 4, Number 6 is only possible in cell (4,9)

Single Position

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

Single Position

For column 9, Number 3 is only possible in cell (9,8)

Single Position

For column 4, Number 5 is only possible in cell (4,7)

Single Position

For column 6, Number 5 is only possible in cell (6,4)

Single Position

For box 4, candidates for 9 are all in column 3, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

For box 4, candidates for 3 are all in column 3, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

For box 8, candidates for 1 are all in column 6, so you can remove candidates from other blocks.

Candidate Lines

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 5 are all in column 1, so you can remove candidates from other blocks.

Candidate Lines

For box 8, candidates for 2 are all in column 6, so you can remove candidates from other blocks.

Candidate Lines

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

Single Candidate

Candidates for 4 in boxes 2 and 3 force the candidates in box 1 to be in the remaining line.

Multiple Lines

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (6,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (5,4).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (4,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate