Step-by-Step Solution

for Tuesday 17th December Tricky

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

Single Candidate

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

Single Candidate

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

Single Position

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

Single Position

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

Single Position

For column 9, Number 1 is only possible in cell (9,2)

Single Position

For row 7, number 4 is only possible in cell (2,7)

Single Position

For row 2, number 8 is only possible in cell (3,2)

Single Position

For column 1, Number 8 is only possible in cell (1,4)

Single Position

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

Single Position

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

Single Position

For row 6, number 7 is only possible in cell (4,6)

Single Position

For row 4, number 7 is only possible in cell (2,4)

Single Position

For column 3, Number 4 is only possible in cell (3,3)

Single Position

For column 8, Number 4 is only possible in cell (8,5)

Single Position

For column 3, Number 6 is only possible in cell (3,9)

Single Position

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

Single Candidate

For column 1, Number 6 is only possible in cell (1,3)

Single Position

For column 8, Number 6 is only possible in cell (8,7)

Single Position

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

Candidate Lines

For box 1, candidates for 5 are all in column 2, so you can remove candidates from other blocks.

Candidate Lines

For box 4, candidates for 5 are all in column 3, so you can remove candidates from other blocks.

Candidate Lines

For box 7, candidates for 3 are all in row 8, so you can remove candidates from other blocks.

Candidate Lines

For box 7, candidates for 2 are all in row 8, so you can remove candidates from other blocks.

Candidate Lines

Candidates for 5 in boxes 1 and 2 force the candidates in box 3 to be in the remaining line.

Multiple Lines

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

Single Candidate

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

Single Candidate

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

Single Candidate

For row 8, number 9 is only possible in cell (7,8)

Single Position

For column 7, Number 1 is only possible in cell (7,9)

Single Position

Number 2 is the only value possible in cell (4,9).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (6,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (9,7).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (6,8).

Single Candidate

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

Single Candidate