Step-by-Step Solution

for Saturday 21st December Tricky

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

Single Position

For row 4, number 4 is only possible in cell (5,4)

Single Position

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

Single Position

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

Single Position

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

Single Candidate

For row 2, number 5 is only possible in cell (6,2)

Single Position

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

Single Position

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

Candidate Lines

For box 1, candidates for 2 are all in column 3, so you can remove candidates from other blocks.

Candidate Lines

For box 9, candidates for 4 are all in row 7, so you can remove candidates from other blocks.

Candidate Lines

Naked Pair for 2 and 9, can remove these as candidates from other cells.

Naked Pairs

Hidden Pair for 4 and 7, can remove other candidates from these cells.

Hidden Pairs

For column 3, Number 8 is only possible in cell (3,5)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (2,7).

Single Candidate

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

Single Position

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

Single Position

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

Single Position

For row 8, number 7 is only possible in cell (4,8)

Single Position

For row 9, number 5 is only possible in cell (1,9)

Single Position

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

Single Position

For row 6, number 3 is only possible in cell (5,6)

Single Position

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

Single Position

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

Single Position

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

Single Candidate

For row 3, number 4 is only possible in cell (7,3)

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 2 is the only value possible in cell (7,5).

Single Candidate

Number 3 is the only value possible in cell (7,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate