Step-by-Step Solution

for Saturday 22nd February Tricky

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

For row 8, number 9 is only possible in cell (1,8)

Single Position

For row 3, number 8 is only possible in cell (7,3)

Single Position

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

Single Position

For row 5, number 8 is only possible in cell (9,5)

Single Position

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

Single Position

For row 3, number 7 is only possible in cell (6,3)

Single Position

For row 9, number 7 is only possible in cell (1,9)

Single Position

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

Single Position

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

Single Position

For box 2, candidates for 3 are all in column 5, so you can remove candidates from other blocks.

Candidate Lines

Candidates for 3 in boxes 4 and 7 force the candidates in box 1 to be in the remaining line.

Multiple Lines

Candidates for 6 in boxes 4 and 7 force the candidates in box 1 to be in the remaining line.

Multiple Lines

Naked Pair for 5 and 6, can remove these as candidates from other cells.

Naked Pairs

For row 2, number 5 is only possible in cell (7,2)

Single Position

For row 2, number 9 is only possible in cell (8,2)

Single Position

For row 2, number 6 is only possible in cell (1,2)

Single Position

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

Single Position

For row 2, number 3 is only possible in cell (5,2)

Single Position

For column 7, Number 3 is only possible in cell (7,9)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (2,8).

Single Candidate

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

Single Candidate

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

Single Candidate

For row 1, number 4 is only possible in cell (3,1)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (3,9).

Single Candidate