Step-by-Step Solution

for Saturday 25th October Tricky

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

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

Single Position

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

Single Position

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

Single Position

For row 6, number 8 is only possible in cell (1,6)

Single Position

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

Single Position

For row 5, number 6 is only possible in cell (1,5)

Single Position

For column 3, Number 6 is only possible in cell (3,8)

Single Position

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

Candidate Lines

For box 6, candidates for 5 are all in column 8, so you can remove candidates from other blocks.

Candidate Lines

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

Candidate Lines

For box 6, candidates for 4 are all in column 9, so you can remove candidates from other blocks.

Candidate Lines

Number 2 is the only value possible in cell (9,3).

Single Candidate

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

Single Position

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

Single Position

For row 7, number 6 is only possible in cell (5,7)

Single Position

For row 3, number 6 is only possible in cell (4,3)

Single Position

Naked Pair for 3 and 4, can remove these as candidates from other cells.

Naked Pairs

Number 7 is the only value possible in cell (6,5).

Single Candidate

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

Candidate Lines

Candidates for 4 in boxes 5 and 8 force the candidates in box 2 to be in the remaining line.

Multiple Lines

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

Single Candidate

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

For row 1, number 4 is only possible in cell (2,1)

Single Position

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (6,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (9,2).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate