Step-by-Step Solution

for Friday 15th August Tricky

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

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

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

Single Position

For column 1, Number 7 is only possible in cell (1,2)

Single Position

For row 2, number 9 is only possible in cell (3,2)

Single Position

For row 1, number 7 is only possible in cell (4,1)

Single Position

For row 9, number 6 is only possible in cell (5,9)

Single Position

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

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Position

For row 8, number 6 is only possible in cell (9,8)

Single Position

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

Candidate Lines

For box 2, candidates for 4 are all in row 1, so you can remove candidates from other blocks.

Candidate Lines

For blocks 1 and 3, candidates for 2 are all in the same two rows (1 and 3)

Double Pairs

For column 5, Number 2 is only possible in cell (5,2)

Single Position

Naked Pair for 2 and 4, can remove these as candidates from other cells.

Naked Pairs

Naked Pair for 1 and 4, can remove these as candidates from other cells.

Naked Pairs

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

Multiple Lines

For blocks 2 and 8, candidates for 1 are all in the same two columns (4 and 6)

Double Pairs

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

Single Position

Number 4 is the only value possible in cell (9,3).

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (2,1).

Single Candidate

Number 2 is the only value possible in cell (3,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 4 is the only value possible in cell (1,8).

Single Candidate

Number 3 is the only value possible in cell (1,5).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (5,6).

Single Candidate

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

Single Candidate

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

Single Candidate

Number 7 is the only value possible in cell (8,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 1 is the only value possible in cell (6,2).

Single Candidate

Number 5 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 (4,8).

Single Candidate

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

Single Candidate

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

Single Candidate