Step-by-Step Solution

for Tuesday 21st July Tricky

For column 4, Number 1 is only possible in cell (4,9)

Single Position

For row 4, number 8 is only possible in cell (5,4)

Single Position

For column 4, Number 8 is only possible in cell (4,3)

Single Position

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

Single Position

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

Candidate Lines

Naked Pair for 6 and 9, can remove these as candidates from other cells.

Naked Pairs

Naked Pair for 6 and 9, can remove these as candidates from other cells.

Naked Pairs

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

Single Position

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

Single Position

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

Single Position

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

Single Position

For column 6, Number 5 is only possible in cell (6,3)

Single Position

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 6 and 9, can remove these as candidates from other cells.

Naked Pairs

For row 3, number 9 is only possible in cell (7,3)

Single Position

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 8 is the only value possible in cell (2,1).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (1,6).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 9 is the only value possible in cell (4,7).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

Number 6 is the only value possible in cell (4,8).

Single Candidate

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

Single Candidate

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

Single Candidate

Number 3 is the only value possible in cell (5,8).

Single Candidate

Number 5 is the only value possible in cell (9,8).

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate

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

Single Candidate