6 printable medium 20x20 nonograms

Six grids verified solvable without guessing, ready for paper: crisp clues, pure black and white, optional solutions on a separate page.

Puzzle 1

2
1
3
7
4
4
2
1
1
2
2
3
6
1
5
1
1
1
6
8
1
5
1
1
1
1
1
4
3
2
2
3
1
1
7
8
3
1
2
1
3
2
2
1
2
1
1
3
3
4
2
1
1
2
2
1
4
1
1
2
3
1
7
2
3
2
2
3
2
3
2
3
4
11
1
1
2
2
2
1
3
1
4
3
1
4
1
1
1
2
1
2
2
1
1
2
1
14
1
1
1 1 5 1 1 1 2
5 2 1 6
9 1 1 1 1 1
1 2 6 2 3
5 2 4 1
3 1 3 1 4 2
5 1 2 1 3
2 1 1 2 6 1
2 1 3 1 4 3
1 2 2 1 5
2 1 2 1 1 4 1
2 6 5 1
1 2 4 2 2
1 1 1 1 2 1 1
9 4 3
1 4 2 5 1
6 1 2 5
1 3 1 1 3 1 1
4 5 2 3
1 1 1 3 2 2

Puzzle 2

7
1
2
2
1
1
5
4
2
1
1
5
2
3
3
1
4
3
1
1
1
1
8
1
1
4
1
1
2
2
1
2
1
1
1
1
2
2
1
1
1
1
1
1
1
5
2
1
1
7
2
4
2
1
1
1
4
1
1
6
5
2
1
3
1
1
1
1
3
4
4
1
2
1
3
1
1
2
1
2
2
2
8
1
1
6
2
3
1
1
3
2
1
2
2
3
5
4
1
1
3 1 4 2 2 2
1 1 1 1 1 2 2 1
4 2 1 2 1 1
4 2 1 1 5
4 1 1 2 4
2 2 1 1 1 1 3
3 7 1 1
1 3 3 1 1
2 1 1 2 4
3 2 3 5
3 1 2 1 1
3 1 2 2 1 2
2 1 4 1
2 2 1 1 2 6
3 2 6 4
3 4 1
1 1 1 2 1 2 1 1
2 2 4 3 1
1 1 1 2 3
3 2 2 1 2 1

Puzzle 3

2
1
4
1
1
1
1
2
4
6
1
5
1
2
4
1
1
1
1
1
1
2
2
3
2
3
2
2
1
12
1
1
1
1
1
1
5
1
8
1
3
3
4
1
1
1
5
1
5
1
5
2
1
3
2
1
1
1
6
2
1
1
2
1
3
4
2
2
1
1
4
2
1
1
2
1
1
1
2
2
2
1
1
4
2
2
1
4
4
3
2
6
4
1
2
4
2
1
6
1
1
1
2
3
3
1
1 2 3 2 4
3 2 5 1 3
8 2 2 1
1 2 3 4
4 3 4 1 1 1
2 3 1 1 4
2 4 1 3 4
6 1 5 2 1
1 1 7 4
2 5 1 1
1 2 1 1 1 1 1
2 2 1 1 6
4 1 4 5
1 3 1 1 4
1 1 6 2 4
1 2 5 1 2
1 2 6 1 1 1
3 5 2 3 1
3 2 1 2 1
1 1 3 3 3

Puzzle 4

2
1
1
1
4
2
1
2
5
2
4
1
1
1
3
2
2
3
1
2
1
1
2
1
1
1
1
1
1
2
1
2
2
1
3
1
4
1
2
3
2
2
3
3
1
5
6
2
1
3
3
5
2
2
1
1
4
1
3
2
1
1
2
1
1
1
3
3
5
3
2
1
1
1
3
6
1
1
5
2
3
4
2
3
2
4
5
6
1
1
6
1
3
1
2
3
1
5
4
2
1 2 1 1 1 1 3 1
5 1 1 1 1 4
1 1 5 1 1 3
2 1 2 4
3 1 3 6
1 1 1 1 2 1 4
1 1 1 7 1
1 2 1 5 1 1
3 3 2 3 1 1
2 3 1 3 3
2 2 1 1 1 1 1
1 1 1 1 1 1
1 3 2 7
3 2 1 4 2
1 1 3 2 2
3 5 1 2 1
4 2 1 1 3 2
1 2 1 2 6
1 9 5
1 6 2 2

Puzzle 5

2
1
2
3
2
1
1
1
1
6
1
1
1
6
2
1
2
1
2
3
2
3
3
2
1
3
1
1
1
2
1
6
3
1
1
2
1
1
1
1
2
5
2
1
1
1
2
2
3
5
7
6
3
5
2
4
1
1
1
2
1
2
5
1
1
1
3
1
1
5
1
1
2
2
1
1
1
1
2
2
1
1
3
2
1
4
1
2
1
1
5
1
2
4
1
3
3
1
1
1
1
1
1
4
1
1
1
1
4
1 1 4 4 1 3
2 2 5 2 1 1
1 3 2 2 1
3 1 1 1
1 7 1 1 2
1 3 3 1 3 1
3 2 2 2 2
2 1 6 1 1
1 1 4 3 1
1 2 2 2 1 2
4 3 2 3
9 1 1
2 5 3 1
4 1 1 1 4
7 4 3
1 1 1 1 3 2
2 3 1 7 1
1 2 3 1 1 3 1
1 1 2 2 1 1 1 1
3 2 2 1 2

Puzzle 6

3
1
1
3
4
2
3
1
1
1
2
2
1
1
4
2
3
1
1
4
3
4
1
2
4
4
1
1
1
2
3
2
3
2
8
2
6
2
2
1
2
1
3
2
1
2
6
2
1
1
1
1
3
1
2
1
5
2
2
1
1
3
5
1
1
6
3
2
1
1
2
2
1
2
7
3
2
6
3
3
3
1
1
1
1
1
1
2
3
1
4
2
1
1
2
6
1
2
4
1
2 1 1 2 1 1
2 2 1 1 6
1 1 4 2 5
1 2 3 2 1 1
3 1 1 1 2 3
2 1 2 2 1 1 1
1 5 7
6 7 1
2 2 2 1 1 1
1 1 2 2 4 1
1 4 1 1 2
1 1 2 1 3 2 2
7 2 5
1 7 5
6 6 3
1 6 1 2
1 5 1 2 1 2
1 1 3 5 1
1 1 4 1 5
1 3 2 2 1 1

Solutions

Solution 1

2
1
3
7
4
4
2
1
1
2
2
3
6
1
5
1
1
1
6
8
1
5
1
1
1
1
1
4
3
2
2
3
1
1
7
8
3
1
2
1
3
2
2
1
2
1
1
3
3
4
2
1
1
2
2
1
4
1
1
2
3
1
7
2
3
2
2
3
2
3
2
3
4
11
1
1
2
2
2
1
3
1
4
3
1
4
1
1
1
2
1
2
2
1
1
2
1
14
1
1
1 1 5 1 1 1 2
5 2 1 6
9 1 1 1 1 1
1 2 6 2 3
5 2 4 1
3 1 3 1 4 2
5 1 2 1 3
2 1 1 2 6 1
2 1 3 1 4 3
1 2 2 1 5
2 1 2 1 1 4 1
2 6 5 1
1 2 4 2 2
1 1 1 1 2 1 1
9 4 3
1 4 2 5 1
6 1 2 5
1 3 1 1 3 1 1
4 5 2 3
1 1 1 3 2 2

Solution 2

7
1
2
2
1
1
5
4
2
1
1
5
2
3
3
1
4
3
1
1
1
1
8
1
1
4
1
1
2
2
1
2
1
1
1
1
2
2
1
1
1
1
1
1
1
5
2
1
1
7
2
4
2
1
1
1
4
1
1
6
5
2
1
3
1
1
1
1
3
4
4
1
2
1
3
1
1
2
1
2
2
2
8
1
1
6
2
3
1
1
3
2
1
2
2
3
5
4
1
1
3 1 4 2 2 2
1 1 1 1 1 2 2 1
4 2 1 2 1 1
4 2 1 1 5
4 1 1 2 4
2 2 1 1 1 1 3
3 7 1 1
1 3 3 1 1
2 1 1 2 4
3 2 3 5
3 1 2 1 1
3 1 2 2 1 2
2 1 4 1
2 2 1 1 2 6
3 2 6 4
3 4 1
1 1 1 2 1 2 1 1
2 2 4 3 1
1 1 1 2 3
3 2 2 1 2 1

Solution 3

2
1
4
1
1
1
1
2
4
6
1
5
1
2
4
1
1
1
1
1
1
2
2
3
2
3
2
2
1
12
1
1
1
1
1
1
5
1
8
1
3
3
4
1
1
1
5
1
5
1
5
2
1
3
2
1
1
1
6
2
1
1
2
1
3
4
2
2
1
1
4
2
1
1
2
1
1
1
2
2
2
1
1
4
2
2
1
4
4
3
2
6
4
1
2
4
2
1
6
1
1
1
2
3
3
1
1 2 3 2 4
3 2 5 1 3
8 2 2 1
1 2 3 4
4 3 4 1 1 1
2 3 1 1 4
2 4 1 3 4
6 1 5 2 1
1 1 7 4
2 5 1 1
1 2 1 1 1 1 1
2 2 1 1 6
4 1 4 5
1 3 1 1 4
1 1 6 2 4
1 2 5 1 2
1 2 6 1 1 1
3 5 2 3 1
3 2 1 2 1
1 1 3 3 3

Solution 4

2
1
1
1
4
2
1
2
5
2
4
1
1
1
3
2
2
3
1
2
1
1
2
1
1
1
1
1
1
2
1
2
2
1
3
1
4
1
2
3
2
2
3
3
1
5
6
2
1
3
3
5
2
2
1
1
4
1
3
2
1
1
2
1
1
1
3
3
5
3
2
1
1
1
3
6
1
1
5
2
3
4
2
3
2
4
5
6
1
1
6
1
3
1
2
3
1
5
4
2
1 2 1 1 1 1 3 1
5 1 1 1 1 4
1 1 5 1 1 3
2 1 2 4
3 1 3 6
1 1 1 1 2 1 4
1 1 1 7 1
1 2 1 5 1 1
3 3 2 3 1 1
2 3 1 3 3
2 2 1 1 1 1 1
1 1 1 1 1 1
1 3 2 7
3 2 1 4 2
1 1 3 2 2
3 5 1 2 1
4 2 1 1 3 2
1 2 1 2 6
1 9 5
1 6 2 2

Solution 5

2
1
2
3
2
1
1
1
1
6
1
1
1
6
2
1
2
1
2
3
2
3
3
2
1
3
1
1
1
2
1
6
3
1
1
2
1
1
1
1
2
5
2
1
1
1
2
2
3
5
7
6
3
5
2
4
1
1
1
2
1
2
5
1
1
1
3
1
1
5
1
1
2
2
1
1
1
1
2
2
1
1
3
2
1
4
1
2
1
1
5
1
2
4
1
3
3
1
1
1
1
1
1
4
1
1
1
1
4
1 1 4 4 1 3
2 2 5 2 1 1
1 3 2 2 1
3 1 1 1
1 7 1 1 2
1 3 3 1 3 1
3 2 2 2 2
2 1 6 1 1
1 1 4 3 1
1 2 2 2 1 2
4 3 2 3
9 1 1
2 5 3 1
4 1 1 1 4
7 4 3
1 1 1 1 3 2
2 3 1 7 1
1 2 3 1 1 3 1
1 1 2 2 1 1 1 1
3 2 2 1 2

Solution 6

3
1
1
3
4
2
3
1
1
1
2
2
1
1
4
2
3
1
1
4
3
4
1
2
4
4
1
1
1
2
3
2
3
2
8
2
6
2
2
1
2
1
3
2
1
2
6
2
1
1
1
1
3
1
2
1
5
2
2
1
1
3
5
1
1
6
3
2
1
1
2
2
1
2
7
3
2
6
3
3
3
1
1
1
1
1
1
2
3
1
4
2
1
1
2
6
1
2
4
1
2 1 1 2 1 1
2 2 1 1 6
1 1 4 2 5
1 2 3 2 1 1
3 1 1 1 2 3
2 1 2 2 1 1 1
1 5 7
6 7 1
2 2 2 1 1 1
1 1 2 2 4 1
1 4 1 1 2
1 1 2 1 3 2 2
7 2 5
1 7 5
6 6 3
1 6 1 2
1 5 1 2 1 2
1 1 3 5 1
1 1 4 1 5
1 3 2 2 1 1

The 20×20 is the nonogram marathon: 400 cells and clue runs that fill the margin. The key is staying systematic — sweep the rows, then the columns, and never guess. One grid can fill an entire evening. On medium, you’ll alternate between rows and columns more often: deductions come in small touches, and ✕ marks become as precious as filled cells.

Printing tip: letter or A4, portrait, default margins. Tick “Include solutions” to get the answers on a second page — handy to fold away for later. Prefer a screen to a pencil? The same format is playable online here, and the basics live in the beginner guide.