20x20 Nonogram
Difficulty: Advanced
Fill in the cells based on the numbers
11111
11111
121
1112111
112
1221
212
212
213111
111
2111
11221
211
2211
11111
124211
1132
1121
1111
51
1111
1111
211
1112
1121
11
111121
41132
11141
1111
121
21121
1111
2413
212111
31321
113
111
1111
11111
Tip: Right-click to mark cells with X
20x20 - Expert Challenge
20x20 grids are for experienced solvers who enjoy complex challenges. These puzzles require exceptional focus and advanced problem-solving skills.
Key Features
- • Intricate pattern combinations
- • Long solving sequences
- • Tests pattern recognition mastery
- • Requires excellent concentration
Solving Tips
- • Divide the grid into manageable sections
- • Use a systematic solving approach
- • Take breaks to maintain focus
- • Verify your progress frequently