Hardest Sudoku Puzzle Instances
Abstract
The Sudoku dataset comprises 300 puzzles in total: 100 instances for the standard 9×9 size, 100 for 16×16, and 100 for 25×25. Each puzzle was deliberately selected based on documented extreme difficulty, minimal-clue characteristics, and recognized computational hardness, rather than random generation, to ensure meaningful stress-testing conditions.
Fields of Study & Subjects
Constraint Satisfaction and Optimization
Advanced Graph Theory Research
Artificial Intelligence in Games
Publication details
- Journal / source
- Zenodo (CERN European Organization for Nuclear Research)
- Publication date
- 4 March 2026
- Language
- EN
- Document type
- Dataset