Learn to solve combinatorial puzzles
step by step
Learn puzzle-solving online with guided practice, progressive difficulty, and teaching-first hints. No download required.
2×2 — Learn the basics
How to Play
Click a tile next to the empty space to slide it. Arrange all numbers in order (1, 2, 3...) to solve the puzzle.
Progressive Difficulty
Start with a simple 2×2 grid and work your way up to challenging 4×4 puzzles and beyond.
Teaching Hints
When you get stuck, Hedron is designed to teach the next idea, not just reveal the answer.
No Download Needed
Start instantly in your browser on desktop or mobile and share the same puzzle experience anywhere.
How Hedron Works
Start Simple
Begin with a 2×2 puzzle to learn the core mechanics of sliding tiles.
Build Skills
Move to 3×3 and learn strategies that apply to all combinatorial puzzles.
Master Complexity
Take on 4×4+ puzzles using the intuition you've developed.
Why Hedron
Built for learning, not just passing time
Hedron sits between a casual browser game and a full puzzle course. The experience is designed for curious players, students, and educators who want to build real solving intuition through approachable challenges and clear progression.