About Star Battle Online
Dedicated to building the cleanest, most accessible, and mathematically pure Star Battle logic puzzle experience on the web.
1. Our Mission
Star Battle Online was founded by passionate logic puzzle enthusiasts and software engineers with a clear goal: to provide an ad-light, distraction-free environment for puzzle solvers of all skill levels. Unlike mobile apps clogged with paywalls, energy limits, and intrusive full-screen popups, Star Battle Online runs natively in any modern browser on desktop, tablet, or smartphone—with zero registration, zero tracking cookies, and instant playability.
2. What is Star Battle?
Star Battle (frequently referred to in North America as Two Not Touch, and related to logic variants like Queens) is a beloved pen-and-paper logic grid puzzle invented by Hans Eendebak in 2003 for the 1st World Puzzle Championship. Players place a set number of stars (typically 1 or 2) into each row, column, and outlined region, subject to the defining rule that no two stars may touch, even diagonally.
3. 100% Algorithmic Originality & Mathematical Proof
Every single puzzle featured in our daily challenges and practice modes is algorithmically synthesized from scratch using custom computational geometry and constrained backtracking algorithms:
- Voronoi Region Partitioning: Custom seed generation creates aesthetically balanced, organically shaped contiguous puzzle territories.
- Strict Uniqueness Verification: Every board configuration is exhaustively solved using a high-performance lookahead pruning engine. A puzzle is published only if our solver proves that it possesses strictly one unique solution. There are never ambiguous guesses or multiple valid outcomes.
- Pure Deductive Solvability: Our puzzles are designed to be solved via step-by-step logic, row/column pigeonhole counting, and spatial elimination, requiring no blind trial-and-error guessing.
4. Independent & Free
Star Battle Online is an independent web project. We believe high-quality logic games should be freely accessible to students, seniors, competitive solvers, and casual thinkers worldwide.
5. Get in Touch
We love hearing from our players! Whether you have feedback on board controls, found an interesting strategy, or have questions regarding educational use:
- Email: support@starbattleonline.com
- Feedback & Inquiries: Visit our Contact Page