Support Dojo & FAQ
Have a question about the 45 Rule, found a bug, or need help recovering your belt rank? Weβre here to help.
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Send us an email directly or use our community channel. We respond within 24 hours.
Frequently Asked Questions
What is the Rule of 45?
In standard Sudoku, every row, column, and 3Γ3 box must contain digits 1 through 9 exactly once. The sum of 1+2+3+4+5+6+7+8+9 is always 45. In Killer Sudoku, you can add up known cages inside a row and subtract from 45 to find the exact value of any cell sticking out.
How does the Easy 4x4 Mini-Grid work?
For beginners learning the dojo ropes, we offer a 4Γ4 Mini-Grid mode. In 4Γ4, digits 1 through 4 are used, and every row, column, and 2Γ2 box sums to exactly 10 (1+2+3+4). It lets you build intuition with cage sums without feeling overwhelmed.
How do I earn the Black Belt?
Advance through the 7-Lesson Technique Dojo, accumulate 3,500 XP, and conquer the "Trial by Fire" β an Expert puzzle solved with zero coach hints.
Can I switch languages or play offline?
Yes! Go to Settings in the app to toggle between English and Urdu (Ψ§Ψ±Ψ―Ω) with full Right-to-Left (RTL) support. The app is 100% playable offline with local Hive database persistence.