A daily logic challenge inspired by the classic N-Queens problem! Place queens on the grid so no two can attack each other, and conquer 100+ levels across 6 difficulty tiers.
Place queens on the grid so that no two queens share the same row, column, or diagonal — just like in chess! Each puzzle has preset queens already placed on the board, and number hints showing how many queens surround each cell. Your goal is to figure out where all remaining queens belong. Grid sizes range from 4×4 (Mini) to 8×8 (Expert).
Queens Puzzle offers 6 difficulty tiers across 600+ puzzles:
The Level Map is your journey through 100+ sequential levels along a winding path. Each level corresponds to a puzzle of increasing difficulty. Complete levels to progress along the map and unlock new challenges. You can also play 3 daily challenges for additional variety.
Queens Puzzle offers several tools to assist you:
Complete at least one daily puzzle each day to build your streak. Your streak shows how many consecutive days you've played. Miss a day and your streak resets. Check your statistics to see your current and best streaks.
Yes! All puzzles are available offline. You can play anytime, anywhere without an internet connection. An internet connection is only needed for optional cloud backup of your game records.
No. Queens Puzzle requires no registration or sign-in. You can start playing immediately. All your progress is stored locally on your device.
Yes! You can toggle haptic feedback in the settings. The app also supports multiple color themes to match your personal style.
Your in-app progress and statistics will be lost since all data is stored locally on your device. If you have cloud backup enabled, your game records can be restored after reinstalling. Consider this before uninstalling.
Last updated: March 11, 2026
Queens Puzzle is designed with a privacy-first approach. We collect minimal information:
We do not collect:
All game data — including puzzle progress, level map progression, streak records, app preferences, and statistics — is stored locally on your device using local storage and a local database. This data is not transmitted to any server unless you have cloud backup enabled.
Premium features are available through auto-renewable subscriptions (monthly or yearly). All payment processing is handled by Apple (App Store) or Google (Google Play). We do not collect or store any payment information. Subscription status is verified through the respective platform's purchase APIs.
Queens Puzzle does not knowingly collect personal information from children under the age of 13. The app does not require any personal information to function.
Since all game data is stored locally on your device, your data is protected by your device's built-in security features. Cloud-backed game records are stored securely in Firebase Firestore with anonymous authentication.
You can delete all local app data at any time by uninstalling the app from your device. All local data including progress and statistics will be removed. Cloud-backed data can be deleted by contacting us at info@phdev.dev.
We may update this Privacy Policy from time to time. Any changes will be reflected on this page with an updated "Last updated" date.
The app is provided "as is" without warranties of any kind, either express or implied. We are not liable for any damages arising from use of the app.