Sudoku Dojo: Logic Mastery

A pure solving environment designed to help you master Sudoku.

Stop guessing and start learning. Powered by a custom engine utilizing 60+ human logic patterns, this offline companion delivers perfectly calibrated challenges without relying on guesswork.

🎓 Learn How to Solve
Our built-in Sudoku solver does more than just reveal the answer; it teaches you the underlying logic. If you get stuck, our 3-tier hint system gently guides you forward:
• The Hint: Tells you exactly what the next available technique is.
• The Focus: Narrows down the search area and provides context.
• The Reveal: Highlights the exact pattern on the board and explains the logic so you learn the strategy as you go.

🧠 Advanced Sudoku Techniques
Transition from a beginner to an expert with our built-in library of fully documented techniques. Read detailed explanations paired with interactive visual examples that highlight pattern zones, candidates, and complex chain links.

Our calibrated levels guide you through a smooth progression based on real solving data. Beginners can build a strong foundation by practicing basics like Naked and Hidden Singles or Pairs. As your skills progress, our solver teaches you to spot intermediate and advanced patterns, such as X-Wings, Swordfish, and Skyscrapers. For players looking to crack the most diabolical grids, we provide deep-dives into extreme logic, including Alternating Inference Chains (AIC), Almost Locked Sets (ALS), and Forcing Chains.

🔍 Analysis Tools
Equip yourself with tools designed for deep puzzle analysis:
• Custom Puzzle Import: Found a difficult puzzle in a newspaper? Input the grid, and our solver will rate its difficulty, verify if it has a unique solution, and generate a summary of the steps required to solve it.
• Coloring Mode: Use up to 9 distinct colors to highlight cells and candidates. This is essential for visualizing complex chains, grouped loops, or advanced subsets.
• Smart Assistance: Optional auto-notes, smart note clearing, and conflict highlighting let you focus on the logic, not the housekeeping.

🛡️ Clutter-Free & Uninterrupted
Sudoku is a game of deep concentration. Our modern interface stays out of your way.
• Lightweight & Offline: A battery-saving app that takes up virtually no space on your phone and works flawlessly without an internet connection.
• Flexible Input: Seamlessly switch between Cell-First, Digit-First (Sticky), or swipe selection for fluid gameplay.
• Stat Tracking: Monitor your activity heatmap, solve times, and performance metrics by difficulty.

Enjoy a professional-grade solver right in your pocket.