Sudoku Dojo: Logic Puzzles

Stop guessing and start solving. Master advanced logical patterns with step-by-step analysis, built-in learning tools, and a pure, uninterrupted environment.

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

🛡️ Lightweight, Offline & Ad-Free
Sudoku is a game of deep concentration, and our modern interface stays completely out of your way.
• No Interruptions: A completely ad-free experience with no monetization roadblocks.
• Battery & Storage Efficient: A tiny app size that takes up virtually no space on your device.
• Play Anywhere: Works flawlessly without an internet connection.

🎓 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 guides you forward:
• The Hint: Tells you exactly what the next available technique is.
• The Context: Narrows down the search area on the grid.
• 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.
• Beginners: Build a strong foundation by practicing basics like Naked and Hidden Singles or Pairs.
• Intermediate: Learn to spot advanced patterns, such as X-Wings, Swordfish, and Skyscrapers.
• Expert: Deep-dives into extreme logic, including Alternating Inference Chains (AIC), Almost Locked Sets (ALS), and Forcing Chains.

🔍 Deep 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 verify if it has a unique solution, rate its difficulty, and generate a step-by-step summary.
• Coloring Mode: Use up to 9 distinct colors to highlight cells and candidates. Essential for visualizing complex chains or advanced subsets.
• Smart Assistance: Optional auto-notes, smart note clearing, and conflict highlighting let you focus purely on the logic.
• Flexible Input: Seamlessly switch between Cell-First, Digit-First (Sticky), or swipe selection for fluid gameplay.

Track your progress with detailed stat tracking, monitor your activity heatmap, and carry a professional-grade logic solver in your pocket.