Quantum Sudoku vs Tsuidoku

Quantum Sudoku offers a new and enjoyable way to solve traditional Sudoku Puzzles. Just find all the "Entangled Pairs" and the entire solution will unfold. What's an Entangled Pair? Two empty cells that have a mutually exclusive property. How to find them? Easy. Just pick any number, say #7. Then check each block: How many possible hiding places are there for my #7 in this block? If there are exactly two possible hiding places, then you found an Entangled Pair! Swipe across those cells to claim it. New to the Quantum Method? The Quickstart Video Tutorial, two practice levels and interactive Hints will get you up to speed in minutes.

Tsuidoku is a logic puzzle for players who have mastered classic Sudoku. The 9×9 grid remains, but a fourth constraint changes everything. THE 4 RULES Each row, column, and 3×3 region must contain the numbers 1 through 9 AND the 9 colors. The twist: each color must also contain all 9 numbers. The result: 81 unique number-color pairs. Place a "Red 5," and it cannot appear anywhere else. DAILY CHALLENGE A unique global grid every day—the same one for the whole world. Maintain your streak, earn monthly medals, and check the daily rankings. MASTER THE TECHNIQUES - Rainbow Technique: Track a single number across all nine colors. - Color Wheel: Track a single color across all nine numbers. Tap a cell to cycle through highlight modes and see the logic light up. PLAY TOGETHER Add friends, compare stats, and chat directly within the app. A detailed profile tracks your records across every difficulty level. Think you’ve mastered Sudoku? The real game starts here. Download now and create your first 81 perfect pairs.