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Sudecku combines classic Sudoku with deck-building! Fill cells 1-9 without repeats in rows, columns, or 3×3 boxes. You start with a deck of number cards and special power cards that shuffle based on difficulty.
Your final score is based on points earned from solving puzzles and speed bonuses for faster completion. You earn points by filling cells correctly and lose points when using power cards or making mistakes. Keep your final score when you correctly complete the grid!
Create custom decks in Deck Management using points earned from solving puzzles. Buy power cards in the Card Store and select your deck before starting each game.
Simply drag number cards from your hand onto empty cells to fill them. You can hold up to 5 cards in your hand (upgradeable later).
Draw new cards by tapping the Deck. When your deck runs out, discarded cards return after a reshuffle cycle (costing points per card).
Power cards help in tricky situations but cost points to use. For example, a "Fill Cell" card costs 120 points but can automatically fill any empty cell correctly.
Power cards create deep strategic decisions beyond basic Sudoku logic. You'll need to balance immediate problem-solving against long-term point management. Do you spend points early to maintain momentum, or save them for truly difficult situations? Different power cards serve different strategic purposes: some help with validation and error-checking, others provide massive shortcuts by filling entire rows or columns, while some offer utility like reshuffling or returning cards to your hand. The key is learning when each card provides maximum value relative to its cost.
Replace incorrect cells by dragging a new number card over them. This costs points, so double-check your moves!
Tap placed numbers to mark uncertain placements with colors for easy tracking and organization.
Play the interactive "How to Play" tutorial in the game for a hands-on learning experience! The tutorial walks you through all the mechanics step-by-step.
We'd love to hear feedback or ideas for how to improve Sudecku. Please feel free to email us on hey@sudecku.com.