Walldoku

Rule the board like a castle strategist in Walldoku — a logic puzzle from the Sudoku family, wrapped in a sober medieval world of stone walls and corner towers.

Every board is divided by walls into sections. Each straight run of cells between walls must hold the numbers 1 up to its length, with no repeats — a run of three holds 1, 2, 3; a run of five holds 1 through 5. Read the walls, deduce what fits, and complete every castle.

Start in a tiny 3×3 keep and work your way up through 4×4, 5×5 and ever larger fortresses, all the way to sprawling 10×10 strongholds — plus premium 12×12, 15×15 and 20×20 castles for true masters.

FEATURES
• A fresh twist on Sudoku: walls divide the board into 1-to-N runs
• Hand-crafted medieval aesthetic — stone ramparts, towers and parchment
• Boards from 3×3 up to 10×10, plus premium 12/15/20 castles
• Two quick ways to place a number: tap a cell then a number, or a number then a cell
• Stuck? Ask for a Hint, or use Explain to reveal the logic behind the next move
• Relaxing and non-punitive — conflicts simply glow, nothing is ever lost
• Fully offline — play anywhere, no account needed
• Available in English, Spanish and Portuguese

Lower your drawbridge and start deducing. Can you complete every castle in Walldoku?