Sudoku 16x16 Teacher

Sudoku, the classic puzzle — but bigger. Play the 9×9 you know and love, or step up to a 16×16 hex grid using 0–9 and A–F. That's 256 squares to solve — a fresh challenge even for seasoned solvers. Hints that teach, not just tell. A hint never just hands you the answer. It highlights the pattern on your board, names the technique — Standard Single, Hidden Single, Pointing Pair, Standard Pair, X-Wing, Swordfish, and more — and explains in plain words why it works and which notes to remove. Use a few hints and you'll start spotting the patterns yourself. Made for iPhone Duo. The board adapts as the Duo folds, docks, and opens into laptop mode, so the puzzle always sits right where your hands are. Four difficulties, from Easy to Very Hard. Every puzzle except Very Hard is solvable by pure logic — no guessing required. Everything you need to play. Take notes, let AI Notes fill in every…