Sudoku — Brain Puzzles

Sudoku — Brain Puzzles brings the classic number game to your phone and tablet with a clean, modern look and gameplay that adapts to you. THREE BOARD SIZES • 4×4 (2×2 boxes, numbers 1–4) — perfect for first-timers and quick warm-ups • 6×6 (2×3 boxes, numbers 1–6) — a comfortable next step • 9×9 (3×3 boxes, numbers 1–9) — the original, timeless classic THREE DIFFICULTIES Easy, Medium and Hard for every board size. Clear Medium to unlock Hard, and rack up stars to chase that perfect 3-star run. DAILY CHALLENGE A fresh 9×9 medium puzzle every day, drawn deterministically from our puzzle pack — the same board for everyone, no internet required. Build a streak, climb the local records. SMART TOOLS • Pencil-mark Notes with a dedicated button, long-press mode and one-tap Auto that fills all candidates at once • Undo & Redo (up to 200 steps) so a stray tap never wrecks your run • Hint reveals a…