HOW TO PLAY

Fill the 9×9 grid so every row, column, and 3×3 block contains digits 1–9 exactly once.

• 🔧 Hints — start with 0; earn one by clearing 3 units in a row, kitsune, or an ad (max 1 — no stacking)
• ⚠ Mistakes — first 3 wrong tiles need an ad continue; after that, every miss needs an ad (違う!)
• 📝 Notes — pencil marks in a fixed 3×3 mini-grid
• ↩️ Undo — reverse your last move
• 💡 Border — toggle yellow / cyan block borders
• STD / X — classic or Diagonal (X-Sudoku)
• Numeral toggle — shows the other system (default board is 漢; button reads 1-9 until you switch)
• 🦊 Cursed cells (Lv.5+) — fill correctly for a Kitsune hint burst
• ⚡ Combo — 3+ correct in a row → ACTIVATE for a free hint
• Bushido Honor — zero-mistake clears grant permanent +10% Brain Meter

SETTINGS

SFX Volume

LEADERBOARD