📖 How a duel works
- Press ⚔️ Duel and wait for an opponent. If nobody shows up after a while, it cancels itself.
- You both get the same puzzle, picked by the server. Neither of you can choose it.
- No hints in a duel. The bar tells you how many cells your opponent has filled, nothing else: their board is never sent.
- Whoever submits a correct grid first wins. The server decides the result, not your browser.
💡 You can give up, and you can also keep playing after losing: the game still counts towards your streak and XP.
✏️ Notes mode: press the ✏️ key on the keypad (or the N key) to jot down candidates.