• 1–6 players. If 1 human, L and R join as computers. If 2 humans, L joins.
• Start each round with a shuffled 54‑card deck (two jokers), everyone gets 2 cards face down, total is a random 20–100, flow is clockwise, and a random starter is chosen.
• On your turn: Everyone else looks away; your two cards are revealed. Play a card, draw a replacement unless the deck is empty, choose from allowed options to change the total, and state the new total.
- Non‑Ace/Joker: you may add the card’s number (no points).
- If the total is a perfect n‑th power, you may take the n‑th root (earn n points).
- If the total is divisible by the card and the card is ≥4, you may divide (earn 1 point).
- Ace: add 1 plus the next deck card’s number, then reverse play. No points.
- Joker: set any total between 20 and 100. No points.
Total must change. Taking roots when the total is 1 is not allowed.
When the deck is empty, keep playing without drawing until all cards are played. That ends the round. The next round starts with the next player clockwise from the previous round’s starter. The game ends after each player has started one round.