Hosn Obe is the free online version of the classic card game Thirty One — known across the world as 31, Blitz, Scat or Cadillac, and in German-speaking regions as Schwimmen, Knack or Schnauz. Each player gets three cards and three lives (matchsticks). The goal: get as close to 31 points as possible using cards of the same suit — whoever holds the lowest score at the end of the round loses a life, and the last player standing wins. Very easy to learn yet tactically deep, with short, fast-paced rounds. Play against the computer (offline/training) or online against thousands of real opponents — in public rooms, private rooms with friends, with in-app chat, emojis, scheduled tournaments and daily/weekly/monthly leaderboards. For 2 to 4 players, played with a 32-card deck.

Also known as: Thirty One, 31, Schwimmen, Knack, Schnauz (Schnautz), Blitz, Scat, Knaxn, Einunddreißig, Cadillac, Whammy, Juble, Eenendertigen / 31 Kaartspel (NL), Trentuno / 31 Gioco di Carte (IT), Treinta y Uno / 31 Juego de Cartas (ES), Fajer (HU)

Official site:hosnobe.com

Features

• 🎮 Free online card game.
• 🖥️ Training / solo vs. computer – practise against AI opponents.
• 🌍 Online multiplayer – join public games with players worldwide or create private rooms with friends.
• 💬 In-app chat & animated emojis.
• 🏅 Tournaments – register with tournament tickets, climb the tournament leaderboard, review tournament history; top finishers earn credit payouts.
• 🏆 Leaderboards – daily, weekly and monthly.
• 🪙 Credits / stakes – rooms at different stake levels (100 up to 10,000 credits).
• 🃏 Customisable card design – French/Skat deck, classic cards, or German-suited cards.
• ⚡ Easy to learn, short playtime – ideal for on-the-go.
• 📱 Smartphone & tablet compatible (iOS & Android).

How to play

1. Setup: 2–4 players, 32-card deck (7, 8, 9, 10, Jack, Queen, King, Ace in four suits). Each player gets 3 cards and 3 lives (matchsticks). Three cards lie face-up in the middle (the depot).
2. Goal: Keep your lives and be the last player standing. Within a round, avoid being the player with the lowest score.
3. Scoring (only same suit counts):
4. Only cards of the same suit (hearts, diamonds, spades, clubs) are added together.
5. Number cards: face value (7–10).
6. 10s & face cards (Jack, Queen, King): 10 points each.
7. Ace: 11 points.
8. Highest regular hand: 31 (e.g. Ace + a ten-value card of the same suit).
9. Special — three of a kind (e.g. three 8s, any suits): worth 30.5 points.
10. Blitz / Fire — three Aces: the strongest hand (value 33 internally) — ends the round instantly and makes every other player lose a life.
11. Your turn — choose one:
12. ♠️ Swap one card with a card in the middle.
13. ♥️ Swap all three of your cards with the three middle cards.
14. ♣️ Pass if you like your hand.
15. ♦️ Knock to start the final round once you believe you won't have the lowest hand.
16. First player's special move: put your hand in the middle and draw a fresh hand from the deck, or place three new cards from the deck into the middle.
17. Ending the round:
18. If a player reaches 31 points, the round ends immediately.
19. Or a player knocks — every other player then gets exactly one more turn before scores are revealed.
20. The player with the lowest score loses a life (matchstick).
21. Lose all lives and you're out; the last player remaining wins the game.

Frequently asked questions