Authoritative multiplayer table. Choose your room capacity and enter the arena.
🛡️ Authoritative V2 Rules: Random seating, Draw-and-Pass, +2/+4 same-type stacking, 5-second UNO catch window, zero card leakage.
Select the colour the next player must match.
All rules are strictly authoritative, server-validated, and tamper-proof.
Exactly one legal card per turn matching the active colour, number, or action symbol.
Drawing draws exactly one card and immediately ends your turn. Passing performs the same action.
+2 stacks ONLY on +2 (+4, +6...). +4 stacks ONLY on +4 (+8, +12...). Cross-stacking between +2 and +4 is strictly forbidden.
Wild Draw Four can only be played when you hold no cards of the active colour (server-validated). Challenges disabled in V2.
When you have 1 card left, call UNO! If omitted, opponents have 5 seconds to catch you for a +2 penalty.
Seats and first turn are securely randomized via Web Crypto. You always see yourself at the bottom of the screen.
Playing a winning +2 or +4 settles the penalty on the next player before victory is confirmed.
