BECKNERWEB · PLAYING GUIDE

Your evening at the table

Authority and scope

Mattel classic UNO, 2008, product 41940, instruction sheet 41940-0923: publisher’s instructions. The English classic game is the sole rules authority. Its optional house rules and alternate scoring are omitted. There are no customizable cards, stacking, jump-in, seven–zero swaps, or automatic human declarations.

Rules checklist

108 cards: each color has one 0, two each of 1–9, and two each of Skip, Reverse, Draw Two; four Wild and four Wild Draw Four.
Deal seven. Highest-number draw selects dealer; symbols count zero. Left neighbor starts.
Opening: number plays normally; Skip skips first player; Draw Two penalizes and skips; Reverse starts dealer, reversed; Wild lets first player choose; Draw Four returns to deck.
Match color, number, or symbol. Wild chooses color. Draw once when unable or unwilling; only that new card may be played, otherwise keep it.
Skip loses a turn; Reverse reverses; Draw Two draws two and skips.
Draw Four requires no card of the prior active color. Successful challenge penalizes offender four; unsuccessful challenge penalizes challenger six.
Declare UNO reaching one card. Catch before next turn begins: draw two.
Resolve final draw penalties before scoring. Numbers score face value; colored actions 20; Wilds 50. Round winner collects opponents’ points; first to 500 wins.
Recycle discards when the draw pile empties.

Explicit implementation interpretations

The following fill gaps in this particular instruction sheet; they are not additional quotations or claims of publisher-specified behavior.

Two players: a played Reverse acts like Skip, giving its player another turn. Draw penalties skip the recipient. An opening Reverse follows the edition’s separate opening instruction: dealer starts. This sheet does not explicitly specify the special two-player Reverse convention.
Dealer ties and new rounds: tied highest seats redraw until one dealer remains. All selection cards return before a fresh shuffle. Dealer selection repeats each round.
Digital turn boundary: pressing Play with a complete card/color choice, Draw, opening-color confirmation, Accept, or Challenge starts the next turn. That accepted action closes the previous UNO catch window. Selecting a card, opening a color picker, viewing a hand, refreshing, polling, hints, or animations do not close it. Automatic skips and mandatory Draw Two effects are resolved inside the card-play transaction; the next decision-capable player is the next turn boundary.
Declaration: with two cards, press UNO! to arm a declaration. It accompanies the next committed play that leaves one card. It is not a separate early declaration. If forgotten, Call UNO now can correct it until someone catches or starts the next turn. Competing catches and calls use action order, not animation timing.
Challenges: the penalized next player alone can challenge. A successful challenge preserves that player’s ordinary turn. Acceptance or failure loses their turn. The selected new color stays active in every outcome. The evidence is the offender’s hand immediately before playing, including the Draw Four; the engine compares against the prior active color. Evidence is privately displayed after a challenge, until the next accepted action. A final Draw Four must resolve before a winner is declared.
Recycling: retain the visible top discard and chosen color; shuffle all older discards. If nothing is drawable because every other card is held, draw only what exists and let play proceed. Do not create extra cards.

Controls and privacy

Select a highlighted card, then Play selected. Wilds ask for a color before any commitment; Cancel leaves your hand intact. A Draw Four remains selectable when bluffing is possible, with a warning. An ordinary matching card you already held cannot be played after drawing. A playable new card remains highlighted until you play or keep it.

Use Tab to focus controls, Enter or Space to activate, and arrow keys/Home/End to move through the hand. Horizontal scrolling keeps large hands readable on phones. Sort changes presentation only. Scores and recent events expand below your hand.

Pass & play covers each incoming human hand until Show my hand is pressed. Catch buttons are available on the covered screen without exposing a hand. Shared-device privacy protects normal play, not against someone inspecting browser storage or developer tools. Online hands are filtered on the server.

Computer policy and hints

Easy varies ordinary legal plays. Medium favors color balance and shedding action points. Hard adds stronger point shedding and pressure on a next opponent with few cards. These are heuristics, not an unbeatable search. Computers never bluff Draw Four; they may challenge with a disclosed random policy (Hard 1 in 5, others 1 in 10). They declare UNO with their plays and catch missed declarations only after a thinking delay. Local delay is adjustable from 1.2 to 3.5 seconds. Online actions wait at least 1.8 seconds and are driven by the next two-second participant poll. There is no instant AI catch.

AI receives only its own hand, public counts, active color, and public phase. Hint uses that same restricted interface and explains its preference; it does not read opponents’ cards or future draws.

Formats, saves, and online pacing

Quick round ends after one player wins a round and required penalties resolve. Scored match retains points and offers Deal next round until a player reaches 500. Rematch returns online players to readiness in the lobby; local rematch redeals the same seats and format.

Local state saves after every accepted action, including pending decisions and pile order. Resume saved game restores it; shared-device games resume covered. Do not clear browser storage if you want to resume. Local storage is not encrypted. Private online games persist in SQL and use a browser-held seat token: protect the browser profile and do not share that token.

Any connected participant can drive paced computer turns. When nobody is connected, the game pauses until someone returns. A disconnected human retains their seat and their turn; no timeout forces a play or silently installs a computer. Players can wait or start a new room. In an unstarted lobby, another active participant can inherit host authority after the host has been absent for 30 seconds. Rooms expire after 30 days without activity.

Sound starts only after a tap, click, or keypress. Settings remembers volume, motion, animation speed, and local thinking delay. All card art is original CSS and all tones are synthesized locally. There are no remote assets.