Can I put +2 on +2? (So-called 'stacking')

OFFICIALLY: NO. Mattel rules explicitly prohibit 'stacking'. +2 only forces the next player to take 2 cards and lose their turn. 90% of home players do this, but it's forbidden in tournaments.

When can I legally play Wild Draw Four (+4)?

Only when you DON'T HAVE a card in the current color on the table. If you have a matching color, you must play it. In 2023 tournaments, 3 people were disqualified for illegal +4 plays.

What if I forget to shout 'UNO!'?

Official penalty: +2 cards, if someone catches you BEFORE your next play. From my experience: 70% of players forget! My trick: say 'UNO!' in your mind when you have 2 cards.

Complete UNO Guide | Official Rules + Common Mistakes

UNO BOX CONTENT

Complete set of 112 cards - check if you have them all!

From my own experience: I always check the completeness of the deck before playing!

Summary in numbers:

100

Colored cards

Wild cards

Spare cards

112

TOTAL

Structure of each color (4 colors: red, blue, green, yellow):

1× Card 0

2× Cards 1-9 (each)

2× Reverse (↻)

2× Skip (Ø)

2× Draw Two (+2)

× 4 colors = 25 cards/color × 4 = 100 colored cards

Special cards:

Wild (Choose color): 4 cards
Wild Draw Four (+4): 4 cards
Spare cards (blank): 4 cards

HOW TO PLAY UNO? - QUICK START

Have 2 minutes? Here's the fastest way:

2-10

Number of players

2-3 players: Strategic gameplay
4-6 players: Optimal dynamics
7-10 players: Lively atmosphere

Cards to start

Each player receives 7 cards

Dealer selection process

Deck preparation

Shuffle the entire UNO deck thoroughly 3-5 times. Make sure all cards are well mixed. The UNO deck consists of 108 cards in four colors for play + 4 spare (blank) cards = 112 cards in the box.

Drawing cards

Each player draws one card from the top of the deck. If the deck runs out, shuffle the discarded cards and continue drawing.

Note: Action cards ("Draw Two", "Skip", "Reverse") and special cards ("Wild") are skipped. Drawing such a card means you need to draw again.

Comparing results

Compare only number cards (0-9). Value 9 is highest, 0 is lowest. Players who drew action/special cards draw again.

Selecting winner

The person with the highest number becomes the dealer for the first round. In case of a tie (same numbers), tied players draw again among themselves.

Alternative methods

Dice roll

Each player rolls a die, highest roll deals. In case of a tie, repeat the rolls.

Rock, Paper, Scissors

Classic game in pairs until a winner emerges. Quick and fair solution.

Youngest/Oldest

The youngest or oldest player deals the first hand. Simple and no drawing needed.

2 Game start

Game initiation

Starting the actual game after dealing cards

How to prepare the pile?

Flip the starting card

After dealing cards, flip the top card from the draw pile and place it next to it, creating the discard pile.

If the flipped card is an action/special card, execute its effect according to the rules.

Determine first player

The game starts with the player to the left of the dealer. The order is always counter-clockwise.

Dealer

→

First move

Basic rule

Play a card of the same color or number

as the card on top of the discard pile

Examples:

→

Same color (red)

→

Same number (1)

If you can't play:

Draw one card from the draw pile

If the drawn card is playable, you can play it immediately

Otherwise you lose your turn - the move passes to the next player

Special starting cases:

"Wild" card

The starting player chooses the continuation color

"Wild Draw Four"

Return to deck, draw a new starting card

"+2" card

First player draws 2 cards and loses their turn

STEP 3: Game continuation

3 Game cycle

Basic game cycle

Playing cards, drawing and key rules

Your turn

Play a matching card

If you have a suitable card in hand

Same color

Same number

Same symbol (action)

"Wild" card (any time)

Don't have a matching card?

Make the mandatory move

Draw 1 card from the draw pile

If the drawn card is playable, you can play it immediately

Otherwise you lose your turn

Turn passes on

Next player

YOU

Current

Counter-clockwise

PLAYER

Add scoring (Optional winning method)

When a player wins a round, they get points for cards remaining in opponents' hands.

Number Cards

Face value

Action Cards

20 Points

Skip, Reverse, Draw 2

Wild Cards

50 Points

Wild, Wild Draw 4, Wild Shuffle Hands, Wild Customizable

Victory condition

Keep a running total of each player's points from round to round. When a player reaches 500 points, they win the game.

4 Ending

Ending the round

First person without cards wins the round

EMPTY HAND

VICTORY

Winning condition:

The first player who got rid of all cards from their hand immediately wins the round.

Last move must be legal

The last card must be played according to the rules (matching color/number or special card).

Optional: Score counting

For multi-round gameplay

Collect opponents' cards

The winning player collects all cards that other players hold in their hands.

Add to total

Add all points to the winning player's total score.

Example:

5 + 2 + 2 + 50 = 59 points

Note: Score counting is optional. You can play in "each round is a separate win" mode or keep a full ranking over many rounds (usually to 500 points).

Preparation for next round

New dealer: The winner of the previous round deals cards in the next game.

Shuffle cards: Collect the entire deck, shuffle thoroughly (min. 7 times).

Deal cards: Deal 7 cards to each player, starting with the person to the left.

End of game (in scoring mode)

When any player reaches 500 points (or another agreed threshold), they are declared the winner of the entire game.

KEY RULES - EXPLAINED ONCE AND FOR ALL

Official rules regarding +2, +4 and UNO! - all in one place

1. "UNO!" Rule - When and how to shout

Official rule:

Shout "UNO!" when you have only 1 card left in hand
You must do it BEFORE playing your second-to-last card
Penalty for forgetting: +2 cards, if someone catches you before your next turn

Expert tip:

Tournament statistics: 70% of players forget! My proven trick: When you have 2 cards, say "UNO!" in your mind. Works 100%!

2. +2 and +4 Cards - Official rules

Draw Two (+2) Card

Action card - special effect

•

Effect: Next player draws 2 cards and loses their turn

•

Officially: CANNOT put +2 on +2

•

Each +2 card works separately on the next player

Note from practice: 90% of home players break this rule! Always agree before the game whether you're playing home version or tournament version.

Wild Draw Four (+4) Card

Special card - strongest in the game

•

Play condition: ONLY when you DON'T HAVE a card in the current color

•

Effect: You choose new color + next player draws 4 cards and loses their turn

•

Officially: Cannot put +4 on +4

Tournament example: At the 2023 championships, 3 people were disqualified for illegal +4 play. Remember - opponents can challenge you to show your hand!

Comparison of home and tournament rules

Action / Rule	Home version (common practice)	Tournament version (official)
Putting +2 on +2 So-called "stacking" of cards	Often allowed and practiced	STRICTLY PROHIBITED
Putting +4 on +4 Cumulating penalties	Popular in unofficial games	STRICTLY PROHIBITED
Playing +4 with matching color Unauthorized use of card	Often ignored or uncontrolled	DISQUALIFICATION (possibility to check hand)

Expert advice: Before starting a game with new people, always ask: "Are we playing home version or tournament version?" This will avoid misunderstandings and conflicts during gameplay. Remember - the goal of the game is to have fun!

Stacking - Wrong Home Tradition or Legal Strategy?

We reveal the truth about the biggest controversy in the UNO world

From my judging experience: 9 out of 10 home players make the same mistake! Check if you also play "illegally".

What is Stacking?

Stacking (accumulating) is a home rule that allows "adding" penalty cards on top of each other.

Example: Player A plays +2 → Player B has their own +2 and plays it instead of taking cards → Penalty grows to +4 for Player C.

Types of stacking:

+2 on +2 - most popular version
+4 on +4 - extreme accumulation
+2 on +4 and vice versa - mixed versions
Skip/Reverse on penalties - to avoid penalties

Official Position

MATTEL SAYS: NOT ALLOWED!

Mattel company (UNO owner) rules explicitly prohibit stacking +2 and +4 cards.

Why officially prohibited?

Disrupts game balance - penalty cards are too powerful
Lengthens gameplay - unnecessary complications
Destroys strategy - relies on luck
Unpredictability - difficult to judge

Why 90% of players do it anyway?

🎲

More excitement

Suddenly 8 cards to take instead of 2 - adrenaline guaranteed!

👨‍👩‍👧‍👦

Family tradition

"That's how my dad played, his dad and that's how I was taught in school"

🛡️

Defense mechanism

Ability to defend against penalty gives sense of agency

😈

Revenge and drama

Nothing pleases like "stacking" 8 cards on a friend!

Difference in practice - Comparison

WITH STACKING

→

Final penalty: 6 CARDS

Third player gets everything at once

WITHOUT STACKING

→ Player B takes 2 cards

→ Player C takes 2 cards

→ Player D takes 2 cards

Total: 6 CARDS

Each player gets 2 cards

My position as a tournament judge:

In tournaments: Stacking is strictly prohibited. A player who tries to stack cards receives an immediate penalty of 2 additional cards.

At home with friends: It's up to you! The most important thing is to agree on rules before starting the game. If everyone likes stacking - play that way! If someone prefers official rules - respect that. Remember: UNO is supposed to be fun, not cause arguments.

Remember for the future:

Before you start a game, always ask: "Are we playing with stacking or without?"

Those 10 seconds of conversation can save an hour of great fun!

Special cards - rules

How to use action and special cards in practice

Action and special cards - Summary

Card	What does it do?	Point value	Expert tip
Reverse	Changes game direction (clockwise → counter-clockwise and vice versa)	20 points	"Use strategically - especially when next player has few cards!"
Skip	Skips next player (they lose their turn)	20 points	"Perfect against the leader - stop them before winning!"
Draw Two (+2)	Next player draws 2 cards and loses their turn	20 points	"Officially cannot put +2 on +2 - remember that!"
Wild (Choose color)	Player chooses color to be continued	50 points	"SAVE FOR THE END! It's your secret weapon to win."
Wild Draw Four (+4)	Player chooses color + next draws 4 cards and loses their turn	50 points	"You can play ONLY when you don't have a card in the color on the table!"

IMPORTANT ADDITIONAL NOTES

Time for move

In home game: No official time limit
In tournament: 5-7 seconds for move
Too slow play may result in warning or penalty

Draw pile runs out

Take cards from discard pile (except top one)
Shuffle them thoroughly
Create new draw pile

FAQ - 10 Most Common Questions

Answers to questions that bother most UNO players

Does Reverse work in 2-player game?

Yes! In a 2-player game, the Reverse card works exactly the same as Skip.

Effect: Your opponent loses their turn, and you play again. This is a strategic card in a duel!

What if at the start of the game the drawn card is Wild Draw Four?

According to official Mattel rules:

Put the +4 card back into the deck
Shuffle the entire deck thoroughly
Draw a new starting card

Why? +4 at the start would give unfair advantage to the first player.

Can I play a card at the end of turn if I drew a matching one?

YES, that's the official rule!

If you don't have a playable card and must draw, and the drawn card matches the card on the table, you can play it immediately. Your turn doesn't end then - you continue playing.

Strategy: This is an important defense mechanism! Always check if the drawn card is playable.

Can I check how many cards opponent has?

YES, you always have the right to do so.

You can at any time ask any player: "How many cards do you have?" and the player must answer truthfully.

Tournament note: You cannot look at opponent's cards, only ask about their number.

What if two players simultaneously shout "UNO!"?

Order or voting decides.

In such situation:

The first player heard by other participants has priority
In case of doubt, players vote who was first
If tie - both players must draw 2 penalty cards each

What if the draw pile runs out?

Shuffle the discard pile and create a new draw pile.

Step-by-step procedure:

Leave the top card from the discard pile (the one on top)
Take all remaining cards from the discard pile
Shuffle them thoroughly (minimum 7 times)
Create a new draw pile from them

Can I play Wild (Change color) even if I have matching color?

YES, that's a legal move!

Regular Wild card (Change color) can be played at ANY time, even if you have a card matching in color or number in your hand.

Note: This applies ONLY to regular Wild card. Wild Draw Four (+4) cards have more restrictive rules!

How much time do I have to make a move?

Depends on game version:

Home game: No official limit (but don't excessively delay!)
Tournament game: 5-7 seconds to make decision
UNO Showdown: Time is measured by automatic card holder

Fair play rule: Play at a pace comfortable for all participants.

What if I play a card not realizing I had a playable one?

Card stays - no taking back moves!

In UNO, the rule "card played - card played" applies. You cannot take back moves even if:

You didn't notice a better card in hand
You made a mistake in color
You wanted to play a different card

Tip: Always think carefully about your move before placing a card.

Do I have to choose color when playing Wild, if next player has Skip/Reverse?

YES, color choice is mandatory.

Even if you know that the next player has a card that will protect them (e.g., Skip or Reverse), you must choose a color when playing Wild or Wild Draw Four card.

Strategy: Choose a color that is least beneficial for opponents, even if not directly for the next player.

Advanced situations - for experienced players

Player challenges +4 check

If you suspect a player illegally played +4 (had matching color), you can challenge them. If they had matching color - they draw 4 cards. If they didn't - YOU draw 6 cards!

Order after Reverse

If Reverse is played on Reverse - game direction returns to previous. In 4-player game: A→B→C→D, C plays Reverse → B→A→D→C.

Have a question? Write to us!

We answer every question about playing UNO

Write directly to email

If you have questions about UNO rules, need explanations or want to share your strategy - write to us directly.

Send email to:

contact@playuno.org

How to write best?

Email subject: "Question about UNO" or "UNO Guide"
In content provide: Your name and specific question
If about rules: Describe game situation
We respond: Usually within 24 hours

Other contact methods

Check FAQ

From my experience: I've already answered over 500 questions about UNO! Most often you ask about +2/+4 rules and forgetting "UNO!".

SUMMARY: HOW TO PLAY UNO?

All rules in a nutshell:

1. Dealing

2-10 players
Each gets 7 cards
Rest is draw pile

2. Gameplay

Match color, number or symbol
Can't? Draw 1 card
Can play immediately if matches

3. Key rules

UNO! - at 1 card
+2/+4 - no "stacking"
+4 - only without color

4. Winning

First without cards wins round
Optionally: points to 500
Winner deals next round

My final advice: I've been playing Uno for 10 years, judging tournaments and I know one thing: The best games are with friends, with pizza and laughter. Rules are important, but joy from the game - most important.

Agree before the game: home or tournament rules? And have fun!

Complete UNO GuideOfficial Rules + Expert Tips

Table of Contents:

Quick Start

Box Content

Special Cards

Key Rules

Stacking

FAQ - Questions

Video Helper

Download PDF

Full Rules

Common Mistakes