Few cards in UNO spark as many arguments at the kitchen table as the block card. Depending on which deck you grew up with, you might know it as the Skip, the Bloqueo, or the card with the circle-and-slash symbol that quietly ruins someone's turn. It looks simple, it plays simple, and yet it sits at the center of more house-rule disputes than almost any other card in the deck.
If you have ever stared at a colored card with a crossed-out circle and wondered whether it works differently in a two-player game, whether it can be stacked, or whether "block card" is even the official name, this guide walks through everything. We will cover what the card actually does, why its name changes from country to country, how it interacts with Wild Draw Fours and Reverses, and the strategies experienced players use to squeeze maximum value out of it.
What the Block Card Actually Is in UNO
The block card is a colored action card that forces the next player in turn order to lose their turn entirely. Play it on your turn, and the player to your left (or right, depending on the direction of play) simply gets skipped. They do not draw, they do not play, and the action moves straight to the following player. In the standard 108-card English deck, this card is printed with the word "Skip," but the symbol and function are identical to what many players call the block card.
A classic UNO deck contains two block cards in each of the four colors, meaning eight in total. That is a meaningful chunk of the deck, which is why blocking feels so frequent in practice. Each one is a colored card, so it can be matched by color or by symbol, and it can also be played on a Wild or a Wild Draw Four that has already declared a matching color. Because it carries a color, it is never truly dead in your hand unless the color has been exhausted and you cannot match anything else.
Why the Name Changes From Region to Region
Mattel and its international partners localize UNO rulebooks for dozens of markets, and action card names are translated rather than kept in English. In Spanish-speaking regions, the Skip card is printed as "Bloqueo," which translates literally to "block" or "blockade." That single translation is why a huge number of players worldwide call it the block card, even when they are holding an English deck that says Skip on the face.
The pattern repeats across languages. German decks label it "Aussetzen," French decks use "Passe," and Italian decks print "Salta." Digital versions of UNO, including the official mobile app and most console releases, standardize on the English term "Skip" to avoid confusion across servers. The result is that two players can sit down with functionally identical cards, use different names, and spend five minutes arguing about whether they are talking about the same thing.
How the Block Card Works in Standard Play
Officially, the sequence is straightforward. On your turn, you play the block card if it matches the color or symbol of the top discard, then play continues with the following player being skipped. If the skipped player was about to be the only other player in a two-person game, the block functions as an extra turn for you: you play it, your opponent is skipped, and you immediately take another turn. This is why block cards are disproportionately powerful in heads-up play.
Edge cases matter here. If a Reverse has just flipped the direction of play, the block skips whoever is next in the new direction, not the player who would have been next before the reverse. If a Wild Draw Four has been played, the official rules require the target player to draw four cards and lose their turn; a block card cannot be played out of turn to cancel that, though many households allow exactly that. Learning the official timing prevents most table disputes before they start.
Block Card Strategy and the House Rules Around It
Competitive UNO is a game of tempo, and tempo is exactly what the block card manipulates. Every block you play costs an opponent a full turn, which in a four-player game can be the difference between someone going out and someone sitting on a hand of nine cards. Strong players treat blocks less as a defensive panic button and more as a scheduling tool that controls who gets to act and when.
Beyond raw turn denial, blocks are also the safest way to dump a color you suspect is about to become useless. If you are holding a block card in yellow and two other players have been hoarding yellow cards all game, playing it now gets you out of that color while still producing a useful effect. Compare that to discarding a plain number card in the same color, which accomplishes nothing except thinning your hand.
- Block: denies the next player a turn without affecting your hand size.
- Reverse: changes direction and can be devastating near the end of a round.
- Draw Two: punishes the next player with cards and a lost turn.
- Wild Draw Four: the heaviest penalty in the deck, but challengeable.
Timing and Targeting Tactics
The most common mistake casual players make is firing off a block card the moment they can. That is usually wasted value. The ideal moment to block is when the next player has visibly reduced their hand, especially when they are down to one or two cards and are clearly waiting for a color to match. Blocking then does not just delay them; it forces them to survive another full rotation before they get another chance to go out.
In games with three or more players, position matters enormously. A block used when the next player has a large hand accomplishes very little, but the same card used to skip a player who is about to be followed by your strongest rival can shift an entire round. Pair a block with a Reverse played earlier, and you can effectively choose which opponent gets skipped rather than accepting whoever happens to be next in line.
Common House Rules Involving Block Cards
Unofficial variants have grown up around the block card because it feels like it should do more. The most popular is stacking, where a player responds to a block by playing their own block, pushing the skipped turn further down the line. Officially this does not exist: a skipped player has no turn and therefore cannot respond with anything. That has never stopped millions of households from playing it that way, and it makes for chaotic, entertaining rounds.
Other common variations include allowing a block card to cancel a Draw Two or Wild Draw Four that was just played at you, and treating the block as a "skip everyone" card in games with large groups. Mattel has actually leaned into the idea with products like UNO Show 'Em No Mercy, which includes both Skip and Skip Everyone cards, and UNO Flip, whose dark side features a Skip Everyone that hits every other player at the table. If your group loves aggressive blocking, those decks are worth trying.
The block card rewards patience more than any other card in the deck. Holding one through the early game and deploying it at the exact moment an opponent is ready to go out is a small, satisfying skill that separates casual players from genuinely annoying ones. Next time you shuffle up, pay attention to who is sitting next to you, count the turns, and let that little crossed-out circle do its quiet work. The best block is the one nobody sees coming.