Chess has no randomness at all. Both players see the entire board, every piece, every possible move. The better player wins, virtually every time, which is exactly what makes chess a poor party game. Invite a group of friends with mixed skill levels to play, and the experienced player will crush the novice in fifteen moves, and neither of them will have much fun. Now consider Monopoly. The dice determine everything — where you land, which properties you can buy, whether you go to jail. Strategy matters at the margins (experienced players know which properties have the best return on investment), but a lucky run of rolls can beat a sound strategy on any given night. This makes Monopoly more social and accessible than chess, but it also makes it frustrating, because skilled play is only loosely connected to winning.
The best modern board games live in the space between these extremes, and the way they use randomness is one of the most interesting aspects of game design. The core question every designer faces is: where in the decision chain should randomness appear? The answer shapes everything about how the game feels.
Randomness before a decision — what designers call "input randomness" — gives players a random situation and asks them to make the best of it. You draw a hand of cards you didn't choose, or you roll dice that determine your available actions, and then you decide what to do with what you got. The randomness creates variety and surprise, but the player's response to it is entirely skill-based. Poker is the classic example. The deal is random; the betting is strategy. The best players win consistently over time because they make better decisions in response to the random input, even though any individual hand can go to anyone.
Randomness after a decision — "output randomness" — lets players choose their action and then applies a random result. You decide to attack, then roll to see if you hit. You choose to invest, then draw a card to see if the market went up or down. This type of randomness is more controversial among serious gamers because it can feel like the game is punishing good decisions and rewarding bad ones. You made the right call, the dice betrayed you, and there's nothing you could have done differently. In moderation, output randomness creates drama and emotional stakes. In excess, it creates the feeling that your choices don't matter.
Most well-regarded games use input randomness heavily and output randomness sparingly. Settlers of Catan rolls dice at the start of each turn to determine which resources are produced — that's input randomness, and everyone adapts to it. Pandemic draws infection cards that determine where disease spreads — input randomness again, creating a dynamic puzzle that changes each turn. Ticket to Ride has you drawing from a randomized deck of train cards, then deciding which routes to build with whatever you drew. In all of these, the randomness creates the situation; the skill is in the response.
The role of randomness in games also serves an important social function: it keeps the gap between experienced and novice players smaller than pure skill would allow. If a new player can occasionally beat a veteran because the dice were kind or the card draw was favorable, they stay engaged. If they lose every game by a crushing margin because there's no variance to close the gap, they stop playing. Randomness is the great equalizer in social gaming, and designers calibrate it deliberately. A family game needs more of it. A competitive strategy game needs less. A game trying to serve both audiences needs to be very clever about where it appears and how much influence it has.
For tabletop gamers who care about the integrity of the random elements, the tool they use matters. Physical dice have the tactile appeal that's central to the board game experience, but as anyone who's played on an uneven table or with cheap dice knows, the physical reality of a roll introduces its own variables. A virtual dice roller or card picker provides a mathematically clean distribution that removes those variables, which is why competitive and tournament play increasingly incorporates digital tools alongside physical components.
The deeper lesson from game design is that randomness isn't the opposite of strategy — it's a design element that can enhance, diminish, or redirect strategic depth depending on how it's deployed. The best games don't minimize randomness or maximize it. They put it in the right place, at the right moment, in the right amount, so that every game feels familiar enough to be learnable and different enough to be worth playing again.