A best-of-one is the shortest contract in esports: the winner of the single game is the winner of the match, full stop. As the LoL odds page puts it, in a BO1 the game winner is also the match winner, while in longer series the match price covers the whole series. That identity changes how every number on the board should be read.
One game settles everything
In a best-of-three, a team can drop the first map and still settle as the winner at 2-1. A best-of-one has no such route: the final score is 1-0 or 0-1, and the market closes on the first mistake that decides the game. There is no series narrative inside the price, only the game itself.
This is also why a BO1 and a BO3 between the same two teams are different events, not the same event at different lengths. The CS2 page makes the same point for its own board: never compare a BO1 price against a BO3 price as if they priced the same contest.
The format flattens the edge
A series gives the stronger team room to be better. Over three or five maps, a single bad game does not have to end the contest. A best-of-one removes that room: the favorite gets one map to be the better team, and every upset settles. Read a short BO1 favorite with that in mind: the price is not just asking who is stronger, it is asking who is stronger today, in this draft, on this side of the map.
What weighs more when there is no map two
Everything that a series would let a team adjust to arrives undiluted in a BO1. Side selection and the draft matter more, because there is no next game to adapt: the LoL page lists draft and sides among the things to check before reading a price, and in a BO1 they are the price's whole context. Map choice plays the same role in Counter-Strike: the team that lands on its best map starts with an edge that a series would dilute.
Handicaps and totals in a single game
Series-level lines mostly disappear in a BO1, because there is no series score to handicap or count. What remains are game-internal markets: round or kill handicaps and totals measured inside the one game. The market guide states the rule that keeps these readable: never carry a value such as 2.5 from one market type into another without its label and period. A total in a BO1 is about that game's rounds or kills, not about maps.
One game, one contract, no buffer. In a best-of-one the price is the match, and the match is a single afternoon.