A climbing competition (or comp) is usually held indoors on purpose built climbing walls. There are three main types of climbing competition: lead, speed, and bouldering. In lead climbing, the competitors start at the bottom of a route and must climb it within a certain time frame in a single attempt, making sure to clip the rope into pre-placed quickdraws along the route. Bouldering competitions consist of climbing short problems without rope, with the emphasis on number of problems completed and the attempts necessary to do so. Speed climbing can either be an individual or team event, with the person or team that can climb a standardized route the fastest winning.