It may not be obvious to the eye which of two rocks is closer to the button (center) or if a rock is actually biting or not. There are specialized devices to make these determinations, but these cannot be brought out until after an end is completed. Therefore, a team may make strategic decisions during an end based on assumptions of rock position that turn out to be incorrect.The score is marked on a scoreboard, of which there are two types; the baseball type and the club scoreboard.The baseball style scoreboard was created for televised games for audiences not familiar with the club scoreboard. The ends are marked by columns 1 through 10 (or 11 for the possibility of an extra end to break ties) plus an additional column for the total. Below this are two rows, one for each team, containing the teams score for that end and their total score in the right hand column.