Ten-pin bowling Effectively, there are three kinds of marks given in a score; a strike (all ten down in the first ball), a spare (all ten down by the second ball), and an open (one or more pins still standing after the second ball). A strike earns ten pins plus the pins for the next two balls thrown. (For example, if a player got a strike then followed with a 7 and 2 in the next frame, the value for the strike frame would be 10+7+2, or 19; if the player got a strike followed by another strike the next frame and
Ten-pin bowling it is damaging the integrity of the sport. Before 1970, nearly all bowling balls had a hard rubber surface. As the coatings applied to wood lanes changed from softer lacquer to a harder urethane in the early 1970s, the first polyester balls became widely available. Subsequent changes since the early 1980s — particularly with urethane surfaced and later "reactive" resin or composite ("particle") surfaced bowling balls—have been altering the physics of how the ball rolls and strikes the pins. Coupled with synthetic lane surfaces and advanced oiling machines presenting the opportunity to lay out lane oil patterns that make targeting