Ten-pin bowling may be won when one player is ahead by more frames than remain of the possible 12 frames. This variant reduces match length and scoring complexity for two-player matches. The maximum score in a game of ten-pin is 300, scored by making 12 strikes in a row. Before 1908, no one ever received an award for a game greater than 298. ABC used to award medals (gold, silver and bronze) for the three highest individual games rolled in the nation. The number of perfect games bowled during a season first became a problem for American Bowling Congress (ABC) officials in
Ten-pin bowling a "shovel-pitch" from the side. A conventional bowling ball is designed to roll about a generally horizontal axis, and often the core is asymmetric so that the ball can hook naturally. However, in parts of Asia, the "spinner", "helicopter" or "UFO" release is more common. A ball spinning about a generally vertical axis of rotation spins like a top down the lane, and slides straighter, regardless of oil pattern. The ball takes an unconventional path along the front pins ("deflection"), creating domino effect pin action. The spin is generated by rotating the hand counter clockwise (right-handed bowlers) until the hand