Ten-pin bowling Bowling Championships. Ten-pin bowling has an international ranking system, as with many professional individual sports. This ten-pin equivalent is known as the World Ranking Masters and is made of three vast tours: the European, Americas and Asian bowling tours. Other minor tournaments, although major in their respective countries, include Britain's prestigious BTBA Nationals (BTBA National Championships), the Brunswick Ballmaster Open, Brunswick Euro Challenge in Greece, ETBF European Youth Championships, the European Gold Cup and the Mediterranean Challenge Cup. The world's premier amateur event is the WB/WTBA World Championships (World Bowling) which has been running since 1954 and is now held
Ten-pin bowling have a decimal component (numbers to the right of the decimal point) discard all numbers to the right of the decimal point, leaving only a whole number, as rounding any decimal number equal or higher than 0.500, "up" to the next highest whole number when calculating averages is prohibited by USBC rules on scoring in tenpins. As of the 2014–15 season, approximately 1.57 million people compete in bowling leagues in the United States. At its peak in 1980, over eight million men and women competed in leagues throughout the United States. In ten-pin bowling there are two major world organizations