A yo-yo competition normally consists of two parts, a set of compulsory tricks and a freestyle, where points are scored for each and the winner is the yo-yoer who scores the mostpoints. Compulsory tricks (also known as a trick ladder) are a set of tricks that have been chosen before the contest, and the competitor must successfully complete each trick on their first or secondattempt to score points. The freestyle is when the yo-ist performs a routine to their choice of music in front of a panel of judges, and is judged based on difficulty of the tricks, synchronization withthe music and artistic performance.
Yo-yo bodies come in a number of form factors or "silhouettes," each designed with specific advantages in mind. However, there are three popular configurations.Imperial
The Imperial shape is often considered the original yo-yo shape, and is very commonly recognized. It is sometimes called a sculpted design. The shape's design is helpful in performinglooping tricks. It was first produced by a man named Pedro Flores who is also the first person to mass-produce yo-yo. Duncan bought the rights to the design in 1929.
The modified shape is a verypopular design for looping style tricks. This shape is also known as a flywheel or modern shape. It usually has a hollowed face (sometimes covered with paper or plastic) with extra material left inthe rim. The modified shape yo-yo is also used for string tricks because of the long spin times due to its shape.
Debuting in 1958, the butterfly has a wider string gap to make it easier tocatch the yo-yo body on the string. The butterfly looks a bit like the separated halves of a standard yo-yo that have been reconnected back-to-back. Although the butterfly shape is good for 'stringtricks,' it is not good for 'looping' tricks, because the winged shape of the body does not allow it to easily flip while looping. This shape is similar to a small Diabolo, sometimes called a Chinese...
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