executing a spin or spinning movement immediately afterwards; however, this movement will not be counted as an element. Difficult spin variations increase the level of a spin and are worth more points. These variations include a movement of the body part, head, leg, arm, or hand that requires flexibility or physical strength and that effects the balance of the skater's main body core. There are 11 categories of difficult spin variations; three are in the camel spin position, based on the direction of the skater's shoulder line. A spin combination must have at least "two different basic positions with 2 revolutions in each of these positions anywhere within the spin". Skaters earn the full value of a spin combination when they include all three basic positions. The number of revolutions in non-basic positions are included in the total number of revolutions, but changing to a non-basic position is not considered a change of position. The change of foot and change of position can be made at the same time or separately, and can be performed as a jump or as a step-over movement. Non-basic positions are allowed during spins executed in one position or, for single skaters, during a flying spin. Difficult exits must have a significant impact on the spin's execution, control, and balance. Photo gallery of single spins Pair skating Solo spin combinations The solo spin combination must be performed once during the short program of pair skating competitions, with at least two revolutions in two basic positions. Both partners must include all three basic positions in order to earn the full points possible. There must be a minimum of five revolutions made on each foot. Spins can be commenced with jumps and must have at least two different basic positions, and both partners must include two revolutions in each position. A solo spin combination must have all three basic positions (the camel spin, the sit spin, and upright positions) performed by both partners, at any time during the spin to receive the full value of points, and must have all three basic positions performed by both partners to receive full value for the element. A spin with less than three revolutions is not counted as a spin; rather, it is considered a skating movement. If a skater changes to a non-basic position, it is not considered a change of position. The number of revolutions in non-basic positions,