Though variation is extensive, Tang Soo Do free-sparring is similar to competitive matches in other traditional Okinawan, Japanese and Korean striking systems and may include elements of American freestyle point karate. Tang Soo Do sparring consists of point matches that are based on the three-point rule (the first contestant to score three points wins) or a two-minute rule (a tally of points over one two-minute round, but see also AAU Taekwondo point sparring handbook). Lead and rear-leg kicks and lead and rear-arm hand techniques all score equally (one point per technique). However, to encourage the use of jumping and spinning kicks, these techniques may be scored with a higher point value than standing techniques in some competitions. Open-hand techniques other than the ridgehand and leg sweeps are typically not allowed.