The full contact knock-down rule: the blows with hands and legs should
be placed directly on the opponent's body.
Bouts are conducted with empty hands and barefooted. The groin protector
and gum-shield are obligatory, whereas the gloves can be used if desired.
The competition is not interrupted after every point and scoring is
made after finishing the competition.
The ground wrestling can take place only thrice not longer than 20
sec each time, but during the extra-time it is unlimited, as well as
while a locking or a strangulation technique is being used, though it
depends on the referee.
The winner's points are:
one-blow victory (ippon) counts 4 points;
victory on skills (waza-ari) counts 2 points;
victory on effectiveness of methods (yuko) counts 1 point.
When it is decided to prolong a bout the desires of both opponents