The other, and some would say more 'hardcore' form of full-contact, is known as knockdown karate. This style of fighting was pioneered by the Kyokushinkai, founded by Masutatsu Oyama. In fighting the competitors have no or minimal shin padding and no body protection other than groin guards. Face punching and groin and joint attacks are prohibited but all bare-knuckle and elbow strikes to the body, and kicks (including kicks with the knee) against thigh, body, head and face are permitted, as are sweeps. Score is only made by knocking your opponent to the floor, or incapacitating them, or by sweep and controlled follow-up for half a point. Most other karate styles that originated in Kyokushin, such as Enshin, Ashihara Karate Kaikan, seido, Shidokan and Seidokaikan (the style that originated the K-1 kickboxing tournament, are also knockdown styles and uses slight variation of the competition rules. A few other styles such as Kansuiryu Karate are also knockdown style, but originated independently of Kyokushin.