is followed by a 2-minute autonomous demonstration judged by a panel of experts - typically the key members of the ROBO-ONE organizing committee. The specific details of the scoring system used have never been publicly disclosed. Only the top scoring entries win the right to return for the second days matches.The matches held on the second day are roughly based on K-1 boxing events with each robot trying to knock its opponent down, or out of the ring. ROBO-ONE J: A 'junior' level ROBO-ONE competition that usually featured smaller robots, and gave special emphasis to family participation. As of ROBO-ONE 11 (March 2007) the ROBO-ONE J themes were combined into the primary ROBO-ONE competitions and ROBO-ONE J events were no longer staged. ROBO-ONE Special: Annual one-day competitions featuring a set of 'special' challenges including a timed Dash, a ball toss, climbing a set of stairs, opening a door, and an obstacle course. As of August 2006 the stair climbing and door opening challenges were combined into the obstacle course portion of the competition. ROBO-ONE Grand Prix: Each Winter eight to twelve of the top ROBO-ONE competitors participate in a series of matches held in different locations around Japan over a period of six to eight weeks. Points are awarded according to the win–loss records of each entry during the series. ROBO-ONE Technical Conference: An annual one-day conference, typically held in Kawasaki, Japan, focused on sharing information and promoting the sport. Presentations include design lectures by the top builders as well as product and technology sessions from key manufacturers. ROBO-ONE In The Space: A special project officially announced by the ROBO-ONE committee at ROBO-ONE 9 (March 2006) to stage ROBO-ONE competitions in low earth orbit by October 2010. ROBO-ONE Soccer: A ROBO-ONE Soccer match was staged as a preliminary demonstration at the August 2006 ROBO-ONE Special competition, and also during the September 2006 ROBO-ONE 10 event in Nagai in Japan. The ROBO-ONE committee has scheduled the first official ROBO-ONE Soccer competition for August 2007 at the Panasonic Center facility in Tokyo. ROBO-ONE auto: Autonomous Biped Robot Fight Tournament (Feb 25, 2017) . Specifications Early ROBO-ONE specifications were deliberately minimal to encourage as much participation as possible. As the robots' performance has improved, the specifications have been tightened to keep the focus on 'humanoid robotics'. For example, the foot/sole size in relation to the robots overall size has been incrementally decreased for