Usually, after three or four games are won in a row by the same player (or some other agreed threshold is reached), the handicap shifts. For example, when "senaisen" (BWB) was being used, the handicap moves to "josen" (B) or to "tagaisen" (even, BW). A player against whom the handicap moves is said to be 'beaten down', at least a requirement to acknowledge the strength of the opponent, possibly a severe professional humiliation. The "jubango" series sponsored by the "Yomiuri Shimbun" in the twentieth century emphasised this competitive aspect, which was part of the negotiated match conditions.