In all other rules, the player is forced to go through the complicated procedure, such as in RIF rule the placement of 3 stones by first player (why need?!

• （而）在其他规则里，棋手们被迫要经历这一复杂的步骤，就比如RIF规则里面，要求先手的棋手首先定下前面3手的位置（为什么要这样？