RIF opening rule

RIF opening rule is a renju opening rule. It was adopted by the Renju International Federation (RIF) in 1996 as an upgrade to Swap opening rule and was an official rule for Renju World Championships from 1996 till 2008.
Rule details.
The sequence of moves implied by the rule follows.
It is not allowed to pass within the first three moves.
Brief description.
This rule offers a very limited variety of equal openings for top-players (namely, 3D, 11D). After some years of playing and analyzing (taking into account the growth of computer capabilities) it became clear that this opening rule needs to be upgraded. Therefore, in 2008 the Yamaguchi opening rule was adopted as an opening rule for official title tournaments and some other rules were certified by RIF.
Tournaments played by this rule.
This opening rule was an official opening rule for Renju World Championships and Renju Team World Championships as well as the most of other tournaments between 1996 and 2007.
Now it is used mostly in novice-level tournaments.