Well:
"When the players got stronger they found that playing with "completely free" rules was in great favour of Black (the beginner of the game). It is also proved that there is a sure win for Black when playing with "completely free" rules."
(from http://www.renju.nu/r1rulhis.htm)
The rule "no-more-then-five for black" is one of "black" restrictions in renju.
(dölj) Om du vill spela ett parti med en motspelare på ungefär samma nivå, så kan du ange önskat ratingintervall för motståndaren när du skapar ett nytt parti. Då kan ingen med ett ratingtal utanför detta intervall anta utmaningen. (Katechka) (Visa alla tips)