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.
(ascunde) Dacă vrei să fii la zi cu ultimele afişaje de pe tabelel de discuţii,poţi primii veşti la ştiri clienţi,făcând click pe logoul RSS de pe parte de sus a fiecărei table. (pauloaguia) (arată toate sfaturile)