Level 2 polish openings: wilkosz (most popular): 2d = 5+5+ at leats one major, 6-10 hcp 2h = 6+ hearts, 6-10 hcp 2s = 6+ spades, 6-10 hcp 2nt = 5+5+ minors, 6-10 hcp mini multi 2d = 6+M, 6-10 hcp 2h = 5+h, 5+other suit, 6-10 hcp 2s = 5+s, 5+m, 6-10 hcp tutti frutti 2d = 6+h or 5+s and 5+m, 3-10 hcp 2h = 6+s or 5+h and 5+m, 3-10 hcp 2s = 5+5+MM 5-10 hcp or 6+minor dwukolorowki Zdzisia 2d = 6+h or 5+s & 5+d 2h = 6+s or 5+h & 5+c 2s = blacks or reds 2nt = majors or minors Btw, strong two-suiters are disadvantage of wj2000 system, but are not a large problem if you bid for example "strefa" polish club system. However it depends on distribution of your hand. If you just started to learn wj2000 I recommend you Dan Neill translation. I think it is not necessary to learn other versions, even the best, if no one will understand you during bidding, except the author ))) Of course if you use in your system level 2 multi opening it is not a problem: 2d= 6+M, weak or 18+ minor suit unballanced hand (other variations are 3 suiter or strong nt). But... than 2d has to be F1, and I do not like it.