alt ▁before ▁the ▁bid , ▁and ▁two ▁cards ▁are ▁de alt ▁after ▁the ▁bid , ▁per ▁player . ▁It ▁can ▁be ▁extended ▁to ▁include ▁eight ▁players ▁also , ▁in ▁which ▁case ▁the ▁cards ▁ 7 ▁and ▁ 8 ▁from ▁each ▁suit ▁are ▁introduced . ▁Three ▁cards ▁are ▁de alt ▁before ▁and ▁one ▁card ▁after ▁the ▁bid , ▁per ▁player . ▁ ▁In ▁order ▁to ▁make ▁the ▁ 3 0 4 ▁less ▁compet itive , ▁a ▁different ▁set ▁of ▁rules ▁are ▁followed ▁when ▁playing ▁ 3 0 4 . ▁For ▁example , ▁the ▁person ▁who ▁covers ▁the ▁card ▁is ▁free ▁to ▁open ▁that ▁card ▁whenever ▁he ▁wishes . ▁He ▁can ▁either ▁start ▁a ▁round ▁with ▁the ▁closed ▁card ▁or ▁if ▁another ▁person ▁plays ▁the ▁tr ump ▁group ▁un know ingly , ▁and ▁if ▁the ▁person ▁who ▁covered ▁the ▁card ▁( the ▁caller ) ▁wishes ▁to ▁play ▁the ▁covered ▁card , ▁he ▁can ▁do ▁so ▁by ▁playing ▁the ▁card ▁in ▁open ▁thereby ▁expos ing ▁the ▁tr ump . ▁Another ▁instance ▁where ▁it ▁comp licates ▁the ▁game ▁to ▁increase ▁compet it iveness ▁if ▁someone ▁except ▁the ▁caller ▁plays ▁a ▁tr ump ▁group ▁card , ▁not ▁knowing ▁that ▁it ' s ▁the ▁tr ump , ▁may ▁be ▁replied ▁to ▁by ▁the ▁caller ▁( if ▁he ▁doesn ' t ▁have ▁the ▁tr ump ▁group ▁on ▁his ▁hand ) ▁either ▁by ▁letting ▁the ▁hand ▁pass , ▁by ▁covering ▁a ▁non ▁tr ump ▁card ▁or ▁by ▁opening ▁the ▁card ▁that ▁was ▁covered ▁in ▁the ▁beginning . ▁Furthermore , ▁the ▁counting