Battlechess, also spelled Battle Chess and B.A.T.T.L.E.C.H.E.S.S. (1989), is a variant of chess in which no holds are barred and it's every man for himself (female players are permitted to form leagues). It's an all out brawl and only the fittest are destined to survive. You asked and we answered--it's pure chess carnage.
Under the rules of Battlechess, defeated pieces must be destroyed, never to return. The rules are otherwise the same as regular Chess' rules. In the event that a pawn reaches the End Zone, the only thing for it is to order new pieces and wait for them to arrive.