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'GHI,LargeCV': This is a mature war game, military-themed reminiscent of Yurgelevich's 1933 Chess-Battle(128 squares)among others. The implementation itself is even more similar to 1937 Novo Chess in having terrain. Invasion's 16-square sea is never traversed at all(it exists so to come out 84 squares), whereas Novo's Water and Railroad squares serve both for barrier and transit. Also, Novo's General and General Staff are an even more interacting but comparable pair to Invasion's Headquarters and Flags. Both the H. and Flags figure in alternative win conditions, ordinary checkmate by capture of H. or else placement of Flag where other Headquarters began. That is like mediaeval Gala too in that reaching goal square(s) a certain way wins. Seven piece-types manageable; 'Commando' and 'Paratrooper' borrow the earlier (1999)Divergent Chess' differing modes of moving and capturing. 'Trooper' has been described as quadra-pawn in other CVs(Centennial Chess). 'Bomb', when turned on, is placed anywhere and removes itself and all adjacent, like Rococo's Swapper self-destructs at option with one enemy chosen adjacent.