I still think the analogies of saying that Chess = War, and Poker = Business are extremely tenuous.
In a game of chess, you start with an almost perfectly symmetric situation (except for one side moving first), the initial conditions are perfectly known, every action has fully understood consequences, the current situation is always perfectly known, there is no uncertainty or randomness introduced by the caprice of nature, potential actions and counter-actions can be endlessly projected into the future and analyzed, there is one sole objective that is fully understood, absolute victory means absolute defeat for your opponent and vice versa, everything can be sacrificed toward the single all-important objective ...
Can you think of a single war that had any of the above characteristics?
War is not a zero-sum game (it's always negative-sum). Battles are never fought between perfectly symmetric armies. Chaos and uncertainty is the nature of war. Ideological objectives are weighed against pragmatic and humane realities.
War is the unbounded application of force to resolve disagreement. Chess is just a mathematical exercise, and resembles war no more than checkers (the similar characteristic being the elimination of opposing units).
Poker is about calculated decisions in the face of uncertainty and risk which resembles business, but it is also a zero-sum game that promotes deceit and intimidation.
I think it would be highly cynical and damaging to society as a whole to conduct business as if it was zero-sum game with deceit and intimidation being essential tools. To simplify business in such a manner would be to assume that all involved are simply con-men.
Business, viewed as the productive enterprise of man, should be a positive-sum game. By exploiting nature rather each other, our productive labor and ingenuity can be leveraged to ensure that everyone is better off.
The fundamental idea behind barter is that we can exchange goods/services such that we are each better off because we each place more value in what the other offers. This same basic idea extends to general trade, business deals, and economies/societies as a whole. This idealism doesn't stop deceit, intimidation, and the zero-sum mentality from affecting business, but society actively works toward limiting its impact with various mechanisms ranging from the criminal justice system to regulatory oversight to reputation networks (e.g., public opinion, boycotts).