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Risk aversion

Posted By: Maik Stiebler
Date: Thursday, 30 July 2009, at 11:22 a.m.

In Response To: Risk aversion (Timothy Chow)

Regarding your own decisions, with some effort you can make gnubg consider your risk aversion to some extent by handcrafting a match equity table that reflects the utility that you get from all possible outcomes.

The problem is that gnubg will assume that whatever amount of utility you win, your opponent loses, i.e. a zero-sum game. That's not what happens in real life, where the risk aversions of the opponents may differ (even if they don't actually differ, winning can be different from losing regarding the absolute difference in utility). You'd need two different match equity tables, one for each opponent, to model that. This option is not offered in gnubg, although it might also come handy, for example, for TTT players on dailygammon.

A second problem is that match lengths in gnubg are either limited (I don't know), or that at least match equity tables for matches long enough to accomodate meaningful 256-cubes (or worth!) are clumsy to create and deal with.

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