ABSTRACT
The initial prototype developed by Jitnah (1993) used a simple polytree structure. This was largely for pragmatic reasons, as the message passing algorithms for polytrees were simple to implement, and at that time, BN software tools were not widely available.1 The original network structure is shown in Figure 11.1(a). The polytree structure meant that we were making the (clearly incorrect) assumption that the final hand types are independent.
