This network adds flows out of the sink, and into the source, as well as increasing the number of nodes and pipes in the network.
Programs must learn not to send flow out of the sink, or into the source. Also, the program must not send flow to the middle node from the top, because the middle node does not have sufficient output capacity to handle the extra flow.
The three lowest fitness scores of 20 indicate that the program never learned not to send flow out of the sink node. The three scores of 25 indicate programs which learned not to send flow out of the sink, but were fooled by both the flow from the top node back into the source, and the flow from the top node into the middle node, where it cannot be effectively used.
The average fitness value was 24.125, or 80 percent of an optimal flow of 30.