WellyWales: It's not a fixed score, it depends on your BKR at the time.
When your BKR is low, even a relatively bad place in a pond can gain you points.
When your BKR is high even a first place may not raise it much higher.
The only way to see who gained what is to store the pond just before and after the last bet and compare. In ponds this is easy since you know in advance when the pond will end. (well, more or less, since there can be multiple falls in a turn and server time freezes)
And by the way, the whole BKR system is of questionable value for ponds.