Crikey - 70 points for a win, what's the maximum you've ever had?!?

OK I was pleased with this victory, in fact I am going to write it up for the challenge of the week

But 70 points gained - I don't remember the last time I got so many for a victory!?!

Maybe it's because they were so far above me, but not that far?

I don't get what determines the number of points!?!