Arkan and I have completed our game. Soviet major victory at 1678 points.
Kupyansk was captured on the final turn. The Germans were isolated from turn 11 onwards after their supply sources were blocked/captured. I decided to try and destroy as many German units as possible and moved only a handful of combat units to the exit objective (most points come from AT units, HQ's and artillery), instead of rushing for the exit objective.
The tank brigade and regular cavalry division attacked in the north, the guards cavalry in the south.