Despite losses the Germans sense a victory. Pressing forward, using Cav units to block roads and rail connections for supply tracing.
Russian units fall out of command due to isolation, While II and IV corp attempt to stem the tide and hold key junctions. XX Corp has to secure the rear but its chit has not been pulled yet!
Both IV and III Corp reel as the GD army presses in with heavy attacks.
The fighting around Gumbinnen is rough and the Russkies end up OOS.
I Corp attacks and drives the reduced Cavalry off the rail lines this blocks ALL supply to ALL Russian units.
Its pretty much game over at this point.