She was riding Paulchen Panther.
Tina Richter-Vietor was a highly experienced and well known rider. She had been a double bronze medallist at the European Eventing Championship for Young Riders; two weeks ago she won the German national Eventing title with the regional team of Weser-Ems.
The FEI said the technical specifications of the course were within the dimensions stated in the rules.
The causes of this accident are being investigated by the FEI Safety Sub-Committee.
One jumping competition took place after the accident, before the rest of the event was cancelled.