At the beginning,at about 3500 meters, when we loose the control of the glider at 110/120 km/h, it was like a flat spin, and it seemed impossible to put the rudder on the right.
After several turns with no success for recovery I put the glider in left classical spin, to a last chance maneuver...
When we exit the spin after several turns we were approximately at 500 meters but with a very high speed, and during the rise the two outside wings went off.
We loose almost 1800 meters (ground about 1200 meters)
François