Gents:
There is a little mistake it TW lists: we should read not 4:45 but 9:45.
So, Hafner had 2 claims in that combat: Pe-2 and Yak-9 (Emonet). After that he was cought up by NN Yaks.
Challe's claim was at 10 km E of Goumbinen, Schurguponen
http://maps.yandex.ru/-/CBaXR03K
Goumbinen now is Gusev (Гусев), and place in 10 km E of it called Puspern (in late 1800th), later (in early 1900th) - Tublauken/
Schweizersfelde. Now it calls Lomovo (Ломово).
Seems, Challe never forgot himself for friendlyfire, when he killed an 12-victory ace Arkhipov of brother-regiment 18 giap (both NN and 18 giap were from 303 iad), and persued each enemy to the end.
Most likely, he engaged Hafner and followed him from 3km to ground level (where YaK-9 was faster and much more maneuvrable then Bf109G-6), and during low-level dogfigt Hafner crashed avoiding Challe's attack.