Curious Game

The traditional Groningen open is in progress at the moment. Many interesting games are played already. Here is a curious miniature from Round 1:
Biedekoepper,Robert - Van Oosterom,Chiel [A65]
Schaakfestival Groningen 2008 (1.20)
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 0–0 6.Bg5 c5 7.d5 e6 8.Nge2 exd5 9.cxd5 a6 10.a4 Nbd7 11.g4 Re8 12.Ng3

12...Nxe4! 13.Bxd8 Nxc3+ 14.Qe2 Nxe2 15.Bxe2 Bxb2 0–1