Latest Updates: Arpegi v5.0.1 - Updated: 02/06/2024 (More patching is more patching.)
I was black1.d4 d62.e4 Nf63.f3 c54.Ne2 h65.dxc5 dxc56.g4 Qxd1+7.Kxd1 Nc68.Bf4 Be69.Nec3 Rd8+10.Kc1 Nd411.Bb5+ Bd712.Be5 Bxb513.Nxb5 Ne2#
You could've ended it in 3 or 4 moves