White played 1. Nd4.
The black knight was pinned against the black queen, attacked 3 times and protected twice so could be lost. At this point the game was declared as 1-0 so I assume that black resigned.
It could have continued as follows:
1. ... Rb4
2. Bxb4 Qxb4
3. Nxc6 Qxa4
4. Rxa4 Rxc6
5. cxd5
This would leave the position as follows, which is hopeless for black:
