Stockfish
PGN
| Event | Siegen olm |
| Site | Siegen |
| Date | 1970.??.?? |
| Round | 13 |
| White | Portisch, Lajos |
| Black | Spassky, Boris |
| Result | 1/2-1/2 |
| ECO | D59 |
| PlyCount | 31 |
Moves
1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Be7 5.Bg5 O-O 6.e3 h6 7.Bh4 b6 8.Rc1 Bb7 9.Bd3 c5 10.cxd5 Nxd5 11.Bxe7 Qxe7 12.Nxd5 exd5 13.dxc5 bxc5 14.O-O Nd7 15.Qa4 Rfc8 16.Qa3 1/2-1/2
