[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "7"]
[White "Petrosian, Tigran V"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2640"]
[BlackElo "2440"]
[ECO "E60"]

1.d4 Nf6 2.c4 g6 3.d5 Bg7 4.g3 c6 5.Bg2 Qa5+ 6.Nc3 Qb4 7.Qd3 d6 8.Kf1 cxd5
9.cxd5 Na6 10.a3  1/2-1/2

