[Event "URS-ch25 Semifinal"]
[Site "Kiev"]
[Date "1957.11.15"]
[Round "4"]
[White "Kotov, Alexander"]
[Black "Petrosian, Tigran V"]
[Result "1/2-1/2"]
1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. b4 c6 6. Nf3 d5 7. cxd5 Nxd5 8. Qb3 Nxc3 9. dxc3 Be6 10. Qb2 1/2-1/2