[Event "World Championship 25th"] [Site "Moscow RUS"] [Date "1963.05.20"] [Round "22"] [White "Botvinnik, Mikhail M"] [Black "Petrosian, Tigran V"] [Result "1/2-1/2"] [ECO "D23"] [EventDate "1963.03.23"] 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Qa4+ Nc6 5.Nc3 Nd5 6.e4 Nb6 7.Qd1 Bg4 8.d5 Ne5 9.Bf4 Ng6 10.Be3 e6 1/2-1/2