[Event "Botvinnik - Petrosian World Championship Match"]
[Site "Moscow URS"]
[Date "1963.05.15"]
[EventDate "?"]
[Round "20"]
[Result "1/2-1/2"]
[White "Mikhail Botvinnik"]
[Black "Tigran Vartanovich Petrosian"]
[ECO "D27"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "42"]

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 c5 5.Bxc4 e6 6.O-O a6 7.Bb3
Nc6 8.Qe2 cxd4 9.Rd1 Be7 10.exd4 Na5 11.Bc2 b5 12.Nc3 Bb7
13.Bg5 O-O 14.Rac1 Rc8 15.Bb1 Nc4 16.Ne5 Nb6 17.Qd3 g6 18.Bh6
Re8 19.Qh3 Nc4 20.Nxc4 Rxc4 21.Ne2 Qb6 1/2-1/2