[Event "Hoogovens"]
[Site "Wijk aan Zee NED"]
[Date "1978.01.22"]
[EventDate "1978.01.20"]
[Round "3"]
[Result "1/2-1/2"]
[White "Miguel Najdorf"]
[Black "Henrique Mecking"]
[ECO "A15"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "85"]

1.Nf3 {Notes by John Nunn } Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5
5.e4 Nxc3 6.dxc3 Qxd1+ 7.Kxd1 f6 8.Bc4 e5 9.Be3 Nd7 10.Ke2 Bc5
11.Rhd1 Bxe3 12.Kxe3 Nb6 13.Nd2 Ke7 14.Bb3 Be6 15.Bxe6 Kxe6
16.b3 Rhd8 17.Nf3 Nd7 18.Ne1 Nc5 19.Nd3 Nxd3 20.Rxd3 Rxd3+
21.Kxd3 Rd8+ 22.Ke2 f5 23.exf5+ gxf5 24.Rd1 Rxd1 25.Kxd1 e4
26.Ke2 f4 27.f3 Kf5 28.g4+ Ke5 29.h4 b5 30.b4 Kd5 31.Kf2 e3+
{Creating a strong protected passed pawn is so natural that is
easy to understand why Black played this move. However, it
actually throws the win away. -- Nunn (Correct is
31...exf3!!)} 32.Ke2 Kc4 {Now White must push a kingside pawn
as otherwise Black plays ...Kxc3 followed by ...Kd4. 2...c5 is
no better as after Kd3 Black cannot make progress.} 33.h5 {Now
there is a threat of g5, so the king must return. Note that
33.g5? is a mistake after 33...Kd5 Black just marches his king
to the h5-square, or if White plays h5, to f5.} Kd5 {Forcing
White to play h5 has given Black's king an avenue of
penetration on the kingside, but surprisingly it is not enough
to win.} 34.Kd3 Ke5 35.Ke2 Kf6 36.Kf1 Kg5 37.Ke1 Kh4 38.Kf1 h6
{Or 38...Kg3 39.Ke2! and now g5 is a threat, so the king must
return. Not, however, 39.g5? at once since 39...Kxf3 40.g6 e2+
41.Ke1 Ke3 wins for Black.} 39.Kg2 Kg5 40.Kf1 Kh4 41.Kg2 c6
42.Kf1 Kg3 43.Ke2 1/2-1/2