(1) Tal,Mikhail - Keller,Dieter [D44]
Zuerich Zuerich (7), 1959

1.Nf3 Nf6 2.c4 e6 3.Nc3 d5 4.d4 c6 5.Bg5 dxc4 6.e4 b5 7.a4 Qb6 8.Bxf6 gxf6 9.Be2 a6 10.0-0 Bb7 11.d5 cxd5 12.exd5 b4 Destroys the balance; White is winning.

13.a5 Qc7
Diagram

14.dxe6 bxc3 15.Nd4 Rg8 16.Qa4+ Kd8 17.g3 Bd5 18.Rfd1?
A mistake, giving away the advantage. 18.Rad1 was correct.

18...Kc8?
A wrong reply, allowing white another winning possibility. [18...cxb2 19.Rab1 c3 Huebner does not see how can White's attack break through.]

19.bxc3?
The chances are now equal. [19.Qe8+ Kb7 20.bxc3 was winning.]

19...Bc5 20.e7?
Not precise. [20.Bxc4 gives better chances.]

20...Nc6?
[Black's life would be easier after 20...Bxe7 ]

21.Bg4+ Kb7 22.Nb5?
A losing move. Three moves, 22.Nf5; 22.Rab1+; and 22.Nb3, give White equal chances.

22...Qe5 23.Re1 Be4?
[23...Qg5 would win.]

24.Rab1 Rxg4 25.Rxe4 Qxe4 26.Nd6+ Kc7 27.Nxe4 Rxe4 28.Qd1 Re5?
Missing a draw. Eliminating the pawn on e7 was necessary: 28...Bxe7, 28...Nxe7 or 28...Rxe7 give black chances to hold.

29.Rb7+ Kxb7 30.Qd7+ Kb8 31.e8Q+ Rxe8 32.Qxe8+ Kb7 33.Qd7+ Kb8 34.Qxc6 1-0