(1) Ivanov ,Igor (2415) - Karpov,Anatoly (2705) [B43]
Spartakiad Moscow (1), 1979

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 b5
A reasonable but provocative move.

6.Bd3 Bb7 7.0-0 Ne7 8.Kh1
[8.Nb3 leads to a more complicated struggle.]

8...Nbc6 9.Nxc6 Nxc6 10.Qg4 h5 11.Qe2 Ne5
Otherwise after 12.f4 Black will have no compensation for his weakened K-side.

12.f4 Ng4 13.Rf3 Qh4 14.h3 Bc5 15.Bd2
I was not filled with unwarranted optimisim. I would have been content if Karpov had given a perpetual check. The world champion's decision is easily understood , but with his next move White completes his development, while the Black King is not very safely placed.

15...g6 16.Raf1 Qe7 17.a3
preparing counterplay on the Q-side.

17...f5 18.Re1
Played on general considerations. Now I had no regrets about my opponent's refusal to repeat moves.

Loosens the coordination between Black's pieces, therefore White decides to play actively. After [18...0-0 White would be wise to limit himself to the more modest 19.Ref1 ; Also not bad was 18...Kf7 , for example 19.b4 Bd4 20.exf5 gxf5 21.Bxf5 Bxf3 22.Qxf3 Nf2+ 23.Kh2 Qf6 24.Ne4 Nxe4 25.Bxe4 with chances for both sides.]

19.b4 Bd4 20.a4 Rc8 21.Nd1
The f2 square is now safely defended, but the White Knight does not stand too well.

Unclear was [21...bxa4 ]

22.c3 Ba7 23.axb5 axb5

The Bishop on b7 is very strong, and in order to initiate successful manoeuvres on the Q-side. I decided to sacrifice my Rook for it. The decision to sacrifice was made much easier because of the fact that White doesn't really have much else to do.

24...gxf5 25.Bxb5 Bxf3 26.Qxf3 Rc7
[Weaker is 26...Rb8 27.Qd5 with threats against d7 and e6.]

Threatening to cut off the Bishop with the pawns.

27...Bd4 28.Qd5 Kd8 29.Qd6 Nf2+
Also after [29...Rg8 30.c5 Qg7 31.Bf1 Nh6 32.Ne3 Nf7 33.Qb6 White has enough compensation for the pawn.]

30.Nxf2 Bxf2 31.Be3
[After 31.Re2 Qd4 32.Qxd4 Bxd4 33.Be1 an equal ending would arise.]

[31...Bxe1 32.Bb6 with mating threats.]

32.Rxe3 Qe7 33.Qd2
[If 33.Qd4 Rg8 and probably 34...Qg7.]

33...Ke8 34.Qd4
Black's troubles grow. Perhaps the World Champion was not pleased that after [34.Ra3 White can draw with 35.Ra8+ Rc8 36.Ra7 Rc7 37.Ra8+. I feel that in this position White, without great risk, can attempt to create bigger threats. First a threat, then a double-threat that cannot be neutralized.]

[Also not safe is 34...Rh6 35.Rg3 ]

35.Qb6 Qg7
[Or 35...Kd8 36.Ra3 ]

For the first time in the game I felt I might win, and just here I made a mistake. After [36.Rxe6+ Kf7 37.Re2 the Rook on c7 is out of play and White wins easily. Everyone knows you must keep your composure until the very end, but how many of us actually do.]

36...Kd8 37.Qd5 Ra7
I realized what I had done and felt just awful. But I calmed myself with the thought that 36.Qxe6+ was my payment for 33...Ke8.

[38.Re1 Ra1 39.Rxa1 Qxa1+ 40.Kh2 Qg7 41.Bxd7 Qg3+ would draw.]

After this it's a loss. Correct was [38...h4 and White can choose between two draws: 39.Rd1 Ra1 40.Rxa1 and then as in the example above, or (40.Qxg8+ Qxg8 41.Rxa1 etc.White could even mate himself with 39.39.Kh2 Qg3+. Also bad for White is 39.Qf3 Qg3.) ]

39.Kh2 Ra2 40.Bc6 Ra7 41.Qc5 Rc7 42.Qb6
The threat is 43.Rxd7+. If 42...Kc8 then 43.Qa6+ Kd8 44.Qa8+ Ke7 45.Re3+ Kf6 46.Qa1+.

42...Kc8 1-0