[Event "Capablanca memorial 2nd"]
[Round "20"]
[Site "Havana"]
[Date "1963"]
[White "Calero, Ivan"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "E26"]
[Opening "Nimzo-Indian, Saemisch Variation, 4.a3 Bxc3+ 5.bxc3 c5 6.e3"]
 1. d4   Nf6
 2. c4   e6
 3. Nc3  Bb4
 4. a3   Bxc3+
 5. bxc3 c5
 6. e3   b6
 7. a4   Nc6
 8. Ba3  d6
 9. Nf3  O-O
10. Bd3  Ba6
11. Nd2  Na5
12. O-O  Rc8
13. Qe2  Re8
14. f3   Re7
15. Rfc1 Rec7
16. e4   cxd4
17. cxd4 e5
18. d5   Nb7
19. Qf1  Nd7
20. Bb4  Ndc5
21. Bc2  Na5
22. Bxa5 bxa5
23. Rcb1 Rb8
24. Rxb8 Qxb8
25. Rb1  Rb7
26. Rxb7 Qxb7
27. Qb1  Qb4
28. Qxb4 axb4
29. Kf2  Kf8
30. Ke2  Ke7
31. Kd1  Kd7
32. Kc1  Kc7
33. Kb1  Kb6
34. Ka2  Bc8
35. g3   Bd7
36. f4   f6
37. fxe5 fxe5
38. Nf3  a5
39. Ng5  h6
40. Nf3  Nxa4
41. Bxa4 Bxa4
42. Nd2  Kc5
0-1