Ivkov vs V Cuderman, 1957 (A16) English, 41 moves, 1-0 Ivkov vs Z Mestrovic, 1963  (A21) English, 45 moves, 1-0 Ivkov vs I Bilek, 1965 (A30) English, Symmetrical, 40 moves, 1-0 Ivkov vs D Minic, 1966  (A10) English, 38 moves, 1-0 Ivkov vs S Tatai, 1966  (A15) English, 24 moves, 1-0 Ivkov vs V Kozomara, 1967  (A23) English, Bremen System, Keres Variation, 61 moves, 1-0 Ivkov vs H Kestler, 1968 (A37) English, Symmetrical, 24 moves, 1-0 Ivkov vs W Pietzsch, 1968 (A35) English, Symmetrical, 41 moves, 1-0 Ivkov vs C Zuidema, 1968 (A22) English, 23 moves, 1-0 Ivkov vs Gligoric, 1970  (A15) English, 71 moves, 1-0 Ivkov vs A Medina Garcia, 1969 (A14) English, 38 moves, 1-0 Ivkov vs Bobotsov, 1970 (A37) English, Symmetrical, 34 moves, 1-0 Ivkov vs I Platonov, 1970 (A30) English, Symmetrical, 59 moves, 1-0 Ivkov vs R Nicevski, 1970 (A36) English, 33 moves, 1-0 Ivkov vs Uhlmann, 1972 (A22) English, 43 moves, 1-0 Ivkov vs Janosevic, 1971 (A30) English, Symmetrical, 37 moves, 1-0 Ivkov vs A Dunkelblum, 1972 (A34) English, Symmetrical, 24 moves, 1-0 Ivkov vs Robatsch, 1972  (A36) English, 29 moves, 1-0 Ivkov vs J Sloth, 1972 (A16) English, 45 moves, 1-0 Ivkov vs Rossolimo, 1972  (A15) English, 49 moves, 1-0 Ivkov vs L Masic, 1972 (A36) English, 42 moves, 1-0 Ivkov vs Keene, 1972  (A36) English, 30 moves, 1-0 Ivkov vs E Torre, 1973  (A10) English, 52 moves, 1-0 Ivkov vs E Torre, 1973 (A36) English, 48 moves, 1-0 Ivkov vs E De Castro, 1973 (A30) English, Symmetrical, 45 moves, 1-0 Ivkov vs S Puc, 1973 (A13) English, 38 moves, 1-0 Ivkov vs H Ree, 1974  (A12) English with b3, 39 moves, 1-0 Ivkov vs J Qi, 1979 (A15) English, 48 moves, 1-0 Ivkov vs S Makarichev, 1983 (A13) English, 39 moves, 1-0 Ivkov vs M Todorovic, 1984 (A14) English, 43 moves, 1-0 Ivkov vs J Piket, 1985  (A15) English, 45 moves, 1-0 Ivkov vs G de Boer, 1985 (A15) English, 38 moves, 1-0 Ivkov vs N Velez Betancourt, 1985 (A15) English, 46 moves, 1-0 Ivkov vs A Yap, 1985 (A42) Modern Defense, Averbakh System, 39 moves, 1-0 Ivkov vs P Bauer, 1986 (A15) English, 27 moves, 1-0 Ivkov vs M Mrdja, 1988 (A15) English, 31 moves, 1-0 Ivkov vs M Daumens, 1989 (A15) English, 40 moves, 1-0 Ivkov vs Z S Ilic, 1989 (A25) English, 46 moves, 1-0 Ivkov vs F Prada Rubin, 1992 (A15) English, 28 moves, 1-0 Ivkov vs F Garcia Trobat, 1990 (A15) English, 35 moves, 1-0 Ivkov vs J Koch, 1995 (A13) English, 43 moves, 1-0 Ivkov vs C Bernard, 1995 (A17) English, 32 moves, 1-0 Ivkov vs V Damjanovic, 1995 (A15) English, 46 moves, 1-0 Ivkov vs K Arakhamia-Grant, 1992 (A15) English, 58 moves, 1-0 Ivkov vs S Mirkovic, 1991 (A15) English, 61 moves, 1-0 Suba vs H Ree, 1980 (A10) English, 73 moves, 1-0 Suba vs I Asmundsson, 1978 (A10) English, 51 moves, 1-0 Suba vs A Molina, 1994  (A10) English, 29 moves, 1-0 Suba vs Tukmakov, 1989 (A90) Dutch, 37 moves, 1-0 K Spraggett vs Dzindzichashvili, 1984 (A10) English, 33 moves, 1-0 50 games