| page 3 of 10; games 51-75 of 237 |
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| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. Westerinen vs R Mateo |
| 1-0 | 38 | 1984 | Thessaloniki Olympiad | B12 Caro-Kann Defense |
| 52. R Mateo vs C Cuartas |
 | 0-1 | 43 | 1984 | Thessaloniki Olympiad | A53 Old Indian |
| 53. R Mateo vs M O Khan |
| 1-0 | 19 | 1984 | Thessaloniki Olympiad | B30 Sicilian |
| 54. R W Smith vs R Mateo |
| 1-0 | 40 | 1984 | Thessaloniki Olympiad | B24 Sicilian, Closed |
| 55. R Mateo vs Y Hasan |
| 1-0 | 38 | 1984 | Thessaloniki Olympiad | B43 Sicilian, Kan, 5.Nc3 |
| 56. I Abdelnabbi vs R Mateo |
| ½-½ | 47 | 1984 | Thessaloniki Olympiad | B33 Sicilian |
| 57. de Firmian vs R Mateo |
| 1-0 | 30 | 1985 | New York Open | B89 Sicilian |
| 58. R Mateo vs B Zuckerman |
| 0-1 | 40 | 1985 | New York Open | B95 Sicilian, Najdorf, 6...e6 |
| 59. R Mateo vs V Lukov |
| 1-0 | 31 | 1986 | Rio Gallegos fin-A | B93 Sicilian, Najdorf, 6.f4 |
| 60. K Spraggett vs R Mateo |
| 1-0 | 46 | 1986 | New York Open | A20 English |
| 61. B M Kogan vs R Mateo |
| 1-0 | 43 | 1986 | New York Open | E00 Queen's Pawn Game |
| 62. R Mateo vs R Byrne |
| 1-0 | 32 | 1986 | New York Open | B93 Sicilian, Najdorf, 6.f4 |
| 63. R Mateo vs P Popovic |
| 1-0 | 39 | 1986 | New York Open | B93 Sicilian, Najdorf, 6.f4 |
| 64. V Lukov vs R Mateo |
| 0-1 | 35 | 1986 | Rio Gallegos prel | E15 Queen's Indian |
| 65. Lombardy vs R Mateo |
| 1-0 | 25 | 1986 | New York Open | B63 Sicilian, Richter-Rauzer Attack |
| 66. Smejkal vs R Mateo |
| 1-0 | 52 | 1986 | Dubai Olympiad | A15 English |
| 67. Anand vs R Mateo |
| 1-0 | 35 | 1986 | Dubai Olympiad | B63 Sicilian, Richter-Rauzer Attack |
| 68. A Zapata vs R Mateo |
| ½-½ | 19 | 1986 | Dubai Olympiad | B90 Sicilian, Najdorf |
| 69. R Mateo vs J Xu |
| 0-1 | 71 | 1986 | Dubai Olympiad | C80 Ruy Lopez, Open |
| 70. R Mateo vs K Spraggett |
| ½-½ | 45 | 1986 | Dubai Olympiad | B31 Sicilian, Rossolimo Variation |
| 71. T Palmer vs R Mateo |
 | 0-1 | 31 | 1986 | Pan-Am Intercollegiate Team Championship | B23 Sicilian, Closed |
| 72. R Mateo vs Kotronias |
| ½-½ | 26 | 1988 | Thessaloniki Olympiad | B48 Sicilian, Taimanov Variation |
| 73. R Mateo vs Korchnoi |
| 0-1 | 36 | 1988 | Thessaloniki Olympiad | C14 French, Classical |
| 74. R Mateo vs S Atalik |
| ½-½ | 22 | 1988 | Thessaloniki Olympiad | B42 Sicilian, Kan |
| 75. J Yrjola vs R Mateo |
| ½-½ | 18 | 1988 | Thessaloniki Olympiad | E12 Queen's Indian |
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| page 3 of 10; games 51-75 of 237 |
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Kibitzing
