Odense Odense DEN· Jul 22 – 29, 1980 | Jul 22 – 29, 1980 | Classical | 24 | 2324 | 65 |
| Ottawa Can.OpenOttawa Can.Open· Jul 19 – 27, 1980 | Jul 19 – 27, 1980 | Classical | 11 | 1796 | 10 |
CAN Open 17th Ottawa CAN· Jul 20 – 27, 1980 | Jul 20 – 27, 1980 | Classical | 12 | 2041 | 10 |
CAN-op Ottawa CAN· Jul 19 – 27, 1980 | Jul 19 – 27, 1980 | Classical | 48 | 1870 | 43 |
Biel Biel SUI Biel Biel SUI· Jul 26, 1980 | Jul 26, 1980 | Classical | 11 | 2298 | 18 |
| Schilde Open U20Schilde· Jul 17 – 25, 1980 | Jul 17 – 25, 1980 | Classical | 18 | 2241 | 76 |
Paul Masson Memorial Saratoga Springs, NY USA· Jul 19 – 20, 1980 | Jul 19 – 20, 1980 | Classical | 30 | 2272 | 25 |
GRE Ch U18 Athens GRE· Jul 9 – 20, 1980 | Jul 9 – 20, 1980 | Classical | 18 | 2086 | 23 |
| SCO ChTroon· Jul 12 – 18, 1980 | Jul 12 – 18, 1980 | Classical | 14 | 2260 | 31 |
Robert Silk International Fellowship London ENG· Jul 6 – 16, 1980 | Jul 6 – 16, 1980 | Classical | 11 | 2340 | 9 |
| North ChampionshipNorth Greece ch· Jun 9 – Jul 3, 1980 | Jun 9 – Jul 3, 1980 | Classical | 13 | 1994 | 16 |
Candidats sf2 Buenos Aires ARG· 1980 | 1980 | Classical | 2 | 2665 | 13 |
SWE Ch Lulea SWE· 1980 | 1980 | Classical | 9 | 2314 | 7 |
NWC July Open Seattle, WA USA· 1980 | 1980 | Classical | 28 | 2131 | 19 |
| SalgotarjanSalgotarjan· 1980 | 1980 | Classical | 14 | 2123 | 51 |
| Hornicky KahanecKarvina· 1980 | 1980 | Classical | 14 | 2352 | 84 |
Estival Montreal CAN· Jun 28 – 30, 1980 | Jun 28 – 30, 1980 | Classical | 12 | 1813 | 10 |
Montreal Festival Montreal CAN· Jun 28 – 30, 1980 | Jun 28 – 30, 1980 | Classical | 6 | 2116 | 5 |
Sarajevo Sarajevo BIH· Mar 16 – Jun 26, 1980 | Mar 16 – Jun 26, 1980 | Classical | 19 | 2465 | 102 |
Greenville ch-USA Greenville ch-USA· Jun 12 – 19, 1980 | Jun 12 – 19, 1980 | Classical | 17 | 2468 | 111 |
Quilmes ch-ARG Quilmes ch-ARG· May 28 – Jun 18, 1980 | May 28 – Jun 18, 1980 | Classical | 29 | 2344 | 132 |
| ZemunZemun· Jun 2 – 16, 1980 | Jun 2 – 16, 1980 | Classical | 19 | 2350 | 132 |
Las Palmas Las Palmas ESP· Jun 10, 1980 | Jun 10, 1980 | Classical | 14 | 2407 | 37 |
Ireland -v- Wales Dublin IRL· Jun 7 – 8, 1980 | Jun 7 – 8, 1980 | Classical | 10 | 2204 | 5 |
Wroclaw-A Wroclaw POL· May 23 – Jun 5, 1980 | May 23 – Jun 5, 1980 | Classical | 14 | 2375 | 89 |
Capablanca mem-A Cienfuegos City CUB· May 20 – Jun 4, 1980 | May 20 – Jun 4, 1980 | Classical | 15 | 2400 | 55 |
Wroclaw-B Wroclaw POL· May 23 – Jun 3, 1980 | May 23 – Jun 3, 1980 | Classical | 12 | 2235 | 61 |
| Warszawa CupWarszawa Cup· May 23 – Jun 2, 1980 | May 23 – Jun 2, 1980 | Classical | 11 | 2416 | 43 |
It Erevan ARM· 1980 | 1980 | Classical | 12 | 2471 | 11 |
| IBMAmsterdam II· 1980 | 1980 | Classical | 6 | 2457 | 6 |
IBM Amsterdam Amsterdam NED· 1980 | 1980 | Classical | 8 | 2583 | 10 |
IBM KG Amsterdam NED· 1980 | 1980 | Classical | 7 | 2599 | 20 |
| Smederevska PalankaSmederevska Palanka· 1980 | 1980 | Classical | 18 | 2401 | 40 |
Yerevan Erevan ARM· 1980 | 1980 | Classical | 22 | 2482 | 148 |
IBM Amsterdam NED· 1980 | 1980 | Classical | 12 | 2562 | 50 |
| Kopenhagen OpenKopenhagen open· 1980 | 1980 | Classical | 51 | 2288 | 143 |
Politiken Cup Copenhagen DEN· 1980 | 1980 | Classical | 47 | 2289 | 89 |
IBM-B Amsterdam NED· 1980 | 1980 | Classical | 13 | 2450 | 72 |
| dkch-jr Vordingborgdkch-jr Vordingborg· 1980 | 1980 | Classical | 32 | 2199 | 93 |
| Staffordshire Open· May 24 – 27, 1980 | May 24 – 27, 1980 | Classical | 7 | 2046 | 6 |
Cienfuegos Cienfuegos City CUB· May 27, 1980 | May 27, 1980 | Classical | 15 | 2204 | 9 |
Chess Set Memorial Day Los Angeles, CA USA· May 24 – 26, 1980 | May 24 – 26, 1980 | Classical | 6 | 2145 | 5 |
| Team Championship A Categorie· Feb 10 – May 25, 1980 | Feb 10 – May 25, 1980 | Classical | 12 | 2225 | 11 |
Varna 19th Varna BUL· May 15 – 25, 1980 | May 15 – 25, 1980 | Classical | 13 | 2293 | 19 |
| Rostov on Don ttRostov on Don· May 23 – 24, 1980 | May 23 – 24, 1980 | Classical | 63 | 2360 | 61 |
Ontario Open Hamilton CAN· May 17 – 19, 1980 | May 17 – 19, 1980 | Classical | 12 | 2063 | 9 |
Spring/Printemps Open Montreal CAN· May 17 – 19, 1980 | May 17 – 19, 1980 | Classical | 7 | 1828 | 6 |
New York USA New York, NY USA· May 14, 1980 | May 14, 1980 | Classical | 8 | 2463 | 5 |
New York Heraldica New York, NY USA· May 11 – 14, 1980 | May 11 – 14, 1980 | Classical | 10 | 2435 | 27 |
| Hamburg Walter-RobinHamburg Walter-Robin· May 5 – 11, 1980 | May 5 – 11, 1980 | Classical | 8 | 2159 | 7 |