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Top 10 active players as of June 30, 1980

  #  

Player Rating +/-
1 Karpov, Anatoly E280350
2 Korchnoi, Viktor L276949
3 Portisch, Lajos271950
4 Polugaevsky, Lev A271050
5 Kasparov, Garry K269952
6 Tal, Mikhail269349
7 Spassky, Boris V269349
8 Geller, Efim P268851
9 Timman, Jan H267948
10 Petrosian, Tigran V267749

About these ratings

Top 500 active players as of June 30, 1980

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E28035054.8% #229.10
2 Korchnoi, Viktor L27694922.8% #549.27
3 Portisch, Lajos2719504.3% #1643.24
4 Polugaevsky, Lev A2710502.9% #1945.61
5 Kasparov, Garry K2699522.4% #2317.21
6 Tal, Mikhail2693491.3% #2543.64
7 Spassky, Boris V2693491.4% #2543.42
8 Geller, Efim P2688511.4% #2855.33
9 Timman, Jan H2679480.6% #3228.54
10 Petrosian, Tigran V2677490.7% #3351.04
11 Beliavsky, Alexander G2677500.7% #3426.54
12 Romanishin, Oleg M2666490.3% #4028.47
13 Hübner, Robert2665500.3% #4131.65
14 Mecking, Henrique2664681.8% #5028.44
15 Balashov, Yury S2662500.3% #4331.30
16 Andersson, Ulf2659480.2% #4329.01
17 Larsen, Bent2657480.2% #4645.32
18 Hort, Vlastimil2649480.1% #5136.47
19 Ribli, Zoltán2646500.1% #5428.81
20 Miles, Anthony J2639470.1% #5725.19
21 Ljubojevic, Ljubomir2638490.1% #5929.66
22 Tseshkovsky, Vitaly V2638500.1% #6035.76
23 Gufeld, Eduard E2637550.2% #6444.28
24 Vaganian, Rafael A2636490.1% #6128.71
25 Dolmatov, Sergey V2635530.1% #6421.36
26 Jussupow, Artur M2633530.1% #6520.38
27 Gulko, Boris F2633540.1% #6733.39
28 Vasiukov, Evgeny A2632580.2% #6947.32
29 Lerner, Konstantin Z2632560.2% #6930.34
30 Psakhis, Lev B2631610.2% #7221.59
31 Savon, Vladimir A2629580.2% #7139.76
32 Mikhalchishin, Adrian B2627520.1% #7025.62
33 Sveshnikov, Evgeny E2627510.1% #7030.38
34 Gheorghiu, Florin262649 #7036.23
35 Kholmov, Ratmir D2625560.1% #7555.13
36 Dzindzichashvili, Roman Y262353 #7536.15
37 Rashkovsky, Nukhim N2617560.1% #8134.20
38 Sosonko, Gennadi261549 #7837.12
39 Browne, Walter S261449 #8031.47
40 Kuzmin, Gennady P261451 #8134.45
41 Kupreichik, Viktor D261253 #8530.98
42 Sax, Gyula261049 #8329.03
43 Parma, Bruno2610570.1% #8838.50
44 Dvoretsky, Mark I2609650.1% #9432.56
45 Palatnik, Semen A2609660.2% #9530.26
46 Unzicker, Wolfgang260955 #8855.01
47 Kavalek, Lubomir260851 #8736.89
48 Makarichev, Sergey Y260852 #8726.62
49 Dorfman, Iosif D260853 #8828.16
50 Smyslov, Vassily V260751 #8759.27
51 Ivanov, Igor V2607710.3% #9933.48
52 Bagirov, Vladimir K260554 #9143.87
53 Kochiev, Alexander260555 #9324.26
54 Gipslis, Aivars2603620.1% #9943.39
55 Tukmakov, Vladimir B260252 #9334.29
56 Ivkov, Borislav260150 #9246.63
57 Kurajica, Bojan260153 #9432.62
58 Smejkal, Jan259849 #9434.27
59 Georgadze, Tamaz V259852 #9632.64
60 Razuvaev, Yury S259552 #9934.72
61 Alburt, Lev O259452 #10034.86
62 Gligoric, Svetozar259350 #10057.41
63 Adorján, András259149 #10130.25
64 Liberzon, Vladimir M258851 #10543.27
65 Nunn, John D M258851 #10625.18
66 Evans, Larry M258663 #11548.27
67 Tarjan, James E258655 #11028.36
68 Bronstein, David I258057 #11656.36
69 Olafsson, Fridrik257958 #11945.43
70 Szabó, László257763 #12363.28
71 Pfleger, Helmut257659 #12236.90
72 Petrosian, Arshak B257659 #12226.54
73 Taimanov, Mark E257459 #12354.40
74 Seirawan, Yasser257451 #11820.27
75 Vitolinš, Alvis257458 #12434.04
76 Ubilava, Elizbar E257466 #12929.84
77 Suetin, Alexey S257360 #12653.62
78 Ftácnik, Lubomír257051 #12222.67
79 Panno, Oscar R257051 #12345.29
80 Chekhov, Valery A256768 #13724.59
81 Matanovic, Aleksandar256462 #13550.10
82 Kharitonov, Andrey Y256460 #13421.24
83 Stean, Michael F256249 #12826.82
84 Darga, Klaus V256261 #13746.35
85 Byrne, Robert E255950 #13252.19
86 Tseitlin, Mikhail S255954 #13433.04
87 Lombardy, William J255857 #13642.57
88 Klovans, Janis255771 #14645.22
89 Kapengut, Albert Z255766 #14335.98
90 Quinteros, Miguel A255750 #13532.51
91 Lein, Anatoly255651 #13549.26
92 Ivanov, Alexander V255661 #14124.16
93 Zaitsev, Igor A255555 #13842.09
94 Nemet, Ivan255555 #13937.21
95 Knaak, Rainer F255551 #13727.29
96 Matulovic, Milan255462 #14445.05
97 Panchenko, Alexander N255362 #14426.73
98 Luczak, Andrzej255355 #14031.57
99 Antoshin, Vladimir S255360 #14451.13
100 Csom, István255250 #13840.08
101 Grigorian, Karen A255054 32.81
102 Timoshchenko, Gennady255055 31.17
103 Shamkovich, Leonid A255051 57.08
104 Filip, Miroslav254961 51.67
105 Pachmann, Ludek254759 56.13
106 Tringov, Georgy P254659 43.31
107 Vogt, Lothar H254549 28.45
108 Uhlmann, Wolfgang254551 45.25
109 Speelman, Jonathan S254451 23.74
110 Yurtaev, Leonid254463 21.16
111 Kovacevic, Vladimir254357 38.26
112 Bukic, Enver254357 42.58
113 Veingold, Aleksander254168 26.72
114 Najdorf, Miguel254053 70.21
115 Ree, Hans254049 35.79
116 Nei, Iivo253965 48.66
117 Pintér, József253755 26.64
118 Kaplan, Julio P253660 29.92
119 Rogoff, Kenneth S253460 27.27
120 Faragó, Iván253249 34.24
121 Gruenfeld, Yehuda253255 24.34
122 Christiansen, Larry M253252 24.01
123 Lputian, Smbat G253157 22.38
124 Nikolac, Juraj253155 48.19
125 Vukic, Milan253155 36.86
126 Díez del Corral, Jesús252860 47.23
127 Reshevsky, Samuel H252758 68.59
128 Peresipkin, Vladimir252767
129 Zaltsman, Vitaly F252557 38.68
130 Piasetski, Leon David252571
131 Radulov, Ivan252557 41.48
132 Magerramov, Elmar S252458 22.22
133 Stoica, Valentin252463 30.37
134 Torre, Eugenio252450 28.65
135 Peters, John A252255 29.39
136 Petrushin, Alexander I252167 33.30
137 Eingorn, Viacheslav S252173 23.60
138 Weinstein, Norman251967 29.74
139 Malich, Burkhard G251958 43.59
140 Marjanovic, Slavoljub251852 25.48
141 Knezevic, Milorad251852 43.66
142 Lukin, Andrei M251871 31.84
143 Gurgenidze, Bukhuti I251770 46.63
144 Keene, Raymond251753
145 Anikaev, Yury251758 32.00
146 Kakageldyev, Amanmurad251666 30.51
147 Schmidt, Wlodzimierz251551 37.22
148 Biyiasas, Peter251552 29.61
149 Lutikov, Anatoly S251564 47.40
150 Schneider, Lars Ake251555
151 Benko, Pal C251459 51.95
152 Velimirovic, Dragoljub251352 38.13
153 Tatai, Stefano251356 42.27
154 Popov, Luben251157 44.42
155 Vorotnikov, Vladislav V250967 32.87
156 Bleiman, Yaacov250864 32.81
157 Mnatsakanian, Eduard A250857 41.56
158 Marangunic, Srdjan250867 36.66
159 Suba, Mihai250653 33.08
160 Vokác, Marek250558 21.56
161 Hecht, Hans-Joachim250566 41.42
162 Sunye Neto, Jaime250353 23.16
163 Bilek, István250359 47.88
164 Regan, Kenneth250364 20.80
165 Moiseev, Oleg L250262 55.15
166 Polovodin, Igor A250268 25.27
167 Mariotti, Sergio250259 33.89
168 Donner, Johannes H250155 52.98
169 Padevsky, Nikola B250159 47.09
170 Vladimirov, Evgeny Y250067 23.44
171 Sturua, Zurab250065 21.06
172 García Gonzáles, Guillermo249954 26.56
173 Jansson, Borje249966 38.30
174 Hulak, Krunoslav249863 29.10
175 Kraidman, Yair249763 47.66
176 Kirov Ivanov, Nino249653 34.81
177 Langeweg, Kick249552 43.31
178 Makropoulos, Georgios249460 26.76
179 Barczay, Laszlo249453 44.36
180 Lukacs, Peter249352 29.97
181 Grefe, John A249264 32.81
182 Diesen, Mark C249259
183 Zaichik, Gennady L249263 23.38
184 Ungureanu, Emil249173 43.66
185 Piesina, Gintautas249169 28.23
186 Minic, Dragoljub249171 43.32
187 Rodriguez, Amador249057 23.81
188 van der Wiel, John T H249051 20.89
189 Sigurjónsson, Gudmundur249053 32.76
190 Lechtynsky, Jiri249053 32.60
191 Zuckerman, Bernard249069 37.25
192 Zilberstein, Valery I248969 37.21
193 Marovic, Dražen248862 42.46
194 Plachetka, Jan248850 35.37
195 Popovic, Petar248857 21.38
196 Ghinda, Mihail Viorel248653 30.92
197 Soltis, Andrew E248667 33.09
198 Ermenkov, Evgenij248553 30.75
199 Petkevich, Jusefs248570 39.53
200 Commons, Kim S248574 28.93
201 Rogulj, Branko248556 28.91
202 Hazai, Laszlo248457 27.04
203 Mednis, Edmar J248454 43.27
204 Jansa, Vlastimil248451 37.59
205 Wedberg, Tom248354 26.59
206 Gaprindashvili, Nona248264 39.16
207 Musil, Vojko248169 34.87
208 Calvo Minguez, Ricardo248071 36.69
209 Ciocaltea, Victor247756 48.45
210 Chernin, Alexander M247774 20.31
211 Ivanovic, Božidar247552 33.85
212 Espig, Lutz247551 31.48
213 Forintos, Gyözö V247557 44.91
214 Sahovic, Dragutin247355 39.89
215 Van Wijgerden, Cornelis247255 30.10
216 Hartston, William R247256 32.88
217 Jakobsen, Ole247156 37.70
218 Bradford, Joseph M247163 29.66
219 Hug, Werner247162 27.80
220 Hennings, Artur247065 39.96
221 Kuligowski, Adam247051 24.52
222 Hamann, Svend246965 39.73
223 Robatsch, Karl246957 51.71
224 Vadasz, Laszlo246953 32.42
225 Karner, Hillar246875 44.92
226 Borik, Otto246865 32.76
227 Prandstetter, Eduard246751 31.54
228 Rath, Ulrik246772 33.51
229 Rytov, Boris246769
230 Lederman, Leon246769 33.10
231 Hernandez, Roman246756 30.60
232 Jelen, Iztok246768 33.45
233 Ligterink, Gert246650 30.62
234 Ambroz, Jan246657 26.03
235 Lengyel, Levente246654 47.05
236 Westerinen, Heikki MJ246654 36.17
237 Inkiov, Ventzislav246556 24.11
238 Cebalo, Mišo246572 35.40
239 Messing, Hrvoje246573 39.92
240 Szekely, Peter246559 25.39
241 Hausner, Ivan246556 28.21
242 Damjanovic, Mato246558 53.27
243 Ornstein, Axel246455 28.18
244 Karaklajic, Nikola246470 54.35
245 Vooremaa, Andres246369 35.94
246 Gavrikov, Victor N246163 22.91
247 Karlsson, Lars246152 24.96
248 Ghitescu, Theodor246155 46.43
249 Portisch, Ferenc246056 41.22
250 Castro Rojas, Oscar Humberto246059 27.14
251 Kunsztowicz, Uwe245968 36.45
252 Bisguier, Arthur B245959 50.73
253 Rajkovic, Dusan245957 38.04
254 Kaufman, Larry C245966 32.62
255 Szmetan, Jorge245854 30.09
256 Spassov, Liuben245853 37.27
257 Raicevic, Vladimir245857 31.16
258 Gerusel, Mathias245766 42.40
259 Garcia, Raimundo245666 44.09
260 Przewoznik, Jan245557 22.79
261 Mochalov, Evgeny V245471 28.67
262 Bönsch, Uwe245453 21.71
263 Řgaard, Leif245463 28.48
264 Gutman, Lev245365 34.76
265 Honfi, Karoly245367 49.68
266 Schussler, Harry245152 23.02
267 Debarnot, Roberto245163 32.90
268 Planinc, Albin245057 36.20
269 Adamski, Jan244951 36.63
270 Garcia, Gildardo244963 26.31
271 Schweber, Samuel244858 43.95
272 Mikenas, Vladas244772 70.20
273 Chandler, Murray G244754 20.24
274 Rukavina, Josip244667 37.59
275 Pytel, Krzysztof244656 35.12
276 Rodriguez Vargas, Orestes244660 36.98
277 Chiburdanidze, Maia G244455 19.45
278 Haik, Aldo244462 27.70
279 Bohm, Hans244251 30.46
280 Plaskett, Jim244260 20.28
281 Qi Jingxuan244162 32.64
282 Taulbut, Shaun M244159 22.47
283 Pomar Salamanca, Arturo244168 48.83
284 Rubinetti, Jorge A244055 35.25
285 Liebert, Heinz244065 44.10
286 Hansson, Dan244068 28.05
287 Dely, Peter244067 45.98
288 Azmaiparashvili, Zurab A243969 20.29
289 Meduna, Eduard243957 29.80
290 Zichichi, Alvise243962 41.98
291 Sydor, Andrzej243863 43.49
292 Minev, Nikolay N243866 49.48
293 Burger, Karl243868 47.44
294 Mestel, A Jonathan243753 23.30
295 Groszpeter, Attila243754 20.06
296 Botterill, George Steven243757
297 Garcia Martinez, Silvino243754 35.98
298 Pétursson, Margeir243656 20.37
299 Georgiev, Krum243570 22.10
300 Ostojic, Predrag243563 42.36
301 Balinas, Rosendo Carrean243564
302 Barle, Janez243462 28.27
303 Haygarth, Michael J243475
304 Wirthensohn, Heinz243463 29.15
305 Flesch, Janos243474 46.75
306 Joksic, Sinisa243463 39.72
307 Brinck Claussen, Bjorn243459
308 Bednarski, Jacek B243357 41.30
309 Rocha, Antonio243370 36.05
310 Doda, Zbigniew243263 49.36
311 Arnason, Jon L243254 19.63
312 Spiridonov, Nikola243253 42.34
313 Horner, Jeff243272 30.85
314 Sideif Sade, Fikret I243170 28.49
315 Tischbierek, Raj243159 17.77
316 Pribyl, Josef243152 32.72
317 Klaric, Zlatko243166 23.68
318 Duer, Arne243161 20.96
319 Martinovic, Slobodan243059 34.92
320 Sloth, Jorn243070 35.82
321 Djuric, Stefan242964 24.92
322 Vilela, Jose Luis242857 27.28
323 Trapl, Jindrich242760 38.27
324 Tompa, Janos242756 33.17
325 Vera, Reynaldo242776 19.48
326 Matera, Salvatore Joseph242762
327 Birnboim, Nathan242765 29.59
328 Kuijpers, Franciscus Antonius242764
329 Enklaar, Bertus F242761
330 Rodriguez, Ruben242661 33.56
331 Cramling, Dan242666 21.40
332 Morris, Walter D242663 21.83
333 Augustin, Josef242556 38.12
334 Velikov, Petar242469 29.25
335 Bielczyk, Jacek242354 27.35
336 Ekstroem, Roland242373 24.11
337 Van der Sterren, Paul242352 24.29
338 Grinberg, Ricardo242375 32.46
339 Sisniega, Marcel242264 20.92
340 Sznapik, Aleksander242251 29.39
341 Kestler, Hans-Günter242172 40.55
342 Cvetkovic, Srdjan242161 34.34
343 Ostermeyer, Peter242071 36.72
344 Bohosjan, Sarkis241966 39.26
345 Harandi, Khosro241960 29.83
346 Bellon Lopez, Juan Manuel241959 30.14
347 Clemens, Christian241969 39.90
348 Goodman, David SC241963
349 Hase, Juan Carlos241862
350 Hoelzl, Franz241755 34.23
351 Bellin, Robert241653 27.99
352 Ilic, Zoran241667 16.91
353 Mascarinas, Rico241563 27.33
354 Short, Nigel D241554 15.08
355 Zapata, Alonso241559 21.86
356 Jamieson, Robert Murray241565
357 Dobosz, Henryk241454 27.28
358 Janoševic, Dragoljub241461 56.97
359 Littlewood, John Eric241468
360 Franco Ocampos, Zenon241458 24.13
361 Webb, Simon241360 31.05
362 Pavlov, Mircea241363 42.79
363 Gruenberg, Hans Ulrich241365 24.47
364 Strauss, David J241267 33.90
365 Hartoch, Robert G241261
366 Watson, John L241267 28.82
367 Fedorowicz, John P241153 21.76
368 Cuartas, Carlos241165 39.87
369 Dueckstein, Andreas241065 52.91
370 Pritchett, Craig William240970
371 Kristiansen, Jens240855 28.10
372 Hoi, Carsten240755 23.45
373 Rohde, Michael A240772 20.84
374 Nogueiras, Jesus240767 20.95
375 Skrobek, Ryszard240757 28.98
376 Toth, Bela240660 37.20
377 Pokojowczyk, Jerzy240555 31.36
378 Fedder, Steen240459 29.04
379 Cámpora, Daniel H240365 22.99
380 Ciric, Dragoljub M240366 44.63
381 Nicevski, Risto240356 35.01
382 Law, Andrew P240368 29.97
383 Emma, Jaime J240257 42.45
384 Ost Hansen, Jacob240274
385 Bouaziz, Slim240158 30.20
386 Wittmann, Walter240163 32.30
387 De Bruycker, Bernard240173 39.04
388 Biriescu, Ioan239970 26.68
389 Schiffer, Karl Josef239971
390 Deze, Anton239974
391 Huss, Andreas239974 29.71
392 Gruchacz, Robert239865 26.58
393 Franklin, Michael J239774 49.41
394 Van Riemsdijk, Herman C239754 31.84
395 Coudari, Camille239766 28.91
396 Cappello, Renato239667
397 Lombard, Andre239667 29.78
398 Bronstein, Luis239556 34.08
399 Sibarevic, Milenko239569 35.30
400 Kagan, Shimon239554 38.23
401 Balshan, Amikam239461
402 Swic, Waldemar239463 27.30
403 Szymczak, Zbigniew239360 28.49
404 Despotovic, Momcilo239370 32.32
405 Iskov, Gert239357 31.92
406 Moehring, Guenther239256 43.60
407 Foygel, Igor239272
408 Taylor, Timothy239274 27.39
409 Visier Segovia, Fernando239268 37.41
410 Welin, Thomas239268 20.82
411 Peev, Peicho Chonev239168 40.24
412 Kengis, Edvins239176 21.22
413 Jacobsen, Bo239075 31.55
414 Garcia Padron, Jose239073 22.27
415 Odendahl, Steven M238961 20.68
416 Lau, Ralf238966 20.70
417 Nikolic, Predrag238869 19.80
418 Cording, Harm238869 43.47
419 Gonsior, Evzen238759 48.56
420 Bojkovic, Slobodan238775 34.92
421 Lanc, Alois238675 32.37
422 Banas, Jan238555 33.07
423 Lanka, Zigurds238569 20.11
424 Rigo, Janos238557 31.67
425 Segal, Alexandru Sorin238462 32.74
426 Neckar, Lubomir238465 29.91
427 Renman, Nils Gustaf238364
428 Borm, Franciscus WM238360
429 Cuasnicu, Oscar238366 37.68
430 Horvath, Tamas238363 28.69
431 Jamroz, Zbigniew238261 46.05
432 Soos, Bela238275 50.31
433 Lieb, Harald238268 45.51
434 Whiteley, Andrew J238265 33.06
435 Watzka, Horst238165 41.80
436 Henley, Ron W238167 23.57
437 Van der Vliet, Fredrik238060
438 Djukic, Zeljko237871 21.05
439 Garcia Palermo, Carlos237862 26.58
440 Rajna, George237767 33.38
441 Paehtz, Thomas Sr237763 23.82
442 Mišta, Ladislav237668 36.66
443 Schinzel, Wladyslaw237551 37.11
444 Andres Mendez, Miguel237570
445 Cooper, John Grantley237571
446 Danner, Georg237460 33.68
447 Szilágyi, György237475 58.98
448 Littlewood, Paul E237359 24.45
449 Rossetto, Héctor D237365 57.81
450 Benjamin, Joel L237361 16.30
451 Helmers, Knut J237365 23.40
452 Filguth, Rubens A237367 24.27
453 Pavlovic, Dejan237271
454 Mortensen, Erling237261 25.23
455 Grigorov, Jordan N237165 26.56
456 Scheeren, Peter237159 24.91
457 Olafsson, Helgi237159 23.87
458 deFirmian, Nicholas E237066 22.92
459 Kaiszauri, Konstanty237055 27.68
460 Fries Nielsen, Jens Ove236957 20.35
461 Brondum, Eric236865 38.54
462 Hebden, Mark236764 22.37
463 Root, Douglas236466 17.38
464 Formanek, Edward W236466 38.15
465 Sapi, Laszlo236467 45.28
466 Adamski, Andrzej236361 41.46
467 Nun, Jiri236362 22.92
468 Hebert, Jean236256 22.63
469 Trois, Francisco RT236154
470 Sikora Lerch, Jan236054
471 Hvenekilde, Jorgen236067 44.84
472 Kelecevic, Nedeljko235970 33.30
473 Filipowicz, Andrzej235964 42.13
474 Angantysson, Haukur235962 31.58
475 Gross, Stefan235959 30.84
476 Fuller, Maxwell L235860 35.42
477 Orso, Miklos235859 24.06
478 Petran, Pal235856 33.79
479 Rantanen, Yrjo A235763 30.19
480 Ionescu, Constantin235767 21.80
481 Barreras, Alberto235675 29.23
482 Wahlbom, Magnus235573 35.12
483 Basman, Michael J235367 34.29
484 Day, Lawrence A235370 31.41
485 Lebredo, Gerardo235263 29.91
486 Niklasson, Christer235157 27.49
487 Lekander, Rolf235165 33.49
488 Braga, Fernando235061 21.97
489 Frias, Victor J235066 24.39
490 Holm, Sejer234965 40.89
491 Rosenlund, Thorbjorn234875 29.03
492 Maciejewski, Andrzej234864 28.97
493 Kovacs, Laszlo M234858 41.73
494 Ardiansyah, Haji234767 28.57
495 Kouatly, Bachar234676 22.32
496 Rakic, Tomislav234661 45.63
497 Tichy, Vladimir234470 33.74
498 De Savornin Lohman, A.234376
499 Witkowski, Stefan234363 48.76
500 Svensson, Bengt234176 19.97

These ratings, calculated as of June 30, 1980, incorporate all games (against rated opponents) played in the time between July 1, 1979 and June 30, 1980, along with the ratings that were already calculated as of June 30, 1979. Players who have played an insufficient number of games in recent years will not appear on the list, even though you may see them on previous and/or subsequent lists. Any players who have been completely inactive for three years are removed from the list.

Definition of columns in the above list:

# refers to the player's world rank on this list.

Player is the full name of the player. Click on the player's name to see a career progression of the player's ratings.

Rating is the calculated rating for the player, as of June 30, 1980. This represents the player's estimated strength on July 1, 1980.

+/- is the standard deviation of the player's rating estimate. It is based on a geometric average of the number of rated games played in past years. Players who play very frequently will have a smaller +/- value, indicating a greater confidence in the accuracy of their rating. Players whose +/- value exceeds 76 are classified as "inactive" and removed from the ranking list due to their infrequent play against rated opponents. Mathematically, a player's rating is an estimate of their exact strength on July 1, 1980. The +/- value represents the standard deviation of that estimate; the player's true strength on July 1, 1980 should be within one standard deviation of their calculated rating approximately 68% of the time, and within two standard deviations of their calculated rating approximately 95% of the time.

Best? is the estimated likelihood that the player was actually the strongest player in the world on July 1, 1980. Since ratings are known to be inaccurate, it is possible that a lower-rated player is actually much stronger than their rating would indicate, and it is also possible that other players are weaker than their ratings would indicate. This number indicates the likelihood that the player is indeed the strongest player in the world. On a particular list, it will add up to 100% across the complete list of all players. This value is only calculated for the top 100 players on any rating list.

75%? gives a 75%-confidence world ranking for the player. Because ratings are known to be inaccurate, even if a particular player is rated third in the world, we cannot say with 100% certainty that they are truly one of the three strongest players in the world. This number indicates the world rank that we are 75% sure the player is "no worse than". Thus if a player has a value of #12 in this column, we are 75% sure that the player is one of the twelve strongest players in the world. This value is only calculated for the top 100 players on any rating list.

Age is the player's exact age in years, on June 30, 1980. If a player's age is displayed as a link, that means that this rating was active at the time of their next birthday. Click on the link to see the sorted list of all players' ratings on their birthdays when turning that same age.

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