< July 31, 1980     Back to date list    September 30, 1980 >

Top 10 active players as of August 31, 1980

  #  

Player Rating +/-
1 Karpov, Anatoly E280850
2 Korchnoi, Viktor L275949
3 Polugaevsky, Lev A271949
4 Kasparov, Garry K270652
5 Portisch, Lajos270349
6 Spassky, Boris V269449
7 Tal, Mikhail269249
8 Geller, Efim P268951
9 Timman, Jan H268148
10 Petrosian, Tigran V267949

About these ratings

Top 500 active players as of August 31, 1980

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E28085061.0% #229.27
2 Korchnoi, Viktor L27594916.8% #649.44
3 Polugaevsky, Lev A2719494.1% #1545.78
4 Kasparov, Garry K2706523.0% #2117.38
5 Portisch, Lajos2703492.1% #2143.41
6 Spassky, Boris V2694491.5% #2543.59
7 Tal, Mikhail2692491.2% #2643.81
8 Geller, Efim P2689511.4% #2855.50
9 Timman, Jan H2681480.7% #3128.71
10 Petrosian, Tigran V2679490.7% #3251.21
11 Hübner, Robert2677490.6% #3431.82
12 Beliavsky, Alexander G2672500.6% #3726.71
13 Romanishin, Oleg M2671490.4% #3628.64
14 Andersson, Ulf2660480.3% #4329.18
15 Balashov, Yury S2659500.4% #4431.47
16 Mecking, Henrique2658701.6% #5528.61
17 Miles, Anthony J2648470.1% #5025.36
18 Larsen, Bent2648480.1% #5145.49
19 Hort, Vlastimil2644480.1% #5436.64
20 Ribli, Zoltán2644500.1% #5628.98
21 Lerner, Konstantin Z2642560.3% #6030.51
22 Gufeld, Eduard E2640550.2% #6044.45
23 Jussupow, Artur M2639520.1% #6020.55
24 Tseshkovsky, Vitaly V2638500.1% #6035.93
25 Gulko, Boris F2635550.1% #6533.56
26 Vaganian, Rafael A2634490.1% #6328.88
27 Vasiukov, Evgeny A2632580.2% #6947.49
28 Dolmatov, Sergey V2630540.1% #6821.53
29 Gheorghiu, Florin262849 #6736.40
30 Kholmov, Ratmir D2627570.2% #7255.30
31 Ljubojevic, Ljubomir262749 #6929.83
32 Psakhis, Lev B2626610.2% #7521.76
33 Mikhalchishin, Adrian B2623520.1% #7325.79
34 Sveshnikov, Evgeny E262051 #7530.55
35 Sosonko, Gennadi261949 #7437.29
36 Savon, Vladimir A2618560.1% #7939.92
37 Kuzmin, Gennady P261752 #7834.62
38 Makarichev, Sergey Y261752 #7926.79
39 Dzindzichashvili, Roman Y261553 #8036.32
40 Browne, Walter S261550 #7831.64
41 Rashkovsky, Nukhim N2611560.1% #8534.37
42 Palatnik, Semen A2611660.2% #9230.43
43 Georgadze, Tamaz V260952 #8632.81
44 Dvoretsky, Mark I2608680.2% #9632.73
45 Unzicker, Wolfgang260855 #8855.18
46 Dorfman, Iosif D260854 #8728.33
47 Kupreichik, Viktor D260753 #8731.16
48 Kochiev, Alexander260655 #8924.43
49 Parma, Bruno260657 #9138.67
50 Sax, Gyula260649 #8629.20
51 Ivkov, Borislav260650 #8846.80
52 Ivanov, Igor V2606710.2% #10133.65
53 Kavalek, Lubomir260552 #8837.06
54 Smyslov, Vassily V260551 #8859.44
55 Bagirov, Vladimir K260454 #9144.04
56 Gipslis, Aivars2601640.1% #10043.56
57 Razuvaev, Yury S260153 #9334.89
58 Kurajica, Bojan260153 #9332.79
59 Tukmakov, Vladimir B259953 #9534.46
60 Alburt, Lev O259852 #9635.03
61 Tarjan, James E259155 #10328.53
62 Smejkal, Jan259149 #10034.44
63 Adorján, András258950 #10330.42
64 Nunn, John D M258851 #10425.35
65 Liberzon, Vladimir M258852 #10543.44
66 Bronstein, David I258757 #10856.53
67 Seirawan, Yasser258551 #10720.44
68 Gligoric, Svetozar258550 #10757.58
69 Evans, Larry M258263 #11748.44
70 Taimanov, Mark E258259 #11654.57
71 Vitolinš, Alvis258058 #11734.21
72 Olafsson, Fridrik257958 #11745.60
73 Szabó, László257864 #12263.45
74 Suetin, Alexey S257561 #12253.79
75 Ubilava, Elizbar E257466 #12630.01
76 Petrosian, Arshak B257359 #12326.71
77 Panno, Oscar R257052 #12145.46
78 Ftácnik, Lubomír256951 #12222.84
79 Matanovic, Aleksandar256863 #13050.27
80 Pfleger, Helmut256660 #13137.07
81 Nemet, Ivan256256 #13237.38
82 Kharitonov, Andrey Y256160 #13421.41
83 Quinteros, Miguel A256051 #13032.68
84 Darga, Klaus V255961 #13746.52
85 Byrne, Robert E255751 #13352.36
86 Panchenko, Alexander N255762 #14026.90
87 Pachmann, Ludek255659 #14056.30
88 Stean, Michael F255549 #13426.98
89 Tseitlin, Mikhail S255556 #13833.21
90 Kapengut, Albert Z255566 #14436.16
91 Knaak, Rainer F255551 #13627.46
92 Zaitsev, Igor A255555 #13942.26
93 Timoshchenko, Gennady255456 #13931.34
94 Lombardy, William J255356 #14042.74
95 Antoshin, Vladimir S255260 #14251.30
96 Lein, Anatoly255251 #13949.43
97 Speelman, Jonathan S255251 #13823.91
98 Matulovic, Milan255261 #14445.22
99 Ivanov, Alexander V255160 #14324.33
100 Tringov, Georgy P255159 #14443.48
101 Grigorian, Karen A255054 32.98
102 Filip, Miroslav254968 51.84
103 Chekhov, Valery A254668 24.76
104 Veingold, Aleksander254468 26.89
105 Shamkovich, Leonid A254351 57.25
106 Bukic, Enver254257 42.75
107 Yurtaev, Leonid254263 21.33
108 Ree, Hans254249 35.95
109 Faragó, Iván254150 34.41
110 Kovacevic, Vladimir254156 38.43
111 Nei, Iivo253965 48.83
112 Nikolac, Juraj253956 48.36
113 Uhlmann, Wolfgang253751 45.42
114 Najdorf, Miguel253754 70.38
115 Pintér, József253555 26.81
116 Csom, István253450 40.25
117 Kaplan, Julio P253460 30.10
118 Rogoff, Kenneth S253461 27.44
119 Vukic, Milan253455 37.03
120 Lputian, Smbat G252957 22.55
121 Vogt, Lothar H252949 28.62
122 Díez del Corral, Jesús252964 47.40
123 Chernin, Alexander M252872 20.48
124 Peresipkin, Vladimir252767
125 Zaltsman, Vitaly F252657 38.85
126 Reshevsky, Samuel H252560 68.76
127 Schneider, Lars Ake252555
128 Klovans, Janis252561 45.39
129 Keene, Raymond252352
130 Torre, Eugenio252251 28.82
131 Magerramov, Elmar S252258 22.39
132 Gruenfeld, Yehuda252155 24.51
133 Weinstein, Norman252168 29.91
134 Eingorn, Viacheslav S252173 23.77
135 Petrushin, Alexander I252067 33.47
136 Knezevic, Milorad251853 43.83
137 Lukin, Andrei M251771 32.01
138 Marjanovic, Slavoljub251752 25.65
139 Gurgenidze, Bukhuti I251770 46.80
140 Biyiasas, Peter251752 29.78
141 Radulov, Ivan251656 41.65
142 Malich, Burkhard G251659 43.76
143 Christiansen, Larry M251652 24.18
144 Lutikov, Anatoly S251564 47.57
145 Kakageldyev, Amanmurad251466 30.68
146 Stoica, Valentin251463 30.54
147 Moiseev, Oleg L251372 55.32
148 Popov, Luben251358 44.59
149 Tatai, Stefano251257 42.44
150 Schmidt, Wlodzimierz251250 37.39
151 Anikaev, Yury251058 32.17
152 Velimirovic, Dragoljub251052 38.30
153 Bleiman, Yaacov251064 32.97
154 Piasetski, Leon David250971
155 Peters, John A250955 29.56
156 Vorotnikov, Vladislav V250867 33.04
157 Benko, Pal C250859 52.13
158 Mnatsakanian, Eduard A250857 41.73
159 Marangunic, Srdjan250767 36.83
160 Vokác, Marek250458 21.73
161 Kraidman, Yair250364 47.83
162 Hecht, Hans-Joachim250266 41.59
163 Barczay, Laszlo250252 44.53
164 Kirov Ivanov, Nino250253 34.97
165 Polovodin, Igor A250168 25.44
166 Sturua, Zurab250165 21.23
167 Donner, Johannes H250157 53.15
168 van der Wiel, John T H250152 21.06
169 Luczak, Andrzej250054 31.74
170 García Gonzáles, Guillermo250054 26.73
171 Vladimirov, Evgeny Y250067 23.61
172 Suba, Mihai249953 33.25
173 Jansson, Borje249971 38.47
174 Kuligowski, Adam249852 24.69
175 Rodriguez, Amador249858 23.97
176 Bilek, István249867 48.05
177 Padevsky, Nikola B249759 47.26
178 Ermenkov, Evgenij249653 30.92
179 Sunye Neto, Jaime249653 23.33
180 Wedberg, Tom249554 26.76
181 Ungureanu, Emil249473 43.83
182 Ghinda, Mihail Viorel249455 31.10
183 Makropoulos, Georgios249360 26.92
184 Lukacs, Peter249352 30.14
185 Regan, Kenneth249264 20.96
186 Hulak, Krunoslav249164 29.27
187 Plachetka, Jan249149 35.54
188 Zilberstein, Valery I249069 37.38
189 Zaichik, Gennady L249063 23.55
190 Grefe, John A248865 32.98
191 Minic, Dragoljub248871 43.49
192 Marovic, Dražen248862 42.63
193 Soltis, Andrew E248769 33.26
194 Lechtynsky, Jiri248754 32.77
195 Popovic, Petar248757 21.55
196 Karlsson, Lars248652 25.14
197 Zuckerman, Bernard248472 37.42
198 Hazai, Laszlo248457 27.21
199 Petkevich, Jusefs248470 39.70
200 Řgaard, Leif248462 28.65
201 Commons, Kim S248374 29.11
202 Mednis, Edmar J248355 43.44
203 Sahovic, Dragutin248256 40.06
204 Gaprindashvili, Nona248264 39.33
205 Rogulj, Branko248256 29.08
206 Musil, Vojko248269 35.04
207 Langeweg, Kick248253 43.48
208 Jansa, Vlastimil248152 37.76
209 Calvo Minguez, Ricardo248174 36.86
210 Ivanovic, Božidar247952 34.02
211 Mariotti, Sergio247958 34.06
212 Ciocaltea, Victor247855 48.62
213 Ornstein, Axel247854 28.35
214 Sigurjónsson, Gudmundur247853 32.93
215 Damjanovic, Mato247660 53.44
216 Forintos, Gyözö V247557 45.09
217 Spassov, Liuben247553 37.44
218 Piesina, Gintautas247575 28.40
219 Diesen, Mark C247461
220 Hartston, William R247355 33.05
221 Portisch, Ferenc247355 41.39
222 Karaklajic, Nikola247270 54.52
223 Bradford, Joseph M247163 29.83
224 Jelen, Iztok246968 33.62
225 Hansson, Dan246969 28.22
226 Hennings, Artur246965 40.14
227 Prandstetter, Eduard246952 31.71
228 Espig, Lutz246952 31.65
229 Rytov, Boris246969
230 Lederman, Leon246869 33.27
231 Karner, Hillar246875 45.09
232 Van Wijgerden, Cornelis246756 30.27
233 Szmetan, Jorge246655 30.26
234 Hausner, Ivan246656 28.38
235 Szekely, Peter246660 25.56
236 Borik, Otto246665 32.93
237 Cebalo, Mišo246572 35.57
238 Vooremaa, Andres246569 36.12
239 Inkiov, Ventzislav246556 24.28
240 Ambroz, Jan246557 26.20
241 Ligterink, Gert246550 30.79
242 Podzielny, Karl Heinz246463 25.97
243 Hamann, Svend246465 39.90
244 Bohm, Hans246351 30.63
245 Messing, Hrvoje246373 40.10
246 Mochalov, Evgeny V246371 28.84
247 Hernandez, Roman246357 30.77
248 Kunsztowicz, Uwe246368 36.62
249 Raicevic, Vladimir246257 31.33
250 Bisguier, Arthur B246259 50.90
251 Schweber, Samuel246159 44.12
252 Lengyel, Levente246054 47.22
253 Vadasz, Laszlo246053 32.59
254 Rajkovic, Dusan246057 38.21
255 Robatsch, Karl246058 51.88
256 Jakobsen, Ole245856 37.87
257 Gerusel, Mathias245766 42.57
258 Bönsch, Uwe245753 21.88
259 Gavrikov, Victor N245763 23.09
260 Kaufman, Larry C245666 32.79
261 Krnic, Zdenko245675 32.91
262 Chiburdanidze, Maia G245656 19.62
263 Schussler, Harry245553 23.19
264 Adamski, Jan245552 36.80
265 Garcia, Raimundo245466 44.26
266 Hug, Werner245359 27.97
267 Ghitescu, Theodor245255 46.60
268 Gutman, Lev245265 34.92
269 Westerinen, Heikki MJ245253 36.34
270 Honfi, Karoly245268 49.85
271 Castro Rojas, Oscar Humberto245160 27.31
272 Chandler, Murray G245153 20.41
273 Pétursson, Margeir245156 20.54
274 Mestel, A Jonathan245052 23.47
275 Debarnot, Roberto244863 33.07
276 Spiridonov, Nikola244854 42.51
277 Garcia, Gildardo244863 26.48
278 Planinc, Albin244759 36.37
279 Doda, Zbigniew244564 49.53
280 Rodriguez Vargas, Orestes244560 37.16
281 Pytel, Krzysztof244456 35.29
282 Cramling, Dan244462 21.57
283 Pomar Salamanca, Arturo244369 48.99
284 Qi Jingxuan244162 32.81
285 Dely, Peter244169 46.15
286 Liebert, Heinz244167 44.27
287 Velikov, Petar244067 29.42
288 Taulbut, Shaun M244058 22.64
289 Zichichi, Alvise243962 42.16
290 Georgiev, Krum243970 22.27
291 Rukavina, Josip243971 37.76
292 Balinas, Rosendo Carrean243866
293 Azmaiparashvili, Zurab A243769 20.46
294 Ostojic, Predrag243764 42.53
295 Botterill, George Steven243760
296 Haik, Aldo243763 27.87
297 Barle, Janez243662 28.44
298 Sydor, Andrzej243662 43.66
299 Cámpora, Daniel H243562 23.17
300 Joksic, Sinisa243363 39.89
301 Rubinetti, Jorge A243356 35.42
302 Klaric, Zlatko243266 23.85
303 Duer, Arne243261 21.14
304 Tompa, Janos243257 33.34
305 Sideif Sade, Fikret I243270 28.66
306 Sznapik, Aleksander243151 29.56
307 Arnason, Jon L243055 19.80
308 Wirthensohn, Heinz243063 29.32
309 Matera, Salvatore Joseph243064
310 Pribyl, Josef243052 32.89
311 Bednarski, Jacek B243060 41.47
312 Martinovic, Slobodan242958 35.10
313 Tischbierek, Raj242958 17.93
314 Meduna, Eduard242858 29.97
315 Birnboim, Nathan242865 29.76
316 Plaskett, Jim242863 20.45
317 Minev, Nikolay N242765 49.65
318 Jamieson, Robert Murray242766
319 Augustin, Josef242657 38.29
320 Brinck Claussen, Bjorn242659
321 Garcia Martinez, Silvino242555 36.16
322 Kuijpers, Franciscus Antonius242463
323 Burger, Karl242467 47.61
324 Groszpeter, Attila242455 20.23
325 Rodriguez, Ruben242361 33.73
326 Morris, Walter D242360 21.99
327 Harandi, Khosro242261 29.99
328 Kristiansen, Jens242254 28.27
329 Trapl, Jindrich242260 38.44
330 Rocha, Antonio242267 36.22
331 Bohosjan, Sarkis242268 39.43
332 Grinberg, Ricardo242175 32.63
333 Vera, Reynaldo242176 19.65
334 Pokojowczyk, Jerzy242154 31.53
335 Cvetkovic, Srdjan242161 34.51
336 Ostermeyer, Peter242071 36.89
337 Webb, Simon241962 31.22
338 Djuric, Stefan241964 25.10
339 Ilic, Zoran241867 17.08
340 Vilela, Jose Luis241855 27.45
341 Clemens, Christian241869 40.07
342 Sisniega, Marcel241865 21.09
343 Nogueiras, Jesus241765 21.12
344 Pavlov, Mircea241763 42.96
345 Bellin, Robert241653 28.17
346 Ciric, Dragoljub M241565 44.80
347 Hase, Juan Carlos241462
348 Franco Ocampos, Zenon241458 24.30
349 Bielczyk, Jacek241454 27.52
350 Renman, Nils Gustaf241363
351 Tomaszewski, Roman241257 20.29
352 Strauss, David J241272 34.07
353 Gruenberg, Hans Ulrich241265 24.64
354 Pritchett, Craig William241266
355 Fedder, Steen241259 29.21
356 deFirmian, Nicholas E241261 23.10
357 Dueckstein, Andreas241165 53.08
358 Dobosz, Henryk241154 27.45
359 Hartoch, Robert G241062
360 Enklaar, Bertus F241064
361 Mascarinas, Rico240965 27.50
362 Franklin, Michael J240765 49.58
363 Van der Sterren, Paul240752 24.46
364 Janoševic, Dragoljub240763 57.15
365 Toth, Bela240760 37.37
366 Watson, John L240769 28.98
367 Rohde, Michael A240672 21.01
368 Swic, Waldemar240565 27.47
369 Zapata, Alonso240558 22.03
370 Bellon Lopez, Juan Manuel240557 30.31
371 Fedorowicz, John P240455 21.92
372 Bergstrom, Christer240476 21.92
373 Balshan, Amikam240363
374 Biriescu, Ioan240370 26.85
375 Svensson, Bengt240276 20.15
376 Welin, Thomas240265 20.98
377 Hebert, Jean240157 22.80
378 Gruchacz, Robert240165 26.75
379 Bouaziz, Slim240158 30.37
380 Wittmann, Walter240063 32.47
381 Henley, Ron W240065 23.74
382 Law, Andrew P239971 30.14
383 Emma, Jaime J239859 42.62
384 Hoi, Carsten239755 23.62
385 Lanka, Zigurds239769 20.28
386 Skrobek, Ryszard239757 29.16
387 Cappello, Renato239667
388 Przewoznik, Jan239656 22.95
389 Peev, Peicho Chonev239671 40.41
390 Nicevski, Risto239660 35.18
391 Lombard, Andre239470 29.94
392 Short, Nigel D239455 15.25
393 Littlewood, Paul E239463 24.62
394 Grigorov, Jordan N239365 26.73
395 Bronstein, Luis239356 34.25
396 Gonsior, Evzen239359 48.73
397 Foygel, Igor239272
398 Lau, Ralf239266 20.87
399 Flear, Glenn C239267 21.55
400 Kagan, Shimon239254 38.40
401 Iskov, Gert239155 32.09
402 Taylor, Timothy239174 27.56
403 Moehring, Guenther239156 43.77
404 Cording, Harm239069 43.64
405 Jacobsen, Bo239075 31.72
406 Bojkovic, Slobodan238975 35.10
407 Lobron, Eric238966 20.32
408 Ost Hansen, Jacob238972
409 Sloth, Jorn238963 35.98
410 Despotovic, Momcilo238969 32.49
411 Garcia Palermo, Carlos238960 26.75
412 Rigo, Janos238857 31.84
413 Sibarevic, Milenko238868 35.47
414 Nikolic, Predrag238769 19.97
415 Kengis, Edvins238773 21.39
416 Lanc, Alois238675 32.54
417 Lieb, Harald238668 45.68
418 Banas, Jan238655 33.24
419 Visier Segovia, Fernando238673 37.58
420 Goodman, David SC238663
421 Borm, Franciscus WM238561
422 Brondum, Eric238465 38.71
423 Szymczak, Zbigniew238467 28.66
424 Neckar, Lubomir238465 30.08
425 Van Riemsdijk, Herman C238455 32.01
426 Kaiszauri, Konstanty238455 27.85
427 Paehtz, Thomas Sr238363 23.98
428 Watzka, Horst238365 41.96
429 Whiteley, Andrew J238268 33.23
430 Cuasnicu, Oscar238266 37.85
431 Hoelzl, Franz238256 34.40
432 Soos, Bela238175 50.48
433 Horvath, Tamas238064 28.86
434 Djukic, Zeljko238071 21.22
435 Cuartas, Carlos238059 40.04
436 Adamski, Andrzej238060 41.63
437 Rumens, David E237969 40.93
438 Schiffer, Karl Josef237870
439 Rajna, George237869 33.55
440 Benjamin, Joel L237761 16.47
441 Akesson, Ralf237765 19.56
442 Coudari, Camille237667 29.09
443 De Bruycker, Bernard237674 39.21
444 Pavlovic, Dejan237671
445 Odendahl, Steven M237662 20.85
446 Van der Vliet, Fredrik237560
447 Segal, Alexandru Sorin237458 32.91
448 Mišta, Ladislav237468 36.83
449 Andres Mendez, Miguel237370
450 Danner, Georg237360 33.85
451 Scheeren, Peter237358 25.09
452 Fries Nielsen, Jens Ove237355 20.52
453 Szilágyi, György237375 59.16
454 Rosenlund, Thorbjorn237175 29.20
455 Rossetto, Héctor D237165 57.97
456 Schinzel, Wladyslaw237152 37.28
457 Basman, Michael J237063 34.46
458 Angantysson, Haukur236961 31.75
459 Helmers, Knut J236864 23.57
460 Rantanen, Yrjo A236763 30.36
461 Cooper, John Grantley236768
462 Filguth, Rubens A236765 24.44
463 Jamroz, Zbigniew236771 46.22
464 Kastner, Jeffrey236573 30.63
465 Ristic, Nenad236471 21.78
466 Sapi, Laszlo236467 45.45
467 Nun, Jiri236262 23.09
468 Filipowicz, Andrzej236266 42.30
469 Petran, Pal236257 33.95
470 Root, Douglas236166 17.55
471 Olafsson, Helgi236159 24.04
472 Sikora Lerch, Jan236054
473 Trois, Francisco RT235955
474 Ionescu, Constantin235867 21.96
475 Kelecevic, Nedeljko235870 33.47
476 Gross, Stefan235759 31.01
477 Day, Lawrence A235771 31.58
478 Hess, Ralf235663 36.43
479 Orso, Miklos235659 24.23
480 Mortensen, Erling235557 25.40
481 Giardelli, Sergio C235560 25.18
482 Barreras, Alberto235475 29.40
483 Formanek, Edward W235365 38.32
484 Hodgson, Julian M235269 17.10
485 Rakic, Tomislav234961 45.80
486 Holm, Sejer234865 41.06
487 Frias, Victor J234866 24.56
488 Hvenekilde, Jorgen234866 45.01
489 Hansen, Curt234871 15.95
490 Braga, Fernando234861 22.14
491 Fuller, Maxwell L234757 35.59
492 Kovacs, Laszlo M234758 41.90
493 Kouatly, Bachar234671 22.49
494 Maciejewski, Andrzej234564 29.14
495 Niklasson, Christer234457 27.66
496 Tichy, Vladimir234470 33.91
497 Hesse, Peter234457 35.92
498 Witkowski, Stefan234364 48.92
499 Diaz, Joaquin C234273 32.15
500 Fernandez, Juan C234258 29.08

These ratings, calculated as of August 31, 1980, incorporate all games (against rated opponents) played in the time between September 1, 1979 and August 31, 1980, along with the ratings that were already calculated as of August 31, 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 August 31, 1980. This represents the player's estimated strength on September 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 September 1, 1980. The +/- value represents the standard deviation of that estimate; the player's true strength on September 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 September 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 August 31, 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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