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Top 10 active players as of June 30, 1983


Top 500 active players as of June 30, 1983

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K27995147.1% #320.21
2 Karpov, Anatoly E27864933.2% #432.10
3 Spassky, Boris V2706502.2% #2046.42
4 Korchnoi, Viktor L2703492.0% #2152.27
5 Andersson, Ulf2701481.5% #2232.01
6 Ljubojevic, Ljubomir2700511.9% #2332.66
7 Vaganian, Rafael A2692491.2% #2631.71
8 Beliavsky, Alexander G2692501.2% #2629.54
9 Tal, Mikhail2689491.0% #2746.64
10 Romanishin, Oleg M2688491.0% #2731.47
11 Portisch, Lajos2687490.9% #2846.24
12 Polugaevsky, Lev A2687501.1% #2848.61
13 Dolmatov, Sergey V2681510.9% #3224.36
14 Petrosian, Tigran V2678500.6% #3354.04
15 Timman, Jan H2676480.5% #3331.54
16 Ribli, Zoltán2669490.4% #3831.81
17 Smyslov, Vassily V2669520.5% #3962.27
18 Hübner, Robert2660490.2% #4434.65
19 Gulko, Boris F2658570.5% #4736.39
20 Psakhis, Lev B2652490.1% #4824.59
21 Hort, Vlastimil2649480.1% #5039.47
22 Balashov, Yury S2647500.1% #5234.30
23 Jussupow, Artur M2633490.1% #6423.38
24 Geller, Efim P263250 #6558.33
25 Sosonko, Gennadi2631500.1% #6640.12
26 Tukmakov, Vladimir B2630510.1% #6637.29
27 Dorfman, Iosif D2628520.1% #6931.16
28 Tseshkovsky, Vitaly V262450 #7138.76
29 Bronstein, David I2622580.1% #7859.36
30 Agzamov, Georgy T262052 #7628.81
31 Miles, Anthony J261849 #7628.19
32 Nunn, John D M261449 #8028.18
33 Seirawan, Yasser261450 #8023.27
34 Vaisser, Anatoli261455 #8334.32
35 Lputian, Smbat G261252 #8325.38
36 Ftácnik, Lubomír261248 #8125.67
37 Kupreichik, Viktor D260853 #8733.98
38 Smejkal, Jan260751 #8837.27
39 Makarichev, Sergey Y260656 #9229.62
40 Browne, Walter S260250 #9134.47
41 Razuvaev, Yury S260051 #9437.72
42 Sax, Gyula260050 #9432.03
43 Kavalek, Lubomir259952 #9639.89
44 Kuzmin, Gennady P259754 #9937.45
45 Palatnik, Semen A2597690.1% #11033.26
46 Kovacevic, Vladimir259752 #9841.26
47 Azmaiparashvili, Zurab A259656 #10123.29
48 Lerner, Konstantin Z259655 #10133.34
49 Dvoretsky, Mark I2596640.1% #10735.56
50 Malaniuk, Vladimir P259562 #10625.94
51 Gipslis, Aivars259556 #10346.39
52 Suba, Mihai259451 #10036.08
53 Taimanov, Mark E2594630.1% #10957.40
54 Ivanov, Igor V259355 #10436.48
55 Larsen, Bent259250 #10248.32
56 Averbakh, Yury L2590710.1% #11761.39
57 Mikhalchishin, Adrian B259054 #10528.62
58 Alburt, Lev O258954 #10837.86
59 Parma, Bruno258965 #11541.50
60 Panchenko, Alexander N258853 #10929.73
61 Adorján, András258850 #10733.25
62 Christiansen, Larry M258651 #10827.01
63 Yudasin, Leonid G258652 #10923.89
64 Gorelov, Sergey G258557 #11425.87
65 Nemet, Ivan2585710.1% #12340.21
66 Nikolic, Predrag258550 #11022.80
67 Kochiev, Alexander258562 #11727.26
68 Tarjan, James E258459 #11631.36
69 Chernin, Alexander M258262 #11923.31
70 Chekhov, Valery A258052 #11527.59
71 Rashkovsky, Nukhim N258054 #11637.20
72 Averkin, Orest N258065 #12439.35
73 Vorotnikov, Vladislav V257760 #12235.87
74 Kholmov, Ratmir D257762 #12458.13
75 Kremenetsky, Anatoly M257666 #12844.46
76 Torre, Eugenio257650 #11831.65
77 Dvoiris, Semen I257664 #12724.66
78 Vasiukov, Evgeny A257553 #12050.32
79 Sveshnikov, Evgeny E257551 #12033.38
80 Didishko, Vereslav257363 #12934.22
81 Panno, Oscar R257357 #12748.29
82 Gheorghiu, Florin257350 #12139.23
83 Savon, Vladimir A257258 #12742.76
84 Ehlvest, Jaan257062 #13120.71
85 Anikaev, Yury256756 #13135.00
86 Speelman, Jonathan S256550 #12826.74
87 Murey, Yakov256551 #13041.91
88 Gligoric, Svetozar256351 #13160.41
89 Kurajica, Bojan256250 #13235.62
90 Vitolinš, Alvis256259 #13837.04
91 Veingold, Aleksander256061 #14029.72
92 Quinteros, Miguel A256051 #13335.51
93 Yurtaev, Leonid256063 #14224.16
94 Gufeld, Eduard E255955 #13947.28
95 Byrne, Robert E255860 #14255.19
96 Uhlmann, Wolfgang255849 #13548.25
97 Timoshchenko, Gennady255760 #14334.17
98 Gavrikov, Victor N255758 #14225.91
99 Zaichik, Gennady L255658 #14326.38
100 Vyzmanavin, Alexey255369 #15223.49
101 Gurgenidze, Bukhuti I255359 49.63
102 van der Wiel, John T H255249 23.89
103 Georgadze, Tamaz V255057 35.64
104 Lombardy, William J254975 45.57
105 Sturua, Zurab254966 24.06
106 Petrosian, Arshak B254953 29.54
107 Kharitonov, Andrey Y254861 24.24
108 Simic, Radoslav254658 35.06
109 Ivanovic, Božidar254451 36.85
110 Stean, Michael F254454 29.82
111 Knaak, Rainer F254350 30.29
112 Chandler, Murray G254349 23.24
113 Dzindzichashvili, Roman Y254259 39.15
114 Ivkov, Borislav254252 49.63
115 Grigorian, Karen A254165 35.81
116 Pintér, József254151 29.64
117 Vogt, Lothar H253749 31.45
118 Mestel, A Jonathan253650 26.30
119 Bagirov, Vladimir K253652 46.87
120 Marjanovic, Slavoljub253652 28.48
121 Hulak, Krunoslav253551 32.10
122 Karlsson, Lars253550 27.96
123 Nikolac, Juraj253569 51.19
124 Reshevsky, Samuel H253462 71.59
125 Vladimirov, Evgeny Y253464 26.44
126 Csom, István253350 43.08
127 Velimirovic, Dragoljub253252 41.13
128 Barua, Dibyendu253261 16.67
129 Shamkovich, Leonid A253153 60.08
130 Abramovic, Boško253051 32.38
131 Kengis, Edvins253057 24.22
132 Pfleger, Helmut253055 39.90
133 Thipsay, Praveen Mahadeo252961 23.88
134 Osnos, Viacheslav V252763 47.93
135 Eolian, Levon S252671 23.79
136 Ubilava, Elizbar E252559 32.84
137 Řgaard, Leif252357 31.48
138 deFirmian, Nicholas E252353 25.92
139 García Gonzáles, Guillermo252351 29.56
140 Olafsson, Fridrik252258 48.43
141 Najdorf, Miguel252256 73.21
142 Suetin, Alexey S252055 56.62
143 Magerramov, Elmar S252073 25.22
144 Sokolov, Andrey Y251966 20.28
145 Popovic, Petar251952 24.38
146 Shneider, Aleksandr251958 21.11
147 Unzicker, Wolfgang251955 58.01
148 Andrianov, Nikolai251861 21.53
149 Lechtynsky, Jiri251853 35.60
150 Liberzon, Vladimir M251857 46.27
151 Djuric, Stefan251760 27.92
152 Faragó, Iván251749 37.24
153 Lein, Anatoly251652 52.26
154 Matulovic, Milan251655 48.05
155 Lobron, Eric251550 23.15
156 Ree, Hans251550 38.79
157 Karner, Hillar251561 47.92
158 Pachmann, Ludek251366 59.13
159 Marovic, Dražen251369 45.46
160 Mokrý, Karel251255 24.40
161 Salov, Valery B251268 19.09
162 Cebalo, Mišo251054 38.40
163 Zilberman, Nathan R251064 43.16
164 Lukin, Andrei M251060 34.84
165 Kudrin, Sergey250955 23.81
166 Vukic, Milan250956 39.86
167 Keene, Raymond250952
168 Biyiasas, Peter250969 32.61
169 Tseitlin, Mikhail S250855 36.04
170 Ivanov, Alexander V250869 27.16
171 Kogan, Boris250766
172 McKay, Roderick M250771 31.38
173 Franco Ocampos, Zenon250755 27.13
174 Bukic, Enver250658 45.58
175 Nikolic, Zivoslav250656 29.55
176 Szabó, László250668 66.28
177 Yermolinsky, Alex V250556 25.22
178 Lutikov, Anatoly S250570 50.40
179 Wedberg, Tom250552 29.59
180 Meduna, Eduard250550 32.80
181 Jamieson, Robert Murray250466
182 Klovans, Janis250260 48.22
183 Lukacs, Peter250052 32.97
184 Espig, Lutz250051 34.48
185 Bilek, István249970 50.88
186 Cámpora, Daniel H249757 25.99
187 Matanovic, Aleksandar249763 53.10
188 Mnatsakanian, Eduard A249667 44.56
189 Spassov, Liuben249550 40.27
190 Schmidt, Wlodzimierz249549 40.22
191 Radulov, Ivan249449 44.48
192 Groszpeter, Attila249352 23.06
193 Tringov, Georgy P249353 46.31
194 Henley, Ron W249254 26.57
195 Oll, Lembit249262 17.19
196 Stoica, Valentin249159 33.37
197 Knezevic, Milorad249152 46.66
198 Malich, Burkhard G249157 46.59
199 Georgiev, Krum249051 25.10
200 Plachetka, Jan249050 38.37
201 Peters, John A248963 32.39
202 Chiburdanidze, Maia G248855 22.45
203 Bastian, Herbert248862 30.55
204 Díez del Corral, Jesús248860 50.23
205 Rogulj, Branko248869 31.91
206 Birnboim, Nathan248757 32.59
207 Gurevich, Dmitry248651 26.80
208 Bjelajac, Milan248562 35.29
209 Jansa, Vlastimil248549 40.59
210 Enklaar, Bertus F248575
211 Velikov, Petar248549 32.25
212 Pigusov, Evgeny248464 22.25
213 Schussler, Harry248351 26.02
214 Kraidman, Yair248364 50.66
215 Podzielny, Karl Heinz248266 28.80
216 Smagin, Sergey248269 24.81
217 Kalinitschew, Sergey248274 27.41
218 Gruenberg, Hans Ulrich248158 27.47
219 Strauss, David J248166 36.90
220 Bisguier, Arthur B248164 53.73
221 Nogueiras, Jesus248153 23.95
222 Szekely, Peter248153 28.39
223 Hazai, Laszlo248055 30.04
224 Benko, Pal C247960 54.95
225 Bönsch, Uwe247950 24.71
226 Tatai, Stefano247855 45.27
227 Todorcevic, Miodrag247862 42.64
228 Popov, Luben247755 47.42
229 Mochalov, Evgeny V247769 31.67
230 Portisch, Ferenc247758 44.22
231 Inkiov, Ventzislav247750 27.11
232 Rodriguez, Amador247752 26.81
233 Pribyl, Josef247752 35.72
234 Antoshin, Vladimir S247764 54.13
235 Schneider, Lars Ake247654
236 Hug, Werner247664 30.80
237 Vera, Reynaldo247553 22.48
238 Van der Sterren, Paul247452 27.29
239 Van Wijgerden, Cornelis247456 33.10
240 Ostermeyer, Peter247463 39.72
241 Dely, Peter247470 48.98
242 Barczay, Laszlo247355 47.36
243 Rajkovic, Dusan247355 41.04
244 Sygulski, Artur247254 22.93
245 Mednis, Edmar J247269 46.27
246 Pytel, Krzysztof247255 38.12
247 Nei, Iivo247161 51.66
248 Sigurjónsson, Gudmundur247054 35.76
249 Klaric, Zlatko247060 26.68
250 Zaltsman, Vitaly F247065 41.68
251 Short, Nigel D246950 18.08
252 Mortensen, Erling246951 28.23
253 Sunye Neto, Jaime246854 26.16
254 Mariotti, Sergio246857 36.89
255 Seret, Jean Luc246767
256 Helmers, Knut J246653 26.40
257 Martinovic, Slobodan246654 37.92
258 Hansen, Curt246653 18.78
259 Ligterink, Gert246653 33.62
260 Ost Hansen, Jacob246656
261 Gutman, Lev246557 37.76
262 Kindermann, Stefan246552 23.51
263 Spiridonov, Nikola246551 45.34
264 Pekarek, Ales246463 21.54
265 Ciocaltea, Victor246454 51.45
266 Djukic, Zeljko246365 24.05
267 Bouaziz, Slim246357 33.20
268 Hebden, Mark246353 25.37
269 Arnason, Jon L246252 22.63
270 Adamski, Jan246251 39.63
271 Jelen, Iztok246275 36.45
272 Duer, Arne246268 23.96
273 Kirov Ivanov, Nino246252 37.81
274 Bischoff, Klaus246155 22.06
275 Zaitsev, Igor A246156 45.09
276 Martz, William E246175
277 Hecht, Hans-Joachim246062 44.42
278 Ermenkov, Evgenij246051 33.75
279 Robatsch, Karl246057 54.71
280 Taulbut, Shaun M246060 25.47
281 Donchev, Dimitar I245956 24.94
282 Rukavina, Josip245960 40.59
283 Agdestein, Simen245960 16.12
284 Prandstetter, Eduard245852 34.54
285 Padevsky, Nikola B245664 50.09
286 Hartston, William R245661 35.88
287 Ardiansyah, Haji245659 31.57
288 Langeweg, Kick245554 46.31
289 Govedarica, Radovan245563 35.38
290 Vokác, Marek245462 24.56
291 Greenfeld, Alon245361 19.20
292 Ghinda, Mihail Viorel245357 33.92
293 Sahovic, Dragutin245259 42.89
294 Rodriguez, Ruben245257 36.56
295 Toth, Bela245156 40.20
296 Dobrovolsky, Ladislav245054 32.52
297 Wirthensohn, Heinz245057 32.15
298 Wolf, Volker245069 25.81
299 Minic, Dragoljub244973 46.32
300 Sharif, Mershad244874 30.96
301 Gruenfeld, Yehuda244854 27.34
302 Vadasz, Laszlo244864 35.42
303 Lanka, Zigurds244862 23.11
304 Rivas Pastor, Manuel244752 22.96
305 McCambridge, Vincent244664 23.31
306 Zapata, Alonso244653 24.86
307 Sznapik, Aleksander244650 32.39
308 Szmetan, Jorge244560 33.09
309 Hamann, Svend244571 42.73
310 Ornstein, Axel244453 31.18
311 Luczak, Andrzej244463 34.57
312 Castro Rojas, Oscar Humberto244473 30.14
313 Pétursson, Margeir244356 23.37
314 Forintos, Gyözö V244359 47.91
315 Mascarinas, Rico244362 30.33
316 Ambroz, Jan244252 29.03
317 Neckar, Lubomir244259 32.91
318 Feustel, Bernd244259 28.78
319 Fernandez Garcia, Jose Luis244157 29.16
320 Wockenfuss, Klaus244162 31.84
321 Filipovic, Branko244163 25.73
322 Barlov, Dragan244153 26.42
323 Commons, Kim S244064 31.93
324 Velickovic, Sasa244067 32.24
325 Hermann, Manfred243867 40.83
326 Gurevich, Mikhail N243868 24.36
327 Donner, Johannes H243859 55.98
328 Rubinetti, Jorge A243858 38.25
329 Doda, Zbigniew243772 52.36
330 Schweber, Samuel243761 46.95
331 Cvetkovic, Srdjan243758 37.34
332 Alexandria, Nana243665 33.71
333 Fedorowicz, John P243657 24.76
334 Tisdall, Jonathan D243655 24.84
335 Makropoulos, Georgios243662 29.76
336 Renman, Nils Gustaf243570
337 Wittmann, Walter243457 35.30
338 Tiller, Bjorn243462 24.45
339 Ghitescu, Theodor243461 49.43
340 Sydor, Andrzej243458 46.49
341 Soppe, Guillermo243372 22.79
342 Szymczak, Zbigniew243354 31.49
343 Raicevic, Vladimir243360 34.16
344 Garcia Palermo, Carlos243354 29.58
345 Lukov, Valentin243255 27.55
346 Tavadian, Ragik243173
347 Rodriguez Vargas, Orestes243163 39.98
348 Hennings, Artur243169 42.96
349 Morris, Walter D243170 24.83
350 Frias, Victor J243055 27.39
351 Lalev, Dimitar243057 23.45
352 Imanaliev, Taalaibek243065
353 Gruen, Peter243061 26.46
354 Augustin, Josef243073 41.12
355 Scheeren, Peter243055 27.91
356 Jakobsen, Ole242955 40.70
357 Stohl, Igor242962 18.76
358 Nun, Jiri242858 25.92
359 Bellin, Robert242859 30.99
360 Reefschlaeger, Helmut242758 39.23
361 Gomez Baillo, Jorge H242772 24.20
362 Shvidler, Eliahu242764 23.53
363 Lengyel, Levente242759 50.05
364 Zichichi, Alvise242765 44.98
365 Rantanen, Yrjo A242753 33.19
366 Hase, Juan Carlos242760
367 Hebert, Jean242661 25.63
368 Bronstein, Luis242565 37.08
369 Littlewood, Paul E242556 27.45
370 Palacios, Antonio242563 30.63
371 Ravikumar, Vaidyanathan242562 23.51
372 Ciric, Dragoljub M242473 47.63
373 Krnic, Zdenko242459 35.74
374 Kristiansen, Jens242454 31.10
375 Kaiszauri, Konstanty242363 30.68
376 Bajovic, Milan242359
377 Ostojic, Predrag242374 45.36
378 Tompa, Janos242274 36.17
379 Dizdar, Goran242255 24.57
380 Lau, Ralf242264 23.70
381 Kelecevic, Nedeljko242157 36.30
382 Kunsztowicz, Uwe242169 39.45
383 Bielczyk, Jacek242152 30.35
384 Horvath, Tamas241957 31.69
385 Kagan, Shimon241958 41.23
386 Flear, Glenn C241966 24.38
387 Hernandez, Roman241853 33.60
388 Trapl, Jindrich241864 41.27
389 Plaskett, Jim241856 23.28
390 Osmanovic, Kemal241863 42.31
391 Schneider, Attila241757 28.21
392 Borm, Franciscus WM241763
393 Bohm, Hans241753 33.46
394 Hausner, Ivan241655 31.21
395 Cramling, Dan241657 24.40
396 Kuligowski, Adam241553 27.52
397 Cabrilo, Goran241559 24.99
398 Olafsson, Helgi241457 26.87
399 Braga, Fernando241460 24.97
400 Levitina, Irina S241465 29.06
401 Brinck Claussen, Bjorn241254
402 Banas, Jan241257 36.07
403 Pritchett, Craig William241165
404 Goehring, Karl Heinz241164
405 Garcia Martinez, Silvino241154 38.98
406 Morovic Fernández, Iván E241164 20.27
407 Kestler, Hans-Günter241061 43.55
408 Haik, Aldo240960 30.70
409 Williams, Arthur Howard240974
410 Drasko, Milan240863 20.56
411 Handoko, Edhi240858 22.84
412 Sideif Sade, Fikret I240768 31.49
413 Westerinen, Heikki MJ240751 39.17
414 Kuijpers, Franciscus Antonius240674
415 Balshan, Amikam240575
416 Van Voorthuijsen, PW.240576
417 Kuijf, Hans240471 21.13
418 Angantysson, Haukur240473 34.58
419 Burger, Karl240455 50.44
420 Petran, Pal240467 36.79
421 Nun, Josef240464 49.93
422 Danner, Georg240256 36.68
423 Foisor, Ovidiu240256 24.23
424 Trikaliotis, Georgios240272 44.35
425 Fedder, Steen240261 32.04
426 Gerusel, Mathias240174 45.40
427 Herzog, Adolf240162 30.06
428 Vilela, Jose Luis240152 30.28
429 van Scheltinga, Tjeerd D240168 69.31
430 Tomaszewski, Roman240164 23.12
431 Damjanovic, Mato239858 56.27
432 Nowak, Ignacy239862 34.47
433 Thorsteins, Karl239763 18.71
434 Hansson, Dan239675 31.05
435 Cifuentes Parada, Roberto239576 25.52
436 Kouatly, Bachar239558 25.32
437 Diaz, Joaquin C239559 34.98
438 Martin Gonzalez, Angel239562 30.49
439 Myagmarsuren, Lhamsuren239568 45.37
440 Honfi, Karoly239462 52.68
441 Benjamin, Joel L239360 19.30
442 Pinal, Nelson Borges239360
443 Gonsior, Evzen239268 51.56
444 Welin, Thomas239267 23.82
445 Van Baarle, C John239269 38.20
446 Nurkic, Sahbaz239274 27.29
447 Ernst, Thomas239265 22.87
448 Casper, Thomas239256 24.29
449 Borik, Otto239256 35.76
450 Filipowicz, Andrzej239160 45.13
451 Pliester, Leon239166 28.86
452 Gauglitz, Gernot239063 21.01
453 Sibarevic, Milenko239065 38.30
454 Filipenko, Alexander V238974 34.32
455 Gross, Stefan238960 33.84
456 Budde, Vladimir238966 30.52
457 Bellon Lopez, Juan Manuel238954 33.14
458 Velez, Nestor238964 27.15
459 Ochoa de Echaguen, F Javier238863 28.82
460 Santos, Jose P238867 24.72
461 Karkanaque, Ilir238873
462 Kuijf, Marinus238863 23.38
463 McNab, Colin Anderson238562 22.41
464 Moehring, Guenther238561 46.60
465 Soos, Bela238568 53.31
466 Stempin, Pawel238458 23.96
467 Huss, Andreas238469 32.71
468 Dobosz, Henryk238366 30.28
469 Skembris, Spyridon238354 25.36
470 Monier, Raul238274 23.15
471 Nicevski, Risto238260 38.01
472 Odendahl, Steven M238273 23.68
473 Rakic, Tomislav238260 48.63
474 Peev, Peicho Chonev238267 43.24
475 Gobet, Fernand238262 21.38
476 Tempone, Marcelo238260 20.81
477 Novikov, Igor A238176 21.10
478 Akesson, Ralf238159 22.39
479 Hartoch, Robert G238065
480 Herbrechtsmeier, Christof238064 29.51
481 Zueger, Beat237961 22.07
482 Cooper, John Grantley237969
483 Van Riemsdijk, Herman C237964 34.84
484 Sarwinski, Miroslaw237862 29.46
485 Barle, Janez237871 31.27
486 Murray, J.237871
487 Kuzmin, Alexey237870 20.31
488 Bass, Leonid237772 26.08
489 Segal, Alexandru Sorin237670 35.74
490 Schinzel, Wladyslaw237661 40.11
491 Skalkotas, Nikolaos237669 33.77
492 Hartmann, Wolfram237668 27.10
493 Pokojowczyk, Jerzy237653 34.36
494 Liang Jinrong237563 23.11
495 Danailov, Silvio237571 22.19
496 Bednarski, Jacek B237465 44.30
497 Sisniega, Marcel237455 23.92
498 Balinas, Rosendo Carrean237464
499 Davies, Nigel R237366 22.91
500 Partos, Charles237363 46.89

These ratings, calculated as of June 30, 1983, incorporate all games (against rated opponents) played in the time between July 1, 1982 and June 30, 1983, along with the ratings that were already calculated as of June 30, 1982. 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, 1983. This represents the player's estimated strength on July 1, 1983.

+/- 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, 1983. The +/- value represents the standard deviation of that estimate; the player's true strength on July 1, 1983 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, 1983. 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, 1983. 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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