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Top 10 active players as of May 31, 1983


Top 500 active players as of May 31, 1983

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28025149.4% #320.13
2 Karpov, Anatoly E27864932.4% #432.02
3 Spassky, Boris V2702491.8% #2246.34
4 Korchnoi, Viktor L2701491.7% #2252.19
5 Andersson, Ulf2701481.5% #2231.92
6 Tal, Mikhail2697491.3% #2346.56
7 Ljubojevic, Ljubomir2696511.6% #2532.58
8 Polugaevsky, Lev A2689511.2% #2748.53
9 Beliavsky, Alexander G2689501.0% #2729.46
10 Portisch, Lajos2683490.7% #3046.16
11 Vaganian, Rafael A2683490.7% #3031.63
12 Dolmatov, Sergey V2679510.7% #3324.28
13 Timman, Jan H2677480.5% #3331.46
14 Petrosian, Tigran V2674500.5% #3553.95
15 Smyslov, Vassily V2672520.6% #3762.19
16 Romanishin, Oleg M2671490.4% #3731.39
17 Ribli, Zoltán2669490.3% #3731.73
18 Gulko, Boris F2669560.7% #4136.31
19 Chernin, Alexander M2650610.5% #5623.23
20 Hübner, Robert2648490.1% #5134.57
21 Hort, Vlastimil2648480.1% #5139.39
22 Psakhis, Lev B2647490.1% #5224.51
23 Balashov, Yury S2642500.1% #5634.22
24 Tukmakov, Vladimir B2642510.2% #5737.21
25 Geller, Efim P263150 #6558.25
26 Sosonko, Gennadi262950 #6740.04
27 Dorfman, Iosif D2629520.1% #6931.08
28 Bronstein, David I2628570.1% #7259.28
29 Jussupow, Artur M262750 #6923.30
30 Agzamov, Georgy T262152 #7528.73
31 Tseshkovsky, Vitaly V262150 #7438.68
32 Malaniuk, Vladimir P2618620.1% #8425.86
33 Sax, Gyula261450 #7931.95
34 Seirawan, Yasser261350 #8123.19
35 Vaisser, Anatoli261255 #8534.24
36 Nunn, John D M261149 #8328.10
37 Miles, Anthony J261049 #8328.11
38 Ivanov, Igor V260956 #8836.40
39 Ftácnik, Lubomír260948 #8425.59
40 Mikhalchishin, Adrian B260855 #8928.54
41 Lputian, Smbat G260751 #8725.30
42 Makarichev, Sergey Y260756 #9129.54
43 Kupreichik, Viktor D260653 #8933.91
44 Kholmov, Ratmir D2605740.4% #10358.05
45 Kuzmin, Gennady P260353 #9337.37
46 Kavalek, Lubomir260351 #9139.81
47 Browne, Walter S260250 #9234.39
48 Razuvaev, Yury S260151 #9437.64
49 Lerner, Konstantin Z259856 #9933.26
50 Gipslis, Aivars259659 #10246.31
51 Smejkal, Jan259450 #9937.19
52 Dvoretsky, Mark I2594650.1% #11035.48
53 Averbakh, Yury L2593690.1% #11261.31
54 Azmaiparashvili, Zurab A259356 #10523.21
55 Alburt, Lev O259356 #10437.78
56 Suba, Mihai259350 #10035.99
57 Gorelov, Sergey G259056 #10725.79
58 Parma, Bruno259064 #11341.42
59 Panchenko, Alexander N258854 #10829.65
60 Larsen, Bent258849 #10548.24
61 Palatnik, Semen A2588690.1% #11833.18
62 Taimanov, Mark E258759 #11257.32
63 Christiansen, Larry M258651 #10826.92
64 Kovacevic, Vladimir258553 #11041.18
65 Nemet, Ivan2583710.1% #12540.13
66 Tarjan, James E258359 #11631.28
67 Dzindzichashvili, Roman Y258264 #12139.07
68 Adorján, András258050 #11433.17
69 Kochiev, Alexander257761 #12327.18
70 Sveshnikov, Evgeny E257752 #11733.30
71 Vasiukov, Evgeny A257652 #11950.24
72 Torre, Eugenio257550 #11831.57
73 Vyzmanavin, Alexey257565 #12923.41
74 Vitolinš, Alvis257562 #12736.95
75 Murey, Yakov257452 #12041.83
76 Panno, Oscar R257457 #12548.21
77 Kremenetsky, Anatoly M257363 #12944.38
78 Didishko, Vereslav257363 #12934.14
79 Yudasin, Leonid G257252 #12223.81
80 Dvoiris, Semen I257264 #13024.58
81 Nikolic, Predrag257251 #12322.72
82 Savon, Vladimir A257257 #12642.68
83 Rashkovsky, Nukhim N257153 #12437.12
84 Ehlvest, Jaan257162 #13020.63
85 Gheorghiu, Florin257150 #12339.15
86 Gavrikov, Victor N257057 #12725.84
87 Speelman, Jonathan S256950 #12426.66
88 Averkin, Orest N256865 #13539.27
89 Kurajica, Bojan256550 #12835.54
90 Anikaev, Yury256256 #13434.92
91 Vorotnikov, Vladislav V255968 #14535.79
92 Chekhov, Valery A255953 #13627.51
93 Yurtaev, Leonid255963 #14324.08
94 Veingold, Aleksander255961 #14129.64
95 Gufeld, Eduard E255855 #13847.20
96 Zaichik, Gennady L255658 #14126.30
97 Timoshchenko, Gennady255560 #14434.09
98 Georgadze, Tamaz V255557 #14235.56
99 Byrne, Robert E255559 #14355.11
100 Uhlmann, Wolfgang255449 #13748.17
101 Gligoric, Svetozar255152 60.33
102 Gurgenidze, Bukhuti I255159 49.55
103 Simic, Radoslav255057 34.97
104 Hulak, Krunoslav254752 32.02
105 Sokolov, Andrey Y254763 20.20
106 Pintér, József254751 29.56
107 van der Wiel, John T H254649 23.81
108 Petrosian, Arshak B254554 29.46
109 Magerramov, Elmar S254573 25.14
110 Quinteros, Miguel A254451 35.43
111 Sturua, Zurab254466 23.97
112 Shamkovich, Leonid A254353 59.99
113 Kharitonov, Andrey Y254160 24.16
114 Knaak, Rainer F254150 30.21
115 Bagirov, Vladimir K254052 46.79
116 Csom, István253750 42.99
117 Stean, Michael F253753 29.74
118 Lombardy, William J253674 45.49
119 Vogt, Lothar H253649 31.37
120 Ivkov, Borislav253552 49.55
121 Karlsson, Lars253350 27.89
122 Chandler, Murray G253349 23.16
123 Abramovic, Boško253351 32.30
124 Shneider, Aleksandr253258 21.03
125 Salov, Valery B253167 19.01
126 Velimirovic, Dragoljub253152 41.05
127 Ivanovic, Božidar253151 36.77
128 Reshevsky, Samuel H253062 71.51
129 Thipsay, Praveen Mahadeo252961 23.80
130 Grigorian, Karen A252763 35.73
131 Zilberman, Nathan R252565 43.08
132 Faragó, Iván252449 37.16
133 Vladimirov, Evgeny Y252364 26.36
134 Cebalo, Mišo252354 38.32
135 Řgaard, Leif252357 31.40
136 Eolian, Levon S252271 23.71
137 Ree, Hans252250 38.71
138 Osnos, Viacheslav V252263 47.85
139 Lobron, Eric252150 23.07
140 Vukic, Milan252157 39.78
141 deFirmian, Nicholas E252153 25.85
142 Olafsson, Fridrik252158 48.35
143 Unzicker, Wolfgang252154 57.92
144 Popovic, Petar252152 24.30
145 Pfleger, Helmut252055 39.82
146 Kengis, Edvins252061 24.14
147 Matulovic, Milan252054 47.97
148 Ubilava, Elizbar E251959 32.76
149 Najdorf, Miguel251956 73.13
150 Suetin, Alexey S251954 56.54
151 García Gonzáles, Guillermo251851 29.48
152 Liberzon, Vladimir M251857 46.19
153 Keene, Raymond251853
154 Mestel, A Jonathan251650 26.22
155 Barua, Dibyendu251661 16.59
156 Nikolic, Zivoslav251455 29.47
157 McKay, Roderick M251471 31.30
158 Karner, Hillar251461 47.84
159 Marjanovic, Slavoljub251353 28.40
160 Lein, Anatoly251352 52.18
161 Lechtynsky, Jiri251253 35.52
162 Marovic, Dražen251269 45.38
163 Andrianov, Nikolai251159 21.45
164 Yermolinsky, Alex V251156 25.14
165 Mokrý, Karel250955 24.32
166 Pachmann, Ludek250966 59.05
167 Lukin, Andrei M250660 34.76
168 Franco Ocampos, Zenon250555 27.05
169 Lutikov, Anatoly S250570 50.32
170 Bukic, Enver250557 45.50
171 Knezevic, Milorad250452 46.58
172 Kogan, Boris250466
173 Tseitlin, Mikhail S250454 35.95
174 Malich, Burkhard G250457 46.51
175 Klovans, Janis250466 48.14
176 Szabó, László250468 66.20
177 Biyiasas, Peter250367 32.53
178 Wedberg, Tom250351 29.51
179 Meduna, Eduard250250 32.72
180 Mnatsakanian, Eduard A250265 44.48
181 Chiburdanidze, Maia G250256 22.37
182 Radulov, Ivan250149 44.40
183 Ivanov, Alexander V250069 27.08
184 Tringov, Georgy P249954 46.23
185 Oll, Lembit249962 17.11
186 Jamieson, Robert Murray249866
187 Espig, Lutz249850 34.40
188 Matanovic, Aleksandar249763 53.02
189 Bilek, István249770 50.80
190 Rajkovic, Dusan249654 40.95
191 Djuric, Stefan249660 27.85
192 Cámpora, Daniel H249557 25.92
193 Lukacs, Peter249452 32.89
194 Schmidt, Wlodzimierz249249 40.14
195 Georgiev, Krum249051 25.02
196 Stoica, Valentin248959 33.29
197 Groszpeter, Attila248752 22.97
198 Plachetka, Jan248650 38.29
199 Pribyl, Josef248652 35.64
200 Díez del Corral, Jesús248560 50.15
201 Birnboim, Nathan248557 32.51
202 Bjelajac, Milan248562 35.21
203 Peters, John A248462 32.31
204 Benko, Pal C248459 54.88
205 Smagin, Sergey248369 24.73
206 Todorcevic, Miodrag248262 42.56
207 Inkiov, Ventzislav248250 27.03
208 Rogulj, Branko248269 31.83
209 Szekely, Peter248253 28.31
210 Kudrin, Sergey248258 23.73
211 Kalinitschew, Sergey248174 27.33
212 Kraidman, Yair248164 50.58
213 Strauss, David J248166 36.82
214 Jansa, Vlastimil248049 40.51
215 Pigusov, Evgeny248064 22.17
216 Henley, Ron W248056 26.49
217 Schussler, Harry247951 25.93
218 Velikov, Petar247950 32.17
219 Schneider, Lars Ake247954
220 Zaltsman, Vitaly F247864 41.60
221 Pytel, Krzysztof247857 38.04
222 Spassov, Liuben247850 40.19
223 Tatai, Stefano247854 45.19
224 Gruenberg, Hans Ulrich247658 27.39
225 Van der Sterren, Paul247652 27.21
226 Bönsch, Uwe247550 24.63
227 Buturin, Vladimir247573 39.53
228 Antoshin, Vladimir S247562 54.05
229 Vera, Reynaldo247353 22.40
230 Ostermeyer, Peter247363 39.64
231 Hazai, Laszlo247354 29.96
232 Hug, Werner247364 30.72
233 Popov, Luben247254 47.34
234 Klaric, Zlatko247260 26.60
235 Mednis, Edmar J247268 46.19
236 Portisch, Ferenc247156 44.14
237 Barczay, Laszlo247055 47.28
238 Podzielny, Karl Heinz246966 28.72
239 Rodriguez, Amador246952 26.73
240 Nei, Iivo246961 51.58
241 Sigurjónsson, Gudmundur246954 35.68
242 Adamski, Jan246851 39.55
243 Dely, Peter246870 48.90
244 Seret, Jean Luc246767
245 Sunye Neto, Jaime246753 26.08
246 Sygulski, Artur246754 22.86
247 Helmers, Knut J246753 26.32
248 Mariotti, Sergio246757 36.81
249 Hartston, William R246662 35.80
250 Nogueiras, Jesus246653 23.87
251 Mochalov, Evgeny V246669 31.59
252 Jelen, Iztok246573 36.37
253 Sahovic, Dragutin246559 42.81
254 Gutman, Lev246457 37.68
255 Hansen, Curt246454 18.70
256 Kindermann, Stefan246352 23.43
257 Pekarek, Ales246363 21.46
258 Mortensen, Erling246251 28.15
259 Hebden, Mark246254 25.29
260 Ermenkov, Evgenij246151 33.67
261 Martz, William E246175
262 Zaitsev, Igor A246156 45.01
263 Bouaziz, Slim246157 33.12
264 Taulbut, Shaun M246058 25.39
265 Langeweg, Kick245954 46.23
266 Van Wijgerden, Cornelis245957 33.02
267 Bastian, Herbert245965 30.47
268 Enklaar, Bertus F245872
269 Bischoff, Klaus245857 21.97
270 Robatsch, Karl245757 54.63
271 Hecht, Hans-Joachim245762 44.34
272 Ciocaltea, Victor245753 51.37
273 Ardiansyah, Haji245759 31.49
274 Short, Nigel D245751 17.99
275 Agdestein, Simen245660 16.04
276 Padevsky, Nikola B245664 50.01
277 Gurevich, Dmitry245652 26.72
278 Arnason, Jon L245552 22.55
279 Kirov Ivanov, Nino245552 37.73
280 Spiridonov, Nikola245552 45.26
281 Forintos, Gyözö V245558 47.84
282 Duer, Arne245566 23.89
283 Prandstetter, Eduard245451 34.46
284 Ghinda, Mihail Viorel245356 33.85
285 Hermann, Manfred245367 40.75
286 Rodriguez, Ruben245357 36.48
287 Vokác, Marek245162 24.48
288 Govedarica, Radovan245163 35.30
289 Greenfeld, Alon244961 19.12
290 Bradford, Joseph M244976 32.58
291 Toth, Bela244956 40.12
292 Rukavina, Josip244964 40.51
293 Gurevich, Mikhail N244867 24.28
294 Vadasz, Laszlo244863 35.34
295 Donchev, Dimitar I244758 24.86
296 Dobrovolsky, Ladislav244754 32.44
297 Wirthensohn, Heinz244757 32.07
298 Hamann, Svend244672 42.65
299 Gruenfeld, Yehuda244654 27.26
300 Ligterink, Gert244653 33.54
301 McCambridge, Vincent244564 23.23
302 Minic, Dragoljub244573 46.24
303 Wolf, Volker244569 25.73
304 Lau, Ralf244471 23.62
305 Szmetan, Jorge244460 33.01
306 Hebert, Jean244361 25.55
307 Rivas Pastor, Manuel244352 22.88
308 Sharif, Mershad244373 30.89
309 Ornstein, Axel244253 31.10
310 Sznapik, Aleksander244250 32.31
311 Wittmann, Walter244158 35.22
312 Filipovic, Branko244063 25.65
313 Wockenfuss, Klaus244062 31.76
314 Commons, Kim S243964 31.86
315 Jakobsen, Ole243955 40.62
316 Tisdall, Jonathan D243955 24.76
317 Luczak, Andrzej243963 34.49
318 Pétursson, Margeir243957 23.29
319 Castro Rojas, Oscar Humberto243972 30.06
320 Ambroz, Jan243752 28.95
321 Martinovic, Slobodan243753 37.85
322 Neckar, Lubomir243759 32.83
323 Velickovic, Sasa243767 32.16
324 Renman, Nils Gustaf243670
325 Rubinetti, Jorge A243658 38.17
326 Zapata, Alonso243653 24.78
327 Doda, Zbigniew243672 52.28
328 Lukov, Valentin243555 27.47
329 Bellin, Robert243559 30.92
330 Schweber, Samuel243561 46.87
331 Cvetkovic, Srdjan243558 37.26
332 Reefschlaeger, Helmut243560 39.15
333 Tiller, Bjorn243362 24.37
334 Donner, Johannes H243359 55.90
335 Ghitescu, Theodor243361 49.35
336 Soppe, Guillermo243272 22.71
337 Rodriguez Vargas, Orestes243263 39.91
338 Mascarinas, Rico243260 30.25
339 Raicevic, Vladimir243260 34.08
340 Despotovic, Momcilo243270 35.24
341 Littlewood, Paul E243156 27.37
342 Sydor, Andrzej243158 46.41
343 Stohl, Igor243162 18.68
344 Morris, Walter D243170 24.75
345 Tavadian, Ragik243073
346 Garcia Palermo, Carlos242954 29.50
347 Djukic, Zeljko242970 23.96
348 Feustel, Bernd242859 28.70
349 Palacios, Antonio242863 30.55
350 Szymczak, Zbigniew242854 31.41
351 Lalev, Dimitar242758 23.37
352 Zichichi, Alvise242765 44.91
353 Hennings, Artur242669 42.89
354 Flear, Glenn C242666 24.30
355 Lanka, Zigurds242671 23.03
356 Rantanen, Yrjo A242653 33.11
357 Gomez Baillo, Jorge H242672 24.12
358 Hase, Juan Carlos242560
359 Nun, Jiri242558 25.84
360 Barlov, Dragan242552 26.34
361 Shvidler, Eliahu242564 23.45
362 Lengyel, Levente242459 49.96
363 Augustin, Josef242473 41.04
364 Makropoulos, Georgios242460 29.68
365 Ciric, Dragoljub M242472 47.55
366 Fedorowicz, John P242360 24.68
367 Bronstein, Luis242365 36.99
368 Ostojic, Predrag242374 45.28
369 Bajovic, Milan242359
370 Drasko, Milan242263 20.48
371 Krnic, Zdenko242158 35.66
372 Imanaliev, Taalaibek242165
373 Alexandria, Nana242062 33.63
374 Cabrilo, Goran242059 24.91
375 Fedder, Steen241961 31.96
376 Ost Hansen, Jacob241858
377 Gulbrandsen, Arne Vinje241873
378 Kagan, Shimon241758 41.15
379 Bielczyk, Jacek241752 30.27
380 Plaskett, Jim241656 23.20
381 Kristiansen, Jens241656 31.02
382 Tompa, Janos241674 36.09
383 Kaiszauri, Konstanty241662 30.60
384 Scheeren, Peter241556 27.84
385 Borm, Franciscus WM241562
386 Kunsztowicz, Uwe241569 39.37
387 Trapl, Jindrich241564 41.19
388 Flesch, Janos241571 49.67
389 Kelecevic, Nedeljko241556 36.22
390 Arbakov, Valentin241372 31.34
391 Pritchett, Craig William241365
392 Westerinen, Heikki MJ241351 39.09
393 Morovic Fernández, Iván E241264 20.19
394 Olafsson, Helgi241257 26.79
395 Haik, Aldo241257 30.62
396 Hausner, Ivan241255 31.13
397 Cramling, Dan241256 24.32
398 Levitina, Irina S241165 28.97
399 Frias, Victor J241157 27.31
400 Novikov, Igor A241173 21.02
401 Kuligowski, Adam241153 27.44
402 Goehring, Karl Heinz241064
403 Bohm, Hans241054 33.38
404 Banas, Jan240957 35.99
405 Braga, Fernando240960 24.89
406 Hernandez, Roman240853 33.52
407 Brinck Claussen, Bjorn240855
408 Williams, Arthur Howard240774
409 Odendahl, Steven M240573 23.60
410 Schneider, Attila240557 28.13
411 Horvath, Tamas240557 31.61
412 Van Voorthuijsen, PW.240576
413 Balshan, Amikam240475
414 Petran, Pal240463 36.71
415 Kestler, Hans-Günter240461 43.47
416 Kuijpers, Franciscus Antonius240374
417 Sideif Sade, Fikret I240368 31.41
418 Kuijf, Hans240371 21.05
419 Nun, Josef240264 49.86
420 Ravikumar, Vaidyanathan240261 23.43
421 Trikaliotis, Georgios240172 44.27
422 Garcia Martinez, Silvino240053 38.91
423 Fernandez Garcia, Jose Luis240061 29.08
424 Herzog, Adolf240062 29.98
425 Angantysson, Haukur240073 34.50
426 van Scheltinga, Tjeerd D239968 69.23
427 Foisor, Ovidiu239956 24.15
428 Tomaszewski, Roman239764 23.04
429 Danner, Georg239655 36.60
430 Handoko, Edhi239658 22.76
431 Damjanovic, Mato239558 56.19
432 Burger, Karl239555 50.36
433 Cifuentes Parada, Roberto239576 25.44
434 Hansson, Dan239575 30.97
435 Zivanovic, Ivan239474 20.17
436 Honfi, Karoly239362 52.60
437 Martin Gonzalez, Angel239362 30.41
438 Peev, Peicho Chonev239269 43.16
439 Nowak, Ignacy239162 34.39
440 Vilela, Jose Luis239151 30.20
441 Benjamin, Joel L239160 19.22
442 Danailov, Silvio239171 22.11
443 Sisniega, Marcel239155 23.84
444 Gross, Stefan239161 33.76
445 Ernst, Thomas239162 22.79
446 Diaz, Joaquin C239158 34.90
447 Filipenko, Alexander V239174 34.24
448 Rakic, Tomislav239161 48.55
449 Welin, Thomas239164 23.74
450 Myagmarsuren, Lhamsuren239067 45.29
451 Gerusel, Mathias239073 45.32
452 McNab, Colin Anderson238962 22.33
453 Sibarevic, Milenko238965 38.22
454 Nurkic, Sahbaz238874 27.21
455 Filipowicz, Andrzej238860 45.05
456 Van Baarle, C John238869 38.12
457 Santos, Jose P238867 24.64
458 Dizdar, Goran238858 24.49
459 Casper, Thomas238756 24.21
460 Pliester, Leon238762 28.78
461 Borik, Otto238756 35.68
462 Heinbuch, Detlef238564 22.39
463 Karkanaque, Ilir238573
464 Bellon Lopez, Juan Manuel238553 33.06
465 Gauglitz, Gernot238563 20.92
466 Velez, Nestor238463 27.07
467 Barle, Janez238469 31.19
468 Akesson, Ralf238458 22.31
469 Kuijf, Marinus238363 23.30
470 Nicevski, Risto238360 37.92
471 Monier, Raul238274 23.07
472 Gonsior, Evzen238268 51.48
473 Soos, Bela238168 53.23
474 Van Riemsdijk, Herman C238164 34.76
475 Tempone, Marcelo238160 20.73
476 Stempin, Pawel238058 23.88
477 Kuzmin, Alexey238070 20.23
478 Moehring, Guenther238061 46.52
479 Huss, Andreas238069 32.63
480 Grigorov, Jordan N237970 29.48
481 Fries Nielsen, Jens Ove237951 23.27
482 Sarwinski, Miroslaw237961 29.38
483 Murray, J.237971
484 Davies, Nigel R237964 22.83
485 Gobet, Fernand237962 21.30
486 Segal, Alexandru Sorin237869 35.66
487 Herbrechtsmeier, Christof237764 29.43
488 Balinas, Rosendo Carrean237764
489 Hartoch, Robert G237765
490 Bass, Leonid237672 26.00
491 Ochoa de Echaguen, F Javier237663 28.74
492 Pinal, Nelson Borges237660
493 Pedersen, Erik237658 24.72
494 Hartmann, Wolfram237668 27.02
495 Thorsteins, Karl237561 18.63
496 Skembris, Spyridon237554 25.28
497 Zueger, Beat237561 21.99
498 Kouatly, Bachar237558 25.24
499 Berg, Klaus237554 23.08
500 Skalkotas, Nikolaos237469 33.69

These ratings, calculated as of May 31, 1983, incorporate all games (against rated opponents) played in the time between June 1, 1982 and May 31, 1983, along with the ratings that were already calculated as of May 31, 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 May 31, 1983. This represents the player's estimated strength on June 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 June 1, 1983. The +/- value represents the standard deviation of that estimate; the player's true strength on June 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 June 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 May 31, 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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