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Top 10 active players as of September 30, 1983


Top 500 active players as of September 30, 1983

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28165159.6% #220.46
2 Karpov, Anatoly E27824925.9% #432.35
3 Korchnoi, Viktor L2704501.8% #2252.52
4 Spassky, Boris V2699491.3% #2446.67
5 Andersson, Ulf2697481.1% #2432.26
6 Vaganian, Rafael A2696491.1% #2531.95
7 Polugaevsky, Lev A2691511.0% #2848.86
8 Portisch, Lajos2691491.0% #2746.49
9 Beliavsky, Alexander G2687490.8% #2929.79
10 Romanishin, Oleg M2686490.7% #3031.72
11 Ljubojevic, Ljubomir2685500.7% #3132.91
12 Tal, Mikhail2683480.5% #3246.89
13 Timman, Jan H2676480.4% #3531.79
14 Dolmatov, Sergey V2672510.4% #3824.61
15 Hübner, Robert2669500.4% #4034.90
16 Petrosian, Tigran V2667500.3% #4254.29
17 Ribli, Zoltán2665490.3% #4232.06
18 Smyslov, Vassily V2664530.4% #4562.52
19 Gulko, Boris F2660550.3% #5036.64
20 Psakhis, Lev B2655490.1% #5024.84
21 Hort, Vlastimil2650480.1% #5339.72
22 Eingorn, Viacheslav S2644630.4% #6526.85
23 Balashov, Yury S2638500.1% #6434.55
24 Jussupow, Artur M263650 #6623.63
25 Nunn, John D M263449 #6628.43
26 Miles, Anthony J263348 #6728.44
27 Dorfman, Iosif D2631520.1% #7131.41
28 Dvoiris, Semen I2631580.1% #7524.91
29 Larsen, Bent262850 #7248.57
30 Agzamov, Georgy T262752 #7529.06
31 Browne, Walter S262650 #7434.72
32 Kupreichik, Viktor D262552 #7734.24
33 Lputian, Smbat G262551 #7625.63
34 Geller, Efim P262350 #7658.58
35 Chernin, Alexander M2622570.1% #8323.56
36 Ftácnik, Lubomír261948 #8025.91
37 Bronstein, David I2618550.1% #8559.61
38 Ehlvest, Jaan2616580.1% #8920.95
39 Tseshkovsky, Vitaly V261549 #8539.01
40 Seirawan, Yasser261549 #8423.52
41 Sosonko, Gennadi261450 #8640.37
42 Tukmakov, Vladimir B261351 #8837.54
43 Vaisser, Anatoli261052 #9134.57
44 Sveshnikov, Evgeny E260950 #9133.63
45 Yurtaev, Leonid260658 #9924.41
46 Christiansen, Larry M260151 #9927.26
47 Kholmov, Ratmir D260158 #10558.38
48 Nikolic, Predrag260150 #9923.05
49 Kochiev, Alexander260057 #10427.51
50 Taimanov, Mark E2600630.1% #10957.65
51 Gipslis, Aivars259957 #10646.64
52 Makarichev, Sergey Y259754 #10629.87
53 Kovacevic, Vladimir259752 #10541.51
54 Chekhov, Valery A259651 #10427.84
55 Azmaiparashvili, Zurab A259654 #10723.54
56 Dvoretsky, Mark I2596640.1% #11335.81
57 Razuvaev, Yury S259651 #10537.96
58 Kuzmin, Gennady P259653 #10637.70
59 Malaniuk, Vladimir P259562 #11326.19
60 Vyzmanavin, Alexey259560 #11223.74
61 Sax, Gyula259549 #10532.28
62 Averbakh, Yury L2593720.1% #12361.64
63 Smejkal, Jan259350 #10837.52
64 Kavalek, Lubomir259151 #11140.14
65 Adorján, András259149 #10933.50
66 Gorelov, Sergey G258957 #11526.12
67 Rashkovsky, Nukhim N258954 #11437.45
68 Yudasin, Leonid G258752 #11524.14
69 Gavrikov, Victor N258753 #11526.17
70 Parma, Bruno258664 #12441.75
71 Vasiukov, Evgeny A258553 #11750.57
72 Lerner, Konstantin Z258453 #11833.59
73 Timoshchenko, Gennady258257 #12234.42
74 Kremenetsky, Anatoly M258266 #13044.71
75 Georgadze, Tamaz V258155 #12235.89
76 Didishko, Vereslav258059 #12634.47
77 Torre, Eugenio258051 #12131.90
78 Averkin, Orest N257965 #13139.60
79 Vorotnikov, Vladislav V257960 #12936.12
80 Byrne, Robert E257957 #12755.44
81 Palatnik, Semen A257660 #13233.51
82 Panno, Oscar R257657 #12948.54
83 Novikov, Igor A257663 #13321.35
84 Savon, Vladimir A257658 #13043.01
85 Panchenko, Alexander N257552 #12729.98
86 Ivanov, Igor V257454 #13036.73
87 Gheorghiu, Florin257250 #12839.48
88 Mikhalchishin, Adrian B256953 #13328.87
89 Quinteros, Miguel A256750 #13335.76
90 Alburt, Lev O256652 #13638.11
91 Chandler, Murray G256649 #13423.49
92 Vitolinš, Alvis256661 #14137.29
93 Veingold, Aleksander256461 #14329.96
94 Kurajica, Bojan256451 #13735.87
95 Kharitonov, Andrey Y256357 #14224.49
96 Zaichik, Gennady L256053 #14226.63
97 Ivanovic, Božidar256050 #14137.10
98 Uhlmann, Wolfgang256049 #14048.50
99 Barua, Dibyendu255960 #14816.92
100 van der Wiel, John T H255649 #14324.14
101 Sokolov, Andrey Y255658 20.53
102 Simic, Radoslav255661 35.31
103 Tarjan, James E255554 31.61
104 Stean, Michael F255555 30.07
105 Gufeld, Eduard E255454 47.53
106 Speelman, Jonathan S255149 26.99
107 Ionov, Sergey255068 21.73
108 Petrosian, Arshak B255054 29.79
109 Polovodin, Igor A255064 28.52
110 Suba, Mihai255050 36.33
111 Knaak, Rainer F254949 30.54
112 Anikaev, Yury254954 35.25
113 Ubilava, Elizbar E254854 33.09
114 Bagirov, Vladimir K254851 47.12
115 Lombardy, William J254875 45.82
116 Marjanovic, Slavoljub254852 28.73
117 Mestel, A Jonathan254751 26.55
118 Dzindzichashvili, Roman Y254755 39.40
119 deFirmian, Nicholas E254652 26.18
120 Ivkov, Borislav254652 49.88
121 Oll, Lembit254657 17.44
122 Nikolac, Juraj254670 51.44
123 Glek, Igor V254664 21.90
124 Lobron, Eric254249 23.40
125 Csom, István254250 43.33
126 Karlsson, Lars254150 28.22
127 Gligoric, Svetozar254050 60.66
128 Hulak, Krunoslav253952 32.35
129 Vogt, Lothar H253850 31.70
130 Velimirovic, Dragoljub253752 41.38
131 Sturua, Zurab253559 24.31
132 Abramovic, Boško253451 32.63
133 Nemet, Ivan253261 40.46
134 Pfleger, Helmut253053 40.15
135 Shamkovich, Leonid A253053 60.33
136 Faragó, Iván253049 37.49
137 Pintér, József252952 29.89
138 Reshevsky, Samuel H252865 71.84
139 Eolian, Levon S252871 24.04
140 Pigusov, Evgeny252758 22.50
141 Olafsson, Fridrik252758 48.68
142 Osnos, Viacheslav V252669 48.18
143 Gurgenidze, Bukhuti I252556 49.88
144 Cebalo, Mišo252553 38.65
145 Najdorf, Miguel252456 73.46
146 Grigorian, Karen A252359 36.06
147 Murey, Yakov252351 42.16
148 Pachmann, Ludek252366 59.38
149 Shneider, Aleksandr252158 21.36
150 Magerramov, Elmar S252073 25.47
151 Liberzon, Vladimir M252058 46.52
152 Matulovic, Milan251955 48.30
153 Kengis, Edvins251959 24.47
154 Meduna, Eduard251949 33.05
155 Vladimirov, Evgeny Y251958 26.69
156 Bilek, István251970 51.13
157 Lechtynsky, Jiri251851 35.85
158 Spassov, Liuben251850 40.52
159 Jamieson, Robert Murray251866
160 García Gonzáles, Guillermo251851 29.81
161 Wedberg, Tom251752 29.84
162 Popovic, Petar251653 24.63
163 Zakharov, Alexander V251669 39.97
164 Ostermeyer, Peter251658 39.96
165 Keene, Raymond251653
166 Zilberman, Nathan R251463 43.41
167 Djuric, Stefan251456 28.18
168 Korzubov, Peter251462 21.74
169 Salov, Valery B251468 19.34
170 Suetin, Alexey S251455 56.87
171 Marovic, Dražen251369 45.71
172 Biyiasas, Peter251369 32.86
173 Petrushin, Alexander I251364 36.55
174 McKay, Roderick M251372 31.63
175 Mnatsakanian, Eduard A251360 44.81
176 Lukin, Andrei M251260 35.09
177 Vukic, Milan251255 40.11
178 Thipsay, Praveen Mahadeo251161 24.13
179 Nikolic, Zivoslav251156 29.80
180 Unzicker, Wolfgang251055 58.26
181 Klovans, Janis251057 48.47
182 Tseitlin, Mikhail S250955 36.29
183 Ree, Hans250950 39.04
184 Bukic, Enver250857 45.83
185 Yermolinsky, Alex V250856 25.47
186 Donchev, Dimitar I250752 25.19
187 Andrianov, Nikolai250761 21.78
188 Lutikov, Anatoly S250770 50.65
189 Ivanov, Alexander V250772 27.41
190 Szabó, László250769 66.53
191 Kudrin, Sergey250753 24.06
192 Espig, Lutz250551 34.73
193 Gurevich, Dmitry250551 27.05
194 Lukacs, Peter250551 33.22
195 Lein, Anatoly250451 52.51
196 Spraggett, Kevin B250161 28.89
197 Hansen, Curt250052 19.03
198 Matanovic, Aleksandar250063 53.35
199 Schmidt, Wlodzimierz250050 40.47
200 Nogueiras, Jesus249953 24.20
201 Groszpeter, Attila249952 23.31
202 Chiburdanidze, Maia G249856 22.70
203 Franco Ocampos, Zenon249854 27.38
204 Henley, Ron W249851 26.82
205 Agdestein, Simen249755 16.37
206 Inkiov, Ventzislav249650 27.36
207 Tringov, Georgy P249655 46.56
208 Georgiev, Krum249651 25.35
209 Jansa, Vlastimil249549 40.84
210 Gruenberg, Hans Ulrich249455 27.72
211 Řgaard, Leif249357 31.73
212 Velikov, Petar249349 32.50
213 Malich, Burkhard G249258 46.84
214 Knezevic, Milorad249152 46.91
215 Rogulj, Branko249069 32.16
216 Radulov, Ivan248950 44.73
217 Bikhovsky, Avigdor I248963 28.57
218 Pribyl, Josef248951 35.96
219 Kraidman, Yair248965 50.91
220 Hazai, Laszlo248954 30.29
221 Birnboim, Nathan248859 32.84
222 Díez del Corral, Jesús248860 50.48
223 Todorcevic, Miodrag248769 42.89
224 Van der Sterren, Paul248751 27.54
225 Soltis, Andrew E248663 36.34
226 Smagin, Sergey248669 25.06
227 Mochalov, Evgeny V248569 31.91
228 Rozentalis, Eduardas248465 20.34
229 Kalinitschew, Sergey248474 27.66
230 Sunye Neto, Jaime248353 26.41
231 Bönsch, Uwe248350 24.95
232 Plachetka, Jan248349 38.62
233 Schussler, Harry248251 26.27
234 Peters, John A248265 32.64
235 Antoshin, Vladimir S248165 54.38
236 Schneider, Lars Ake248054
237 Tatai, Stefano248055 45.52
238 Mokrý, Karel247954 24.65
239 Podzielny, Karl Heinz247968 29.05
240 Rodriguez, Amador247953 27.06
241 Dely, Peter247870 49.23
242 Spiridonov, Nikola247852 45.59
243 Gobet, Fernand247859 21.63
244 Cámpora, Daniel H247756 26.25
245 Benko, Pal C247760 55.21
246 Pytel, Krzysztof247756 38.37
247 Ghinda, Mihail Viorel247754 34.18
248 Sigurjónsson, Gudmundur247753 36.01
249 Mariotti, Sergio247659 37.14
250 Guseinov, Aidyn247468 31.74
251 Adamski, Jan247451 39.88
252 Kindermann, Stefan247451 23.76
253 Kirov Ivanov, Nino247452 38.06
254 Martinovic, Slobodan247354 38.18
255 Mednis, Edmar J247369 46.52
256 Short, Nigel D247250 18.33
257 Zaitsev, Igor A247254 45.34
258 Arbakov, Valentin247263 31.67
259 Klaric, Zlatko247261 26.93
260 Szekely, Peter247253 28.64
261 Popov, Luben247255 47.67
262 Vera, Reynaldo247151 22.73
263 Tavadian, Ragik247161
264 Hug, Werner247166 31.05
265 Djukic, Zeljko247065 24.30
266 Portisch, Ferenc247054 44.47
267 Ernst, Thomas247062 23.12
268 Seret, Jean Luc246867
269 Plaskett, Jim246856 23.53
270 Van Wijgerden, Cornelis246855 33.35
271 Sahovic, Dragutin246859 43.14
272 Hecht, Hans-Joachim246761 44.67
273 Kogan, Boris246660
274 Jelen, Iztok246675 36.70
275 Stohl, Igor246661 19.01
276 Barczay, Laszlo246654 47.61
277 Ciocaltea, Victor246654 51.70
278 Duer, Arne246669 24.22
279 Arnason, Jon L246452 22.88
280 Mortensen, Erling246451 28.48
281 Gruenfeld, Yehuda246355 27.59
282 Martz, William E246375
283 Pekarek, Ales246363 21.79
284 Ost Hansen, Jacob246259
285 Karner, Hillar246257 48.17
286 Dizdar, Goran246256 24.82
287 Eslon, Jaan246266 31.57
288 Stoica, Valentin246156 33.62
289 Rivas Pastor, Manuel245952 23.21
290 Gutman, Lev245957 38.01
291 Raicevic, Vladimir245965 34.41
292 Padevsky, Nikola B245966 50.34
293 Zilberstein, Valery I245966 40.46
294 Vokác, Marek245966 24.81
295 Renman, Nils Gustaf245969
296 Pétursson, Margeir245956 23.62
297 Ambroz, Jan245853 29.28
298 Rukavina, Josip245860 40.84
299 Taulbut, Shaun M245861 25.72
300 Bisguier, Arthur B245862 53.97
301 Prandstetter, Eduard245751 34.79
302 Lanka, Zigurds245662 23.36
303 Bajovic, Milan245665
304 Zapata, Alonso245552 25.11
305 Hartston, William R245564 36.13
306 Bastian, Herbert245558 30.80
307 Botterill, George Steven245472
308 Ligterink, Gert245452 33.87
309 Wolf, Volker245369 26.06
310 Helmers, Knut J245353 26.65
311 Rajkovic, Dusan245353 41.29
312 Hebert, Jean245361 25.88
313 Velickovic, Sasa245261 32.49
314 Szmetan, Jorge245261 33.34
315 Dobrovolsky, Ladislav245255 32.77
316 Robatsch, Karl245257 54.95
317 Minic, Dragoljub245173 46.57
318 Toth, Bela245055 40.45
319 McCambridge, Vincent245066 23.56
320 Schweber, Samuel244962 47.20
321 Govedarica, Radovan244975 35.63
322 Bischoff, Klaus244955 22.31
323 Fedorowicz, John P244958 25.01
324 Hebden, Mark244852 25.62
325 Commons, Kim S244772 32.19
326 Sznapik, Aleksander244750 32.64
327 Feustel, Bernd244759 29.03
328 Bass, Leonid244759 26.33
329 Giorgadze, Giorgi244664 18.96
330 Rodriguez, Ruben244660 36.81
331 Strauss, David J244574 37.15
332 Hamann, Svend244571 42.97
333 Vadasz, Laszlo244565 35.67
334 Wockenfuss, Klaus244463 32.09
335 Nei, Iivo244459 51.91
336 Fernandez Garcia, Jose Luis244457 29.41
337 Neckar, Lubomir244459 33.16
338 Scheeren, Peter244355 28.17
339 Hermann, Manfred244367 41.08
340 Langeweg, Kick244353 46.56
341 Barlov, Dragan244254 26.67
342 Mascarinas, Rico244262 30.58
343 Kaidanov, Gregory S244265 23.96
344 Semkov, Semko244257 23.59
345 Greenfeld, Alon244161 19.45
346 Gurevich, Mikhail N244068 24.61
347 Lukov, Valentin243952 27.80
348 Szymczak, Zbigniew243953 31.74
349 Sharif, Mershad243875 31.22
350 Donner, Johannes H243862 56.23
351 Gomez Baillo, Jorge H243771 24.45
352 Garcia Palermo, Carlos243754 29.83
353 Luczak, Andrzej243765 34.82
354 Littlewood, Paul E243757 27.70
355 Bouaziz, Slim243756 33.45
356 Soppe, Guillermo243672 23.04
357 Nun, Jiri243660 26.17
358 Cvetkovic, Srdjan243561 37.59
359 Krnic, Zdenko243559 35.99
360 Kestler, Hans-Günter243563 43.80
361 Gruen, Peter243461 26.71
362 Kristiansen, Jens243454 31.35
363 Forintos, Gyözö V243457 48.17
364 Rubinetti, Jorge A243362 38.50
365 Bjelajac, Milan243357 35.54
366 Augustin, Josef243374 41.37
367 Tompa, Janos243367 36.42
368 Alexandria, Nana243370 33.96
369 Rodriguez Vargas, Orestes243363 40.24
370 Makropoulos, Georgios243263 30.01
371 Reefschlaeger, Helmut243258 39.48
372 Hennings, Artur243269 43.22
373 Kunsztowicz, Uwe243270 39.70
374 Wittmann, Walter243157 35.55
375 Ghitescu, Theodor243161 49.68
376 Lengyel, Levente243062 50.30
377 Jakobsen, Ole243054 40.94
378 Doda, Zbigniew243062 52.61
379 Ardiansyah, Haji243056 31.82
380 Zichichi, Alvise243067 45.24
381 Wirthensohn, Heinz243056 32.40
382 Rantanen, Yrjo A243054 33.44
383 Shvidler, Eliahu242864 23.78
384 Ostojic, Predrag242875 45.61
385 Zaltsman, Vitaly F242859 41.92
386 Hase, Juan Carlos242760
387 Kaiszauri, Konstanty242765 30.92
388 Foisor, Ovidiu242755 24.48
389 Frias, Victor J242755 27.64
390 Bronstein, Luis242765 37.33
391 Wiedenkeller, Michael242666 20.72
392 Palacios, Antonio242663 30.88
393 Schneider, Attila242657 28.46
394 Danailov, Silvio242561 22.44
395 Lau, Ralf242565 23.94
396 Lalev, Dimitar242457 23.70
397 Hernandez, Roman242452 33.85
398 Levitina, Irina S242465 29.31
399 Tiller, Bjorn242456 24.70
400 Ravikumar, Vaidyanathan242462 23.76
401 Bellin, Robert242463 31.25
402 Shirazi, Kamran G242363 30.86
403 Ornstein, Axel242355 31.43
404 Imanaliev, Taalaibek242364
405 Kuligowski, Adam242353 27.77
406 Horvath, Tamas242355 31.93
407 Sydor, Andrzej242258 46.74
408 Maki, Veijo242262 24.81
409 Braga, Fernando242161 25.22
410 Filipovic, Branko242164 25.98
411 Kagan, Shimon242058 41.48
412 Zahariev, Zahari242067 22.05
413 Banas, Jan242057 36.32
414 Olafsson, Helgi241959 27.12
415 Benjamin, Joel L241957 19.55
416 Trapl, Jindrich241970 41.52
417 Garcia Martinez, Silvino241952 39.24
418 Ermenkov, Evgenij241851 34.00
419 Cabrilo, Goran241859 25.24
420 Hausner, Ivan241856 31.46
421 Kelecevic, Nedeljko241757 36.55
422 Bielczyk, Jacek241652 30.60
423 Goehring, Karl Heinz241663
424 Peev, Peicho Chonev241568 43.49
425 Tisdall, Jonathan D241554 25.09
426 Bohm, Hans241554 33.71
427 Loginov, Valery A241564 27.80
428 Qi Jingxuan241564 35.89
429 Van Voorthuijsen, PW.241576
430 Akesson, Ralf241561 22.64
431 Trifunov, Dimitar241464 19.73
432 Handoko, Edhi241358 23.09
433 Osmanovic, Kemal241263 42.56
434 Kuijf, Marinus241261 23.63
435 Borm, Franciscus WM241059
436 Haik, Aldo241060 30.94
437 Sideif Sade, Fikret I241071 31.74
438 Petran, Pal241067 37.04
439 Fedder, Steen241060 32.29
440 Kuijpers, Franciscus Antonius240974
441 Hodgson, Julian M240860 20.18
442 Tomaszewski, Roman240766 23.37
443 Damjanovic, Mato240758 56.52
444 Brinck Claussen, Bjorn240654
445 Martin Gonzalez, Angel240662 30.74
446 Sygulski, Artur240553 23.19
447 Angantysson, Haukur240572 34.83
448 Gerusel, Mathias240574 45.65
449 Drasko, Milan240463 20.81
450 Danner, Georg240456 36.92
451 Herzog, Adolf240362 30.31
452 Flear, Glenn C240364 24.63
453 Pritchett, Craig William240269
454 Borik, Otto240257 36.01
455 Trikaliotis, Georgios240272 44.60
456 Vilela, Jose Luis240152 30.53
457 Pliester, Leon240169 29.11
458 Budde, Vladimir240166 30.77
459 van Scheltinga, Tjeerd D240068 69.56
460 Cramling, Dan240059 24.65
461 Nun, Josef240065 50.19
462 Diaz, Joaquin C239958 35.23
463 Gonsior, Evzen239967 51.81
464 Williams, Arthur Howard239875
465 Sisniega, Marcel239854 24.17
466 Westerinen, Heikki MJ239851 39.42
467 Heinbuch, Detlef239870 22.72
468 Dlugy, Maxim239759 17.67
469 Bukal, Vladimir Sr239776 43.91
470 Nurkic, Sahbaz239673 27.54
471 Casper, Thomas239656 24.54
472 Davies, Nigel R239563 23.16
473 Filipowicz, Andrzej239563 45.38
474 Myagmarsuren, Lhamsuren239468 45.62
475 Welin, Thomas239468 24.07
476 Karkanaque, Ilir239373
477 Hartoch, Robert G239370
478 Grigorov, Jordan N239361 29.81
479 Gauglitz, Gernot239363 21.26
480 Sjoberg, Mats239274 24.88
481 Velez, Nestor239163 27.40
482 Georgiev, Kiril239157 17.84
483 Rakic, Tomislav239060 48.88
484 Gross, Stefan239060 34.09
485 Pinal, Nelson Borges238960
486 Santos, Jose P238967 24.96
487 Yrjola, Jouni238864 23.93
488 Skembris, Spyridon238854 25.61
489 Bellon Lopez, Juan Manuel238754 33.39
490 Moehring, Guenther238761 46.85
491 Sibarevic, Milenko238765 38.55
492 Whitehead, Jay E238761 21.96
493 Murray, J.238769
494 Ochoa de Echaguen, F Javier238662 29.07
495 Nowak, Ignacy238658 34.72
496 Fries Nielsen, Jens Ove238651 23.60
497 Herbrechtsmeier, Christof238564 29.76
498 Tempone, Marcelo238560 21.06
499 Cooper, John Grantley238571
500 Filipenko, Alexander V238574 34.57

These ratings, calculated as of September 30, 1983, incorporate all games (against rated opponents) played in the time between October 1, 1982 and September 30, 1983, along with the ratings that were already calculated as of September 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 September 30, 1983. This represents the player's estimated strength on October 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 October 1, 1983. The +/- value represents the standard deviation of that estimate; the player's true strength on October 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 October 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 September 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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