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Top 10 active players as of May 31, 1990


Top 500 active players as of May 31, 1990

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28504875.8% #127.13
2 Karpov, Anatoly E27954818.7% #339.02
3 Ivanchuk, Vassily2713491.0% #1921.20
4 Timman, Jan H2713480.8% #2038.46
5 Gelfand, Boris2710490.8% #2121.93
6 Salov, Valery B2707500.8% #2226.01
7 Korchnoi, Viktor L2687470.2% #3259.19
8 Khalifman, Alexander2681490.2% #3724.37
9 Gurevich, Mikhail N2680480.2% #3831.28
10 Yudasin, Leonid G2676500.2% #4230.81
11 Beliavsky, Alexander G2674480.1% #4236.46
12 Ehlvest, Jaan2673480.1% #4327.63
13 Short, Nigel D2667470.1% #4724.99
14 Lputian, Smbat G2663490.1% #5232.30
15 Andersson, Ulf2663480.1% #5238.92
16 Speelman, Jonathan S266348 #5233.66
17 Seirawan, Yasser265948 #5430.19
18 Dolmatov, Sergey V2657480.1% #5731.28
19 Nunn, John D M265648 #5735.10
20 Bareev, Evgeny265449 #6023.53
21 Tiviakov, Sergei2652560.1% #6617.30
22 Dautov, Rustem265251 #6324.51
23 Polugaevsky, Lev A265249 #6255.53
24 Vaganian, Rafael A265148 #6138.63
25 Jussupow, Artur M265048 #6330.30
26 Ribli, Zoltán264748 #6738.73
27 Chernin, Alexander M264748 #6730.23
28 Portisch, Lajos264648 #6753.16
29 Yurtaev, Leonid263852 #7831.08
30 Nikolic, Predrag263748 #7729.72
31 Agdestein, Simen263651 #7923.04
32 Gavrikov, Victor N263350 #8132.84
33 Tal, Mikhail263348 #8153.56
34 Dreev, Alexey263249 #8221.36
35 Hübner, Robert263049 #8441.57
36 Sokolov, Andrey Y262948 #8527.20
37 Aseev, Konstantin N262651 #9029.61
38 Ljubojevic, Ljubomir262648 #8839.58
39 Razuvaev, Yury S262550 #9244.64
40 Sax, Gyula262248 #9338.95
41 Gulko, Boris F262148 #9343.31
42 Miles, Anthony J262048 #9535.11
43 Balashov, Yury S262048 #9641.22
44 Vyzmanavin, Alexey261751 #10130.41
45 Azmaiparashvili, Zurab A261649 #10030.21
46 Christiansen, Larry M261650 #10033.92
47 Epishin, Vladimir261650 #10124.89
48 Dzindzichashvili, Roman Y261552 #10446.07
49 Dorfman, Iosif D261451 #10438.08
50 Kamsky, Gata261352 #10715.99
51 Eingorn, Viacheslav S261349 #10433.52
52 Sveshnikov, Evgeny E261352 #10740.30
53 Dvoiris, Semen I261350 #10631.58
54 Vladimirov, Evgeny Y261151 #10833.36
55 Anand, Viswanathan260950 #10920.47
56 Georgiev, Kiril260949 #10924.51
57 Oll, Lembit260950 #10924.11
58 Kramnik, Vladimir260861 #11914.93
59 Shirov, Alexei260750 #11117.91
60 Smirin, Ilia260650 #11322.36
61 Psakhis, Lev B260648 #11231.51
62 Novikov, Igor A260550 #11428.02
63 Smyslov, Vassily V260150 #11869.19
64 Rozentalis, Eduardas260151 #11827.01
65 Kruppa, Yuri260055 #12425.94
66 Timoshchenko, Gennady259851 #12241.09
67 deFirmian, Nicholas E259849 #12132.85
68 Tukmakov, Vladimir B259548 #12444.21
69 Lerner, Konstantin Z259450 #12740.26
70 Kovalev, Andrei259457 #13228.57
71 Dokhoian, Yury259350 #12825.60
72 Panchenko, Alexandar G2593710.1% #14229.15
73 Hort, Vlastimil259249 #12946.39
74 Goldin, Alexander259150 #13025.26
75 Pigusov, Evgeny258951 #13329.17
76 Olafsson, Helgi258649 #13533.79
77 Makarichev, Sergey Y258652 #13736.54
78 Hansen, Curt258650 #13625.70
79 Adams, Michael258549 #13518.54
80 Hjartarson, Jóhann258548 #13527.31
81 Cherepkov, Alexander V2585760.1% #15469.59
82 Romanishin, Oleg M258448 #13638.39
83 Pétursson, Margeir258448 #13630.29
84 Neverov, Valery258252 #14025.94
85 Kuzmin, Gennady P258253 #14244.37
86 Malaniuk, Vladimir P258048 #14032.86
87 Pintér, József258052 #14336.56
88 Fedorowicz, John P258049 #14131.68
89 Spassky, Boris V257949 #14253.34
90 Chandler, Murray G257948 #14130.16
91 Vasiukov, Evgeny A257850 #14557.24
92 van der Wiel, John T H257847 #14330.81
93 Sturua, Zurab257766 #15530.97
94 Yakovich, Yuri257752 #14527.50
95 Glek, Igor V257753 #14828.57
96 Yermolinsky, Alex V257556 #15032.14
97 Rashkovsky, Nukhim N257552 #14844.12
98 Panchenko, Alexander N257553 #14836.65
99 Kharitonov, Andrey Y257550 #14731.16
100 Todorcevic, Miodrag257549 #14749.56
101 Ftácnik, Lubomír257448 32.59
102 Dlugy, Maxim257349 24.34
103 Ivanov, Alexander V257351 34.08
104 Smejkal, Jan257350 44.19
105 Larsen, Bent257349 55.24
106 Quinteros, Miguel A257259 42.43
107 Kengis, Edvins257253 31.14
108 Ionov, Sergey257264 28.40
109 Taimanov, Mark E257057 64.32
110 Benjamin, Joel L257048 26.22
111 Nogueiras, Jesus256949 30.87
112 Smagin, Sergey256949 31.73
113 Averkin, Orest N256973 46.27
114 Shabanov, Yury F256863 52.55
115 Ubilava, Elizbar E256851 39.76
116 Torre, Eugenio256852 38.57
117 Chekhov, Valery A256850 34.51
118 Kurajica, Bojan256762 42.54
119 Geller, Efim P256750 65.25
120 Akopian, Vladimir256650 18.48
121 Hodgson, Julian M256648 26.85
122 Vaulin, Alexander256665 33.20
123 Spraggett, Kevin B256449 35.56
124 Tseshkovsky, Vitaly V256350 45.68
125 Giorgadze, Giorgi256353 25.64
126 Ulibin, Mikhail256251 18.99
127 Kveinys, Aloyzas256159 27.89
128 Krasenkow, Michal256150 26.55
129 Khenkin, Igor256053 22.19
130 Palac, Mladen256055 19.29
131 Huzman, Alexander255953 28.14
132 Janjgava, Lasha255953 20.07
133 Shneider, Aleksandr255856 28.03
134 Soppe, Guillermo255762 29.71
135 Donchev, Dimitar I255656 31.86
136 Gorelov, Sergey G255563 32.79
137 Kuzmin, Alexey255555 27.23
138 Arkhipov, Sergey255461 35.93
139 Popovic, Petar255350 31.30
140 Velimirovic, Dragoljub255351 48.05
141 Suba, Mihai255351 42.99
142 Morovic Fernández, Iván E255255 27.19
143 Mestel, A Jonathan255256 33.22
144 Sosonko, Gennadi255253 47.04
145 Cvitan, Ognjen255149 28.64
146 Sokolov, Ivan255150 21.96
147 Vaisser, Anatoli255050 41.24
148 Zapata, Alonso255050 31.78
149 Hulak, Krunoslav254950 39.02
150 Naumkin, Igor254854 24.81
151 Kholmov, Ratmir D254851 65.05
152 Rogers, Ian254750 29.93
153 Kochiev, Alexander254752 34.18
154 Kavalek, Lubomir254763 46.81
155 Orlov, Georgi254656
156 Kindermann, Stefan254448 30.43
157 Mikhalchishin, Adrian B254450 35.54
158 Wahls, Matthias254449 22.35
159 Rohde, Michael A254452 30.76
160 Lalic, Bogdan254450 26.23
161 Rachels, Stuart254358 20.68
162 Chiburdanidze, Maia G254352 29.37
163 Kudrin, Sergey254250 30.73
164 Magerramov, Elmar S254252 32.14
165 Anikaev, Yury254269 41.92
166 Najdorf, Miguel254171 80.13
167 Bikhovsky, Avigdor I254158 35.24
168 Adorján, András254151 40.17
169 King, Daniel J254149 26.76
170 Kaidanov, Gregory S254151 30.64
171 Tischbierek, Raj254052 27.69
172 Ye Rongguang254059 26.66
173 Minasian, Artashes254054 23.36
174 Milos, Gilberto254053 26.59
175 Lobron, Eric253949 30.07
176 Lanka, Zigurds253955 30.03
177 Cebalo, Mišo253850 45.32
178 Ye Jiangchuan253759 29.53
179 Petrienko, Vladimir253763 35.23
180 Sorokin, Maxim253753 22.36
181 Zhuravliov, Valerij253662 51.47
182 Browne, Walter S253650 41.39
183 Arnason, Jon L253649 29.55
184 Serper, Grigory253654 20.71
185 Machulsky, Anatoly D253556 33.69
186 Groszpeter, Attila253550 29.97
187 Khmelnitsky, Igor N253561 21.78
188 Knaak, Rainer F253351 37.21
189 Gheorghiu, Florin253351 46.15
190 Wolff, Patrick G253350 22.29
191 Zagrebelny, Sergey253363
192 Ziatdinov, Raset253264 31.43
193 Kožul, Zdenko253249 24.03
194 Zlotnik, Boris A253164 43.63
195 Horvath, Jozsef253149 25.80
196 Karpman, Vadim253155 25.05
197 Mnatsakanian, Eduard A253173 51.48
198 Wilder, Michael253053 27.71
199 Duer, Arne252965 30.89
200 Greenfeld, Alon252852 26.12
201 Ivanovic, Božidar252850 43.77
202 Ruban, Vadim252853 25.96
203 Alburt, Lev O252752 44.78
204 Sherbakov, Ruslan252758 20.71
205 Frolov, Artur252657 19.84
206 Kuporosov, Viktor252666 28.68
207 Kovacevic, Vladimir252551 48.18
208 Kalinitschew, Sergey252565 34.33
209 Hebden, Mark252550 32.29
210 Vitolinš, Alvis252558 43.95
211 Damljanovic, Branko252548 28.95
212 Rodriguez, Amador252450 33.73
213 Darga, Klaus V252464 56.27
214 Chudinovskih, Alexander252470 23.22
215 Vorotnikov, Vladislav V252465 42.79
216 Illescas Cordoba, Miguel252450 24.49
217 Tseitlin, Mark D252361 46.69
218 Moskalenko, Viktor252351 29.49
219 Uhlmann, Wolfgang252251 55.17
220 Espig, Lutz252255 41.40
221 Georgadze, Tamaz V252264 42.56
222 Karlsson, Lars252151 34.89
223 Bönsch, Uwe252050 31.63
224 Hellers, Ferdinand251948 21.34
225 Malisauskas, Vidmantas251955 26.82
226 Komarov, Dimitri251963 21.50
227 Lukin, Andrei M251953 41.76
228 Gofshtein, Leonid D251972 37.11
229 Sher, Miron N251854 37.92
230 Polgar, Zsuzsa251749 21.12
231 Dizdar, Goran251752 31.49
232 Frias, Victor J251656 34.31
233 Wojtkiewicz, Aleksander251649 27.38
234 Pfleger, Helmut251556 46.82
235 Bagirov, Vladimir K251551 53.79
236 Mokrý, Karel251551 31.32
237 Anastasian, Ashot251553 25.87
238 Lautier, Joel251549 17.14
239 Lin Ta251463 27.33
240 Baburin, Alexander251463 23.28
241 Bischoff, Klaus251448 28.97
242 Petrosian, Arshak B251450 36.46
243 Henley, Ron W251467 33.49
244 Bass, Leonid251461 33.00
245 Vera, Reynaldo251352 29.40
246 Marin, Mihail251354 25.11
247 Gipslis, Aivars251362 53.31
248 Magomedov, Magaram251355 24.03
249 Arbakov, Valentin251357 38.34
250 Meshkov, Yuri A251372 40.37
251 London, Dimitri251373 27.53
252 Ivanov, Igor V251252 43.40
253 Cámpora, Daniel H251150 32.92
254 Csom, István251150 49.99
255 Veingold, Aleksander251165 36.64
256 Adianto, Utut251165 25.21
257 Barua, Dibyendu251156 23.59
258 Unzicker, Wolfgang251056 64.92
259 Renet, Olivier251049 25.44
260 Savchenko, Stanislav251055 23.36
261 Inkiov, Ventzislav250951 34.03
262 Barbero, Gerardo F250851 28.78
263 Rodriguez Vargas, Orestes250855 46.91
264 Timoshenko, Georgy250751 23.99
265 Basin, Leonid250758 32.52
266 Gruenberg, Hans Ulrich250750 34.39
267 Palatnik, Semen A250654 40.18
268 Shabalov, Alexander250653 22.72
269 Belov, Igor250560
270 Yrjola, Jouni250551 30.60
271 Kiselev, Sergey250554 28.71
272 Gufeld, Eduard E250456 54.20
273 Gruenfeld, Yehuda250453 34.26
274 Matulovic, Milan250356 54.97
275 Hertneck, Gerald250254 26.70
276 Faragó, Iván250149 44.16
277 Guseinov, Aidyn250063 38.41
278 Graf, Alexander250062 27.77
279 Meduna, Eduard250050 39.72
280 Rechlis, Gad250055 23.32
281 Piket, Jeroen250048 21.34
282 Loginov, Valery A250063 34.47
283 Ghinda, Mihail Viorel250058 40.85
284 Franco Ocampos, Zenon249953 34.05
285 Cid, Marino Alejandro249967 31.96
286 Moroz, Alexander249957 29.37
287 Savon, Vladimir A249953 49.68
288 Tseitlin, Mikhail S249851 42.95
289 Cramling, Pia249851 27.11
290 Panno, Oscar R249753 55.21
291 Yuneev, Alexey249754
292 Kishnev, Sergey249763 33.58
293 Liberzon, Vladimir M249759 53.19
294 Reyes, Juan249766 27.10
295 Simic, Radoslav249659 41.97
296 Nikolac, Juraj249660 58.11
297 Watson, William N249649 28.12
298 Andrianov, Nikolai249663 28.45
299 Sellos, Didier249665 33.28
300 Tunik, Gennady249656 37.01
301 Vukic, Milan249655 46.78
302 Djuric, Stefan249651 34.85
303 Klinger, Josef249650 22.98
304 Xu Jun249458 27.71
305 Mochalov, Evgeny V249471 38.59
306 Rausis, Igors249455 29.15
307 Georgiev, Krum249451 32.02
308 Lau, Ralf249450 30.62
309 Hazai, Laszlo249455 36.96
310 Brodsky, Michail249360 21.18
311 Gligoric, Svetozar249353 67.33
312 Van der Sterren, Paul249349 34.21
313 Hansen, Lars Bo249349 21.69
314 Marjanovic, Slavoljub249352 35.40
315 Foisor, Ovidiu249359 31.15
316 Norwood, David249354 21.66
317 Stohl, Igor249250 25.68
318 Kallai, Gabor249254 31.28
319 Barbulescu, Dan249170 25.93
320 Ivkov, Borislav249154 56.55
321 Popchev, Milko249154 25.55
322 Vogt, Lothar H249051 38.37
323 Mainka, Romuald249051 27.04
324 Hickl, Joerg249050 25.12
325 Kosten, Anthony C249048 31.85
326 Gaprindashvili, Nona248957 49.08
327 Fernandez Garcia, Jose Luis248955 36.08
328 Kupreichik, Viktor D248950 40.91
329 Filipenko, Alexander V248866 41.24
330 Piskov, Yury248855 28.64
331 García Gonzáles, Guillermo248753 36.48
332 Gleizerov, Evgeny248763 27.20
333 Bronstein, David I248753 66.28
334 Zaichik, Gennady L248751 33.30
335 Ree, Hans248754 45.71
336 Ornstein, Axel248662 38.10
337 Ninov, Kiril248654 21.65
338 Kosic, Dragan248657 20.29
339 Petkevich, Jusefs248664 49.45
340 Murey, Yakov248651 48.83
341 Granda Zuńiga, Julio E248553 23.27
342 Dzuban, Oleg I248565
343 Rivas Pastor, Manuel248454 29.88
344 Makarov, Marat248455 27.07
345 Ernst, Thomas248350 29.79
346 Antunes, Antonio248353 28.32
347 Edelman, Daniel248259 21.26
348 Jansa, Vlastimil248251 47.51
349 Mortensen, Erling248150 35.15
350 Rajkovic, Dusan248152 47.95
351 Root, Douglas248167 27.30
352 Barlov, Dragan248150 33.34
353 Pekarek, Ales248053 28.46
354 Rubinetti, Jorge A248059 45.17
355 Kantsler, Boris248055 28.12
356 Meister, Peter248057 23.93
357 Abramovic, Boško247951 39.30
358 Sahovic, Dragutin247965 49.81
359 Mascarinas, Rico247856 37.25
360 Tolnai, Tibor247849 25.69
361 Brunner, Lucas247748 23.01
362 Plaskett, Jim247753 30.20
363 Govedarica, Radovan247766 42.30
364 Schussler, Harry247651 32.93
365 Wedberg, Tom247650 36.51
366 Thorhallsson, Throstur247657 21.20
367 Schmittdiel, Eckhard247650 30.05
368 Flear, Glenn C247549 31.30
369 Zhidkov, Valery S247563 50.74
370 Novik, Maxim247568 26.47
371 Ionescu, Constantin247555 31.72
372 Kotronias, Vasilios247451 25.77
373 Brooks, Michael A247458 29.12
374 Byrne, Robert E247457 62.11
375 Kozlov, V.247370
376 Thorsteins, Karl247352 25.63
377 Khasin, Alexander247360 39.09
378 Kouatly, Bachar247352 32.24
379 Averbakh, Yury L247370 68.31
380 Saltaev, Mihail247366 27.53
381 Sideif Sade, Fikret I247365 38.41
382 Wang Zili247260 21.96
383 Gutman, Lev247251 44.68
384 Sznapik, Aleksander247250 39.31
385 Mednis, Edmar J247253 53.19
386 Strikovic, Aleksa247153 29.05
387 Lein, Anatoly247154 59.18
388 Davies, Nigel R247149 29.83
389 Meyer, E.247173
390 Varavin, Viktor247166 23.02
391 Tabatadze, Tamaz247168 22.17
392 Kraidman, Yair247063 57.58
393 Drasko, Milan247051 27.48
394 Meister, Yakov247058 34.72
395 Lukacs, Peter246950 39.89
396 Nikolenko, Oleg246963 30.94
397 Moiseev, Viktor246973 31.05
398 Dizdarevic, Emir246852 32.16
399 Braga, Fernando246856 31.89
400 Ekstroem, Roland246858 34.03
401 Szekely, Peter246855 35.31
402 Prandstetter, Eduard246753 41.46
403 Reshevsky, Samuel H246762 78.51
404 Schmidt, Wlodzimierz246649 47.14
405 Sunye Neto, Jaime246553 33.08
406 Dimitrov, Vladimir246556 22.14
407 Bruk, Ofer246556 22.38
408 Reeh, Oliver246555 26.37
409 Mirkovic, Slobodan246566 31.84
410 Zilberman, Nathan R246558 50.08
411 Mukhametov, Eldar246566 21.03
412 Nemet, Ivan246556 47.13
413 Kuczynski, Robert246549 24.12
414 Kogan, Boris246471
415 Finegold, Benjamin246453 20.73
416 Ledger, Andrew246463 21.02
417 Zilberstein, Valery I246471 47.13
418 Skembris, Spyridon246351 32.28
419 Gurevich, Vladimir246360 30.82
420 Kharlov, Andrei246367 21.53
421 Gurgenidze, Bukhuti I246361 56.55
422 Efimov, Igor246263 29.71
423 Tringov, Georgy P246257 53.23
424 Horváth, Csaba246252 21.98
425 Titov, German246262 27.10
426 Lendwai, Reinhard246160 23.63
427 Pytel, Krzysztof246159 45.04
428 Negulescu, Adrian246166 28.97
429 Klundt, Klaus246060 48.43
430 Blatny, Pavel246049 21.94
431 Arkell, Keith C246053 29.40
432 Piasetski, Leon David245964
433 Dueball, Juergen245971 45.17
434 Arencibia, Walter245952 22.86
435 Rukavina, Josip245963 47.51
436 Cabrilo, Goran245851 31.91
437 Kolev, Atanas245854 22.88
438 Ikonnikov, Vyacheslav245864 24.21
439 Winants, Luc245852 27.41
440 Haba, Petr245751 25.40
441 Sadler, Matthew245762 16.04
442 Vilela, Jose Luis245762 37.20
443 Fiorito, Fabian245757 20.58
444 Filipovic, Branko245659 32.65
445 Renman, Nils Gustaf245664
446 Miralles, Gilles245650 24.31
447 Orso, Miklos245666 33.97
448 Lutz, Christopher245654 19.27
449 Pribyl, Josef245553 42.64
450 Lukov, Valentin245555 34.47
451 Polgar, Judit245551 13.86
452 Tempone, Marcelo245557 27.73
453 Zhelnin, Vladimir V245561 43.22
454 Akhmilovskaya, Elena245564
455 Murshed, Niaz245558 24.05
456 Ostermeyer, Peter245462 46.64
457 Mohr, Georg245455 25.33
458 Moldobaev, Emelbek245460
459 Kirov Ivanov, Nino245452 44.73
460 Trapl, Jindrich245468 48.19
461 Karolyi, Tibor Jr245454 28.54
462 Gallagher, Joseph G245350 26.07
463 Padevsky, Nikola B245362 57.01
464 Zelcic, Robert245368 24.69
465 Nijboer, Friso245352 25.01
466 Neckar, Lubomir245275 39.83
467 Gruenenwald, Joerg245268 24.98
468 Yuferov, Sergey N245262 44.49
469 Dutreeuw, Marc245260 30.28
470 Gonzalez, JA.245273
471 Knezevic, Milorad245156 53.58
472 Beshukov, Sergei245171 19.16
473 Raicevic, Momcilo245061
474 Gomez Baillo, Jorge H245056 31.12
475 Djurhuus, Rune245054 20.35
476 Bergstrom, Christer245062 31.68
477 Ermenkov, Evgenij245053 40.67
478 Lima, Darcy245065 28.03
479 Levin, Felix245059 31.57
480 Graf, Juergen244958 27.17
481 Rakic, Tomislav244974 55.55
482 Bellon Lopez, Juan Manuel244952 40.06
483 Avshalumov, Alex244957 26.25
484 Kovacevic, Predrag244967 29.73
485 Ioseliani, Nana244957 28.30
486 Servat, Roberto244861 22.32
487 Tisdall, Jonathan D244850 31.76
488 Gostisa, Leon244854 29.17
489 Ilincic, Zlatko244852 22.06
490 Komljenovic, Davor244856 45.91
491 Legky, Nikolay A244857 35.14
492 Pichler, Juergen244858 28.99
493 Temirbaev, Serik244861
494 Howell, James C244851 23.04
495 Shmuter, Leonid244770 21.08
496 Fominyh, Alexander244766 30.95
497 Levitt, Jonathan244750 26.99
498 Sakaev, Konstantin244765 16.13
499 Lechtynsky, Jiri244753 42.52
500 Schulte, Oliver244770 21.44

These ratings, calculated as of May 31, 1990, incorporate all games (against rated opponents) played in the time between June 1, 1989 and May 31, 1990, along with the ratings that were already calculated as of May 31, 1989. 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, 1990. This represents the player's estimated strength on June 1, 1990.

+/- 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, 1990. The +/- value represents the standard deviation of that estimate; the player's true strength on June 1, 1990 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, 1990. 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, 1990. 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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