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Top 10 active players as of June 30, 1990

  #  

Player Rating +/-
1 Kasparov, Garry K285148
2 Karpov, Anatoly E280048
3 Ivanchuk, Vassily272548
4 Gelfand, Boris272448
5 Timman, Jan H271048
6 Salov, Valery B270150
7 Korchnoi, Viktor L269347
8 Gurevich, Mikhail N268648
9 Yudasin, Leonid G268349
10 Short, Nigel D267947

About these ratings

Top 500 active players as of June 30, 1990

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28514873.4% #227.21
2 Karpov, Anatoly E28004820.8% #339.10
3 Ivanchuk, Vassily2725481.4% #1621.28
4 Gelfand, Boris2724481.3% #1622.02
5 Timman, Jan H2710480.6% #2138.54
6 Salov, Valery B2701500.5% #2726.09
7 Korchnoi, Viktor L2693470.3% #3059.27
8 Gurevich, Mikhail N2686480.2% #3531.36
9 Yudasin, Leonid G2683490.2% #3830.89
10 Short, Nigel D2679470.2% #3925.08
11 Beliavsky, Alexander G2679480.1% #4036.54
12 Khalifman, Alexander2679490.1% #4024.45
13 Ehlvest, Jaan2672480.1% #4427.71
14 Speelman, Jonathan S2667480.1% #4933.74
15 Andersson, Ulf2667480.1% #4939.01
16 Dolmatov, Sergey V266548 #5131.36
17 Seirawan, Yasser266347 #5230.27
18 Bareev, Evgeny266149 #5523.61
19 Jussupow, Artur M266048 #5630.38
20 Lputian, Smbat G2659490.1% #5732.38
21 Nunn, John D M265848 #5835.18
22 Tiviakov, Sergei2655560.1% #6417.38
23 Polugaevsky, Lev A265549 #6055.61
24 Dautov, Rustem265351 #6324.59
25 Ribli, Zoltán264749 #6838.81
26 Dreev, Alexey264548 #6921.44
27 Hübner, Robert264248 #7341.65
28 Portisch, Lajos264148 #7453.24
29 Nikolic, Predrag264048 #7429.80
30 Yurtaev, Leonid263952 #7831.16
31 Chernin, Alexander M263848 #7630.31
32 Ljubojevic, Ljubomir263848 #7739.66
33 Gavrikov, Victor N263450 #8332.91
34 Sax, Gyula263348 #8139.03
35 Vaganian, Rafael A263348 #8238.71
36 Agdestein, Simen263250 #8523.12
37 Tal, Mikhail263148 #8553.64
38 Aseev, Konstantin N263051 #8729.69
39 Razuvaev, Yury S262650 #9044.72
40 Anand, Viswanathan262349 #9320.55
41 Dzindzichashvili, Roman Y262351 #9546.15
42 Balashov, Yury S262348 #9441.30
43 Dorfman, Iosif D262251 #9638.16
44 Miles, Anthony J262248 #9435.19
45 Georgiev, Kiril262148 #9624.59
46 Azmaiparashvili, Zurab A262049 #9730.29
47 Gulko, Boris F261948 #9743.39
48 Christiansen, Larry M261850 #10034.01
49 Epishin, Vladimir261850 #10124.96
50 Vyzmanavin, Alexey261751 #10230.49
51 Kramnik, Vladimir261761 #10915.01
52 Eingorn, Viacheslav S261549 #10233.60
53 Shirov, Alexei261550 #10317.98
54 Vladimirov, Evgeny Y261551 #10633.44
55 Dvoiris, Semen I261550 #10431.66
56 Sokolov, Andrey Y261448 #10227.28
57 Sveshnikov, Evgeny E261452 #10640.38
58 Smirin, Ilia261149 #10822.44
59 Kamsky, Gata260951 #11116.08
60 deFirmian, Nicholas E260748 #11132.92
61 Hjartarson, Jóhann260548 #11327.39
62 Oll, Lembit260549 #11524.19
63 Rozentalis, Eduardas260451 #11727.09
64 Psakhis, Lev B260448 #11431.59
65 Kruppa, Yuri260355 #12326.02
66 Tukmakov, Vladimir B259848 #12144.29
67 Novikov, Igor A259750 #12428.10
68 Hort, Vlastimil259649 #12446.47
69 Kovalev, Andrei259657 #13028.65
70 Yermolinsky, Alex V259655 #12932.22
71 Romanishin, Oleg M259648 #12438.47
72 Panchenko, Alexandar G259471 #14229.23
73 Pigusov, Evgeny259252 #13129.25
74 Hansen, Curt259149 #13025.78
75 Dokhoian, Yury259150 #13125.68
76 Makarichev, Sergey Y259052 #13336.62
77 Olafsson, Helgi258749 #13433.87
78 Lerner, Konstantin Z258650 #13640.34
79 Adams, Michael258648 #13518.62
80 Smyslov, Vassily V258649 #13669.27
81 Timoshchenko, Gennady258551 #13841.17
82 Goldin, Alexander258550 #13825.34
83 Pintér, József258453 #14036.64
84 Kuzmin, Gennady P258453 #14144.45
85 Kengis, Edvins258352 #14131.22
86 Kharitonov, Andrey Y258351 #13931.24
87 Fedorowicz, John P258349 #13931.76
88 Neverov, Valery258252 #14226.02
89 Pétursson, Margeir258148 #14030.37
90 Smagin, Sergey258049 #14231.81
91 Benjamin, Joel L257948 #14226.30
92 Malaniuk, Vladimir P257948 #14232.94
93 Chandler, Murray G257948 #14330.24
94 Rashkovsky, Nukhim N257952 #14544.20
95 Spassky, Boris V257949 #14353.42
96 Yakovich, Yuri257852 #14527.58
97 Glek, Igor V257853 #14628.65
98 Vasiukov, Evgeny A257851 #14657.32
99 Averkin, Orest N257873 #15946.35
100 Taimanov, Mark E257758 #15164.40
101 Larsen, Bent257649 55.32
102 Todorcevic, Miodrag257649 49.64
103 Smejkal, Jan257550 44.27
104 Quinteros, Miguel A257559 42.51
105 Ftácnik, Lubomír257348 32.67
106 Sturua, Zurab257366 31.06
107 Shabanov, Yury F257263 52.63
108 Ionov, Sergey257264 28.48
109 Kurajica, Bojan257161 42.62
110 Torre, Eugenio257051 38.65
111 Chekhov, Valery A257050 34.59
112 Panchenko, Alexander N256953 36.73
113 Tseshkovsky, Vitaly V256950 45.76
114 Akopian, Vladimir256950 18.56
115 Geller, Efim P256851 65.33
116 Ivanov, Alexander V256751 34.16
117 Nogueiras, Jesus256749 30.95
118 Dlugy, Maxim256749 24.42
119 Giorgadze, Giorgi256653 25.72
120 Vaulin, Alexander256665 33.28
121 Hodgson, Julian M256648 26.92
122 van der Wiel, John T H256547 30.89
123 Ulibin, Mikhail256551 19.08
124 Khenkin, Igor256153 22.27
125 Spraggett, Kevin B256149 35.64
126 Soppe, Guillermo256162 29.79
127 Donchev, Dimitar I256156 31.94
128 Huzman, Alexander256053 28.22
129 Morovic Fernández, Iván E255855 27.27
130 Krasenkow, Michal255851 26.63
131 Cvitan, Ognjen255750 28.72
132 Sosonko, Gennadi255654 47.12
133 Sokolov, Ivan255649 22.05
134 Suba, Mihai255651 43.08
135 Popovic, Petar255549 31.38
136 Velimirovic, Dragoljub255551 48.13
137 Kuzmin, Alexey255555 27.31
138 Shneider, Aleksandr255456 28.11
139 Gorelov, Sergey G255463 32.87
140 Vaisser, Anatoli255450 41.32
141 Mestel, A Jonathan255356 33.30
142 Arkhipov, Sergey255357 36.02
143 Kavalek, Lubomir255264 46.89
144 Ubilava, Elizbar E255151 39.84
145 Wahls, Matthias255149 22.43
146 Janjgava, Lasha255053 20.15
147 Naumkin, Igor255054 24.89
148 Browne, Walter S255050 41.47
149 Kholmov, Ratmir D254951 65.13
150 Damljanovic, Branko254948 29.04
151 Kaidanov, Gregory S254851 30.72
152 Hulak, Krunoslav254750 39.10
153 Magerramov, Elmar S254752 32.22
154 Anikaev, Yury254769 42.00
155 Rohde, Michael A254752 30.84
156 Kudrin, Sergey254650 30.81
157 Najdorf, Miguel254571 80.21
158 Chiburdanidze, Maia G254552 29.45
159 Kveinys, Aloyzas254556 27.97
160 Bikhovsky, Avigdor I254558 35.32
161 Lanka, Zigurds254455 30.11
162 Kindermann, Stefan254448 30.51
163 Tischbierek, Raj254452 27.77
164 Mikhalchishin, Adrian B254350 35.62
165 Zapata, Alonso254250 31.86
166 Minasian, Artashes254254 23.44
167 King, Daniel J254249 26.84
168 Lalic, Bogdan254150 26.31
169 Ye Jiangchuan254159 29.61
170 Milos, Gilberto254153 26.67
171 Petrienko, Vladimir254063 35.31
172 Orlov, Georgi254056
173 Cebalo, Mišo254050 45.40
174 Arnason, Jon L253949 29.63
175 Serper, Grigory253954 20.79
176 Zhuravliov, Valerij253962 51.55
177 Rogers, Ian253949 30.02
178 Kožul, Zdenko253849 24.11
179 Sorokin, Maxim253853 22.44
180 Lobron, Eric253748 30.15
181 Ivanovic, Božidar253750 43.85
182 Gheorghiu, Florin253752 46.23
183 Zagrebelny, Sergey253663
184 Adorján, András253650 40.25
185 Khmelnitsky, Igor N253561 21.86
186 Knaak, Rainer F253451 37.29
187 Duer, Arne253465 30.96
188 Kochiev, Alexander253452 34.26
189 Karpman, Vadim253355 25.13
190 Wilder, Michael253353 27.79
191 Mnatsakanian, Eduard A253373 51.56
192 Zlotnik, Boris A253364 43.71
193 Wolff, Patrick G253250 22.37
194 Tseitlin, Mark D253261 46.77
195 Frolov, Artur253157 19.91
196 Vitolinš, Alvis253158 44.04
197 Lautier, Joel253149 17.22
198 Kuporosov, Viktor253059 28.76
199 Shabalov, Alexander253052 22.80
200 Mokrý, Karel253051 31.40
201 Ruban, Vadim253053 26.05
202 Wojtkiewicz, Aleksander252949 27.46
203 Ziatdinov, Raset252964 31.51
204 Sher, Miron N252954 38.00
205 Palac, Mladen252953 19.37
206 Sherbakov, Ruslan252958 20.79
207 Rachels, Stuart252955 20.76
208 Groszpeter, Attila252950 30.06
209 Hellers, Ferdinand252748 21.42
210 Hebden, Mark252750 32.37
211 Darga, Klaus V252764 56.35
212 Rodriguez, Amador252750 33.81
213 Alburt, Lev O252652 44.86
214 Kalinitschew, Sergey252665 34.41
215 Greenfeld, Alon252653 26.20
216 Illescas Cordoba, Miguel252550 24.57
217 Horvath, Jozsef252449 25.88
218 Chudinovskih, Alexander252470 23.30
219 Bagirov, Vladimir K252452 53.87
220 Machulsky, Anatoly D252358 33.77
221 Marin, Mihail252353 25.19
222 Espig, Lutz252355 41.48
223 Ye Rongguang252356 26.74
224 Veingold, Aleksander252264 36.72
225 Malisauskas, Vidmantas252255 26.90
226 Moskalenko, Viktor252251 29.57
227 Bönsch, Uwe252250 31.71
228 Uhlmann, Wolfgang252252 55.25
229 Georgadze, Tamaz V252264 42.64
230 Komarov, Dimitri252163 21.58
231 Bischoff, Klaus252149 29.06
232 Gofshtein, Leonid D252172 37.19
233 Frias, Victor J252056 34.39
234 Rechlis, Gad252053 23.40
235 Karlsson, Lars251951 34.96
236 Pfleger, Helmut251957 46.90
237 Vorotnikov, Vladislav V251866 42.87
238 Barua, Dibyendu251857 23.67
239 London, Dimitri251873 27.61
240 Petrosian, Arshak B251850 36.54
241 Barbero, Gerardo F251752 28.86
242 Magomedov, Magaram251655 24.11
243 Henley, Ron W251667 33.57
244 Kovacevic, Vladimir251651 48.26
245 Vera, Reynaldo251553 29.48
246 Arbakov, Valentin251457 38.42
247 Baburin, Alexander251463 23.36
248 Yuneev, Alexey251455
249 Anastasian, Ashot251453 25.95
250 Adianto, Utut251465 25.29
251 Franco Ocampos, Zenon251453 34.13
252 Cámpora, Daniel H251450 32.99
253 Dizdar, Goran251352 31.57
254 Csom, István251350 50.08
255 Unzicker, Wolfgang251356 65.01
256 Piket, Jeroen251348 21.42
257 Cid, Marino Alejandro251369 32.05
258 Watson, William N251349 28.20
259 Savchenko, Stanislav251255 23.44
260 Gipslis, Aivars251261 53.39
261 Gufeld, Eduard E251256 54.28
262 Meshkov, Yuri A251272 40.45
263 Kishnev, Sergey251262 33.66
264 Polgar, Zsuzsa251249 21.20
265 Renet, Olivier251149 25.52
266 Hansen, Lars Bo251049 21.77
267 Vukic, Milan251055 46.86
268 Gruenberg, Hans Ulrich250950 34.47
269 Gruenfeld, Yehuda250953 34.34
270 Basin, Leonid250958 32.60
271 Timoshenko, Georgy250951 24.08
272 Gaprindashvili, Nona250856 49.16
273 Faragó, Iván250849 44.24
274 Stohl, Igor250849 25.76
275 Yrjola, Jouni250851 30.68
276 Ivanov, Igor V250852 43.48
277 Andrianov, Nikolai250763 28.53
278 Inkiov, Ventzislav250750 34.11
279 Lukin, Andrei M250754 41.84
280 Matulovic, Milan250556 55.05
281 Hertneck, Gerald250453 26.78
282 Kosten, Anthony C250348 31.93
283 Zhidkov, Valery S250358 50.82
284 Kallai, Gabor250354 31.36
285 Tseitlin, Mikhail S250352 43.04
286 Rodriguez Vargas, Orestes250254 46.98
287 Tolnai, Tibor250249 25.77
288 Belov, Igor250261
289 Mochalov, Evgeny V250271 38.67
290 Nikolac, Juraj250260 58.19
291 Kiselev, Sergey250254 28.79
292 Kupreichik, Viktor D250250 40.98
293 Lau, Ralf250250 30.70
294 Savon, Vladimir A250153 49.76
295 Reyes, Juan250166 27.18
296 Liberzon, Vladimir M250059 53.27
297 Graf, Alexander250061 27.85
298 Tunik, Gennady249956 37.09
299 Guseinov, Aidyn249962 38.49
300 Loginov, Valery A249958 34.55
301 Meduna, Eduard249950 39.80
302 Simic, Radoslav249959 42.06
303 Panno, Oscar R249853 55.29
304 Moroz, Alexander249857 29.45
305 Ghinda, Mihail Viorel249858 40.92
306 Klinger, Josef249850 23.06
307 Lin Ta249858 27.41
308 Sellos, Didier249765 33.36
309 Bass, Leonid249759 33.08
310 Palatnik, Semen A249754 40.26
311 Van der Sterren, Paul249749 34.29
312 Barbulescu, Dan249670 26.02
313 Piskov, Yury249655 28.72
314 Gligoric, Svetozar249653 67.41
315 Ivkov, Borislav249654 56.63
316 Georgiev, Krum249551 32.10
317 Brodsky, Michail249560 21.26
318 Hickl, Joerg249350 25.20
319 Xu Jun249359 27.79
320 Bronstein, David I249253 66.36
321 Vogt, Lothar H249251 38.45
322 Rausis, Igors249255 29.23
323 Norwood, David249253 21.74
324 García Gonzáles, Guillermo249253 36.56
325 Marjanovic, Slavoljub249152 35.48
326 Jansa, Vlastimil249151 47.59
327 Petkevich, Jusefs249164 49.53
328 Kotronias, Vasilios249052 25.85
329 Govedarica, Radovan249067 42.38
330 Hazai, Laszlo249056 37.04
331 Filipenko, Alexander V249066 41.32
332 Kosic, Dragan248957 20.37
333 Popchev, Milko248954 25.63
334 Fernandez Garcia, Jose Luis248855 36.16
335 Cramling, Pia248851 27.19
336 Djuric, Stefan248851 34.92
337 Gleizerov, Evgeny248762 27.28
338 Antunes, Antonio248653 28.40
339 Zaichik, Gennady L248651 33.38
340 Foisor, Ovidiu248659 31.23
341 Schoenthier, Frank248676 31.62
342 Pekarek, Ales248653 28.54
343 Makarov, Marat248555 27.15
344 Mednis, Edmar J248553 53.27
345 Murey, Yakov248452 48.91
346 Mortensen, Erling248451 35.23
347 Granda Zuńiga, Julio E248452 23.35
348 Ionescu, Constantin248356 31.80
349 Rubinetti, Jorge A248359 45.25
350 Mainka, Romuald248351 27.12
351 Meister, Peter248357 24.01
352 Sahovic, Dragutin248365 49.89
353 Lutz, Christopher248353 19.35
354 Schmidt, Wlodzimierz248249 47.22
355 Brunner, Lucas248148 23.09
356 Barlov, Dragan248150 33.42
357 Abramovic, Boško248150 39.38
358 Ernst, Thomas248150 29.87
359 Schussler, Harry248051 33.02
360 Plaskett, Jim248053 30.28
361 Schmittdiel, Eckhard248050 30.13
362 Wedberg, Tom248050 36.59
363 Ninov, Kiril247954 21.73
364 Flear, Glenn C247949 31.38
365 Sunye Neto, Jaime247852 33.16
366 Ornstein, Axel247864 38.18
367 Kouatly, Bachar247853 32.32
368 Dzuban, Oleg I247873
369 Saltaev, Mihail247866 27.61
370 Gutman, Lev247751 44.76
371 Drasko, Milan247751 27.56
372 Cabrilo, Goran247751 31.99
373 Novik, Maxim247768 26.55
374 Strikovic, Aleksa247653 29.13
375 Mirkovic, Slobodan247566 31.92
376 Lukacs, Peter247550 39.97
377 Rivas Pastor, Manuel247555 29.96
378 Kraidman, Yair247563 57.66
379 Thorsteins, Karl247553 25.71
380 Kantsler, Boris247455 28.20
381 Varavin, Viktor247466 23.10
382 Khasin, Alexander247460 39.17
383 Kozlov, V.247470
384 Sideif Sade, Fikret I247465 38.49
385 Tabatadze, Tamaz247468 22.25
386 Wang Zili247360 22.04
387 Lein, Anatoly247353 59.26
388 Rajkovic, Dusan247352 48.04
389 Meister, Yakov247358 34.80
390 Davies, Nigel R247250 29.91
391 Ledger, Andrew247263 21.10
392 Tringov, Georgy P247258 53.31
393 Root, Douglas247168 27.38
394 Nikolenko, Oleg247163 31.03
395 Ekstroem, Roland247158 34.11
396 Reshevsky, Samuel H247162 78.59
397 Szekely, Peter247053 35.39
398 Dizdarevic, Emir247052 32.24
399 Dimitrov, Vladimir247056 22.22
400 Kogan, Boris246971
401 Miralles, Gilles246949 24.39
402 Kuczynski, Robert246949 24.20
403 Nemet, Ivan246856 47.21
404 Bruk, Ofer246856 22.46
405 Moiseev, Viktor246873 31.13
406 Brooks, Michael A246758 29.20
407 Djurhuus, Rune246755 20.43
408 Prandstetter, Eduard246753 41.54
409 Mukhametov, Eldar246666 21.11
410 Blatny, Pavel246649 22.02
411 Averbakh, Yury L246569 68.39
412 Lendwai, Reinhard246560 23.71
413 Stangl, Markus246552 21.17
414 Gurevich, Vladimir246560 30.90
415 Reeh, Oliver246553 26.45
416 Sznapik, Aleksander246550 39.39
417 Gurgenidze, Bukhuti I246561 56.63
418 Brenninkmeijer, Joris246551 20.79
419 Byrne, Robert E246556 62.19
420 Zilberstein, Valery I246571 47.21
421 Negulescu, Adrian246566 29.05
422 Kirov Ivanov, Nino246453 44.81
423 Titov, German246462 27.18
424 Kharlov, Andrei246367 21.61
425 Vilela, Jose Luis246362 37.28
426 Thorhallsson, Throstur246356 21.28
427 Anic, Darko246359 33.17
428 Rukavina, Josip246263 47.59
429 Dueball, Juergen246271 45.25
430 Winants, Luc246252 27.49
431 Trapl, Jindrich246270 48.27
432 Skembris, Spyridon246251 32.36
433 Haba, Petr246251 25.48
434 Efimov, Igor246261 29.79
435 Bellon Lopez, Juan Manuel246252 40.14
436 Sakaev, Konstantin246264 16.21
437 Pribyl, Josef246153 42.72
438 Tempone, Marcelo246157 27.81
439 Fokin, Sergey246164 34.71
440 Spasov, Vasil246154 19.37
441 Fiorito, Fabian246057 20.66
442 Finegold, Benjamin246054 20.81
443 Lukov, Valentin245954 34.55
444 Zhelnin, Vladimir V245961 43.30
445 Sadler, Matthew245962 16.12
446 Armas, Julius245956 35.18
447 Ikonnikov, Vyacheslav245963 24.29
448 Knezevic, Milorad245856 53.66
449 Arkell, Keith C245854 29.48
450 Akhmilovskaya, Elena245864
451 Yuferov, Sergey N245862 44.57
452 Stanojevic, Branko245872 47.49
453 Filipovic, Branko245856 32.73
454 Polgar, Judit245851 13.93
455 Arencibia, Walter245851 22.94
456 Kolev, Atanas245754 22.95
457 Murshed, Niaz245758 24.13
458 Castro Rojas, Oscar Humberto245766 37.14
459 Neckar, Lubomir245775 39.91
460 Ostermeyer, Peter245762 46.72
461 Mascarinas, Rico245754 37.33
462 Ermenkov, Evgenij245652 40.75
463 Gomez Baillo, Jorge H245656 31.20
464 Temirbaev, Serik245665
465 Renman, Nils Gustaf245667
466 Horváth, Csaba245651 22.07
467 Pytel, Krzysztof245659 45.12
468 Casper, Thomas245563 31.29
469 Padevsky, Nikola B245562 57.09
470 Beshukov, Sergei245571 19.24
471 Ree, Hans245453 45.79
472 Gonzalez, JA.245473
473 Levitt, Jonathan245450 27.07
474 Servat, Roberto245460 22.40
475 Kovacevic, Predrag245468 29.81
476 Raicevic, Momcilo245461
477 Braga, Fernando245355 31.97
478 Lima, Darcy245365 28.11
479 Schulte, Oliver245370 21.52
480 Lechtynsky, Jiri245353 42.60
481 Graf, Juergen245358 27.25
482 Zelcic, Robert245268 24.77
483 Nijboer, Friso245251 25.09
484 Tisdall, Jonathan D245250 31.84
485 Moldobaev, Emelbek245260
486 Pichler, Juergen245258 29.07
487 Howell, James C245251 23.12
488 Ioseliani, Nana245157 28.38
489 Gallagher, Joseph G245149 26.15
490 Womacka, Mathias245168 24.01
491 Orso, Miklos245064 34.06
492 Conquest, Stuart245049 23.33
493 Hausner, Ivan245053 38.21
494 Fominyh, Alexander244966 31.04
495 Staniszewski, Piotr244958 23.82
496 Semkov, Semko244955 30.34
497 Hresc, Vladimir244966 38.61
498 Ilincic, Zlatko244952 22.14
499 Levin, Felix244959 31.65
500 Shmuter, Leonid244870 21.16

These ratings, calculated as of June 30, 1990, incorporate all games (against rated opponents) played in the time between July 1, 1989 and June 30, 1990, along with the ratings that were already calculated as of June 30, 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 June 30, 1990. This represents the player's estimated strength on July 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 July 1, 1990. The +/- value represents the standard deviation of that estimate; the player's true strength on July 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 July 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 June 30, 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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