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Top 10 active players as of November 30, 1990

  #  

Player Rating +/-
1 Kasparov, Garry K283149
2 Karpov, Anatoly E279248
3 Ivanchuk, Vassily274148
4 Gelfand, Boris273348
5 Salov, Valery B270051
6 Yudasin, Leonid G269649
7 Gurevich, Mikhail N268848
8 Timman, Jan H268548
9 Korchnoi, Viktor L268447
10 Bareev, Evgeny268349

About these ratings

Top 500 active players as of November 30, 1990

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28314963.3% #227.63
2 Karpov, Anatoly E27924824.0% #439.52
3 Ivanchuk, Vassily2741484.3% #1121.70
4 Gelfand, Boris2733483.2% #1322.43
5 Salov, Valery B2700511.0% #2726.51
6 Yudasin, Leonid G2696490.6% #2831.31
7 Gurevich, Mikhail N2688480.4% #3331.77
8 Timman, Jan H2685480.3% #3438.95
9 Korchnoi, Viktor L2684470.3% #3559.69
10 Bareev, Evgeny2683490.3% #3624.02
11 Short, Nigel D2682470.3% #3625.50
12 Beliavsky, Alexander G2678480.2% #3936.95
13 Ehlvest, Jaan2678490.2% #4028.13
14 Khalifman, Alexander2668480.1% #4724.87
15 Andersson, Ulf2667480.1% #4839.43
16 Lputian, Smbat G2665500.1% #5132.79
17 Dolmatov, Sergey V2659490.1% #5531.78
18 Dreev, Alexey2658490.1% #5621.86
19 Hübner, Robert2654490.1% #6042.07
20 Dautov, Rustem2653520.1% #6325.01
21 Gavrikov, Victor N2651500.1% #6433.34
22 Speelman, Jonathan S264848 #6434.16
23 Vyzmanavin, Alexey2645500.1% #6930.91
24 Polugaevsky, Lev A264549 #6956.03
25 Nikolic, Predrag264548 #6930.22
26 Jussupow, Artur M264349 #7130.80
27 Chernin, Alexander M264348 #7030.73
28 Balashov, Yury S264149 #7341.72
29 Nunn, John D M263649 #7735.60
30 Seirawan, Yasser263648 #7730.68
31 Portisch, Lajos263448 #8053.65
32 Yurtaev, Leonid263453 #8431.58
33 Epishin, Vladimir263450 #8125.38
34 Tal, Mikhail263449 #8154.06
35 Anand, Viswanathan263149 #8420.96
36 Vaganian, Rafael A263048 #8439.12
37 Dzindzichashvili, Roman Y262951 #8846.57
38 Vladimirov, Evgeny Y262850 #8833.86
39 Kamsky, Gata262750 #8916.49
40 Ribli, Zoltán262649 #8939.23
41 Shirov, Alexei262450 #9318.40
42 Sax, Gyula262349 #9239.45
43 Razuvaev, Yury S262050 #9645.14
44 Agdestein, Simen262051 #9923.54
45 Tiviakov, Sergei261956 #10217.79
46 Eingorn, Viacheslav S261949 #9834.01
47 Georgiev, Kiril261949 #9825.01
48 Miles, Anthony J261748 #10035.60
49 Azmaiparashvili, Zurab A261649 #10130.70
50 Ljubojevic, Ljubomir261649 #10240.08
51 Romanishin, Oleg M261649 #10138.89
52 Sveshnikov, Evgeny E261152 #11040.80
53 Rozentalis, Eduardas261051 #11027.51
54 Kramnik, Vladimir261060 #11615.43
55 Hjartarson, Jóhann260948 #10927.81
56 Sokolov, Andrey Y260949 #10827.69
57 Dorfman, Iosif D260850 #11138.58
58 Dvoiris, Semen I260351 #11732.08
59 Gulko, Boris F260148 #11943.81
60 Ftácnik, Lubomír260048 #12033.08
61 Oll, Lembit259950 #12124.60
62 Glek, Igor V259953 #12429.06
63 Adams, Michael259948 #12219.04
64 Ionov, Sergey259764 #13528.90
65 Aseev, Konstantin N259751 #12530.11
66 Chandler, Murray G259548 #12530.65
67 Malaniuk, Vladimir P259449 #12633.36
68 deFirmian, Nicholas E259448 #12633.34
69 Yermolinsky, Alex V259457 #13232.63
70 Dokhoian, Yury259350 #12926.09
71 Todorcevic, Miodrag259350 #12950.05
72 Goldin, Alexander259250 #12925.76
73 Kruppa, Yuri259256 #13426.44
74 Sturua, Zurab259166 #14331.48
75 Neverov, Valery259052 #13326.44
76 Timoshchenko, Gennady258951 #13441.59
77 Yakovich, Yuri258852 #13527.99
78 Makarichev, Sergey Y258852 #13537.04
79 Pigusov, Evgeny258752 #13629.66
80 Kuzmin, Gennady P258752 #13744.86
81 Pintér, József258654 #13937.06
82 Christiansen, Larry M258550 #13734.43
83 Kurajica, Bojan258460 #14543.04
84 Larsen, Bent258450 #13855.74
85 Olafsson, Helgi258350 #13934.29
86 Hansen, Curt258350 #14026.20
87 Psakhis, Lev B258348 #13932.00
88 Smagin, Sergey258148 #14032.23
89 Kharitonov, Andrey Y258152 #14331.65
90 Tukmakov, Vladimir B258049 #14244.71
91 Smirin, Ilia257550 #14722.86
92 Novikov, Igor A257550 #14828.52
93 Fedorowicz, John P257549 #14832.18
94 Sokolov, Ivan257450 #14822.46
95 Akopian, Vladimir257450 #14918.97
96 Kengis, Edvins257453 #15131.63
97 Cherepkov, Alexander V257373 #16570.08
98 Kovalev, Andrei257356 #15529.06
99 Averkin, Orest N257273 #16646.76
100 Krasenkow, Michal257250 #15227.04
101 Barua, Dibyendu257157 24.09
102 Lerner, Konstantin Z257150 40.76
103 Smyslov, Vassily V257150 69.68
104 Shneider, Aleksandr257054 28.52
105 Benjamin, Joel L257048 26.72
106 Kalinitschew, Sergey257065 34.82
107 Alburt, Lev O257052 45.27
108 Xie Jun256967 20.08
109 Dlugy, Maxim256849 24.84
110 Ulibin, Mikhail256750 19.50
111 Naumkin, Igor256751 25.30
112 Lobron, Eric256748 30.56
113 Pétursson, Margeir256648 30.79
114 van der Wiel, John T H256547 31.31
115 Vaulin, Alexander256464 33.70
116 Spassky, Boris V256450 53.83
117 Morovic Fernández, Iván E256453 27.68
118 Hulak, Krunoslav256351 39.51
119 Giorgadze, Giorgi256355 26.14
120 Kuzmin, Alexey256255 27.73
121 Suba, Mihai256251 43.50
122 Khenkin, Igor256052 22.69
123 Smejkal, Jan256050 44.69
124 Gorelov, Sergey G256067 33.28
125 Wahls, Matthias255949 22.84
126 Arnason, Jon L255950 30.05
127 Minasian, Artashes255855 23.86
128 Panchenko, Alexander N255852 37.15
129 Chekhov, Valery A255850 35.01
130 Nogueiras, Jesus255850 31.37
131 Quinteros, Miguel A255757 42.92
132 Rashkovsky, Nukhim N255651 44.62
133 Tseshkovsky, Vitaly V255650 46.18
134 Kožul, Zdenko255649 24.52
135 Kaidanov, Gregory S255551 31.13
136 Geller, Efim P255551 65.74
137 Mestel, A Jonathan255555 33.71
138 Vasiukov, Evgeny A255551 57.73
139 Hort, Vlastimil255549 46.88
140 Huzman, Alexander255455 28.64
141 Bikhovsky, Avigdor I255456 35.73
142 Magerramov, Elmar S255353 32.64
143 Arkhipov, Sergey255256 36.44
144 Komarov, Dimitri255264 21.99
145 Zhuravliov, Valerij255263 51.96
146 Lanka, Zigurds255255 30.52
147 Torre, Eugenio255252 39.07
148 Taimanov, Mark E255157 64.81
149 Kavalek, Lubomir255164 47.31
150 Fominyh, Alexander255157 31.46
151 Donchev, Dimitar I255159 32.36
152 Damljanovic, Branko255149 29.45
153 Shabanov, Yury F255158 53.05
154 King, Daniel J255148 27.26
155 Soppe, Guillermo255058 30.20
156 Knaak, Rainer F254950 37.70
157 Baburin, Alexander254963 23.78
158 Janjgava, Lasha254953 20.57
159 Uhlmann, Wolfgang254851 55.67
160 Ubilava, Elizbar E254853 40.26
161 Kholmov, Ratmir D254851 65.55
162 Ivanov, Alexander V254751 34.58
163 Sosonko, Gennadi254754 47.53
164 Cvitan, Ognjen254750 29.14
165 Sorokin, Maxim254754 22.86
166 Greenfeld, Alon254653 26.62
167 Vaisser, Anatoli254551 41.73
168 Ruban, Vadim254552 26.46
169 Ziatdinov, Raset254560 31.92
170 Hodgson, Julian M254548 27.35
171 Mokrý, Karel254552 31.81
172 Malisauskas, Vidmantas254557 27.32
173 Spraggett, Kevin B254449 36.05
174 Kudrin, Sergey254451 31.23
175 Adorján, András254450 40.66
176 Popovic, Petar254450 31.79
177 Milos, Gilberto254452 27.08
178 Najdorf, Miguel254471 80.62
179 Cebalo, Mišo254351 45.82
180 Mikhalchishin, Adrian B254251 36.03
181 Rohde, Michael A254253 31.26
182 Rogers, Ian254249 30.43
183 Kveinys, Aloyzas254156 28.39
184 Zapata, Alonso254149 32.27
185 Lalic, Bogdan254150 26.73
186 Brodsky, Michail254161 21.68
187 Sherbakov, Ruslan254058 21.21
188 Orlov, Georgi254056
189 Duer, Arne254064 31.39
190 Kindermann, Stefan254048 30.92
191 Lautier, Joel253948 17.63
192 Zagrebelny, Sergey253963
193 Mnatsakanian, Eduard A253974 51.98
194 Ivanovic, Božidar253850 44.27
195 Rodriguez, Amador253851 34.23
196 Velimirovic, Dragoljub253851 48.55
197 Kochiev, Alexander253853 34.68
198 Browne, Walter S253850 41.89
199 Ye Rongguang253755 27.16
200 Kozlov, V.253769
201 Bagirov, Vladimir K253651 54.29
202 Kuporosov, Viktor253659 29.18
203 Bönsch, Uwe253550 32.12
204 Arbakov, Valentin253457 38.84
205 Petrienko, Vladimir253364 35.72
206 Zezulkin, Jurij253368 19.29
207 Illescas Cordoba, Miguel253249 24.98
208 Magomedov, Magaram253257 24.53
209 Hellers, Ferdinand253249 21.84
210 Piket, Jeroen253248 21.84
211 Veingold, Aleksander253164 37.14
212 Rechlis, Gad253053 23.82
213 Zlotnik, Boris A253062 44.12
214 Chiburdanidze, Maia G252950 29.87
215 Machulsky, Anatoly D252959 34.18
216 Frias, Victor J252955 34.80
217 Anastasian, Ashot252854 26.37
218 Meister, Yakov252857 35.22
219 Panchenko, Alexandar G252765 29.64
220 Ye Jiangchuan252758 30.03
221 Darga, Klaus V252671 56.77
222 Gheorghiu, Florin252551 46.65
223 Kovacevic, Vladimir252551 48.68
224 Stohl, Igor252449 26.18
225 Anikaev, Yury252465 42.42
226 Ikonnikov, Vyacheslav252358 24.71
227 Hansen, Lars Bo252249 22.18
228 Savon, Vladimir A252253 50.18
229 Rachels, Stuart252257 21.18
230 Gofshtein, Leonid D252272 37.61
231 Tischbierek, Raj252151 28.18
232 Belov, Igor252058
233 Wilder, Michael252054 28.20
234 Pfleger, Helmut251958 47.32
235 Chudinovskih, Alexander251970 23.72
236 Horvath, Jozsef251950 26.30
237 Tseitlin, Mark D251965 47.19
238 Shabalov, Alexander251852 23.22
239 Dizdar, Goran251851 31.98
240 Gufeld, Eduard E251857 54.70
241 Watson, William N251750 28.62
242 Petrosian, Arshak B251751 36.95
243 Kupreichik, Viktor D251651 41.41
244 Kishnev, Sergey251663 34.08
245 Frolov, Artur251657 20.33
246 Barbero, Gerardo F251651 29.27
247 Panno, Oscar R251652 55.70
248 Wojtkiewicz, Aleksander251648 27.87
249 Yuneev, Alexey251657
250 Granda Zuńiga, Julio E251551 23.76
251 Cámpora, Daniel H251550 33.42
252 Moskalenko, Viktor251550 29.98
253 Liberzon, Vladimir M251461 53.69
254 Wolff, Patrick G251450 22.79
255 Khmelnitsky, Igor N251464 22.27
256 Gonzalez, JA.251471
257 Csom, István251450 50.49
258 Simic, Radoslav251455 42.47
259 Bass, Leonid251457 33.50
260 Lau, Ralf251350 31.11
261 Serper, Grigory251353 21.21
262 Georgadze, Tamaz V251364 43.06
263 Polgar, Zsuzsa251349 21.61
264 Gaprindashvili, Nona251255 49.57
265 Sher, Miron N251253 38.42
266 Palac, Mladen251253 19.78
267 Tseitlin, Mikhail S251152 43.45
268 Vitolinš, Alvis251162 44.46
269 Karlsson, Lars251052 35.38
270 Henley, Ron W251068 33.98
271 London, Dimitri250973 28.02
272 Gipslis, Aivars250963 53.81
273 Mochalov, Evgeny V250970 39.09
274 Ivanov, Igor V250953 43.89
275 Hertneck, Gerald250952 27.20
276 Gurevich, Vladimir250860 31.32
277 Savchenko, Stanislav250857 23.86
278 Kiselev, Sergey250854 29.21
279 Kharlov, Andrei250765 22.03
280 Karpman, Vadim250755 25.55
281 Guseinov, Aidyn250668 38.91
282 Vorotnikov, Vladislav V250665 43.29
283 Pekarek, Ales250555 28.95
284 Tolnai, Tibor250549 26.19
285 Filipenko, Alexander V250569 41.74
286 Bischoff, Klaus250549 29.47
287 Gruenberg, Hans Ulrich250550 34.89
288 Xu Jun250458 28.20
289 Hickl, Joerg250450 25.62
290 Faragó, Iván250450 44.66
291 Matulovic, Milan250357 55.47
292 Lutz, Christopher250351 19.77
293 Govedarica, Radovan250271 42.79
294 Marin, Mihail250253 25.61
295 Rodriguez Vargas, Orestes250155 47.40
296 Lukin, Andrei M250055 42.26
297 Timoshenko, Georgy250051 24.50
298 Yrjola, Jouni249952 31.10
299 Ghinda, Mihail Viorel249957 41.35
300 Zhidkov, Valery S249860 51.24
301 Galliamova, Alisa249857 18.87
302 Kotronias, Vasilios249850 26.26
303 Franco Ocampos, Zenon249752 34.55
304 Hebden, Mark249750 32.79
305 Graf, Alexander249761 28.26
306 Kosten, Anthony C249649 32.35
307 Palatnik, Semen A249655 40.68
308 García Gonzáles, Guillermo249654 36.97
309 Meshkov, Yuri A249669 40.87
310 Djuric, Stefan249551 35.34
311 Marjanovic, Slavoljub249452 35.90
312 Rausis, Igors249456 29.65
313 Bronstein, David I249454 66.78
314 Cramling, Pia249450 27.60
315 Petkevich, Jusefs249465 49.94
316 Loginov, Valery A249456 34.96
317 Groszpeter, Attila249349 30.47
318 Plaskett, Jim249253 30.70
319 Gligoric, Svetozar249253 67.83
320 Castro Rojas, Oscar Humberto249260 37.56
321 Unzicker, Wolfgang249155 65.43
322 Meduna, Eduard249151 40.22
323 Vukic, Milan249155 47.28
324 Mainka, Romuald249151 27.54
325 Klinger, Josef249150 23.48
326 Kallai, Gabor249154 31.77
327 Foisor, Ovidiu249060 31.65
328 Brunner, Lucas249048 23.50
329 Gleizerov, Evgeny249062 27.69
330 Inkiov, Ventzislav248950 34.53
331 Sellos, Didier248965 33.78
332 Ivkov, Borislav248953 57.05
333 Moroz, Alexander248858 29.87
334 Barlov, Dragan248850 33.83
335 Zaichik, Gennady L248852 33.80
336 Abramovic, Boško248851 39.79
337 Nikolac, Juraj248764 58.61
338 Ernst, Thomas248550 30.29
339 Lukacs, Peter248550 40.39
340 Makarov, Marat248556 27.56
341 Kantsler, Boris248458 28.62
342 Vera, Reynaldo248452 29.90
343 Varavin, Viktor248465 23.52
344 Strikovic, Aleksa248452 29.55
345 Andrianov, Nikolai248462 28.94
346 Renet, Olivier248350 25.94
347 Schoenthier, Frank248368 32.03
348 Georgiev, Krum248351 32.52
349 Perovic, Dragan248375
350 Lima, Darcy248363 28.52
351 Van der Sterren, Paul248249 34.70
352 Sahovic, Dragutin248262 50.31
353 Vogt, Lothar H248150 38.87
354 Adianto, Utut248162 25.70
355 Hazai, Laszlo248157 37.46
356 Zilberstein, Valery I248172 47.63
357 Sunye Neto, Jaime248051 33.58
358 Cabrilo, Goran248050 32.41
359 Basin, Leonid248060 33.02
360 Rubinetti, Jorge A247960 45.66
361 Mukhametov, Eldar247961 21.52
362 Ionescu, Constantin247954 32.22
363 Popchev, Milko247956 26.05
364 Lein, Anatoly247853 59.67
365 Wang Zili247860 22.46
366 Murey, Yakov247852 49.33
367 Piskov, Yury247854 29.13
368 Schlosser, Philipp247851 22.28
369 Kremenetsky, Anatoly M247871 51.88
370 Antunes, Antonio247752 28.82
371 Ornstein, Axel247766 38.60
372 Godena, Michele247760 23.42
373 Saltaev, Mihail247766 28.03
374 Reeh, Oliver247752 26.86
375 Ree, Hans247653 46.21
376 Arencibia, Walter247551 23.36
377 Dizdarevic, Emir247552 32.66
378 Schussler, Harry247553 33.43
379 Gruenfeld, Yehuda247553 34.76
380 Thorsteins, Karl247553 26.13
381 Rivas Pastor, Manuel247457 30.38
382 Ardiansyah, Haji247464 38.98
383 Rytshagov, Mikhail247470 23.05
384 Brenninkmeijer, Joris247451 21.21
385 Janovsky, Sergey247461 30.79
386 Kuczynski, Robert247350 24.62
387 Ekstroem, Roland247358 34.52
388 Vehi Bach, Victor Manuel247360
389 Cid, Marino Alejandro247266 32.47
390 Ninov, Kiril247254 22.14
391 Haba, Petr247251 25.90
392 Sideif Sade, Fikret I247267 38.91
393 Mednis, Edmar J247152 53.69
394 Schmidt, Wlodzimierz247149 47.64
395 Cifuentes Parada, Roberto247155 32.94
396 Dimitrov, Vladimir247155 22.63
397 Anic, Darko247158 33.58
398 Nemet, Ivan247155 47.63
399 Ermenkov, Evgenij247151 41.17
400 Reshevsky, Samuel H247162 79.01
401 Drasko, Milan247052 27.98
402 Gallagher, Joseph G247049 26.57
403 Kolev, Atanas247055 23.37
404 Espig, Lutz247053 41.90
405 Norwood, David247053 22.16
406 Mirkovic, Slobodan246967 32.34
407 Mortensen, Erling246951 35.65
408 Tunik, Gennady246960 37.51
409 Reyes, Juan246962 27.59
410 Moiseev, Viktor246873 31.55
411 Spasov, Vasil246852 19.79
412 Comas Fabrego, Luis246859 19.44
413 Kozlov, Vladimir N246761 40.50
414 Lin Ta246757 27.83
415 Dzuban, Oleg I246774
416 Ostenstad, Berge246751 26.20
417 Knezevic, Milorad246756 54.08
418 Kosic, Dragan246656 20.79
419 Rukavina, Josip246663 48.00
420 Tempone, Marcelo246657 28.23
421 Ledger, Andrew246662 21.52
422 Davies, Nigel R246550 30.33
423 Franic, Milan246570 26.43
424 Szekely, Peter246554 35.81
425 Fishbein, Alexander246553 22.56
426 Vonthron, Horst246563 27.89
427 Novik, Maxim246467 26.96
428 Polgar, Judit246451 14.35
429 Legky, Nikolay A246456 35.63
430 Root, Douglas246468 27.80
431 Alterman, Boris246362 20.57
432 Kouatly, Bachar246354 32.74
433 Titov, German246362 27.59
434 Tringov, Georgy P246358 53.73
435 Womacka, Mathias246360 24.43
436 Kraidman, Yair246364 58.08
437 Hresc, Vladimir246266 39.03
438 Blatny, Pavel246250 22.44
439 Gomez Baillo, Jorge H246255 31.61
440 Murshed, Niaz246255 24.55
441 Rajkovic, Dusan246252 48.45
442 Winants, Luc246253 27.91
443 Howell, James C246152 23.54
444 Nikolenko, Oleg246163 31.45
445 Badea, Bela246163 21.77
446 Klundt, Klaus246164 48.92
447 Fokin, Sergey246166 35.13
448 Okhotnik, Vladimir246159 40.76
449 Byrne, Robert E246157 62.61
450 Blagojevic, Dragisa246058 24.91
451 Khasin, Alexander246063 39.59
452 Schmittdiel, Eckhard246049 30.55
453 Vilela, Jose Luis245963 37.70
454 Maki, Veijo245959 31.97
455 Mohr, Stefan245950 23.11
456 Lagunow, Alexander245971 23.38
457 Stanojevic, Branko245872 47.91
458 Flear, Glenn C245849 31.80
459 Fiorito, Fabian245857 21.08
460 Levitt, Jonathan245750 27.49
461 Shmuter, Leonid245767 21.57
462 Fernandez Garcia, Jose Luis245754 36.57
463 Schneider, Lars Ake245757
464 Vallifuoco, Giacomo245775 33.57
465 Stangl, Markus245650 21.59
466 Brooks, Michael A245657 29.62
467 McKay, Roderick M245575 38.80
468 Kirov Ivanov, Nino245552 45.22
469 Efimov, Igor245561 30.20
470 Antonio, Rogelio Jr245561 28.78
471 Arduman, Can245464
472 Ioseliani, Nana245456 28.80
473 Atalik, Suat245470 26.14
474 Ambroz, Jan245462 36.45
475 Wedberg, Tom245350 37.01
476 Temirbaev, Serik245365
477 Romero Holmes, Alfonso245353 25.51
478 Hector, Jonny245349 26.80
479 Prandstetter, Eduard245254 41.95
480 Buecker, Peter245165
481 Hausner, Ivan245152 38.62
482 Wirthensohn, Heinz245154 39.57
483 Tabatadze, Tamaz245171 22.67
484 Negulescu, Adrian245169 29.47
485 Jansa, Vlastimil245151 48.01
486 Bruk, Ofer245057 22.88
487 Gurgenidze, Bukhuti I245062 57.05
488 Rakic, Tomislav245067 56.05
489 Nijboer, Friso245051 25.51
490 Sadler, Matthew245060 16.54
491 Miralles, Gilles244949 24.81
492 Hecht, Hans-Joachim244972 51.84
493 Luther, Thomas244851 21.07
494 Sznapik, Aleksander244850 39.80
495 Magem Badals, Jordi244854 23.27
496 Avshalumov, Alex244856 26.74
497 Orso, Miklos244862 34.48
498 Skembris, Spyridon244850 32.77
499 Edelman, Daniel244860 21.76
500 Kuijf, Marinus244750 30.80

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