< December 31, 1990     Back to date list    February 28, 1991 >

Top 10 active players as of January 31, 1991


Top 500 active players as of January 31, 1991

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28424967.1% #227.80
2 Karpov, Anatoly E27974821.8% #339.69
3 Ivanchuk, Vassily2755495.7% #821.87
4 Gelfand, Boris2727481.9% #1522.60
5 Salov, Valery B2700500.6% #2826.68
6 Bareev, Evgeny2695490.5% #3024.19
7 Beliavsky, Alexander G2686480.2% #3437.12
8 Yudasin, Leonid G2685490.2% #3631.48
9 Gurevich, Mikhail N2683490.2% #3731.94
10 Short, Nigel D2679470.2% #4025.66
11 Timman, Jan H2678480.2% #4139.13
12 Lputian, Smbat G2672490.1% #4632.96
13 Korchnoi, Viktor L2669470.1% #4759.86
14 Khalifman, Alexander2666480.1% #5125.04
15 Chernin, Alexander M266148 #5430.90
16 Polugaevsky, Lev A2657490.1% #5956.20
17 Nunn, John D M2657490.1% #5935.77
18 Epishin, Vladimir2656500.1% #6125.55
19 Dolmatov, Sergey V2655490.1% #6131.94
20 Dautov, Rustem2655530.1% #6425.17
21 Ehlvest, Jaan265348 #6328.30
22 Jussupow, Artur M265349 #6330.96
23 Vyzmanavin, Alexey265151 #6731.08
24 Seirawan, Yasser264947 #6530.85
25 Anand, Viswanathan264950 #6721.14
26 Gavrikov, Victor N264950 #6733.51
27 Andersson, Ulf264748 #6839.59
28 Hübner, Robert264748 #6842.23
29 Shirov, Alexei264650 #7018.57
30 Speelman, Jonathan S264448 #7134.33
31 Vaganian, Rafael A264048 #7539.29
32 Balashov, Yury S263949 #7841.88
33 Nikolic, Predrag263748 #7830.39
34 Kramnik, Vladimir263357 #9015.60
35 Eingorn, Viacheslav S263149 #8734.18
36 Ljubojevic, Ljubomir263049 #8740.24
37 Dorfman, Iosif D262850 #9038.75
38 Dreev, Alexey262749 #9022.03
39 Adams, Michael262748 #9019.20
40 Agdestein, Simen262751 #9323.71
41 Vladimirov, Evgeny Y262550 #9434.03
42 Dzindzichashvili, Roman Y262451 #9646.74
43 Romanishin, Oleg M262449 #9439.06
44 Sax, Gyula262448 #9439.62
45 Azmaiparashvili, Zurab A262349 #9530.87
46 Panchenko, Alexandar G2620650.1% #11129.81
47 Ribli, Zoltán261949 #9939.40
48 Tal, Mikhail261849 #10254.23
49 Yurtaev, Leonid261755 #10731.75
50 Portisch, Lajos261749 #10253.82
51 Kamsky, Gata261750 #10416.66
52 Goldin, Alexander261752 #10525.92
53 Pigusov, Evgeny261253 #11129.83
54 Razuvaev, Yury S261250 #10945.31
55 Oll, Lembit261249 #10924.77
56 Hjartarson, Jóhann261148 #10927.97
57 Chandler, Murray G261048 #11030.82
58 Sturua, Zurab2608650.1% #12531.65
59 Sveshnikov, Evgeny E260852 #11640.96
60 Vaulin, Alexander260759 #12133.87
61 Kruppa, Yuri260757 #12126.61
62 Sokolov, Andrey Y260449 #11727.86
63 Gulko, Boris F260448 #11743.97
64 Miles, Anthony J260348 #11835.77
65 deFirmian, Nicholas E260248 #12033.51
66 Aseev, Konstantin N260251 #12330.28
67 Georgiev, Kiril260148 #12125.17
68 Hansen, Curt260049 #12226.37
69 Tiviakov, Sergei259956 #12917.96
70 Rozentalis, Eduardas259951 #12427.68
71 Christiansen, Larry M259850 #12534.59
72 Yermolinsky, Alex V259858 #13032.80
73 Pintér, József259453 #13237.23
74 Neverov, Valery259252 #13326.61
75 Kengis, Edvins259252 #13431.80
76 Dvoiris, Semen I259251 #13332.24
77 Psakhis, Lev B259148 #13132.17
78 Akopian, Vladimir259151 #13319.15
79 Lerner, Konstantin Z259050 #13540.92
80 Ulibin, Mikhail259052 #13519.67
81 Yakovich, Yuri259052 #13628.17
82 Ftácnik, Lubomír258948 #13433.25
83 Kovalev, Andrei258853 #13829.23
84 Kuzmin, Gennady P258752 #13945.03
85 Kurajica, Bojan258657 #14243.21
86 Larsen, Bent258650 #13855.91
87 Spassky, Boris V258650 #13854.00
88 Smagin, Sergey258649 #13732.40
89 Kuzmin, Alexey258556 #14427.90
90 Smirin, Ilia258450 #14123.03
91 Makarichev, Sergey Y258353 #14337.20
92 Krasenkow, Michal258250 #14227.21
93 Benjamin, Joel L258249 #14226.89
94 Novikov, Igor A258249 #14228.69
95 Pétursson, Margeir258148 #14230.95
96 Kharitonov, Andrey Y258152 #14631.82
97 Timoshchenko, Gennady258152 #14441.76
98 Ruban, Vadim258052 #14626.63
99 Glek, Igor V257853 #14829.23
100 Kožul, Zdenko257849 #14624.69
101 Dokhoian, Yury257851 26.26
102 Giorgadze, Giorgi257755 26.31
103 Alburt, Lev O257652 45.44
104 Ionov, Sergey257659 29.06
105 Suba, Mihai257550 43.66
106 Tukmakov, Vladimir B257548 44.88
107 Barua, Dibyendu257555 24.26
108 Naumkin, Igor257452 25.47
109 Gorelov, Sergey G257367 33.45
110 Mestel, A Jonathan257255 33.88
111 Geller, Efim P257151 65.91
112 Vaisser, Anatoli256952 41.90
113 Dlugy, Maxim256950 25.01
114 Lobron, Eric256849 30.73
115 Hort, Vlastimil256849 47.05
116 Vasiukov, Evgeny A256751 57.90
117 Wahls, Matthias256649 23.01
118 Smyslov, Vassily V256650 69.85
119 Sokolov, Ivan256549 22.63
120 Shneider, Aleksandr256453 28.69
121 Olafsson, Helgi256349 34.46
122 Shabanov, Yury F256260 53.22
123 Graf, Alexander256260 28.43
124 Morovic Fernández, Iván E256253 27.85
125 Baburin, Alexander256262 23.94
126 Malaniuk, Vladimir P255949 33.53
127 Torre, Eugenio255952 39.24
128 van der Wiel, John T H255948 31.48
129 Taimanov, Mark E255958 64.98
130 Huzman, Alexander255856 28.81
131 Kudrin, Sergey255852 31.40
132 Hodgson, Julian M255749 27.52
133 Kveinys, Aloyzas255754 28.56
134 Nogueiras, Jesus255749 31.54
135 Damljanovic, Branko255749 29.62
136 Machulsky, Anatoly D255658 34.35
137 Kaidanov, Gregory S255652 31.30
138 Smejkal, Jan255550 44.86
139 Mokrý, Karel255451 31.98
140 Sorokin, Maxim255454 23.02
141 Podgaets, Mikhail Y255474 43.52
142 Piket, Jeroen255448 22.01
143 Brodsky, Michail255457 21.84
144 Hulak, Krunoslav255351 39.68
145 Orlov, Georgi255259
146 Malisauskas, Vidmantas255253 27.49
147 Lalic, Bogdan255251 26.90
148 Adorján, András255250 40.83
149 Rogers, Ian255149 30.60
150 Frolov, Artur255157 20.50
151 Ubilava, Elizbar E255152 40.43
152 Rashkovsky, Nukhim N255051 44.79
153 Fedorowicz, John P255049 32.34
154 Gleizerov, Evgeny254957 27.86
155 Illescas Cordoba, Miguel254949 25.16
156 Xie Jun254967 20.25
157 Averkin, Orest N254965 46.93
158 Khenkin, Igor254953 22.86
159 Kavalek, Lubomir254865 47.48
160 Arnason, Jon L254750 30.22
161 Rohde, Michael A254754 31.43
162 Lanka, Zigurds254754 30.69
163 Knaak, Rainer F254650 37.87
164 Browne, Walter S254651 42.06
165 Ziatdinov, Raset254661 32.09
166 Mikhalchishin, Adrian B254651 36.20
167 Kalinitschew, Sergey254665 34.99
168 Magerramov, Elmar S254653 32.81
169 Ye Jiangchuan254557 30.20
170 Sosonko, Gennadi254454 47.70
171 Chekhov, Valery A254451 35.18
172 Zapata, Alonso254449 32.44
173 Granda Zuńiga, Julio E254451 23.93
174 Kholmov, Ratmir D254351 65.72
175 Lautier, Joel254248 17.80
176 Kharlov, Andrei254257 22.20
177 Arkhipov, Sergey254254 36.61
178 Popovic, Petar254250 31.96
179 Cvitan, Ognjen254250 29.31
180 Minasian, Artashes254153 24.03
181 Hellers, Ferdinand254149 22.01
182 Kindermann, Stefan254148 31.09
183 Velimirovic, Dragoljub254151 48.72
184 Tseshkovsky, Vitaly V254051 46.35
185 Panchenko, Alexander N254053 37.32
186 Didishko, Vereslav254067 41.81
187 Petrienko, Vladimir253965 35.89
188 Zagrebelny, Sergey253966
189 Spraggett, Kevin B253949 36.22
190 Xu Jun253856 28.37
191 Ivanov, Alexander V253851 34.75
192 Fominyh, Alexander253857 31.63
193 Kuporosov, Viktor253760 29.35
194 Lutz, Christopher253751 19.93
195 King, Daniel J253748 27.42
196 Bologan, Viktor253769 19.13
197 Kupreichik, Viktor D253751 41.58
198 Stohl, Igor253749 26.34
199 Zhuravliov, Valerij253667 52.14
200 Georgadze, Tamaz V253561 43.23
201 Uhlmann, Wolfgang253551 55.84
202 Sherbakov, Ruslan253453 21.38
203 Karpman, Vadim253459 25.72
204 Kochiev, Alexander253453 34.85
205 Janjgava, Lasha253454 20.74
206 Kovacevic, Vladimir253451 48.85
207 Ivanovic, Božidar253350 44.44
208 Shabalov, Alexander253353 23.38
209 Serper, Grigory253253 21.38
210 Polgar, Zsuzsa253249 21.78
211 Novik, Maxim253168 27.14
212 Ikonnikov, Vyacheslav253159 24.88
213 Greenfeld, Alon253154 26.79
214 Guseinov, Aidyn253061 39.08
215 Khmelnitsky, Igor N253068 22.44
216 Chudinovskih, Alexander253071 23.89
217 Bönsch, Uwe253049 32.29
218 Arbakov, Valentin252859 39.01
219 Donchev, Dimitar I252857 32.53
220 Sher, Miron N252752 38.59
221 Rachels, Stuart252757 21.35
222 Gruenberg, Hans Ulrich252651 35.06
223 Wilder, Michael252555 28.37
224 Hertneck, Gerald252552 27.37
225 Bikhovsky, Avigdor I252558 35.90
226 Milos, Gilberto252552 27.25
227 Quinteros, Miguel A252456 43.09
228 Bagirov, Vladimir K252452 54.46
229 Sakaev, Konstantin252461 16.80
230 Darga, Klaus V252370 56.93
231 Savchenko, Stanislav252358 24.03
232 Tseitlin, Mark D252267 47.36
233 Palac, Mladen252156 19.95
234 Najdorf, Miguel252167 80.79
235 Anikaev, Yury252166 42.59
236 Bischoff, Klaus252149 29.64
237 Wojtkiewicz, Aleksander252148 28.04
238 Cámpora, Daniel H252050 33.59
239 Lukin, Andrei M252055 42.42
240 Wang Zili252059 22.63
241 Vitolinš, Alvis252063 44.63
242 Tischbierek, Raj252052 28.35
243 Chiburdanidze, Maia G251951 30.04
244 Gofshtein, Leonid D251973 37.78
245 Tseitlin, Mikhail S251952 43.62
246 Pfleger, Helmut251858 47.48
247 Varavin, Viktor251759 23.69
248 Todorcevic, Miodrag251649 50.22
249 Hansen, Lars Bo251649 22.35
250 Duer, Arne251563 31.56
251 Matulovic, Milan251558 55.64
252 Tunik, Gennady251556 37.68
253 Kosic, Dragan251558 20.95
254 Belov, Igor251557
255 Liberzon, Vladimir M251565 53.86
256 Timoshenko, Georgy251452 24.66
257 Ye Rongguang251453 27.33
258 Wolff, Patrick G251451 22.95
259 Plaskett, Jim251354 30.87
260 London, Dimitri251273 28.19
261 Meister, Yakov251261 35.39
262 Henley, Ron W251268 34.15
263 Vukic, Milan251154 47.45
264 Gufeld, Eduard E251160 54.87
265 Panno, Oscar R251052 55.87
266 Petkevich, Jusefs251061 50.12
267 Kotronias, Vasilios250950 26.43
268 Lau, Ralf250951 31.28
269 Makarov, Marat250958 27.73
270 Faragó, Iván250950 44.83
271 Doroshkievich, Vladimir K250863 53.09
272 Cramling, Pia250850 27.77
273 Cifuentes Parada, Roberto250853 33.11
274 Zhidkov, Valery S250860 51.41
275 Simic, Radoslav250856 42.64
276 Moskalenko, Viktor250751 30.16
277 Gheorghiu, Florin250751 46.82
278 Spasov, Vasil250652 19.95
279 Gipslis, Aivars250661 53.97
280 Rodriguez Vargas, Orestes250655 47.57
281 Djuric, Stefan250652 35.51
282 Veingold, Aleksander250659 37.31
283 Nikolenko, Oleg250564 31.62
284 Magomedov, Magaram250557 24.70
285 Cebalo, Mišo250551 45.98
286 Dizdar, Goran250551 32.16
287 Savon, Vladimir A250452 50.35
288 Rodriguez, Amador250450 34.40
289 Basin, Leonid250462 33.19
290 Rausis, Igors250455 29.81
291 Barlov, Dragan250451 34.00
292 Karlsson, Lars250352 35.55
293 Dimitrov, Vladimir250355 22.80
294 Horvath, Jozsef250350 26.47
295 Yrjola, Jouni250352 31.27
296 Kosten, Anthony C250349 32.52
297 Rechlis, Gad250354 23.98
298 Kishnev, Sergey250268 34.25
299 Palatnik, Semen A250255 40.85
300 Ivanov, Igor V250153 44.06
301 Rivas Pastor, Manuel250156 30.55
302 Bass, Leonid250157 33.67
303 Ernst, Thomas250151 30.45
304 Mochalov, Evgeny V250065 39.26
305 Unzicker, Wolfgang250054 65.60
306 García Gonzáles, Guillermo250055 37.14
307 Sellos, Didier249965 33.94
308 Bronstein, David I249854 66.94
309 Loginov, Valery A249853 35.13
310 Gurevich, Vladimir249761 31.49
311 Kallai, Gabor249755 31.94
312 Lima, Darcy249761 28.69
313 Beim, Valery249762 40.87
314 Anastasian, Ashot249754 26.54
315 Kurtenkov, Atanas249668 27.49
316 Yuneev, Alexey249658
317 Georgiev, Krum249652 32.69
318 Zakharov, Alexander V249669 47.31
319 Renet, Olivier249650 26.11
320 Titov, German249659 27.76
321 Kuczynski, Robert249550 24.79
322 Van der Sterren, Paul249449 34.87
323 Watson, William N249449 28.79
324 Shipov, Sergei249474 24.79
325 Zaichik, Gennady L249353 33.96
326 Brunner, Lucas249348 23.67
327 Marin, Mihail249352 25.78
328 Hickl, Joerg249350 25.79
329 Rubinetti, Jorge A249260 45.83
330 Polgar, Judit249251 14.52
331 Ivkov, Borislav249253 57.22
332 Kiselev, Sergey249153 29.38
333 Inkiov, Ventzislav249150 34.70
334 Csom, István249150 50.66
335 Haba, Petr249152 26.07
336 Vera, Reynaldo249152 30.06
337 Bukic, Enver248972 53.16
338 Cabrilo, Goran248950 32.58
339 Petrosian, Arshak B248951 37.12
340 Tabatadze, Tamaz248867 22.84
341 Popchev, Milko248856 26.22
342 Gallagher, Joseph G248849 26.74
343 Gruenfeld, Yehuda248854 34.92
344 Mainka, Romuald248852 27.71
345 Foisor, Ovidiu248859 31.82
346 Marjanovic, Slavoljub248852 36.07
347 Brenninkmeijer, Joris248851 21.38
348 Meduna, Eduard248752 40.39
349 Komarov, Dimitri248760 22.16
350 Franco Ocampos, Zenon248751 34.72
351 Nikolac, Juraj248668 58.77
352 Rytshagov, Mikhail248660 23.22
353 Vehi Bach, Victor Manuel248658
354 Tolnai, Tibor248650 26.36
355 Arencibia, Walter248550 23.53
356 Barbulescu, Dan248476 26.61
357 Ardiansyah, Haji248463 39.15
358 Sahovic, Dragutin248464 50.48
359 Ghinda, Mihail Viorel248356 41.52
360 Jansa, Vlastimil248351 48.18
361 Annageldyev, Orazly248368 30.86
362 Reshevsky, Samuel H248363 79.18
363 Lein, Anatoly248354 59.84
364 Schmittdiel, Eckhard248350 30.72
365 Andrianov, Nikolai248264 29.11
366 Thorsteins, Karl248252 26.30
367 Edelman, Daniel248261 21.92
368 Yuferov, Sergey N248258 45.16
369 Ekstroem, Roland248163 34.69
370 Zlotnik, Boris A248165 44.29
371 Groszpeter, Attila248149 30.64
372 Gaprindashvili, Nona248158 49.74
373 Frias, Victor J248154 34.97
374 Vogt, Lothar H248151 39.04
375 Ermenkov, Evgenij248051 41.34
376 Klinger, Josef248050 23.65
377 Moroz, Alexander248061 30.04
378 Solozhenkin, Evgeniy248061 24.50
379 Sunye Neto, Jaime248051 33.74
380 Romero Holmes, Alfonso248051 25.67
381 Murey, Yakov247952 49.49
382 Womacka, Mathias247862 24.60
383 Tisdall, Jonathan D247850 32.43
384 Dizdarevic, Emir247853 32.83
385 Barbero, Gerardo F247851 29.44
386 Norwood, David247853 22.33
387 Kosashvili, Yona247758 20.58
388 Pekarek, Ales247756 29.12
389 Lin Ta247758 27.99
390 Khasin, Alexander247761 39.76
391 Zezulkin, Jurij247766 19.46
392 Espig, Lutz247653 42.07
393 Hazai, Laszlo247658 37.63
394 Dzuban, Oleg I247665
395 Magem Badals, Jordi247554 23.44
396 Lukacs, Peter247449 40.56
397 Piskov, Yury247456 29.30
398 Kapetanovic, Armin247463
399 Klundt, Klaus247468 49.10
400 Zhelnin, Vladimir V247361 43.88
401 Tempone, Marcelo247358 28.40
402 Anic, Darko247360 33.75
403 Badea, Bela247361 21.94
404 Davies, Nigel R247350 30.50
405 Lendwai, Reinhard247257 24.30
406 Knezevic, Milorad247255 54.25
407 Efimov, Igor247263 30.37
408 Poluljahov, Aleksandr247159 25.65
409 Campos, Jose Felix247169 24.93
410 Hector, Jonny247149 26.96
411 Kouatly, Bachar247155 32.91
412 Kraidman, Yair247165 58.25
413 Saltaev, Mihail247170 28.20
414 Reeh, Oliver247152 27.03
415 Rajkovic, Dusan247051 48.62
416 Ornstein, Axel247062 38.77
417 Ostenstad, Berge247050 26.37
418 Hebden, Mark247051 32.95
419 Ionescu, Constantin247054 32.38
420 Schmidt, Wlodzimierz246950 47.81
421 Negulescu, Adrian246970 29.64
422 Kolev, Atanas246953 23.54
423 Mednis, Edmar J246954 53.86
424 Soppe, Guillermo246955 30.37
425 Beshukov, Sergei246956 19.83
426 Temirbaev, Serik246862
427 Bruk, Ofer246858 23.05
428 Sideif Sade, Fikret I246861 39.08
429 Hresc, Vladimir246867 39.20
430 Urday, Henry246756 23.57
431 Moldobaev, Emelbek246766
432 Shmuter, Leonid246768 21.74
433 Schoenthier, Frank246669 32.20
434 Gurgenidze, Bukhuti I246669 57.22
435 Poldauf, Dirk246663 25.37
436 Santo Roman, Marc246654 30.38
437 Moiseev, Viktor246567 31.72
438 Prandstetter, Eduard246556 42.13
439 Fernandez Garcia, Jose Luis246553 36.74
440 Ginsburg, Gennadij246571 19.47
441 Schussler, Harry246554 33.60
442 Gurevich, Ilya246568 18.97
443 Ledger, Andrew246558 21.69
444 Rakic, Tomislav246568 56.22
445 Legky, Nikolay A246558 35.80
446 Gonzalez, JA.246466
447 Martynov, Pavel246471 23.08
448 Conquest, Stuart246349 23.91
449 Mukhametov, Eldar246363 21.69
450 Mortensen, Erling246351 35.82
451 Godena, Michele246256 23.59
452 Finegold, Benjamin246253 21.40
453 Gschnitzer, Oswald246254 24.97
454 Johansen, Darryl K246258 31.98
455 Byrne, Robert E246259 62.78
456 Gligoric, Svetozar246253 67.99
457 Filipenko, Alexander V246164 41.91
458 Lagunow, Alexander246169 23.55
459 Renman, Nils Gustaf246173
460 Fishbein, Alexander246153 22.73
461 Zilberstein, Valery I246174 47.80
462 Castro Rojas, Oscar Humberto246157 37.73
463 Zlochevskij, Alexander246070 27.60
464 Ree, Hans246055 46.38
465 Pichler, Juergen246066 29.66
466 Schlosser, Philipp246050 22.45
467 Abramovic, Boško246051 39.96
468 Gomez Baillo, Jorge H246057 31.78
469 Howell, James C245953 23.70
470 Semeniuk, Alexander A245969 38.39
471 Antunes, Antonio245952 28.98
472 Stangl, Markus245950 21.76
473 Perovic, Dragan245870
474 Garcia Palermo, Carlos245853 37.16
475 Drasko, Milan245852 28.15
476 Gutman, Lev245850 45.35
477 Antonio, Rogelio Jr245762 28.94
478 Vorotnikov, Vladislav V245761 43.45
479 Ivanov, Sergey245759 29.34
480 Ivanov, V.245774
481 Rukavina, Josip245665 48.17
482 Kozlov, V.245674
483 Cid, Marino Alejandro245666 32.63
484 Kantsler, Boris245658 28.79
485 Levitt, Jonathan245651 27.66
486 Podzielny, Karl Heinz245668 36.39
487 Yailjan, M.245574
488 Brooks, Michael A245558 29.79
489 Reyes, Juan245560 27.76
490 Nasybullin, Vladislav245572
491 Donchenko, Anatoly G245562 50.41
492 Kirov Ivanov, Nino245554 45.39
493 Flear, Glenn C245450 31.96
494 Semkov, Semko245457 30.92
495 Mohr, Georg245454 25.99
496 Maksimenko, Andrei245464 21.15
497 Bergstrom, Christer245470 32.34
498 Arkhangelsky, Boris245372 60.03
499 Klebel, Martin245360 24.72
500 Blatny, Pavel245250 22.61

These ratings, calculated as of January 31, 1991, incorporate all games (against rated opponents) played in the time between February 1, 1990 and January 31, 1991, along with the ratings that were already calculated as of January 31, 1990. 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 January 31, 1991. This represents the player's estimated strength on February 1, 1991.

+/- 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 February 1, 1991. The +/- value represents the standard deviation of that estimate; the player's true strength on February 1, 1991 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 February 1, 1991. 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 January 31, 1991. 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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