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Top 10 active players as of February 28, 1991


Top 500 active players as of February 28, 1991

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28434968.4% #227.87
2 Karpov, Anatoly E27884816.3% #439.76
3 Ivanchuk, Vassily27744810.7% #621.94
4 Gelfand, Boris2713481.0% #2122.68
5 Beliavsky, Alexander G2699480.4% #2737.20
6 Bareev, Evgeny2699490.5% #2924.27
7 Salov, Valery B2698500.6% #2926.76
8 Yudasin, Leonid G2685490.3% #3731.55
9 Gurevich, Mikhail N2684490.2% #3832.02
10 Timman, Jan H2678480.1% #4239.21
11 Short, Nigel D2678480.2% #4225.74
12 Chernin, Alexander M2673480.1% #4630.97
13 Korchnoi, Viktor L2670470.1% #4759.93
14 Jussupow, Artur M2667490.1% #5131.04
15 Khalifman, Alexander2662480.1% #5625.11
16 Polugaevsky, Lev A2661490.1% #5756.27
17 Epishin, Vladimir2660500.1% #5825.63
18 Lputian, Smbat G265949 #5933.04
19 Dolmatov, Sergey V265749 #6032.02
20 Nunn, John D M2656490.1% #6135.84
21 Dautov, Rustem2656530.1% #6425.25
22 Speelman, Jonathan S265548 #6234.40
23 Anand, Viswanathan265149 #6621.21
24 Vyzmanavin, Alexey2651510.1% #6931.16
25 Seirawan, Yasser265047 #6630.92
26 Andersson, Ulf264848 #6939.67
27 Shirov, Alexei264849 #7018.65
28 Hübner, Robert264448 #7342.31
29 Ljubojevic, Ljubomir264348 #7540.32
30 Eingorn, Viacheslav S264249 #7734.26
31 Nikolic, Predrag264148 #7630.46
32 Vaganian, Rafael A264148 #7739.37
33 Balashov, Yury S263849 #8041.95
34 Ehlvest, Jaan263648 #8228.37
35 Gavrikov, Victor N263449 #8533.58
36 Romanishin, Oleg M263349 #8539.13
37 Kramnik, Vladimir263057 #9615.68
38 Agdestein, Simen263051 #9123.79
39 Tal, Mikhail262749 #9254.30
40 Azmaiparashvili, Zurab A262749 #9330.94
41 Dorfman, Iosif D262650 #9338.82
42 Adams, Michael262648 #9319.28
43 Dzindzichashvili, Roman Y262651 #9546.81
44 Sax, Gyula262548 #9339.69
45 Vladimirov, Evgeny Y262350 #9834.11
46 Panchenko, Alexandar G2622650.1% #11029.89
47 Ribli, Zoltán262149 #9939.48
48 Portisch, Lajos262149 #10053.90
49 Dreev, Alexey262149 #9922.11
50 Yurtaev, Leonid261955 #10631.82
51 Sveshnikov, Evgeny E261952 #10441.05
52 Oll, Lembit261950 #10224.85
53 Vaulin, Alexander261658 #11233.94
54 Sturua, Zurab2612650.1% #12231.72
55 Razuvaev, Yury S261250 #11145.38
56 Hansen, Curt261149 #11126.44
57 Chandler, Murray G261148 #11130.90
58 Hjartarson, Jóhann261048 #11128.05
59 Kruppa, Yuri260857 #12026.69
60 Sokolov, Andrey Y260749 #11527.93
61 deFirmian, Nicholas E260649 #11733.59
62 Rozentalis, Eduardas260351 #12227.75
63 Tiviakov, Sergei260356 #12518.04
64 Kamsky, Gata260350 #12116.74
65 Ulibin, Mikhail260351 #12219.74
66 Georgiev, Kiril260149 #12225.25
67 Christiansen, Larry M260150 #12234.67
68 Gulko, Boris F260148 #12244.05
69 Aseev, Konstantin N260152 #12530.36
70 Yermolinsky, Alex V260058 #12932.88
71 Miles, Anthony J260048 #12335.85
72 Ruban, Vadim260051 #12526.71
73 Pigusov, Evgeny259952 #12629.91
74 Goldin, Alexander259852 #12726.00
75 Kuzmin, Gennady P259752 #12945.11
76 Neverov, Valery259652 #13026.69
77 Larsen, Bent259550 #12955.98
78 Kengis, Edvins259552 #13231.88
79 Lerner, Konstantin Z259451 #13140.99
80 Psakhis, Lev B259449 #13032.25
81 Pintér, József259454 #13337.30
82 Akopian, Vladimir259451 #13219.22
83 Vaisser, Anatoli259352 #13341.97
84 Dvoiris, Semen I259151 #13532.32
85 Spassky, Boris V258950 #13654.08
86 Smirin, Ilia258850 #13723.10
87 Ftácnik, Lubomír258748 #13733.33
88 Yakovich, Yuri258753 #14128.25
89 Smagin, Sergey258649 #13832.47
90 Kurajica, Bojan258555 #14443.29
91 Krasenkow, Michal258550 #14127.29
92 Makarichev, Sergey Y258453 #14337.28
93 Novikov, Igor A258250 #14428.76
94 Kharitonov, Andrey Y258152 #14631.90
95 Timoshchenko, Gennady258152 #14641.84
96 Kovalev, Andrei257953 #14929.31
97 Tukmakov, Vladimir B257948 #14644.95
98 Pétursson, Margeir257848 #14631.04
99 Glek, Igor V257853 #14929.31
100 Kuzmin, Alexey257856 #15327.97
101 Suba, Mihai257751 43.74
102 Alburt, Lev O257752 45.52
103 Barua, Dibyendu257755 24.34
104 Mestel, A Jonathan257755 33.95
105 Dokhoian, Yury257751 26.34
106 Benjamin, Joel L257649 26.96
107 Geller, Efim P257652 65.98
108 Giorgadze, Giorgi257556 26.38
109 Gorelov, Sergey G257366 33.53
110 Kožul, Zdenko257249 24.77
111 Dlugy, Maxim257050 25.08
112 Hort, Vlastimil257049 47.13
113 Shabanov, Yury F257061 53.30
114 Naumkin, Igor256952 25.55
115 Wahls, Matthias256849 23.09
116 Baburin, Alexander256662 24.03
117 Sokolov, Ivan256649 22.71
118 Podgaets, Mikhail Y256674 43.60
119 Ubilava, Elizbar E256552 40.50
120 Morovic Fernández, Iván E256454 27.92
121 Torre, Eugenio256452 39.32
122 Shneider, Aleksandr256354 28.77
123 Ionov, Sergey256259 29.14
124 Taimanov, Mark E256258 65.06
125 Vasiukov, Evgeny A256251 57.97
126 Smyslov, Vassily V256250 69.92
127 Lobron, Eric256149 30.81
128 Huzman, Alexander256157 28.88
129 Damljanovic, Branko256149 29.70
130 Smejkal, Jan256050 44.93
131 Olafsson, Helgi256049 34.54
132 Machulsky, Anatoly D255958 34.43
133 Piket, Jeroen255948 22.09
134 Graf, Alexander255860 28.51
135 Hodgson, Julian M255849 27.59
136 Malaniuk, Vladimir P255849 33.60
137 Lalic, Bogdan255752 26.97
138 Kudrin, Sergey255752 31.47
139 Rogers, Ian255749 30.68
140 Brodsky, Michail255757 21.91
141 Kveinys, Aloyzas255754 28.64
142 Orlov, Georgi255559
143 Adorján, András255350 40.91
144 Rohde, Michael A255353 31.51
145 Sorokin, Maxim255254 23.10
146 van der Wiel, John T H255248 31.55
147 Fominyh, Alexander255157 31.70
148 Illescas Cordoba, Miguel255149 25.23
149 Khenkin, Igor255053 22.93
150 Hulak, Krunoslav255051 39.76
151 Kharlov, Andrei255057 22.27
152 Malisauskas, Vidmantas255054 27.57
153 Mokrý, Karel255051 32.06
154 Nogueiras, Jesus254949 31.61
155 Popovic, Petar254950 32.04
156 Sosonko, Gennadi254955 47.78
157 Rashkovsky, Nukhim N254951 44.86
158 Fedorowicz, John P254849 32.42
159 Kaidanov, Gregory S254852 31.38
160 Kavalek, Lubomir254865 47.55
161 Knaak, Rainer F254851 37.94
162 Magerramov, Elmar S254853 32.88
163 Tseshkovsky, Vitaly V254851 46.43
164 Frolov, Artur254758 20.58
165 Averkin, Orest N254765 47.01
166 Ye Jiangchuan254757 30.27
167 Zhuravliov, Valerij254666 52.21
168 Lutz, Christopher254651 20.01
169 Minasian, Artashes254554 24.10
170 Arkhipov, Sergey254554 36.68
171 Chekhov, Valery A254551 35.25
172 Zagrebelny, Sergey254566
173 Kholmov, Ratmir D254451 65.79
174 Xie Jun254467 20.33
175 Gleizerov, Evgeny254457 27.93
176 Zapata, Alonso254449 32.52
177 Lanka, Zigurds254355 30.77
178 Granda Zuńiga, Julio E254251 24.01
179 Ikonnikov, Vyacheslav254260 24.95
180 Ivanov, Alexander V254151 34.82
181 Lautier, Joel254149 17.88
182 Kuporosov, Viktor254160 29.42
183 Petrienko, Vladimir254065 35.96
184 Didishko, Vereslav254067 41.88
185 Browne, Walter S254051 42.13
186 Kovacevic, Vladimir254051 48.92
187 Hellers, Ferdinand253949 22.08
188 Xu Jun253956 28.45
189 Arbakov, Valentin253960 39.08
190 Kindermann, Stefan253948 31.17
191 Ziatdinov, Raset253961 32.17
192 Kupreichik, Viktor D253951 41.65
193 King, Daniel J253948 27.50
194 Mikhalchishin, Adrian B253851 36.28
195 Arnason, Jon L253750 30.29
196 Georgadze, Tamaz V253761 43.30
197 Karpman, Vadim253759 25.79
198 Kalinitschew, Sergey253765 35.07
199 Bologan, Viktor253769 19.21
200 Sherbakov, Ruslan253754 21.46
201 Kochiev, Alexander253654 34.92
202 Spraggett, Kevin B253649 36.30
203 Shabalov, Alexander253653 23.46
204 Polgar, Zsuzsa253649 21.86
205 Uhlmann, Wolfgang253551 55.91
206 Velimirovic, Dragoljub253551 48.79
207 Stohl, Igor253449 26.42
208 Janjgava, Lasha253354 20.81
209 Khmelnitsky, Igor N253368 22.52
210 Serper, Grigory253353 21.46
211 Bönsch, Uwe253350 32.37
212 Palac, Mladen253355 20.03
213 Cvitan, Ognjen253150 29.38
214 Tischbierek, Raj253152 28.43
215 Sher, Miron N253152 38.66
216 Novik, Maxim253068 27.21
217 Chudinovskih, Alexander252871 23.96
218 Rachels, Stuart252857 21.42
219 Wilder, Michael252855 28.45
220 Bagirov, Vladimir K252853 54.53
221 Donchev, Dimitar I252757 32.60
222 Bikhovsky, Avigdor I252758 35.97
223 Sakaev, Konstantin252761 16.87
224 Wojtkiewicz, Aleksander252748 28.12
225 Vitolinš, Alvis252763 44.70
226 Guseinov, Aidyn252661 39.16
227 Milos, Gilberto252652 27.33
228 Panchenko, Alexander N252552 37.40
229 Najdorf, Miguel252467 80.87
230 Greenfeld, Alon252454 26.86
231 Quinteros, Miguel A252456 43.17
232 Savchenko, Stanislav252459 24.10
233 Darga, Klaus V252370 57.01
234 Pfleger, Helmut252359 47.56
235 Hertneck, Gerald252252 27.44
236 Lukin, Andrei M252255 42.50
237 Gruenberg, Hans Ulrich252251 35.14
238 Wang Zili252159 22.71
239 Anikaev, Yury252066 42.66
240 Gofshtein, Leonid D251973 37.85
241 Chiburdanidze, Maia G251952 30.11
242 Kishnev, Sergey251968 34.32
243 Bischoff, Klaus251849 29.72
244 Tseitlin, Mark D251867 47.43
245 Tseitlin, Mikhail S251752 43.70
246 Zhidkov, Valery S251760 51.48
247 Liberzon, Vladimir M251765 53.93
248 Varavin, Viktor251660 23.76
249 Matulovic, Milan251558 55.72
250 Hansen, Lars Bo251549 22.43
251 Ye Rongguang251553 27.40
252 Marin, Mihail251553 25.85
253 Faragó, Iván251550 44.91
254 Cámpora, Daniel H251550 33.66
255 London, Dimitri251573 28.27
256 Tunik, Gennady251556 37.75
257 Vukic, Milan251554 47.53
258 Ivanovic, Božidar251450 44.51
259 Wolff, Patrick G251451 23.04
260 Belov, Igor251457
261 Plaskett, Jim251454 30.94
262 Kosic, Dragan251261 21.04
263 Cifuentes Parada, Roberto251253 33.19
264 Gipslis, Aivars251262 54.05
265 Henley, Ron W251268 34.23
266 Moskalenko, Viktor251251 30.23
267 Panno, Oscar R251152 55.94
268 Gufeld, Eduard E251160 54.94
269 Kotronias, Vasilios251150 26.51
270 Timoshenko, Georgy251052 24.74
271 Makarov, Marat251059 27.81
272 Anastasian, Ashot251053 26.62
273 Palatnik, Semen A250955 40.92
274 Rodriguez Vargas, Orestes250956 47.65
275 Ivanov, Igor V250953 44.14
276 Petkevich, Jusefs250861 50.19
277 Basin, Leonid250862 33.26
278 Nikolenko, Oleg250864 31.69
279 Cramling, Pia250850 27.85
280 Magomedov, Magaram250857 24.77
281 Spasov, Vasil250752 20.03
282 Kosten, Anthony C250749 32.59
283 Lau, Ralf250751 31.36
284 Bass, Leonid250757 33.75
285 Simic, Radoslav250556 42.72
286 Djuric, Stefan250552 35.59
287 Ernst, Thomas250551 30.53
288 Horvath, Jozsef250550 26.54
289 Veingold, Aleksander250459 37.38
290 Murey, Yakov250453 49.57
291 Rodriguez, Amador250450 34.47
292 Gheorghiu, Florin250451 46.89
293 Zakharov, Alexander V250369 47.39
294 Karlsson, Lars250352 35.63
295 Yuneev, Alexey250359
296 Arencibia, Walter250350 23.60
297 Bronstein, David I250356 67.03
298 Dizdar, Goran250352 32.23
299 Yrjola, Jouni250352 31.34
300 Cebalo, Mišo250251 46.06
301 Loginov, Valery A250253 35.21
302 Georgiev, Krum250152 32.76
303 Rechlis, Gad250154 24.06
304 Duer, Arne250063 31.63
305 Kallai, Gabor250056 32.02
306 Gurevich, Vladimir250061 31.57
307 Titov, German249958 27.84
308 Rivas Pastor, Manuel249956 30.62
309 Kurtenkov, Atanas249968 27.57
310 Unzicker, Wolfgang249854 65.67
311 Sellos, Didier249865 34.02
312 Rubinetti, Jorge A249760 45.91
313 Dimitrov, Vladimir249756 22.88
314 Watson, William N249750 28.86
315 Lima, Darcy249761 28.77
316 Meister, Yakov249662 35.46
317 Mochalov, Evgeny V249665 39.33
318 Van der Sterren, Paul249649 34.94
319 Petrosian, Arshak B249551 37.20
320 Polgar, Judit249551 14.60
321 Beim, Valery249462 40.94
322 Shipov, Sergei249374 24.86
323 Kiselev, Sergey249353 29.46
324 Tabatadze, Tamaz249367 22.91
325 Dzuban, Oleg I249365
326 Hickl, Joerg249250 25.87
327 Savon, Vladimir A249251 50.42
328 Renet, Olivier249150 26.19
329 Bukic, Enver249172 53.24
330 García Gonzáles, Guillermo249056 37.22
331 Foisor, Ovidiu249059 31.89
332 Stoica, Valentin248976 41.04
333 Nikolac, Juraj248967 58.85
334 Gaprindashvili, Nona248958 49.82
335 Zaichik, Gennady L248953 34.05
336 Brenninkmeijer, Joris248851 21.46
337 Brunner, Lucas248848 23.75
338 Komarov, Dimitri248860 22.24
339 Magem Badals, Jordi248852 23.51
340 Klinger, Josef248850 23.73
341 Yuferov, Sergey N248758 45.23
342 Meduna, Eduard248752 40.46
343 Sahovic, Dragutin248764 50.55
344 Tolnai, Tibor248750 26.43
345 Annageldyev, Orazly248768 30.93
346 Csom, István248751 50.74
347 Sunye Neto, Jaime248751 33.82
348 Inkiov, Ventzislav248650 34.78
349 Popchev, Milko248656 26.30
350 Marjanovic, Slavoljub248552 36.14
351 Barbulescu, Dan248576 26.68
352 Zlotnik, Boris A248565 44.37
353 Schmittdiel, Eckhard248550 30.79
354 Rytshagov, Mikhail248560 23.29
355 Moroz, Alexander248561 30.11
356 Norwood, David248453 22.40
357 Ermenkov, Evgenij248451 41.41
358 Lein, Anatoly248354 59.91
359 Todorcevic, Miodrag248350 50.30
360 Gruenfeld, Yehuda248355 34.99
361 Barlov, Dragan248351 34.08
362 Klundt, Klaus248368 49.18
363 Franco Ocampos, Zenon248250 34.79
364 Doroshkievich, Vladimir K248264 53.17
365 Soppe, Guillermo248255 30.45
366 Thorsteins, Karl248253 26.37
367 Kuczynski, Robert248250 24.86
368 Solozhenkin, Evgeniy248161 24.58
369 Ghinda, Mihail Viorel248158 41.59
370 Vorotnikov, Vladislav V248161 43.53
371 Ardiansyah, Haji248163 39.23
372 Haba, Petr248152 26.14
373 Jansa, Vlastimil248150 48.25
374 Frias, Victor J248054 35.05
375 Khasin, Alexander248061 39.83
376 Tisdall, Jonathan D248050 32.51
377 Espig, Lutz248053 42.15
378 Cabrilo, Goran248050 32.66
379 Ekstroem, Roland247963 34.77
380 Reeh, Oliver247952 27.11
381 Piskov, Yury247856 29.38
382 Kosashvili, Yona247858 20.65
383 Tempone, Marcelo247858 28.48
384 Groszpeter, Attila247849 30.72
385 Reshevsky, Samuel H247863 79.26
386 Rausis, Igors247856 29.89
387 Badea, Bela247761 22.02
388 Ionescu, Constantin247755 32.46
389 Mainka, Romuald247752 27.79
390 Saltaev, Mihail247770 28.28
391 Barbero, Gerardo F247650 29.52
392 Vera, Reynaldo247653 30.14
393 Ivkov, Borislav247653 57.29
394 Lin Ta247658 28.08
395 Hector, Jonny247649 27.04
396 Hazai, Laszlo247658 37.71
397 Fishbein, Alexander247552 22.80
398 Rajkovic, Dusan247551 48.70
399 Lendwai, Reinhard247557 24.37
400 Zhelnin, Vladimir V247561 43.95
401 Kouatly, Bachar247555 32.98
402 Pekarek, Ales247556 29.20
403 Andrianov, Nikolai247464 29.19
404 Godena, Michele247456 23.66
405 Filipenko, Alexander V247464 41.98
406 Womacka, Mathias247462 24.67
407 Garcia Palermo, Carlos247453 37.24
408 Zezulkin, Jurij247466 19.53
409 Mirkovic, Slobodan247363 32.58
410 Vogt, Lothar H247351 39.11
411 Romero Holmes, Alfonso247351 25.75
412 Beshukov, Sergei247357 19.91
413 Hebden, Mark247350 33.04
414 Campos, Jose Felix247269 25.01
415 Kraidman, Yair247265 58.32
416 Poluljahov, Aleksandr247160 25.73
417 Efimov, Igor247163 30.45
418 Knezevic, Milorad247155 54.33
419 Abramovic, Boško247051 40.04
420 Sadler, Matthew247055 16.79
421 Bruk, Ofer247060 23.12
422 Moldobaev, Emelbek247066
423 Urday, Henry247056 23.65
424 Mednis, Edmar J247054 53.93
425 Davies, Nigel R247050 30.58
426 Gurevich, Ilya247068 19.05
427 Shmuter, Leonid246968 21.82
428 Kapetanovic, Armin246959
429 Finegold, Benjamin246952 21.48
430 Temirbaev, Serik246862
431 Semkov, Semko246858 30.99
432 Ornstein, Axel246762 38.84
433 Lukacs, Peter246750 40.64
434 Ostenstad, Berge246750 26.45
435 Ginsburg, Gennadij246771 19.55
436 Sideif Sade, Fikret I246761 39.16
437 Gallagher, Joseph G246649 26.82
438 Prandstetter, Eduard246656 42.20
439 Schussler, Harry246654 33.68
440 Poldauf, Dirk246663 25.45
441 Schoenthier, Frank246669 32.28
442 Dizdarevic, Emir246653 32.90
443 Martynov, Pavel246671 23.16
444 Gonzalez, JA.246565
445 Kolev, Atanas246554 23.62
446 Schmidt, Wlodzimierz246550 47.88
447 Moiseev, Viktor246567 31.79
448 Gurgenidze, Bukhuti I246469 57.29
449 Byrne, Robert E246459 62.86
450 Ivanov, V.246474
451 Drasko, Milan246452 28.23
452 Gomez Baillo, Jorge H246357 31.86
453 Legky, Nikolay A246358 35.88
454 Stangl, Markus246250 21.83
455 Gligoric, Svetozar246253 68.07
456 Castro Rojas, Oscar Humberto246157 37.80
457 Schlosser, Philipp246150 22.53
458 Flear, Glenn C246150 32.04
459 Kantsler, Boris246158 28.87
460 Zlochevskij, Alexander246070 27.68
461 Mukhametov, Eldar246063 21.77
462 Conquest, Stuart246049 23.98
463 Hresc, Vladimir246067 39.27
464 Vehi Bach, Victor Manuel245956
465 Johansen, Darryl K245958 32.07
466 Brooks, Michael A245958 29.86
467 Perovic, Dragan245870
468 Mozes, Ervin245870 45.15
469 Antonio, Rogelio Jr245862 29.03
470 Antunes, Antonio245751 29.06
471 Ivanov, Sergey245759 29.41
472 Lagunow, Alexander245769 23.62
473 Fernandez Garcia, Jose Luis245753 36.82
474 Nasybullin, Vladislav245772
475 Kozlov, V.245774
476 Gschnitzer, Oswald245753 25.05
477 Rukavina, Josip245764 48.25
478 Pichler, Juergen245666 29.73
479 Lechtynsky, Jiri245655 43.26
480 Blatny, Pavel245550 22.68
481 Zilberstein, Valery I245574 47.87
482 Marangunic, Srdjan245573 47.33
483 Renman, Nils Gustaf245573
484 Levin, Felix245467 32.31
485 Bellon Lopez, Juan Manuel245452 40.80
486 Strikovic, Aleksa245452 29.79
487 Levitt, Jonathan245451 27.73
488 Filipovic, Branko245459 33.39
489 Ninov, Kiril245355 22.39
490 Kirov Ivanov, Nino245354 45.47
491 Plachetka, Jan245350 46.03
492 Ilincic, Zlatko245352 22.80
493 Ree, Hans245356 46.45
494 Lanc, Alois245356 43.03
495 Mohr, Stefan245350 23.35
496 Trapl, Jindrich245375 48.92
497 Gutman, Lev245250 45.42
498 Arkhangelsky, Boris245272 60.10
499 Adianto, Utut245258 25.94
500 Vallifuoco, Giacomo245172 33.82

These ratings, calculated as of February 28, 1991, incorporate all games (against rated opponents) played in the time between March 1, 1990 and February 28, 1991, along with the ratings that were already calculated as of February 28, 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 February 28, 1991. This represents the player's estimated strength on March 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 March 1, 1991. The +/- value represents the standard deviation of that estimate; the player's true strength on March 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 March 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 February 28, 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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