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Top 10 active players as of March 31, 1991


Top 500 active players as of March 31, 1991

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28464972.1% #227.96
2 Karpov, Anatoly E27834814.0% #539.86
3 Ivanchuk, Vassily2770499.2% #622.04
4 Gelfand, Boris2715481.0% #1922.77
5 Beliavsky, Alexander G2699480.5% #2737.29
6 Bareev, Evgeny2699490.5% #2824.36
7 Salov, Valery B2698500.6% #3026.85
8 Gurevich, Mikhail N2690490.3% #3332.11
9 Yudasin, Leonid G2680490.2% #4031.65
10 Short, Nigel D2680480.1% #4025.83
11 Timman, Jan H2679480.2% #4139.30
12 Chernin, Alexander M2675480.1% #4431.07
13 Korchnoi, Viktor L2667480.1% #5060.02
14 Jussupow, Artur M2663490.1% #5431.13
15 Khalifman, Alexander2663480.1% #5425.20
16 Dolmatov, Sergey V2660490.1% #5832.11
17 Lputian, Smbat G265649 #6233.13
18 Epishin, Vladimir265549 #6225.72
19 Speelman, Jonathan S265448 #6234.50
20 Anand, Viswanathan2653490.1% #6421.30
21 Seirawan, Yasser265248 #6531.02
22 Polugaevsky, Lev A265149 #6656.36
23 Dautov, Rustem2650520.1% #6825.34
24 Shirov, Alexei264849 #6918.74
25 Andersson, Ulf264848 #6839.76
26 Balashov, Yury S264749 #7042.05
27 Gavrikov, Victor N264549 #7233.67
28 Hübner, Robert264549 #7242.40
29 Eingorn, Viacheslav S264249 #7434.35
30 Nunn, John D M264248 #7635.93
31 Nikolic, Predrag264148 #7530.55
32 Ehlvest, Jaan264148 #7628.46
33 Vaganian, Rafael A263948 #7839.46
34 Vyzmanavin, Alexey263851 #8131.25
35 Azmaiparashvili, Zurab A263449 #8531.04
36 Ljubojevic, Ljubomir263349 #8540.41
37 Dorfman, Iosif D263150 #8838.91
38 Kramnik, Vladimir2629570.1% #9515.77
39 Sax, Gyula262748 #9239.79
40 Adams, Michael262548 #9319.37
41 Tal, Mikhail262449 #9554.39
42 Agdestein, Simen262451 #9723.88
43 Vaulin, Alexander262459 #10334.04
44 Vladimirov, Evgeny Y262250 #9834.20
45 Dzindzichashvili, Roman Y262251 #10046.90
46 Dreev, Alexey262149 #9922.20
47 Ribli, Zoltán262149 #9939.57
48 Oll, Lembit262049 #10124.93
49 Panchenko, Alexandar G2620650.1% #11229.97
50 Yurtaev, Leonid262055 #10431.91
51 Portisch, Lajos262049 #10153.98
52 Sveshnikov, Evgeny E261952 #10441.14
53 Hansen, Curt261649 #10526.54
54 Romanishin, Oleg M261349 #10839.22
55 Razuvaev, Yury S261250 #11045.47
56 Kamsky, Gata261150 #11116.83
57 Sokolov, Andrey Y261049 #11328.03
58 Sturua, Zurab261065 #12531.81
59 Hjartarson, Jóhann260849 #11328.15
60 Chandler, Murray G260848 #11330.98
61 Kruppa, Yuri260757 #12126.78
62 Miles, Anthony J260648 #11635.93
63 Georgiev, Kiril260648 #11625.34
64 Christiansen, Larry M260449 #12034.76
65 Goldin, Alexander260452 #12126.09
66 Ruban, Vadim260351 #12226.80
67 Larsen, Bent260050 #12456.07
68 deFirmian, Nicholas E259949 #12433.68
69 Akopian, Vladimir259851 #12719.32
70 Ulibin, Mikhail259851 #12819.83
71 Gulko, Boris F259848 #12544.14
72 Lerner, Konstantin Z259751 #12841.09
73 Kengis, Edvins259552 #13231.96
74 Neverov, Valery259552 #13126.78
75 Kuzmin, Gennady P259552 #13145.20
76 Aseev, Konstantin N259551 #13130.45
77 Pigusov, Evgeny259552 #13229.99
78 Psakhis, Lev B259449 #12932.34
79 Rozentalis, Eduardas259351 #13227.84
80 Dvoiris, Semen I259351 #13432.41
81 Yermolinsky, Alex V259056 #14032.96
82 Vaisser, Anatoli259051 #13742.07
83 Pintér, József258954 #13937.39
84 Spassky, Boris V258651 #14054.17
85 Yakovich, Yuri258653 #14328.34
86 Novikov, Igor A258549 #14028.86
87 Kharitonov, Andrey Y258552 #14331.98
88 Tukmakov, Vladimir B258548 #13945.04
89 Tiviakov, Sergei258456 #14618.13
90 Torre, Eugenio258451 #14339.41
91 Kurajica, Bojan258355 #14743.38
92 Pétursson, Margeir258248 #14331.13
93 Timoshchenko, Gennady258152 #14641.92
94 Smirin, Ilia258050 #14623.19
95 Ftácnik, Lubomír258048 #14533.42
96 Makarichev, Sergey Y257954 #15037.37
97 Giorgadze, Giorgi257855 #15126.47
98 Dokhoian, Yury257851 #14826.43
99 Smagin, Sergey257748 #14832.56
100 Wahls, Matthias257649 #14923.18
101 Alburt, Lev O257652 45.61
102 Hodgson, Julian M257648 27.68
103 Krasenkow, Michal257650 27.38
104 Mestel, A Jonathan257556 34.05
105 Kuzmin, Alexey257557 28.06
106 Dlugy, Maxim257550 25.17
107 Hort, Vlastimil257449 47.22
108 Benjamin, Joel L257349 27.05
109 Kožul, Zdenko257349 24.86
110 Barua, Dibyendu257255 24.43
111 Ubilava, Elizbar E257051 40.59
112 Suba, Mihai257051 43.83
113 Shabanov, Yury F257061 53.39
114 Gorelov, Sergey G257067 33.62
115 Kudrin, Sergey257052 31.57
116 Lobron, Eric256949 30.90
117 Sokolov, Ivan256949 22.80
118 Kovalev, Andrei256853 29.40
119 Glek, Igor V256852 29.40
120 Brodsky, Michail256657 22.01
121 Sakaev, Konstantin256657 16.96
122 Damljanovic, Branko256549 29.79
123 Podgaets, Mikhail Y256574 43.69
124 Naumkin, Igor256352 25.64
125 Baburin, Alexander256261 24.12
126 Geller, Efim P256151 66.08
127 Morovic Fernández, Iván E256154 28.02
128 Shneider, Aleksandr256154 28.86
129 Huzman, Alexander256157 28.97
130 Serper, Grigory256052 21.55
131 Smejkal, Jan256050 45.02
132 Kharlov, Andrei255957 22.36
133 Piket, Jeroen255848 22.18
134 Taimanov, Mark E255858 65.15
135 Ionov, Sergey255758 29.23
136 Graf, Alexander255760 28.60
137 Knaak, Rainer F255750 38.04
138 Ziatdinov, Raset255758 32.26
139 Ye Jiangchuan255656 30.36
140 Rogers, Ian255649 30.77
141 Chekhov, Valery A255651 35.34
142 Hulak, Krunoslav255651 39.85
143 Vasiukov, Evgeny A255551 58.07
144 Adorján, András255550 40.99
145 Smyslov, Vassily V255550 70.02
146 Olafsson, Helgi255549 34.63
147 Rohde, Michael A255454 31.60
148 Orlov, Georgi255459
149 van der Wiel, John T H255448 31.64
150 Kveinys, Aloyzas255354 28.73
151 Lutz, Christopher255250 20.10
152 Kaidanov, Gregory S255252 31.47
153 Lalic, Bogdan255152 27.06
154 Popovic, Petar255150 32.13
155 Illescas Cordoba, Miguel255149 25.33
156 Mnatsakanian, Eduard A255175 52.32
157 Kindermann, Stefan255048 31.26
158 Sorokin, Maxim255053 23.19
159 Machulsky, Anatoly D255055 34.52
160 Malaniuk, Vladimir P255049 33.69
161 Nogueiras, Jesus255049 31.70
162 Rashkovsky, Nukhim N254951 44.95
163 Malisauskas, Vidmantas254954 27.66
164 Kavalek, Lubomir254965 47.64
165 Zhuravliov, Valerij254866 52.30
166 Khenkin, Igor254853 23.03
167 Lautier, Joel254849 17.96
168 Zapata, Alonso254849 32.61
169 Magerramov, Elmar S254854 32.97
170 Stohl, Igor254749 26.51
171 Lanka, Zigurds254756 30.86
172 Wolff, Patrick G254750 23.13
173 Mokrý, Karel254750 32.15
174 Minasian, Artashes254754 24.19
175 Averkin, Orest N254765 47.10
176 Xie Jun254567 20.42
177 Frolov, Artur254558 20.67
178 Shabalov, Alexander254552 23.55
179 Zagrebelny, Sergey254567
180 Granda Zuńiga, Julio E254452 24.10
181 Kupreichik, Viktor D254451 41.74
182 Tseshkovsky, Vitaly V254451 46.52
183 Ikonnikov, Vyacheslav254358 25.04
184 Bönsch, Uwe254250 32.46
185 Kuporosov, Viktor254160 29.51
186 Georgadze, Tamaz V254162 43.39
187 Fedorowicz, John P254149 32.51
188 Arkhipov, Sergey254054 36.77
189 Xu Jun254056 28.54
190 Kholmov, Ratmir D254051 65.88
191 Petrienko, Vladimir253965 36.06
192 Didishko, Vereslav253967 41.97
193 Arbakov, Valentin253860 39.18
194 Spraggett, Kevin B253849 36.39
195 Hellers, Ferdinand253849 22.18
196 Bologan, Viktor253769 19.30
197 Polgar, Zsuzsa253749 21.94
198 Gurevich, Ilya253762 19.15
199 Kovacevic, Vladimir253652 49.01
200 Kalinitschew, Sergey253665 35.16
201 Gleizerov, Evgeny253657 28.03
202 Karpman, Vadim253659 25.88
203 Wilder, Michael253556 28.54
204 Zlotnik, Boris A253565 44.46
205 Sosonko, Gennadi253454 47.87
206 Fominyh, Alexander253456 31.79
207 Velimirovic, Dragoljub253351 48.88
208 King, Daniel J253248 27.59
209 Arnason, Jon L253250 30.38
210 Khmelnitsky, Igor N253168 22.61
211 Palac, Mladen253155 20.12
212 Mikhalchishin, Adrian B253151 36.37
213 Sher, Miron N253152 38.76
214 Cvitan, Ognjen253050 29.47
215 Milos, Gilberto253052 27.42
216 Sherbakov, Ruslan252954 21.55
217 Novik, Maxim252968 27.30
218 Quinteros, Miguel A252956 43.26
219 Donchev, Dimitar I252957 32.69
220 Ivanov, Alexander V252851 34.91
221 Chudinovskih, Alexander252871 24.05
222 Uhlmann, Wolfgang252750 56.01
223 Bagirov, Vladimir K252653 54.62
224 Greenfeld, Alon252655 26.95
225 Rachels, Stuart252657 21.51
226 Bikhovsky, Avigdor I252656 36.07
227 Guseinov, Aidyn252661 39.25
228 Darga, Klaus V252670 57.10
229 Najdorf, Miguel252566 80.95
230 Wojtkiewicz, Aleksander252548 28.21
231 Vitolinš, Alvis252563 44.79
232 Gruenberg, Hans Ulrich252551 35.23
233 Tseitlin, Mikhail S252551 43.79
234 Savchenko, Stanislav252359 24.19
235 Panchenko, Alexander N252252 37.49
236 Hertneck, Gerald252252 27.54
237 Wang Zili252259 22.80
238 Lukin, Andrei M252155 42.59
239 Cámpora, Daniel H252150 33.75
240 Browne, Walter S252151 42.22
241 Chiburdanidze, Maia G252151 30.20
242 Pfleger, Helmut252059 47.65
243 Oblitas Guerrero, Carlomagno251965
244 Faragó, Iván251950 44.99
245 Ivanovic, Božidar251951 44.60
246 Janjgava, Lasha251954 20.90
247 Anikaev, Yury251966 42.76
248 Gofshtein, Leonid D251973 37.94
249 Kishnev, Sergey251862 34.41
250 Kochiev, Alexander251853 35.02
251 Tseitlin, Mark D251767 47.52
252 Marin, Mihail251653 25.94
253 Varavin, Viktor251660 23.86
254 Henley, Ron W251570 34.32
255 Plaskett, Jim251555 31.04
256 Zhidkov, Valery S251458 51.57
257 Tunik, Gennady251456 37.84
258 Belov, Igor251457
259 Hansen, Lars Bo251349 22.52
260 Matulovic, Milan251358 55.81
261 Tischbierek, Raj251251 28.52
262 Bischoff, Klaus251248 29.81
263 Gipslis, Aivars251162 54.15
264 Dizdar, Goran251152 32.32
265 Bass, Leonid251157 33.84
266 Lau, Ralf251051 31.45
267 Sellos, Didier251065 34.11
268 Djuric, Stefan251052 35.68
269 Timoshenko, Georgy251052 24.83
270 Anastasian, Ashot250953 26.71
271 Spasov, Vasil250952 20.12
272 Ye Rongguang250953 27.49
273 Loginov, Valery A250953 35.30
274 Rodriguez, Amador250950 34.56
275 Cifuentes Parada, Roberto250853 33.28
276 Horvath, Jozsef250850 26.63
277 Rechlis, Gad250855 24.15
278 Makarov, Marat250859 27.90
279 Magomedov, Magaram250757 24.86
280 Gheorghiu, Florin250751 46.98
281 Cramling, Pia250750 27.93
282 Vukic, Milan250752 47.62
283 Arencibia, Walter250650 23.69
284 Palatnik, Semen A250655 41.01
285 Nikolenko, Oleg250664 31.78
286 Kosten, Anthony C250449 32.69
287 Panno, Oscar R250452 56.04
288 Kosic, Dragan250461 21.13
289 Cebalo, Mišo250451 46.15
290 Murey, Yakov250454 49.66
291 Simic, Radoslav250356 42.81
292 Petkevich, Jusefs250362 50.28
293 Zakharov, Alexander V250369 47.48
294 Yuneev, Alexey250359
295 Kurtenkov, Atanas250368 27.66
296 Kallai, Gabor250356 32.11
297 Gufeld, Eduard E250262 55.03
298 Georgiev, Krum250252 32.85
299 Watson, William N250249 28.95
300 Schoenthier, Frank250269 32.37
301 Rivas Pastor, Manuel250256 30.72
302 Rodriguez Vargas, Orestes250257 47.74
303 Kotronias, Vasilios250150 26.60
304 Basin, Leonid250165 33.36
305 Duer, Arne250063 31.72
306 Veingold, Aleksander250059 37.47
307 Yuferov, Sergey N250056 45.33
308 Ardiansyah, Haji249962 39.32
309 Gurevich, Vladimir249961 31.66
310 Moiseev, Viktor249969 31.88
311 Klinger, Josef249950 23.82
312 Zaichik, Gennady L249852 34.14
313 Liberzon, Vladimir M249866 54.02
314 Ernst, Thomas249851 30.62
315 Karlsson, Lars249852 35.72
316 Ivanov, Igor V249853 44.23
317 Dimitrov, Vladimir249756 22.96
318 Yrjola, Jouni249651 31.44
319 Nikolac, Juraj249667 58.94
320 Lima, Darcy249661 28.86
321 Titov, German249658 27.92
322 Meister, Yakov249662 35.55
323 Beim, Valery249662 41.04
324 Popchev, Milko249657 26.39
325 Polgar, Judit249550 14.69
326 Mainka, Romuald249551 27.88
327 Petrosian, Arshak B249451 37.29
328 Bronstein, David I249457 67.12
329 Rubinetti, Jorge A249458 45.99
330 Foisor, Ovidiu249360 31.98
331 Tabatadze, Tamaz249367 23.00
332 Dzuban, Oleg I249365
333 Kiselev, Sergey249253 29.55
334 Tolnai, Tibor249250 26.52
335 Bukic, Enver249172 53.33
336 Soppe, Guillermo249154 30.54
337 Stoica, Valentin249175 41.13
338 Sunye Neto, Jaime249151 33.91
339 Moskalenko, Viktor249151 30.32
340 Savon, Vladimir A249152 50.51
341 Magem Badals, Jordi249052 23.60
342 Gaprindashvili, Nona248958 49.91
343 Meduna, Eduard248952 40.55
344 Shipov, Sergei248974 24.95
345 Hickl, Joerg248850 25.95
346 Renet, Olivier248750 26.28
347 Espig, Lutz248752 42.24
348 García Gonzáles, Guillermo248757 37.31
349 Annageldyev, Orazly248668 31.03
350 Inkiov, Ventzislav248650 34.87
351 Ekstroem, Roland248664 34.86
352 Marjanovic, Slavoljub248653 36.23
353 Barbulescu, Dan248675 26.77
354 Csom, István248551 50.83
355 Todorcevic, Miodrag248549 50.39
356 Zlochevskij, Alexander248563 27.77
357 Frias, Victor J248554 35.14
358 Ornstein, Axel248562 38.93
359 Jansa, Vlastimil248550 48.34
360 Thorsteins, Karl248454 26.47
361 Piskov, Yury248456 29.47
362 Moroz, Alexander248461 30.20
363 Brunner, Lucas248448 23.84
364 Rytshagov, Mikhail248360 23.38
365 Van der Sterren, Paul248349 35.04
366 Andrianov, Nikolai248365 29.28
367 Barlov, Dragan248351 34.17
368 Vogt, Lothar H248351 39.20
369 Haba, Petr248352 26.23
370 Ermenkov, Evgenij248250 41.51
371 Hector, Jonny248249 27.13
372 Komarov, Dimitri248259 22.33
373 Doroshkievich, Vladimir K248264 53.26
374 Godena, Michele248156 23.75
375 Solozhenkin, Evgeniy248161 24.67
376 Vera, Reynaldo248153 30.23
377 Brenninkmeijer, Joris248151 21.55
378 Mochalov, Evgeny V248164 39.42
379 Lein, Anatoly248154 60.01
380 Ghinda, Mihail Viorel248158 41.68
381 Schmittdiel, Eckhard248150 30.88
382 Khasin, Alexander248161 39.92
383 Unzicker, Wolfgang248053 65.76
384 Franco Ocampos, Zenon248050 34.88
385 Cabrilo, Goran248051 32.75
386 Vorotnikov, Vladislav V248061 43.62
387 Ionescu, Constantin247955 32.55
388 Romero Holmes, Alfonso247951 25.84
389 Sahovic, Dragutin247965 50.65
390 Tisdall, Jonathan D247950 32.60
391 Reshevsky, Samuel H247963 79.35
392 Gallagher, Joseph G247849 26.91
393 Rausis, Igors247856 29.98
394 Edelman, Daniel247861 22.09
395 Groszpeter, Attila247849 30.81
396 Podzielny, Karl Heinz247864 36.56
397 Fishbein, Alexander247752 22.90
398 Efimov, Igor247763 30.54
399 Schussler, Harry247654 33.77
400 Gruenfeld, Yehuda247655 35.09
401 Kouatly, Bachar247656 33.08
402 Kosashvili, Yona247658 20.74
403 Garcia Palermo, Carlos247553 37.33
404 Klundt, Klaus247568 49.27
405 Reeh, Oliver247552 27.20
406 Barbero, Gerardo F247450 29.61
407 Mirkovic, Slobodan247463 32.68
408 Schlosser, Philipp247450 22.62
409 Kuczynski, Robert247451 24.95
410 Hebden, Mark247351 33.13
411 Tempone, Marcelo247357 28.57
412 Womacka, Mathias247362 24.76
413 Rajkovic, Dusan247351 48.79
414 Pekarek, Ales247256 29.29
415 Zhelnin, Vladimir V247261 44.05
416 Filipenko, Alexander V247264 42.07
417 Prandstetter, Eduard247256 42.29
418 Sideif Sade, Fikret I247262 39.25
419 Lin Ta247158 28.17
420 Poluljahov, Aleksandr247160 25.82
421 Zezulkin, Jurij247166 19.62
422 Mednis, Edmar J247154 54.02
423 Lukacs, Peter247149 40.73
424 Sadler, Matthew247154 16.88
425 Beshukov, Sergei247157 19.99
426 Gomez Baillo, Jorge H247056 31.94
427 Bruk, Ofer247060 23.22
428 Shmuter, Leonid247068 21.91
429 Kraidman, Yair247065 58.41
430 Kapetanovic, Armin246959
431 Moldobaev, Emelbek246966
432 Urday, Henry246956 23.74
433 Semkov, Semko246958 31.09
434 Temirbaev, Serik246862
435 Ivkov, Borislav246853 57.38
436 Abramovic, Boško246851 40.13
437 Bellon Lopez, Juan Manuel246752 40.90
438 Budnikov, Alexandar246756 24.18
439 Hazai, Laszlo246755 37.80
440 Saltaev, Mihail246769 28.37
441 Ginsburg, Gennadij246771 19.64
442 Atalik, Suat246660 26.47
443 Anic, Darko246659 33.92
444 Stangl, Markus246650 21.92
445 Norwood, David246555 22.49
446 Flear, Glenn C246549 32.13
447 Milov, Leonid246573 25.15
448 Martynov, Pavel246569 23.25
449 Mukhametov, Eldar246561 21.86
450 Adianto, Utut246554 26.04
451 Kolev, Atanas246553 23.71
452 Drasko, Milan246552 28.32
453 Finegold, Benjamin246452 21.57
454 Legky, Nikolay A246358 35.96
455 Ivanov, V.246374
456 Gligoric, Svetozar246353 68.16
457 Gurgenidze, Bukhuti I246369 57.38
458 Schmidt, Wlodzimierz246250 47.97
459 Vehi Bach, Victor Manuel246256
460 Dizdarevic, Emir246253 32.99
461 Conquest, Stuart246249 24.08
462 Ostenstad, Berge246150 26.54
463 Mohr, Stefan246150 23.44
464 Gonzalez, JA.246165
465 Kirov Ivanov, Nino246154 45.56
466 Davies, Nigel R246150 30.67
467 Castro Rojas, Oscar Humberto246057 37.90
468 Perovic, Dragan246070
469 Antunes, Antonio245951 29.15
470 Brooks, Michael A245959 29.95
471 Johansen, Darryl K245958 32.16
472 Kantsler, Boris245958 28.95
473 Knezevic, Milorad245954 54.42
474 Mozes, Ervin245870 45.24
475 Byrne, Robert E245859 62.94
476 Rukavina, Josip245864 48.34
477 Hresc, Vladimir245867 39.36
478 Nasybullin, Vladislav245872
479 Lanc, Alois245757 43.12
480 Fernandez Garcia, Jose Luis245753 36.91
481 Ivanov, Sergey245759 29.51
482 Badea, Bela245663 22.11
483 Zilberstein, Valery I245674 47.96
484 Strikovic, Aleksa245652 29.88
485 Kozlov, V.245674
486 Lagunow, Alexander245569 23.71
487 Filipovic, Branko245559 33.48
488 Pichler, Juergen245565 29.83
489 Blatny, Pavel245551 22.77
490 Howell, James C245552 23.87
491 Levitt, Jonathan245551 27.83
492 Galdunts, Sergey245456 26.20
493 Renman, Nils Gustaf245473
494 Levin, Felix245367 32.40
495 Lechtynsky, Jiri245356 43.35
496 Ilincic, Zlatko245252 22.89
497 Nikolic, Zivoslav245255 37.30
498 Giardelli, Sergio C245263 35.76
499 Ree, Hans245256 46.54
500 Thorhallsson, Throstur245258 22.03

These ratings, calculated as of March 31, 1991, incorporate all games (against rated opponents) played in the time between April 1, 1990 and March 31, 1991, along with the ratings that were already calculated as of March 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 March 31, 1991. This represents the player's estimated strength on April 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 April 1, 1991. The +/- value represents the standard deviation of that estimate; the player's true strength on April 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 April 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 March 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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