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Top 10 active players as of March 31, 1990

  #  

Player Rating +/-
1 Kasparov, Garry K285948
2 Karpov, Anatoly E279748
3 Ivanchuk, Vassily272749
4 Timman, Jan H271248
5 Salov, Valery B271050
6 Gelfand, Boris270149
7 Gurevich, Mikhail N268349
8 Korchnoi, Viktor L268047
9 Short, Nigel D267647
10 Ehlvest, Jaan267648

About these ratings

Top 500 active players as of March 31, 1990

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28594878.6% #126.96
2 Karpov, Anatoly E27974817.0% #338.86
3 Ivanchuk, Vassily2727491.3% #1521.04
4 Timman, Jan H2712480.6% #2138.30
5 Salov, Valery B2710500.7% #2225.85
6 Gelfand, Boris2701490.4% #2721.77
7 Gurevich, Mikhail N2683490.1% #3831.11
8 Korchnoi, Viktor L2680470.1% #3959.02
9 Short, Nigel D2676470.1% #4324.83
10 Ehlvest, Jaan2676480.1% #4427.46
11 Beliavsky, Alexander G2672480.1% #4736.29
12 Yudasin, Leonid G2668500.1% #5130.65
13 Andersson, Ulf266848 #5038.76
14 Dolmatov, Sergey V2666490.1% #5231.11
15 Khalifman, Alexander2665490.1% #5324.20
16 Nunn, John D M266248 #5534.93
17 Lputian, Smbat G265949 #5932.13
18 Speelman, Jonathan S265948 #5933.50
19 Ribli, Zoltán265449 #6338.57
20 Vaganian, Rafael A265448 #6238.46
21 Jussupow, Artur M265348 #6430.13
22 Seirawan, Yasser265348 #6430.02
23 Dreev, Alexey265149 #6721.20
24 Polugaevsky, Lev A265050 #6855.36
25 Gavrikov, Victor N264950 #6832.67
26 Dautov, Rustem264851 #7124.34
27 Tal, Mikhail264749 #7153.39
28 Bareev, Evgeny264750 #7223.36
29 Portisch, Lajos264548 #7252.98
30 Hübner, Robert264349 #7441.40
31 Agdestein, Simen264350 #7622.88
32 Vyzmanavin, Alexey264151 #7830.25
33 Vladimirov, Evgeny Y264052 #7933.20
34 Nikolic, Predrag263848 #8029.55
35 Yurtaev, Leonid263852 #8330.91
36 Sokolov, Andrey Y263649 #8227.03
37 Aseev, Konstantin N263650 #8429.45
38 Ljubojevic, Ljubomir263448 #8439.41
39 Christiansen, Larry M263450 #8533.76
40 Sax, Gyula263248 #8638.79
41 Chernin, Alexander M262949 #8930.07
42 Razuvaev, Yury S262950 #9044.47
43 Shirov, Alexei262750 #9317.74
44 Tukmakov, Vladimir B262549 #9444.04
45 Miles, Anthony J262548 #9434.93
46 Balashov, Yury S262348 #9541.05
47 Dzindzichashvili, Roman Y262352 #9845.90
48 Gulko, Boris F262349 #9643.14
49 Oll, Lembit262150 #9923.93
50 Sveshnikov, Evgeny E262051 #10240.14
51 Azmaiparashvili, Zurab A262049 #10130.04
52 Epishin, Vladimir262050 #10124.72
53 Dorfman, Iosif D261652 #10837.91
54 Dvoiris, Semen I261650 #10631.41
55 Timoshchenko, Gennady261451 #10840.92
56 Eingorn, Viacheslav S261049 #11133.35
57 Smirin, Ilia260950 #11322.19
58 Georgiev, Kiril260850 #11424.34
59 Psakhis, Lev B260848 #11331.34
60 Anand, Viswanathan260750 #11520.30
61 Pigusov, Evgeny260652 #11828.99
62 deFirmian, Nicholas E260649 #11732.68
63 Goldin, Alexander260350 #12025.09
64 Hort, Vlastimil260349 #12046.22
65 Novikov, Igor A260251 #12227.86
66 Rozentalis, Eduardas260151 #12326.84
67 Tiviakov, Sergei260056 #12817.13
68 Romanishin, Oleg M260048 #12238.22
69 Ivanov, Alexander V259952 #12533.91
70 Lerner, Konstantin Z259950 #12540.09
71 Kruppa, Yuri259854 #12825.78
72 Panchenko, Alexandar G259871 #14028.97
73 Hansen, Curt259449 #12925.54
74 Smyslov, Vassily V259450 #13069.02
75 Hjartarson, Jóhann259348 #13027.15
76 Dokhoian, Yury259250 #13325.43
77 Fedorowicz, John P259249 #13231.51
78 Todorcevic, Miodrag259150 #13249.39
79 Makarichev, Sergey Y259152 #13536.37
80 Yermolinsky, Alex V259155 #13731.96
81 Kamsky, Gata259153 #13715.83
82 Ftácnik, Lubomír258948 #13532.42
83 Cherepkov, Alexander V258776 #15569.42
84 Kharitonov, Andrey Y258750 #13830.98
85 Pétursson, Margeir258748 #13630.13
86 van der Wiel, John T H258747 #13730.64
87 Rashkovsky, Nukhim N258552 #14143.95
88 Vasiukov, Evgeny A258550 #14057.07
89 Krasenkow, Michal258450 #14126.38
90 Kramnik, Vladimir258360 #14814.77
91 Kovalev, Andrei258358 #14828.40
92 Nogueiras, Jesus258249 #14230.70
93 Malaniuk, Vladimir P258248 #14232.69
94 Yakovich, Yuri258253 #14527.34
95 Panchenko, Alexander N258253 #14536.49
96 Spraggett, Kevin B258151 #14435.39
97 Akopian, Vladimir258150 #14418.32
98 Sturua, Zurab258066 #15530.81
99 Spassky, Boris V258049 #14453.17
100 Adams, Michael258049 #14418.37
101 Tseshkovsky, Vitaly V257950 45.52
102 Giorgadze, Giorgi257753 25.47
103 Sokolov, Ivan257750 21.80
104 Shabanov, Yury F257763 52.39
105 Smagin, Sergey257749 31.56
106 Neverov, Valery257752 25.78
107 Kveinys, Aloyzas257659 27.73
108 Smejkal, Jan257650 44.02
109 Taimanov, Mark E257656 64.15
110 Vaulin, Alexander257568 33.04
111 Chekhov, Valery A257550 34.34
112 Kengis, Edvins257453 30.96
113 Ulibin, Mikhail257451 18.83
114 Ubilava, Elizbar E257351 39.59
115 Chandler, Murray G257349 29.98
116 Shneider, Aleksandr257157 27.86
117 Olafsson, Helgi257150 33.63
118 Kuzmin, Gennady P257053 44.20
119 Dlugy, Maxim257049 24.17
120 Khenkin, Igor256853 22.03
121 Larsen, Bent256850 55.07
122 Hulak, Krunoslav256851 38.85
123 Torre, Eugenio256752 38.41
124 Bikhovsky, Avigdor I256662 35.07
125 Kurajica, Bojan256661 42.38
126 Mestel, A Jonathan256656 33.05
127 Glek, Igor V256452 28.40
128 Huzman, Alexander256353 27.97
129 Palac, Mladen256355 19.12
130 Velimirovic, Dragoljub256150 47.88
131 Soppe, Guillermo256062 29.54
132 Morovic Fernández, Iván E255956 27.02
133 Janjgava, Lasha255954 19.90
134 Gorelov, Sergey G255963 32.62
135 Popovic, Petar255749 31.13
136 Kuzmin, Alexey255754 27.06
137 Benjamin, Joel L255649 26.05
138 Pintér, József255652 36.39
139 Sosonko, Gennadi255653 46.87
140 Ionov, Sergey255564 28.23
141 Hodgson, Julian M255448 26.68
142 Kochiev, Alexander255452 34.02
143 Donchev, Dimitar I255356 31.69
144 Kavalek, Lubomir255363 46.64
145 Suba, Mihai255251 42.83
146 Tischbierek, Raj255152 27.52
147 Quinteros, Miguel A255166 42.26
148 Sorokin, Maxim255154 22.19
149 Mikhalchishin, Adrian B255050 35.37
150 Vaisser, Anatoli255050 41.07
151 Magerramov, Elmar S255052 31.97
152 Kindermann, Stefan255048 30.26
153 Anikaev, Yury254969 41.76
154 Cvitan, Ognjen254849 28.47
155 Timoshenko, Georgy254853 23.83
156 Kudrin, Sergey254850 30.57
157 Najdorf, Miguel254867 79.95
158 Petrienko, Vladimir254763 35.06
159 Mnatsakanian, Eduard A254768 51.32
160 Adorján, András254751 39.99
161 Kholmov, Ratmir D254751 64.88
162 Rohde, Michael A254653 30.60
163 Zhuravliov, Valerij254663 51.30
164 Browne, Walter S254651 41.22
165 Kuporosov, Viktor254667 28.51
166 Bönsch, Uwe254551 31.46
167 Kalinitschew, Sergey254562 34.16
168 Ruban, Vadim254454 25.80
169 Ye Rongguang254459 26.49
170 Cebalo, Mišo254450 45.15
171 Lalic, Bogdan254450 26.06
172 Orlov, Georgi254459
173 Kaidanov, Gregory S254252 30.47
174 Milos, Gilberto254254 26.42
175 King, Daniel J254149 26.59
176 Frolov, Artur254157 19.67
177 Khmelnitsky, Igor N254061 21.61
178 Geller, Efim P254051 65.08
179 Ye Jiangchuan254059 29.36
180 Uhlmann, Wolfgang254052 55.01
181 Damljanovic, Branko253948 28.79
182 Rogers, Ian253950 29.77
183 Lanka, Zigurds253856 29.86
184 Zagrebelny, Sergey253863
185 Wilder, Michael253752 27.54
186 Rachels, Stuart253658 20.51
187 Serper, Grigory253654 20.55
188 Panno, Oscar R253653 55.04
189 Csom, István253550 49.83
190 Arkhipov, Sergey253459 35.77
191 Bass, Leonid253460 32.84
192 Minasian, Artashes253454 23.19
193 Marin, Mihail253353 24.94
194 Moskalenko, Viktor253351 29.32
195 Knaak, Rainer F253351 37.04
196 Wahls, Matthias253349 22.18
197 Machulsky, Anatoly D253258 33.52
198 Wojtkiewicz, Aleksander253251 27.21
199 Sher, Miron N253254 37.76
200 Greenfeld, Alon253252 25.95
201 Rodriguez, Amador253250 33.56
202 Duer, Arne253265 30.72
203 Naumkin, Igor253156 24.64
204 Zapata, Alonso253151 31.61
205 Groszpeter, Attila253150 29.81
206 Lobron, Eric253149 29.90
207 Gheorghiu, Florin253051 45.98
208 Vorotnikov, Vladislav V252965 42.62
209 Karpman, Vadim252955 24.88
210 Savchenko, Stanislav252855 23.19
211 Chudinovskih, Alexander252870 23.05
212 Arnason, Jon L252850 29.38
213 Darga, Klaus V252864 56.10
214 Illescas Cordoba, Miguel252850 24.33
215 Alburt, Lev O252752 44.61
216 Ivanovic, Božidar252750 43.60
217 Horvath, Jozsef252649 25.63
218 Mokrý, Karel252651 31.15
219 Vitolinš, Alvis252658 43.79
220 Brodsky, Michail252660 21.01
221 Kožul, Zdenko252549 23.86
222 Kishnev, Sergey252563 33.41
223 Lukin, Andrei M252553 41.59
224 London, Dimitri252471 27.36
225 Barua, Dibyendu252456 23.43
226 Bagirov, Vladimir K252351 53.62
227 Bischoff, Klaus252249 28.81
228 Zlotnik, Boris A252262 43.46
229 Komarov, Dimitri252260 21.33
230 Georgadze, Tamaz V252263 42.39
231 Chiburdanidze, Maia G252252 29.20
232 Karlsson, Lars252151 34.72
233 Hebden, Mark252150 32.13
234 Arbakov, Valentin252060 38.18
235 Pfleger, Helmut252056 46.65
236 Espig, Lutz251957 41.24
237 Tseitlin, Mark D251960 46.52
238 Kovacevic, Vladimir251951 48.01
239 Magomedov, Magaram251955 23.86
240 Gruenfeld, Yehuda251953 34.09
241 Dizdar, Goran251952 31.32
242 Vera, Reynaldo251852 29.23
243 Sellos, Didier251859 33.11
244 Malisauskas, Vidmantas251854 26.66
245 Cámpora, Daniel H251850 32.75
246 Veingold, Aleksander251765 36.47
247 Anastasian, Ashot251752 25.71
248 Rausis, Igors251756 28.98
249 Baburin, Alexander251763 23.12
250 Murey, Yakov251751 48.66
251 Meshkov, Yuri A251772 40.20
252 Meister, Peter251657 23.77
253 Lin Ta251663 27.17
254 Savon, Vladimir A251654 49.51
255 Kiselev, Sergey251553 28.55
256 Unzicker, Wolfgang251456 64.76
257 Inkiov, Ventzislav251450 33.87
258 Gufeld, Eduard E251456 54.03
259 Gofshtein, Leonid D251469 36.94
260 Marjanovic, Slavoljub251452 35.23
261 Yuneev, Alexey251254
262 Hellers, Ferdinand251149 21.18
263 Kosic, Dragan251157 20.13
264 Polgar, Zsuzsa251149 20.94
265 Meyer, E.251172
266 Petrosian, Arshak B251150 36.29
267 Faragó, Iván251049 43.99
268 Adianto, Utut251065 25.04
269 Palatnik, Semen A251054 40.01
270 Gipslis, Aivars250960 53.15
271 Graf, Alexander250960 27.60
272 Piket, Jeroen250948 21.18
273 Rodriguez Vargas, Orestes250857 46.74
274 Barbero, Gerardo F250851 28.61
275 Foisor, Ovidiu250759 30.98
276 Govedarica, Radovan250768 42.13
277 Vogt, Lothar H250752 38.20
278 Renet, Olivier250749 25.28
279 Gruenberg, Hans Ulrich250750 34.23
280 Frias, Victor J250560 34.14
281 Mainka, Romuald250552 26.88
282 Moroz, Alexander250557 29.20
283 Lau, Ralf250450 30.45
284 Loginov, Valery A250463 34.30
285 Kallai, Gabor250353 31.11
286 Basin, Leonid250358 32.36
287 Ghinda, Mihail Viorel250358 40.68
288 Meduna, Eduard250350 39.55
289 Stoica, Valentin250372 40.13
290 Belov, Igor250357
291 Kupreichik, Viktor D250249 40.74
292 Shabalov, Alexander250153 22.55
293 Gleizerov, Evgeny250163 27.03
294 Franco Ocampos, Zenon250152 33.88
295 Watson, William N250149 27.95
296 Xu Jun250157 27.54
297 Vukic, Milan250155 46.62
298 Klinger, Josef250050 22.82
299 Liberzon, Vladimir M250059 53.02
300 Lautier, Joel249949 16.96
301 Wolff, Patrick G249951 22.13
302 Georgiev, Krum249951 31.85
303 Ivanov, Igor V249853 43.23
304 Nikolac, Juraj249860 57.94
305 Zaichik, Gennady L249851 33.14
306 Van der Sterren, Paul249849 34.04
307 Djuric, Stefan249851 34.68
308 Jansa, Vlastimil249751 47.34
309 Guseinov, Aidyn249763 38.25
310 Sherbakov, Ruslan249658 20.55
311 Rechlis, Gad249654 23.15
312 Ivkov, Borislav249654 56.38
313 Kosten, Anthony C249649 31.69
314 Reyes, Juan249562 26.92
315 Yrjola, Jouni249552 30.44
316 Gligoric, Svetozar249552 67.16
317 Tseitlin, Mikhail S249452 42.79
318 Tolnai, Tibor249450 25.52
319 Hertneck, Gerald249454 26.54
320 Piskov, Yury249455 28.47
321 Gaprindashvili, Nona249457 48.91
322 Andrianov, Nikolai249374 28.28
323 Hickl, Joerg249350 24.95
324 Stohl, Igor249350 25.51
325 Schmittdiel, Eckhard249351 29.88
326 Hansen, Lars Bo249348 21.52
327 Lukacs, Peter249250 39.73
328 Granda Zuńiga, Julio E249152 23.10
329 Lein, Anatoly249055 59.01
330 Skembris, Spyridon249051 32.11
331 Cramling, Pia249051 26.93
332 Ziatdinov, Raset248969 31.26
333 Antunes, Antonio248954 28.15
334 Petkevich, Jusefs248962 49.28
335 Dzuban, Oleg I248965
336 García Gonzáles, Guillermo248952 36.31
337 Ekstroem, Roland248858 33.86
338 Simic, Radoslav248857 41.81
339 Ree, Hans248854 45.54
340 Ninov, Kiril248855 21.48
341 Barbulescu, Dan248866 25.77
342 Tunik, Gennady248756 36.84
343 Bronstein, David I248753 66.12
344 Motwani, Paul248755 27.80
345 Kotronias, Vasilios248751 25.60
346 Dimitrov, Vladimir248756 21.96
347 Sahovic, Dragutin248762 49.65
348 Barlov, Dragan248650 33.17
349 Makarov, Marat248556 26.90
350 Matulovic, Milan248560 54.81
351 Ornstein, Axel248562 37.93
352 Rivas Pastor, Manuel248553 29.72
353 Popchev, Milko248454 25.39
354 Ionescu, Constantin248455 31.55
355 Mochalov, Evgeny V248471 38.42
356 Rubinetti, Jorge A248459 44.99
357 Filipenko, Alexander V248470 41.07
358 Davies, Nigel R248449 29.67
359 Meister, Yakov248358 34.55
360 Gutman, Lev248351 44.51
361 Tisdall, Jonathan D248351 31.60
362 Mortensen, Erling248250 34.98
363 Strikovic, Aleksa248252 28.88
364 Brooks, Michael A248266 28.95
365 Sideif Sade, Fikret I248165 38.25
366 Drasko, Milan248150 27.32
367 Wedberg, Tom248150 36.35
368 Norwood, David248054 21.49
369 Thorhallsson, Throstur248057 21.03
370 Plaskett, Jim248053 30.04
371 Mascarinas, Rico247956 37.08
372 Kantsler, Boris247956 27.95
373 Blatny, Pavel247949 21.77
374 Kolev, Atanas247956 22.71
375 Flear, Glenn C247849 31.13
376 Novik, Maxim247869 26.30
377 Hazai, Laszlo247853 36.80
378 Schussler, Harry247851 32.77
379 Ernst, Thomas247850 29.62
380 Rajkovic, Dusan247852 47.79
381 Zilberman, Nathan R247758 49.91
382 Khasin, Alexander247760 38.92
383 Klundt, Klaus247761 48.27
384 Stanojevic, Branko247773 47.24
385 Tabatadze, Tamaz247668 22.00
386 Varavin, Viktor247667 22.86
387 Thorsteins, Karl247552 25.47
388 Wang Zili247460 21.80
389 Sadler, Matthew247457 15.88
390 Brunner, Lucas247449 22.84
391 Pekarek, Ales247453 28.29
392 Averbakh, Yury L247370 68.15
393 Kogan, Boris247371
394 Trapl, Jindrich247369 48.02
395 Saltaev, Mihail247266 27.37
396 Byrne, Robert E247259 61.94
397 Bruk, Ofer247255 22.22
398 Finegold, Benjamin247255 20.57
399 Kouatly, Bachar247252 32.08
400 Reeh, Oliver247256 26.20
401 Efimov, Igor247262 29.54
402 Abramovic, Boško247150 39.13
403 Kharlov, Andrei247168 21.36
404 Sznapik, Aleksander247150 39.14
405 Nikolenko, Oleg247163 30.78
406 Mednis, Edmar J247053 53.02
407 Lima, Darcy247060 27.86
408 Ledger, Andrew247063 20.86
409 Arkell, Keith C246952 29.23
410 Ikonnikov, Vyacheslav246966 24.04
411 Reshevsky, Samuel H246959 78.35
412 Nemet, Ivan246955 46.96
413 Szekely, Peter246954 35.15
414 Lutz, Christopher246954 19.10
415 Mirkovic, Slobodan246965 31.68
416 Kuczynski, Robert246849 23.95
417 Martin del Campo, Roberto246859
418 Djurhuus, Rune246754 20.18
419 Gurevich, Vladimir246760 30.66
420 Dizdarevic, Emir246751 31.99
421 Schmidt, Wlodzimierz246749 46.97
422 Titov, German246759 26.92
423 Yuferov, Sergey N246762 44.33
424 Prandstetter, Eduard246654 41.29
425 Padevsky, Nikola B246661 56.84
426 Zilberstein, Valery I246671 46.96
427 Murshed, Niaz246557 23.88
428 Gurgenidze, Bukhuti I246561 56.38
429 Kozlov, V.246465
430 Godena, Michele246466 22.75
431 Seret, Jean Luc246461
432 Knezevic, Milorad246356 53.42
433 Tempone, Marcelo246356 27.57
434 Lendwai, Reinhard246360 23.47
435 Dueball, Juergen246371 45.01
436 Haba, Petr246251 25.23
437 Braga, Fernando246257 31.73
438 Cabrilo, Goran246152 31.75
439 Horváth, Csaba246151 21.82
440 Gallagher, Joseph G246050 25.91
441 Pytel, Krzysztof246060 44.88
442 Lombardy, William J246075 52.32
443 Ostermeyer, Peter245963 46.47
444 Moldobaev, Emelbek245961
445 Ioseliani, Nana245957 28.13
446 Negulescu, Adrian245963 28.81
447 Filipovic, Branko245958 32.48
448 Kirov Ivanov, Nino245952 44.56
449 Zhelnin, Vladimir V245961 43.05
450 Lukov, Valentin245854 34.30
451 Yailjan, M.245866
452 Rukavina, Josip245863 47.34
453 Dutreeuw, Marc245760 30.11
454 Pichler, Juergen245759 28.83
455 Polgar, Judit245752 13.69
456 Raicevic, Momcilo245661
457 Zhidkov, Valery S245664 50.57
458 Akhmilovskaya, Elena245664
459 Hausner, Ivan245654 37.95
460 Renman, Nils Gustaf245664
461 Staniszewski, Piotr245658 23.57
462 Kuijf, Marinus245551 30.13
463 Temirbaev, Serik245561
464 Marangunic, Srdjan245572 46.42
465 Zelcic, Robert245568 24.53
466 Levin, Felix245560 31.40
467 Beshukov, Sergei245571 18.99
468 Krnic, Zdenko245464 42.50
469 Tringov, Georgy P245461 53.07
470 Vilela, Jose Luis245461 37.03
471 Kraidman, Yair245464 57.41
472 Gonzalez, JA.245473
473 Legky, Nikolay A245455 34.96
474 Mukhametov, Eldar245367 20.86
475 Ermenkov, Evgenij245353 40.51
476 Karolyi, Tibor Jr245354 28.38
477 Shmuter, Leonid245370 20.91
478 Gostisa, Leon245355 28.99
479 Velikov, Petar245351 39.00
480 Anic, Darko245364 32.92
481 Servat, Roberto245261 22.15
482 Lanc, Alois245255 42.12
483 Nijboer, Friso245252 24.85
484 Cifuentes Parada, Roberto245256 32.28
485 Mohr, Georg245255 25.16
486 Levitt, Jonathan245151 26.83
487 Bergstrom, Christer245162 31.51
488 Howell, James C245152 22.87
489 Pribyl, Josef245053 42.47
490 Ardiansyah, Haji245073 38.32
491 Gomez Baillo, Jorge H245059 30.94
492 Schulte, Oliver244971 21.28
493 Atlas, Valeri244974 21.95
494 Ilincic, Zlatko244951 21.89
495 Garcia Palermo, Carlos244952 36.33
496 Sakaev, Konstantin244965 15.96
497 Fominyh, Alexander244966 30.79
498 Semkov, Semko244955 30.09
499 Casper, Thomas244862 31.04
500 Rakic, Tomislav244873 55.39

These ratings, calculated as of March 31, 1990, incorporate all games (against rated opponents) played in the time between April 1, 1989 and March 31, 1990, along with the ratings that were already calculated as of March 31, 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 March 31, 1990. This represents the player's estimated strength on April 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 April 1, 1990. The +/- value represents the standard deviation of that estimate; the player's true strength on April 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 April 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 March 31, 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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