< September 30, 1990     Back to date list    November 30, 1990 >

Top 10 active players as of October 31, 1990

  #  

Player Rating +/-
1 Kasparov, Garry K284448
2 Karpov, Anatoly E279648
3 Ivanchuk, Vassily274249
4 Gelfand, Boris272848
5 Timman, Jan H270948
6 Salov, Valery B270151
7 Yudasin, Leonid G269749
8 Korchnoi, Viktor L269347
9 Gurevich, Mikhail N269148
10 Short, Nigel D269147

About these ratings

Top 500 active players as of October 31, 1990

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28444870.0% #227.55
2 Karpov, Anatoly E27964820.8% #439.44
3 Ivanchuk, Vassily2742493.2% #1121.62
4 Gelfand, Boris2728481.7% #1522.35
5 Timman, Jan H2709480.8% #2338.88
6 Salov, Valery B2701510.6% #2826.43
7 Yudasin, Leonid G2697490.4% #2931.23
8 Korchnoi, Viktor L2693470.3% #3159.61
9 Gurevich, Mikhail N2691480.3% #3331.69
10 Short, Nigel D2691470.3% #3225.41
11 Ehlvest, Jaan2683480.2% #3828.05
12 Bareev, Evgeny2680490.2% #4123.94
13 Beliavsky, Alexander G2677480.1% #4236.87
14 Khalifman, Alexander2671480.1% #4724.79
15 Andersson, Ulf2664480.1% #5339.34
16 Dolmatov, Sergey V2662490.1% #5631.70
17 Dreev, Alexey265649 #6021.78
18 Polugaevsky, Lev A265449 #6355.94
19 Lputian, Smbat G265349 #6432.71
20 Jussupow, Artur M265249 #6430.72
21 Gavrikov, Victor N265150 #6633.26
22 Speelman, Jonathan S265048 #6734.08
23 Vyzmanavin, Alexey264850 #6930.83
24 Nunn, John D M264749 #6935.52
25 Chernin, Alexander M264748 #6930.65
26 Balashov, Yury S264449 #7341.63
27 Ribli, Zoltán264249 #7439.15
28 Portisch, Lajos264248 #7453.57
29 Dautov, Rustem264252 #7824.92
30 Seirawan, Yasser264148 #7630.60
31 Nikolic, Predrag263948 #7730.14
32 Hübner, Robert263849 #8041.98
33 Ljubojevic, Ljubomir263849 #7939.99
34 Tal, Mikhail263849 #7953.97
35 Dzindzichashvili, Roman Y263751 #8246.49
36 Tiviakov, Sergei2635560.1% #8817.71
37 Anand, Viswanathan263349 #8420.89
38 Epishin, Vladimir263249 #8625.30
39 Vaganian, Rafael A263248 #8639.04
40 Kamsky, Gata263250 #8716.41
41 Agdestein, Simen263151 #8823.46
42 Vladimirov, Evgeny Y263150 #8833.78
43 Yurtaev, Leonid262852 #9231.50
44 Georgiev, Kiril262849 #9024.92
45 Razuvaev, Yury S262550 #9445.06
46 Miles, Anthony J262548 #9435.52
47 Sax, Gyula262249 #9639.37
48 Shirov, Alexei262150 #10018.32
49 Azmaiparashvili, Zurab A262049 #9930.62
50 Ionov, Sergey262061 #10928.81
51 Romanishin, Oleg M261949 #10038.81
52 Eingorn, Viacheslav S261849 #10233.93
53 Kramnik, Vladimir261560 #11415.35
54 Rozentalis, Eduardas261450 #10827.43
55 Gulko, Boris F261448 #10643.73
56 Hjartarson, Jóhann261348 #10727.73
57 Sveshnikov, Evgeny E261352 #11040.72
58 Dvoiris, Semen I261350 #10931.99
59 Sokolov, Andrey Y261249 #10827.61
60 Dorfman, Iosif D261150 #11138.50
61 Glek, Igor V260752 #11828.98
62 Aseev, Konstantin N260551 #11930.03
63 Kruppa, Yuri260355 #12426.36
64 Malaniuk, Vladimir P260249 #12033.28
65 Oll, Lembit260050 #12324.52
66 deFirmian, Nicholas E260048 #12133.26
67 Dokhoian, Yury259550 #12926.01
68 Adams, Michael259448 #12918.95
69 Yermolinsky, Alex V259355 #13532.55
70 Makarichev, Sergey Y259352 #13336.95
71 Tukmakov, Vladimir B259248 #13244.63
72 Yakovich, Yuri259152 #13427.92
73 Pigusov, Evgeny259152 #13529.58
74 Goldin, Alexander259050 #13425.68
75 Sturua, Zurab259065 #14531.40
76 Olafsson, Helgi259050 #13534.21
77 Chandler, Murray G259048 #13330.57
78 Smirin, Ilia258949 #13522.78
79 Neverov, Valery258951 #13726.36
80 Timoshchenko, Gennady258951 #13741.51
81 Kuzmin, Gennady P258952 #13844.78
82 Ftácnik, Lubomír258848 #13533.00
83 Larsen, Bent258750 #13855.66
84 Hansen, Curt258750 #13826.12
85 Christiansen, Larry M258650 #13834.34
86 Kharitonov, Andrey Y258651 #14031.57
87 Todorcevic, Miodrag258550 #14049.97
88 Kurajica, Bojan258560 #14642.95
89 Kovalev, Andrei258455 #14428.98
90 Smagin, Sergey258448 #14032.15
91 Benjamin, Joel L258348 #14026.64
92 Psakhis, Lev B258348 #14131.92
93 Fedorowicz, John P258249 #14332.09
94 Pintér, József258153 #14636.97
95 Novikov, Igor A258050 #14628.44
96 Kengis, Edvins257952 #14731.55
97 Smyslov, Vassily V257949 #14769.60
98 Hort, Vlastimil257749 #14846.80
99 Averkin, Orest N257673 #16346.68
100 Sokolov, Ivan257650 #15022.38
101 Dlugy, Maxim257649 24.76
102 Krasenkow, Michal257450 26.96
103 Lerner, Konstantin Z257350 40.67
104 van der Wiel, John T H257248 31.23
105 Akopian, Vladimir257250 18.90
106 Pétursson, Margeir257148 30.71
107 Shneider, Aleksandr257154 28.44
108 Naumkin, Igor257051 25.22
109 Taimanov, Mark E257060 64.73
110 Kuzmin, Alexey256955 27.65
111 Spassky, Boris V256950 53.75
112 Smejkal, Jan256950 44.61
113 Torre, Eugenio256852 38.98
114 Vaulin, Alexander256864 33.62
115 Morovic Fernández, Iván E256755 27.60
116 Nogueiras, Jesus256650 31.29
117 Suba, Mihai256650 43.41
118 Hulak, Krunoslav256651 39.43
119 Ulibin, Mikhail256650 19.42
120 Arnason, Jon L256550 29.96
121 Tseshkovsky, Vitaly V256450 46.10
122 Giorgadze, Giorgi256454 26.06
123 Gorelov, Sergey G256467 33.20
124 Quinteros, Miguel A256357 42.84
125 Vasiukov, Evgeny A256350 57.65
126 Velimirovic, Dragoljub256351 48.47
127 Kalinitschew, Sergey256364 34.74
128 Minasian, Artashes256255 23.78
129 Khenkin, Igor256252 22.61
130 Rashkovsky, Nukhim N256151 44.54
131 Panchenko, Alexander N256152 37.07
132 Wahls, Matthias256049 22.76
133 Geller, Efim P255951 65.66
134 Chekhov, Valery A255950 34.92
135 Magerramov, Elmar S255853 32.56
136 Alburt, Lev O255851 45.19
137 Arkhipov, Sergey255856 36.36
138 Mestel, A Jonathan255755 33.63
139 Donchev, Dimitar I255757 32.28
140 Shabanov, Yury F255659 52.96
141 Kaidanov, Gregory S255551 31.05
142 Cvitan, Ognjen255550 29.06
143 Kavalek, Lubomir255564 47.23
144 Soppe, Guillermo255461 30.12
145 Kindermann, Stefan255348 30.84
146 Fominyh, Alexander255357 31.38
147 Sosonko, Gennadi255255 47.45
148 Ziatdinov, Raset255259 31.84
149 Lanka, Zigurds255155 30.44
150 Hodgson, Julian M255148 27.27
151 Ivanov, Alexander V255150 34.50
152 Vaisser, Anatoli255051 41.65
153 Spraggett, Kevin B255049 35.97
154 Komarov, Dimitri254964 21.91
155 Cebalo, Mišo254951 45.73
156 Huzman, Alexander254954 28.56
157 Lalic, Bogdan254850 26.65
158 Kholmov, Ratmir D254851 65.47
159 Damljanovic, Branko254849 29.37
160 Arbakov, Valentin254756 38.76
161 Uhlmann, Wolfgang254751 55.59
162 Bikhovsky, Avigdor I254756 35.65
163 Kudrin, Sergey254751 31.15
164 Rohde, Michael A254752 31.18
165 Lobron, Eric254749 30.48
166 Sorokin, Maxim254654 22.77
167 Zapata, Alonso254650 32.19
168 Milos, Gilberto254653 27.00
169 Popovic, Petar254650 31.71
170 Najdorf, Miguel254671 80.54
171 Ubilava, Elizbar E254652 40.18
172 Ruban, Vadim254652 26.38
173 Kveinys, Aloyzas254556 28.31
174 Janjgava, Lasha254552 20.49
175 Kožul, Zdenko254549 24.44
176 Khmelnitsky, Igor N254561 22.19
177 King, Daniel J254448 27.17
178 Mikhalchishin, Adrian B254450 35.95
179 Adorján, András254451 40.58
180 Orlov, Georgi254356
181 Malisauskas, Vidmantas254356 27.24
182 Baburin, Alexander254261 23.70
183 Zagrebelny, Sergey254263
184 Zhuravliov, Valerij254264 51.89
185 Browne, Walter S254150 41.81
186 Ye Jiangchuan254162 29.94
187 Rechlis, Gad254154 23.74
188 Mnatsakanian, Eduard A254174 51.90
189 Barua, Dibyendu254059 24.01
190 Mokrý, Karel254052 31.73
191 Zezulkin, Jurij254068 19.21
192 Duer, Arne254065 31.31
193 Machulsky, Anatoly D253959 34.10
194 Kochiev, Alexander253953 34.60
195 Ivanovic, Božidar253950 44.19
196 Bagirov, Vladimir K253951 54.21
197 Knaak, Rainer F253951 37.62
198 Kozlov, V.253869
199 Rachels, Stuart253755 21.10
200 Sherbakov, Ruslan253658 21.13
201 Lautier, Joel253649 17.55
202 Chiburdanidze, Maia G253551 29.79
203 Zlotnik, Boris A253462 44.04
204 Ikonnikov, Vyacheslav253458 24.63
205 Magomedov, Magaram253355 24.45
206 Illescas Cordoba, Miguel253349 24.91
207 Veingold, Aleksander253264 37.06
208 Hellers, Ferdinand253149 21.76
209 Piket, Jeroen253148 21.76
210 Rogers, Ian253150 30.35
211 Tischbierek, Raj253151 28.10
212 Anastasian, Ashot253154 26.29
213 Frias, Victor J253055 34.72
214 Panchenko, Alexandar G253065 29.56
215 Bönsch, Uwe253050 32.04
216 Barbero, Gerardo F253052 29.19
217 Horvath, Jozsef252950 26.22
218 Yuneev, Alexey252955
219 Darga, Klaus V252971 56.69
220 Kuporosov, Viktor252958 29.10
221 Petrienko, Vladimir252864 35.64
222 Rodriguez, Amador252851 34.15
223 Gheorghiu, Florin252751 46.57
224 Anikaev, Yury252765 42.34
225 Ye Rongguang252657 27.08
226 Vitolinš, Alvis252659 44.38
227 Petrosian, Arshak B252651 36.87
228 Wilder, Michael252654 28.12
229 Savon, Vladimir A252553 50.10
230 Marin, Mihail252553 25.53
231 Chudinovskih, Alexander252470 23.64
232 Gofshtein, Leonid D252472 37.53
233 Greenfeld, Alon252453 26.54
234 Wojtkiewicz, Aleksander252449 27.79
235 Savchenko, Stanislav252355 23.78
236 Meister, Yakov252358 35.14
237 Belov, Igor252258
238 Georgadze, Tamaz V252164 42.97
239 Gufeld, Eduard E252157 54.62
240 Dizdar, Goran252151 31.91
241 Stohl, Igor252149 26.09
242 Henley, Ron W252068 33.90
243 Pfleger, Helmut252058 47.23
244 Simic, Radoslav252056 42.39
245 Csom, István251950 50.41
246 Panno, Oscar R251952 55.62
247 Tseitlin, Mark D251965 47.11
248 Watson, William N251849 28.54
249 Kupreichik, Viktor D251850 41.33
250 Hansen, Lars Bo251849 22.10
251 Bischoff, Klaus251749 29.39
252 Wolff, Patrick G251750 22.71
253 Gipslis, Aivars251763 53.73
254 Karlsson, Lars251752 35.30
255 Shabalov, Alexander251652 23.13
256 Palac, Mladen251654 19.70
257 Serper, Grigory251654 21.13
258 Bass, Leonid251657 33.42
259 Cid, Marino Alejandro251670 32.38
260 Moskalenko, Viktor251550 29.91
261 Tseitlin, Mikhail S251452 43.37
262 Groszpeter, Attila251450 30.39
263 Adianto, Utut251467 25.62
264 Lau, Ralf251450 31.03
265 Cámpora, Daniel H251450 33.34
266 Gruenberg, Hans Ulrich251451 34.81
267 Liberzon, Vladimir M251359 53.61
268 Frolov, Artur251357 20.25
269 Mochalov, Evgeny V251370 39.01
270 Granda Zuńiga, Julio E251352 23.68
271 London, Dimitri251273 27.94
272 Matulovic, Milan251257 55.39
273 Kharlov, Andrei251266 21.94
274 Karpman, Vadim251155 25.47
275 Brodsky, Michail251059 21.59
276 Polgar, Zsuzsa251049 21.53
277 Meshkov, Yuri A251070 40.79
278 Renet, Olivier251050 25.86
279 Gaprindashvili, Nona250955 49.49
280 Ivanov, Igor V250852 43.81
281 Kotronias, Vasilios250850 26.18
282 Lukin, Andrei M250854 42.17
283 Hertneck, Gerald250852 27.12
284 Kovacevic, Vladimir250851 48.60
285 Kosten, Anthony C250749 32.27
286 Kiselev, Sergey250753 29.13
287 Hickl, Joerg250650 25.54
288 Graf, Alexander250661 28.18
289 Kishnev, Sergey250563 33.99
290 Filipenko, Alexander V250569 41.66
291 Xu Jun250561 28.12
292 Sher, Miron N250553 38.34
293 Guseinov, Aidyn250564 38.83
294 Brunner, Lucas250549 23.42
295 Klinger, Josef250450 23.40
296 Faragó, Iván250349 44.58
297 Timoshenko, Georgy250351 24.41
298 Pekarek, Ales250355 28.87
299 Yrjola, Jouni250353 31.02
300 Vorotnikov, Vladislav V250365 43.20
301 Rodriguez Vargas, Orestes250254 47.32
302 Govedarica, Radovan250270 42.71
303 Reyes, Juan250266 27.51
304 Zhidkov, Valery S250160 51.16
305 Meduna, Eduard250151 40.14
306 Lutz, Christopher250152 19.69
307 Djuric, Stefan250051 35.26
308 Lin Ta250058 27.75
309 Tolnai, Tibor249949 26.11
310 Rausis, Igors249956 29.56
311 Xie Jun249973 20.00
312 Marjanovic, Slavoljub249852 35.82
313 Gruenfeld, Yehuda249854 34.67
314 Vera, Reynaldo249852 29.81
315 Gligoric, Svetozar249753 67.74
316 Ivkov, Borislav249754 56.96
317 Petkevich, Jusefs249665 49.87
318 Franco Ocampos, Zenon249653 34.47
319 García Gonzáles, Guillermo249553 36.89
320 Kantsler, Boris249558 28.54
321 Makarov, Marat249555 27.48
322 Palatnik, Semen A249454 40.60
323 Hebden, Mark249450 32.71
324 Mainka, Romuald249451 27.46
325 Plaskett, Jim249453 30.62
326 Georgiev, Krum249451 32.44
327 Strikovic, Aleksa249453 29.47
328 Bronstein, David I249354 66.70
329 Vukic, Milan249355 47.20
330 Cramling, Pia249350 27.52
331 Ghinda, Mihail Viorel249358 41.27
332 Kallai, Gabor249354 31.69
333 Gleizerov, Evgeny249362 27.61
334 Van der Sterren, Paul249249 34.62
335 Inkiov, Ventzislav249250 34.45
336 Espig, Lutz249253 41.82
337 Loginov, Valery A249256 34.88
338 Barlov, Dragan249150 33.75
339 Sellos, Didier249165 33.70
340 Ionescu, Constantin249053 32.13
341 Schlosser, Philipp249051 22.20
342 Ernst, Thomas249050 30.20
343 Nikolac, Juraj249064 58.52
344 Andrianov, Nikolai248963 28.86
345 Lukacs, Peter248750 40.31
346 Zaichik, Gennady L248752 33.72
347 Abramovic, Boško248751 39.71
348 Vogt, Lothar H248651 38.79
349 Schoenthier, Frank248668 31.95
350 Mukhametov, Eldar248661 21.44
351 Perovic, Dragan248675
352 Varavin, Viktor248665 23.44
353 Kremenetsky, Anatoly M248671 51.80
354 Sahovic, Dragutin248562 50.23
355 Unzicker, Wolfgang248456 65.35
356 Zilberstein, Valery I248372 47.55
357 Basin, Leonid248359 32.93
358 Galliamova, Alisa248358 18.79
359 Rubinetti, Jorge A248260 45.58
360 Hazai, Laszlo248257 37.38
361 Antunes, Antonio248253 28.73
362 Rivas Pastor, Manuel248256 30.30
363 Schmidt, Wlodzimierz248249 47.56
364 Sideif Sade, Fikret I248167 38.83
365 Piskov, Yury248154 29.05
366 Lein, Anatoly248153 59.59
367 Murey, Yakov248152 49.24
368 Gurevich, Vladimir248158 31.24
369 Foisor, Ovidiu248160 31.57
370 Popchev, Milko248156 25.96
371 Saltaev, Mihail248166 27.94
372 Mortensen, Erling248052 35.57
373 Reeh, Oliver247952 26.78
374 Ornstein, Axel247966 38.52
375 Brenninkmeijer, Joris247951 21.13
376 Wang Zili247862 22.38
377 Sunye Neto, Jaime247852 33.49
378 Dzuban, Oleg I247874
379 Ree, Hans247853 46.13
380 Schussler, Harry247852 33.35
381 Mirkovic, Slobodan247766 32.26
382 Janovsky, Sergey247761 30.70
383 Rytshagov, Mikhail247770 22.96
384 Vehi Bach, Victor Manuel247760
385 Dizdarevic, Emir247652 32.58
386 Ninov, Kiril247654 22.06
387 Cabrilo, Goran247651 32.33
388 Thorsteins, Karl247553 26.05
389 Norwood, David247553 22.08
390 Moroz, Alexander247557 29.79
391 Mednis, Edmar J247452 53.61
392 Nemet, Ivan247455 47.55
393 Comas Fabrego, Luis247459 19.36
394 Umansky, Mikhail247371
395 Anic, Darko247358 33.50
396 Kolev, Atanas247355 23.29
397 Reshevsky, Samuel H247362 78.92
398 Root, Douglas247268 27.72
399 Drasko, Milan247251 27.90
400 Haba, Petr247251 25.82
401 Khasin, Alexander247161 39.51
402 Bruk, Ofer247156 22.80
403 Knezevic, Milorad247156 53.99
404 Gallagher, Joseph G247149 26.49
405 Moiseev, Viktor247173 31.47
406 Davies, Nigel R247050 30.25
407 Tunik, Gennady247059 37.43
408 Blatny, Pavel246950 22.36
409 Rukavina, Josip246963 47.92
410 Okhotnik, Vladimir246959 40.67
411 Polgar, Judit246951 14.27
412 Kozlov, Vladimir N246961 40.42
413 Franic, Milan246870 26.34
414 Kogan, Boris246875
415 Howell, James C246851 23.45
416 Tempone, Marcelo246857 28.15
417 Castro Rojas, Oscar Humberto246866 37.48
418 Dimitrov, Vladimir246855 22.55
419 Vilela, Jose Luis246763 37.62
420 Titov, German246762 27.51
421 Kouatly, Bachar246754 32.66
422 Szekely, Peter246754 35.73
423 Efimov, Igor246761 30.12
424 Tringov, Georgy P246758 53.65
425 Fishbein, Alexander246753 22.48
426 Fernandez Garcia, Jose Luis246754 36.49
427 Hresc, Vladimir246666 38.94
428 Kosic, Dragan246657 20.71
429 Lagunow, Alexander246671 23.30
430 Alterman, Boris246562 20.49
431 Brooks, Michael A246558 29.54
432 Womacka, Mathias246560 24.35
433 Kuczynski, Robert246549 24.54
434 Nikolenko, Oleg246563 31.37
435 Rajkovic, Dusan246552 48.37
436 Winants, Luc246552 27.83
437 Fokin, Sergey246563 35.05
438 Shmuter, Leonid246567 21.49
439 Byrne, Robert E246557 62.53
440 Wedberg, Tom246551 36.92
441 Kraidman, Yair246564 57.99
442 Novik, Maxim246467 26.89
443 Levitt, Jonathan246450 27.41
444 Flear, Glenn C246449 31.72
445 Legky, Nikolay A246356 35.55
446 Hecht, Hans-Joachim246372 51.76
447 Ledger, Andrew246362 21.44
448 Stangl, Markus246351 21.51
449 Ekstroem, Roland246358 34.44
450 Ermenkov, Evgenij246352 41.09
451 Orso, Miklos246262 34.40
452 Schmittdiel, Eckhard246149 30.47
453 Barbulescu, Dan246175 26.36
454 Blagojevic, Dragisa246157 24.83
455 Fiorito, Fabian246157 20.99
456 Stanojevic, Branko246172 47.83
457 Skembris, Spyridon246151 32.69
458 Vonthron, Horst246063 27.81
459 Kirov Ivanov, Nino246052 45.14
460 McKay, Roderick M245975 38.72
461 Hector, Jonny245949 26.72
462 Miralles, Gilles245949 24.73
463 Murshed, Niaz245957 24.47
464 Ostenstad, Berge245951 26.12
465 Gonzalez, JA.245973
466 Zelcic, Robert245868 25.11
467 Sanna, Gianlazzaro245863 30.55
468 Arencibia, Walter245851 23.28
469 Godena, Michele245863 23.34
470 Schneider, Lars Ake245857
471 Magem Badals, Jordi245855 23.19
472 Mohr, Stefan245750 23.02
473 Negulescu, Adrian245667 29.39
474 Gschnitzer, Oswald245655 24.73
475 Lima, Darcy245665 28.44
476 Mascarinas, Rico245654 37.66
477 Ambroz, Jan245561 36.37
478 Tabatadze, Tamaz245571 22.59
479 Sadler, Matthew245560 16.46
480 Prandstetter, Eduard245554 41.88
481 Hausner, Ivan245452 38.54
482 Kovacevic, Predrag245469 30.15
483 Bellon Lopez, Juan Manuel245452 40.48
484 Klundt, Klaus245464 48.85
485 Cramling, Dan245473 31.74
486 Buecker, Peter245465
487 Jansa, Vlastimil245451 47.92
488 Romero Holmes, Alfonso245353 25.42
489 Nijboer, Friso245351 25.43
490 Rakic, Tomislav245267 55.96
491 Kuijf, Marinus245250 30.72
492 Luther, Thomas245251 20.98
493 Gomez Baillo, Jorge H245256 31.53
494 Mariotti, Sergio245266 44.22
495 Ioseliani, Nana245155 28.72
496 Avshalumov, Alex245155 26.66
497 Gurgenidze, Bukhuti I245061 56.96
498 Pichler, Juergen245060 29.41
499 Casper, Thomas245065 31.62
500 Pribyl, Josef245053 43.05

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