< December 31, 1989     Back to date list    February 28, 1990 >

Top 10 active players as of January 31, 1990


Top 500 active players as of January 31, 1990

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28564879.3% #126.80
2 Karpov, Anatoly E27914815.2% #438.69
3 Timman, Jan H2731481.7% #1438.13
4 Ivanchuk, Vassily2720491.1% #1820.87
5 Salov, Valery B2705500.6% #2625.68
6 Korchnoi, Viktor L2693470.2% #3158.86
7 Short, Nigel D2690470.2% #3424.66
8 Gelfand, Boris2688490.3% #3621.60
9 Gurevich, Mikhail N2683480.1% #3930.94
10 Beliavsky, Alexander G2676480.1% #4436.12
11 Ehlvest, Jaan2676480.1% #4427.30
12 Andersson, Ulf2672480.1% #4838.59
13 Dolmatov, Sergey V2668490.1% #5130.94
14 Ljubojevic, Ljubomir266848 #5039.24
15 Nunn, John D M265948 #5934.77
16 Yudasin, Leonid G265950 #6030.48
17 Lputian, Smbat G265749 #6131.96
18 Portisch, Lajos265648 #6352.82
19 Speelman, Jonathan S265448 #6433.33
20 Khalifman, Alexander2654500.1% #6524.04
21 Vaganian, Rafael A265248 #6638.29
22 Ribli, Zoltán265248 #6638.40
23 Polugaevsky, Lev A264850 #7155.20
24 Vladimirov, Evgeny Y264752 #7333.03
25 Tukmakov, Vladimir B264750 #7243.88
26 Dautov, Rustem264651 #7424.17
27 Dreev, Alexey264649 #7421.03
28 Bareev, Evgeny264650 #7423.19
29 Hübner, Robert264548 #7341.23
30 Seirawan, Yasser264548 #7329.85
31 Jussupow, Artur M264448 #7429.96
32 Tal, Mikhail264349 #7553.23
33 Yurtaev, Leonid264252 #8030.75
34 Chernin, Alexander M264149 #7829.90
35 Christiansen, Larry M264050 #8033.59
36 Sokolov, Andrey Y263749 #8126.86
37 Nikolic, Predrag263548 #8429.39
38 Gulko, Boris F263249 #8742.97
39 Gavrikov, Victor N263249 #8932.51
40 Agdestein, Simen263051 #9122.71
41 Aseev, Konstantin N262951 #9329.28
42 Sax, Gyula262948 #9138.62
43 Vyzmanavin, Alexey262751 #9530.08
44 Azmaiparashvili, Zurab A262651 #9629.87
45 Sveshnikov, Evgeny E262451 #9839.96
46 Balashov, Yury S262448 #9740.88
47 Epishin, Vladimir262450 #9824.55
48 Anand, Viswanathan262350 #9820.14
49 Eingorn, Viacheslav S262349 #9833.18
50 Oll, Lembit262150 #10123.77
51 Georgiev, Kiril261850 #10524.17
52 Dvoiris, Semen I261751 #10731.24
53 Dzindzichashvili, Roman Y261752 #10745.74
54 Timoshchenko, Gennady261651 #10740.76
55 Razuvaev, Yury S261650 #10744.31
56 Pigusov, Evgeny261452 #11128.83
57 Ivanov, Alexander V261253 #11433.75
58 Dorfman, Iosif D261151 #11337.75
59 Smirin, Ilia261150 #11422.03
60 Rozentalis, Eduardas260951 #11726.68
61 Shirov, Alexei260851 #11717.57
62 Hansen, Curt260850 #11525.37
63 Kovalev, Andrei260756 #12328.23
64 Goldin, Alexander260650 #11924.92
65 Psakhis, Lev B260548 #11831.17
66 Lerner, Konstantin Z260450 #12139.92
67 Romanishin, Oleg M260348 #12038.06
68 Miles, Anthony J260248 #12234.77
69 deFirmian, Nicholas E260149 #12332.51
70 Fedorowicz, John P260149 #12431.34
71 Kruppa, Yuri260054 #12925.61
72 Novikov, Igor A260051 #12627.69
73 Kamsky, Gata260054 #12815.66
74 Panchenko, Alexandar G2599710.1% #14128.81
75 Makarichev, Sergey Y259854 #13136.20
76 Pétursson, Margeir259747 #12629.95
77 Dokhoian, Yury259750 #12925.26
78 Hort, Vlastimil259549 #13046.05
79 Kuzmin, Gennady P259454 #13444.03
80 Smyslov, Vassily V259450 #13268.85
81 Kramnik, Vladimir259459 #13814.60
82 Yermolinsky, Alex V259155 #13831.80
83 Tiviakov, Sergei258957 #14216.96
84 Ulibin, Mikhail258851 #13818.67
85 Spassky, Boris V258848 #13753.00
86 Ftácnik, Lubomír258849 #13732.25
87 Rashkovsky, Nukhim N258751 #14043.79
88 Krasenkow, Michal258550 #14126.21
89 Smagin, Sergey258549 #14131.40
90 Akopian, Vladimir258551 #14218.15
91 Panchenko, Alexander N258553 #14436.32
92 van der Wiel, John T H258448 #14130.48
93 Kharitonov, Andrey Y258250 #14430.82
94 Vasiukov, Evgeny A258151 #14656.90
95 Chandler, Murray G258149 #14629.82
96 Sturua, Zurab258066 #15730.65
97 Kveinys, Aloyzas258059 #15327.56
98 Malaniuk, Vladimir P258048 #14632.53
99 Taimanov, Mark E257956 #15263.98
100 Shneider, Aleksandr257957 #15227.69
101 Nogueiras, Jesus257849 30.54
102 Kurajica, Bojan257760 42.21
103 Hjartarson, Jóhann257748 26.97
104 Cherepkov, Alexander V257776 69.25
105 Olafsson, Helgi257749 33.46
106 Giorgadze, Giorgi257654 25.31
107 Ionov, Sergey257664 28.06
108 Chekhov, Valery A257650 34.18
109 Palac, Mladen257554 18.95
110 Neverov, Valery257452 25.61
111 Spraggett, Kevin B257450 35.22
112 Yakovich, Yuri257454 27.17
113 Sokolov, Ivan257249 21.63
114 Kengis, Edvins257253 30.80
115 Tseshkovsky, Vitaly V257250 45.35
116 Shabanov, Yury F257262 52.22
117 Glek, Igor V257152 28.23
118 Torre, Eugenio257151 38.24
119 Larsen, Bent257149 54.91
120 Adams, Michael257049 18.20
121 Khenkin, Igor257053 21.86
122 Kuzmin, Alexey257054 26.90
123 Janjgava, Lasha257055 19.74
124 Smejkal, Jan257050 43.86
125 Bikhovsky, Avigdor I256963 34.90
126 Pintér, József256852 36.23
127 Sosonko, Gennadi256853 46.70
128 Todorcevic, Miodrag256750 49.22
129 Hulak, Krunoslav256650 38.68
130 Gorelov, Sergey G256463 32.45
131 Ubilava, Elizbar E256452 39.43
132 Huzman, Alexander256352 27.81
133 Morovic Fernández, Iván E256154 26.85
134 Timoshenko, Georgy256153 23.66
135 Sorokin, Maxim256053 22.02
136 Bönsch, Uwe255950 31.29
137 Benjamin, Joel L255949 25.89
138 Kalinitschew, Sergey255862 33.99
139 Vaisser, Anatoli255850 40.90
140 Knaak, Rainer F255751 36.87
141 Popovic, Petar255749 30.96
142 Dlugy, Maxim255749 24.01
143 Kochiev, Alexander255652 33.85
144 Donchev, Dimitar I255655 31.53
145 Mikhalchishin, Adrian B255450 35.20
146 Duer, Arne255466 30.56
147 Kindermann, Stefan255448 30.09
148 Kavalek, Lubomir255463 46.48
149 Anikaev, Yury255369 41.59
150 Velimirovic, Dragoljub255351 47.72
151 Lobron, Eric255249 29.73
152 Kaidanov, Gregory S255251 30.30
153 Frolov, Artur255256 19.50
154 Mestel, A Jonathan255157 32.88
155 Suba, Mihai255051 42.66
156 Kudrin, Sergey255050 30.40
157 Magerramov, Elmar S255052 31.81
158 Kholmov, Ratmir D255051 64.72
159 Ye Rongguang254959 26.33
160 Petrienko, Vladimir254963 34.89
161 Lalic, Bogdan254849 25.90
162 Cvitan, Ognjen254649 28.31
163 Hodgson, Julian M254648 26.52
164 Minasian, Artashes254655 23.03
165 Browne, Walter S254651 41.06
166 Mnatsakanian, Eduard A254668 51.15
167 Rogers, Ian254650 29.60
168 Quinteros, Miguel A254666 42.09
169 Cebalo, Mišo254549 44.98
170 King, Daniel J254549 26.42
171 Arkhipov, Sergey254559 35.61
172 Orlov, Georgi254459
173 Machulsky, Anatoly D254459 33.35
174 Najdorf, Miguel254466 79.79
175 Kuporosov, Viktor254367 28.35
176 Adorján, András254250 39.83
177 Damljanovic, Branko254248 28.62
178 Rachels, Stuart254158 20.35
179 Soppe, Guillermo254162 29.37
180 Ye Jiangchuan254159 29.20
181 Ruban, Vadim254053 25.63
182 Khmelnitsky, Igor N254061 21.44
183 Rohde, Michael A254052 30.43
184 Geller, Efim P253951 64.91
185 Milos, Gilberto253853 26.25
186 Ivanovic, Božidar253850 43.44
187 Panno, Oscar R253853 54.87
188 Vaulin, Alexander253771 32.87
189 Moskalenko, Viktor253751 29.16
190 Groszpeter, Attila253650 29.64
191 Naumkin, Igor253655 24.47
192 Henley, Ron W253575 33.15
193 Uhlmann, Wolfgang253552 54.84
194 Gruenfeld, Yehuda253453 33.92
195 Arnason, Jon L253450 29.22
196 Zagrebelny, Sergey253462
197 Mokrý, Karel253350 30.98
198 Greenfeld, Alon253253 25.79
199 Chiburdanidze, Maia G253152 29.04
200 Serper, Grigory253154 20.38
201 Chudinovskih, Alexander253170 22.89
202 Pfleger, Helmut253158 46.48
203 Karpman, Vadim253055 24.72
204 Barua, Dibyendu253056 23.26
205 Wahls, Matthias253049 22.01
206 Tischbierek, Raj252952 27.35
207 Wilder, Michael252951 27.37
208 Karlsson, Lars252951 34.55
209 Illescas Cordoba, Miguel252950 24.16
210 Darga, Klaus V252864 55.93
211 Csom, István252749 49.66
212 Bischoff, Klaus252749 28.64
213 Veingold, Aleksander252763 36.31
214 Bagirov, Vladimir K252652 53.46
215 Horvath, Jozsef252649 25.47
216 Tseitlin, Mark D252660 46.36
217 Lanka, Zigurds252656 29.69
218 Rodriguez, Amador252650 33.40
219 Lukin, Andrei M252553 41.42
220 Savchenko, Stanislav252555 23.03
221 Kožul, Zdenko252549 23.69
222 Hebden, Mark252550 31.95
223 Malisauskas, Vidmantas252554 26.49
224 Gufeld, Eduard E252555 53.87
225 Gleizerov, Evgeny252462 26.86
226 Brodsky, Michail252460 20.84
227 Murey, Yakov252451 48.49
228 Gheorghiu, Florin252450 45.82
229 Bass, Leonid252360 32.67
230 Zapata, Alonso252351 31.44
231 Vitolinš, Alvis252358 43.63
232 Alburt, Lev O252252 44.44
233 Komarov, Dimitri252260 21.16
234 Dizdar, Goran252252 31.16
235 Gipslis, Aivars252163 52.97
236 Kovacevic, Vladimir252150 47.85
237 Antunes, Antonio252056 27.98
238 Meister, Peter252056 23.60
239 Inkiov, Ventzislav252051 33.70
240 Basin, Leonid251956 32.19
241 Liberzon, Vladimir M251958 52.86
242 Magomedov, Magaram251955 23.70
243 Savon, Vladimir A251853 49.35
244 Georgadze, Tamaz V251862 42.23
245 Piket, Jeroen251848 21.01
246 Sher, Miron N251854 37.59
247 Cámpora, Daniel H251850 32.59
248 Marjanovic, Slavoljub251851 35.07
249 Gofshtein, Leonid D251869 36.78
250 Graf, Alexander251860 27.43
251 Baburin, Alexander251863 22.94
252 Kiselev, Sergey251753 28.38
253 Meshkov, Yuri A251772 40.04
254 London, Dimitri251665 27.19
255 Lin Ta251663 26.99
256 Hellers, Ferdinand251549 21.01
257 Zhuravliov, Valerij251569 51.14
258 Palatnik, Semen A251554 39.85
259 Govedarica, Radovan251466 41.96
260 Van der Sterren, Paul251449 33.87
261 Ninov, Kiril251455 21.31
262 Vorotnikov, Vladislav V251465 42.45
263 Faragó, Iván251349 43.83
264 Anastasian, Ashot251352 25.54
265 Wojtkiewicz, Aleksander251351 27.04
266 Adianto, Utut251265 24.87
267 Bronstein, David I251256 65.94
268 Gruenberg, Hans Ulrich251250 34.06
269 Doroshkievich, Vladimir K251169 52.09
270 Sherbakov, Ruslan251058 20.38
271 Espig, Lutz251055 41.07
272 Arbakov, Valentin251059 38.01
273 Meyer, E.250972
274 Lau, Ralf250949 30.28
275 Yuneev, Alexey250754
276 Renet, Olivier250749 25.11
277 Tseitlin, Mikhail S250652 42.62
278 Foisor, Ovidiu250658 30.82
279 Franco Ocampos, Zenon250652 33.72
280 Petrosian, Arshak B250650 36.12
281 Kupreichik, Viktor D250649 40.58
282 Guseinov, Aidyn250563 38.08
283 Mainka, Romuald250552 26.71
284 Belov, Igor250557
285 Sellos, Didier250459 32.94
286 Meister, Yakov250457 34.39
287 Watson, William N250449 27.79
288 Loginov, Valery A250462 34.13
289 Djuric, Stefan250450 34.51
290 Yrjola, Jouni250352 30.27
291 Moroz, Alexander250357 29.04
292 Frias, Victor J250358 33.97
293 Polgar, Zsuzsa250349 20.78
294 Gligoric, Svetozar250352 66.99
295 Unzicker, Wolfgang250258 64.60
296 Hickl, Joerg250250 24.79
297 Gaprindashvili, Nona250259 48.74
298 Ivanov, Igor V250152 43.06
299 Xu Jun250157 27.37
300 Ree, Hans250155 45.38
301 Rodriguez Vargas, Orestes250157 46.57
302 Barlov, Dragan250150 33.00
303 Vera, Reynaldo250153 29.06
304 Stohl, Igor250150 25.34
305 Kotronias, Vasilios250150 25.43
306 Barbero, Gerardo F250051 28.44
307 Shabalov, Alexander250053 22.38
308 Lukacs, Peter250050 39.56
309 Kallai, Gabor249953 30.94
310 Meduna, Eduard249950 39.39
311 Hertneck, Gerald249954 26.37
312 Kishnev, Sergey249863 33.25
313 Tolnai, Tibor249850 25.36
314 Zaichik, Gennady L249851 32.96
315 Rausis, Igors249861 28.81
316 Petkevich, Jusefs249861 49.12
317 Stoica, Valentin249773 39.95
318 Wolff, Patrick G249651 21.95
319 Gutman, Lev249650 44.35
320 García Gonzáles, Guillermo249653 36.14
321 Reyes, Juan249662 26.76
322 Simic, Radoslav249656 41.64
323 Georgiev, Krum249552 31.69
324 Hansen, Lars Bo249449 21.35
325 Tisdall, Jonathan D249450 31.43
326 Andrianov, Nikolai249472 28.11
327 Granda Zuńiga, Julio E249452 22.93
328 Sahovic, Dragutin249461 49.48
329 Vukic, Milan249355 46.45
330 Kosten, Anthony C249349 31.52
331 Thorhallsson, Throstur249357 20.87
332 Ghinda, Mihail Viorel249362 40.52
333 Ledger, Andrew249366 20.69
334 Jansa, Vlastimil249251 47.18
335 Rechlis, Gad249254 22.98
336 Mochalov, Evgeny V249270 38.26
337 Matulovic, Milan249158 54.64
338 Nikolac, Juraj249060 57.77
339 Blatny, Pavel249049 21.61
340 Wedberg, Tom248950 36.18
341 Makarov, Marat248955 26.73
342 Barbulescu, Dan248867 25.61
343 Ziatdinov, Raset248870 31.09
344 Lein, Anatoly248854 58.84
345 Ornstein, Axel248762 37.77
346 Vogt, Lothar H248752 38.04
347 Ivkov, Borislav248654 56.22
348 Averbakh, Yury L248670 67.97
349 Ekstroem, Roland248657 33.69
350 Rubinetti, Jorge A248559 44.83
351 Rivas Pastor, Manuel248553 29.55
352 Arkell, Keith C248452 29.06
353 Cramling, Pia248452 26.77
354 Novik, Maxim248469 26.14
355 Brunner, Lucas248349 22.67
356 Piskov, Yury248355 28.30
357 Kouatly, Bachar248353 31.91
358 Tunik, Gennady248355 36.68
359 Klinger, Josef248350 22.65
360 Sznapik, Aleksander248350 38.97
361 Kosic, Dragan248261 19.95
362 Motwani, Paul248256 27.63
363 Fernandez Garcia, Jose Luis248260 35.74
364 Pekarek, Ales248253 28.12
365 Stanojevic, Branko248273 47.08
366 Plaskett, Jim248153 29.87
367 Flear, Glenn C248149 30.96
368 Howell, James C248053 22.70
369 Mortensen, Erling248052 34.82
370 Levitt, Jonathan248052 26.66
371 Mascarinas, Rico248056 36.91
372 Ionescu, Constantin247957 31.38
373 Davies, Nigel R247949 29.50
374 Schussler, Harry247851 32.60
375 Schmittdiel, Eckhard247850 29.72
376 Klundt, Klaus247860 48.10
377 Marangunic, Srdjan247767 46.25
378 Lombardy, William J247774 52.16
379 Dizdarevic, Emir247751 31.83
380 Gruenenwald, Joerg247768 24.66
381 Hazai, Laszlo247753 36.63
382 Popchev, Milko247753 25.22
383 Sideif Sade, Fikret I247764 38.08
384 Drasko, Milan247750 27.15
385 Brooks, Michael A247662 28.79
386 Kantsler, Boris247656 27.79
387 Reshevsky, Samuel H247659 78.18
388 Saltaev, Mihail247665 27.20
389 Rogulj, Branko247668 38.50
390 Bruk, Ofer247657 22.05
391 Kharlov, Andrei247666 21.20
392 Nemet, Ivan247656 46.80
393 Wang Zili247660 21.63
394 Rajkovic, Dusan247651 47.62
395 Marin, Mihail247555 24.78
396 Byrne, Robert E247558 61.78
397 Khasin, Alexander247560 38.76
398 Varavin, Viktor247566 22.69
399 Schmidt, Wlodzimierz247449 46.81
400 Rukavina, Josip247463 47.17
401 Dimitrov, Vladimir247459 21.80
402 Negulescu, Adrian247362 28.64
403 Lautier, Joel247349 16.80
404 Zilberstein, Valery I247370 46.80
405 Skembris, Spyridon247351 31.94
406 Gallagher, Joseph G247350 25.74
407 Tabatadze, Tamaz247268 21.84
408 Filipenko, Alexander V247269 40.91
409 Lima, Darcy247260 27.69
410 Norwood, David247255 21.33
411 Nikolenko, Oleg247163 30.62
412 Lutz, Christopher247154 18.93
413 Kogan, Boris247171
414 Seret, Jean Luc247160
415 Gurgenidze, Bukhuti I247161 56.22
416 Gdanski, Jacek247154 19.17
417 Dzuban, Oleg I247165
418 Sadler, Matthew247057 15.71
419 Mohr, Georg247055 24.99
420 Mirkovic, Slobodan247065 31.51
421 Mednis, Edmar J247053 52.86
422 Efimov, Igor246963 29.37
423 Szekely, Peter246953 34.97
424 Zilberman, Nathan R246958 49.74
425 Haba, Petr246851 25.07
426 Gschnitzer, Oswald246859 23.97
427 Polgar, Judit246851 13.52
428 Gurevich, Vladimir246860 30.49
429 Cid, Marino Alejandro246872 31.63
430 Padevsky, Nikola B246860 56.67
431 Strikovic, Aleksa246851 28.72
432 Kozlov, V.246765
433 Dueball, Juergen246672 44.84
434 Knezevic, Milorad246656 53.25
435 Murshed, Niaz246656 23.72
436 Voitsekhovsky, Stanislav246676 25.48
437 Semkov, Semko246655 29.92
438 Yailjan, M.246666
439 Renman, Nils Gustaf246564
440 Zlotnik, Boris A246562 43.29
441 Titov, German246559 26.76
442 Pytel, Krzysztof246559 44.71
443 Garcia Palermo, Carlos246553 36.16
444 Abramovic, Boško246450 38.96
445 Pichler, Juergen246459 28.66
446 Kuczynski, Robert246449 23.79
447 Hausner, Ivan246454 37.79
448 Ilincic, Zlatko246351 21.72
449 Lukov, Valentin246255 34.14
450 Ikonnikov, Vyacheslav246264 23.88
451 Zelcic, Robert246268 24.36
452 Finegold, Benjamin246257 20.40
453 Beshukov, Sergei246270 18.83
454 Ioseliani, Nana246157 27.96
455 Tringov, Georgy P246161 52.90
456 Zhelnin, Vladimir V246161 42.88
457 Prandstetter, Eduard246153 41.13
458 Braga, Fernando246157 31.56
459 Krnic, Zdenko246063 42.33
460 Hresc, Vladimir246067 38.20
461 Cabrilo, Goran246052 31.58
462 Kolev, Atanas246057 22.54
463 Akhmilovskaya, Elena246061
464 Staniszewski, Piotr246056 23.41
465 Moldobaev, Emelbek246061
466 Nijboer, Friso245952 24.68
467 Lendwai, Reinhard245960 23.30
468 Ostermeyer, Peter245962 46.30
469 Horváth, Csaba245951 21.65
470 Raicevic, Momcilo245958
471 Thorsteins, Karl245952 25.30
472 Mukhametov, Eldar245969 20.69
473 Bergstrom, Christer245862 31.34
474 Sunye Neto, Jaime245855 32.74
475 Kraidman, Yair245864 57.25
476 Martin del Campo, Roberto245857
477 Legky, Nikolay A245856 34.80
478 Verduga, Denis Homero245861
479 Campos, Jose Felix245765 23.93
480 Lechtynsky, Jiri245753 42.18
481 Temirbaev, Serik245661
482 Womacka, Mathias245668 23.60
483 Gonzalez, JA.245675
484 Tempone, Marcelo245656 27.40
485 Ardiansyah, Haji245671 38.15
486 Luther, Thomas245553 20.24
487 Vilela, Jose Luis245558 36.87
488 Ermenkov, Evgenij245553 40.34
489 Popov, Luben245570 54.01
490 Luczak, Andrzej245575 41.15
491 Brestian, Egon245454 25.51
492 Semeniuk, Alexander A245466 37.39
493 Rakic, Tomislav245473 55.22
494 Trapl, Jindrich245468 47.85
495 Santo Roman, Marc245455 29.38
496 Cifuentes Parada, Roberto245354 32.11
497 Vokác, Marek245353 31.15
498 Kirov Ivanov, Nino245252 44.39
499 Velikov, Petar245252 38.84
500 Yuferov, Sergey N245163 44.16

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