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Top 10 active players as of September 30, 1989


Top 500 active players as of September 30, 1989

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28314864.2% #226.46
2 Karpov, Anatoly E27954726.6% #338.35
3 Timman, Jan H2728482.7% #1537.79
4 Short, Nigel D2707471.0% #2324.33
5 Ivanchuk, Vassily2702490.9% #2620.53
6 Salov, Valery B2698500.8% #2825.34
7 Beliavsky, Alexander G2697480.6% #2935.79
8 Korchnoi, Viktor L2680470.2% #3958.52
9 Gurevich, Mikhail N2679490.3% #4030.61
10 Hübner, Robert2677490.2% #4340.90
11 Gelfand, Boris2669490.2% #4821.27
12 Andersson, Ulf2668480.1% #4838.26
13 Tal, Mikhail2668480.1% #4952.89
14 Dolmatov, Sergey V2667490.2% #5030.61
15 Ehlvest, Jaan2667480.1% #5026.95
16 Speelman, Jonathan S2666480.1% #5032.99
17 Ljubojevic, Ljubomir2664480.1% #5238.91
18 Portisch, Lajos2662480.1% #5352.49
19 Polugaevsky, Lev A2662500.2% #5654.86
20 Dautov, Rustem2661520.2% #5723.84
21 Dreev, Alexey2658490.1% #5820.69
22 Yudasin, Leonid G2655500.1% #6130.14
23 Azmaiparashvili, Zurab A2655500.1% #6229.54
24 Jussupow, Artur M2651480.1% #6429.63
25 Ribli, Zoltán264548 #7038.06
26 Chernin, Alexander M264548 #7029.56
27 Tukmakov, Vladimir B264449 #7243.54
28 Nikolic, Predrag264148 #7529.05
29 Vaganian, Rafael A264148 #7537.95
30 Vladimirov, Evgeny Y2640530.1% #7932.69
31 Dvoiris, Semen I263652 #8330.91
32 Agdestein, Simen263650 #8222.37
33 Lputian, Smbat G263449 #8231.63
34 Gulko, Boris F263449 #8342.64
35 Georgiev, Kiril263349 #8423.84
36 Gavrikov, Victor N263249 #8532.17
37 Nunn, John D M262948 #8734.43
38 Khalifman, Alexander262949 #8823.70
39 Sveshnikov, Evgeny E262952 #9039.63
40 Timoshchenko, Gennady262650 #9340.42
41 Yurtaev, Leonid262552 #9530.41
42 Sax, Gyula262448 #9238.28
43 Aseev, Konstantin N262352 #9828.94
44 Vyzmanavin, Alexey262152 #9929.74
45 Seirawan, Yasser262048 #9829.52
46 Christiansen, Larry M261850 #10133.26
47 Bareev, Evgeny261750 #10222.86
48 Ionov, Sergey261659 #11127.73
49 Sokolov, Andrey Y261548 #10326.53
50 Dorfman, Iosif D261451 #10637.41
51 Pigusov, Evgeny261451 #10728.50
52 Anand, Viswanathan261351 #10619.80
53 Eingorn, Viacheslav S261349 #10632.85
54 Psakhis, Lev B261248 #10630.84
55 Malaniuk, Vladimir P261048 #10832.19
56 Spassky, Boris V261048 #10952.67
57 Ivanov, Alexander V261054 #11433.41
58 Epishin, Vladimir260951 #11324.22
59 Ubilava, Elizbar E260953 #11439.09
60 Balashov, Yury S260849 #11140.55
61 Smirin, Ilia260750 #11321.69
62 Smyslov, Vassily V260551 #11668.52
63 Hort, Vlastimil260449 #11645.72
64 Dzindzichashvili, Roman Y260354 #12145.40
65 Kruppa, Yuri260158 #12725.27
66 Kuzmin, Gennady P260156 #12543.70
67 Torre, Eugenio260151 #12237.90
68 Smagin, Sergey260150 #12231.06
69 Kharitonov, Andrey Y260149 #12130.49
70 Dokhoian, Yury260050 #12224.92
71 Krasenkow, Michal259752 #12725.88
72 Razuvaev, Yury S259650 #12643.96
73 Oll, Lembit259649 #12623.44
74 Rashkovsky, Nukhim N259551 #12843.45
75 Lerner, Konstantin Z259449 #12839.59
76 deFirmian, Nicholas E259350 #13032.18
77 Yermolinsky, Alex V259053 #13531.47
78 Romanishin, Oleg M258948 #13337.72
79 Taimanov, Mark E258957 #13963.65
80 Fedorowicz, John P258849 #13431.01
81 Vasiukov, Evgeny A258752 #13756.57
82 Naumkin, Igor258655 #14124.14
83 Miles, Anthony J258448 #13934.44
84 Hansen, Curt258449 #13925.03
85 Hjartarson, Jóhann258348 #13826.64
86 van der Wiel, John T H258348 #13830.14
87 Sorokin, Maxim258360 #14721.69
88 Rozentalis, Eduardas258251 #14326.34
89 Vaisser, Anatoli258151 #14240.57
90 Ftácnik, Lubomír258049 #14331.91
91 Pétursson, Margeir257948 #14229.62
92 Goldin, Alexander257850 #14524.59
93 Larsen, Bent257849 #14554.57
94 Pintér, József257751 #14735.89
95 Podgaets, Mikhail Y2577730.1% #16042.19
96 Nogueiras, Jesus257748 #14630.20
97 Huzman, Alexander257752 #14727.47
98 Tseshkovsky, Vitaly V257650 #14745.01
99 Neverov, Valery257653 #14925.27
100 Benjamin, Joel L257549 #14825.55
101 Karlsson, Lars257551 34.22
102 Kovalev, Andrei257557 27.90
103 Kholmov, Ratmir D257451 64.38
104 Olafsson, Helgi257449 33.12
105 Arkhipov, Sergey257257 35.27
106 Sosonko, Gennadi257153 46.37
107 Timoshenko, Georgy257155 23.33
108 Chandler, Murray G257049 29.49
109 Novikov, Igor A257051 27.35
110 Ulibin, Mikhail257051 18.33
111 Makarichev, Sergey Y257055 35.87
112 Akopian, Vladimir256952 17.81
113 Lobron, Eric256949 29.40
114 Spraggett, Kevin B256952 34.89
115 Shirov, Alexei256953 17.24
116 Kamsky, Gata256754 15.33
117 Smejkal, Jan256750 43.52
118 Kuzmin, Alexey256654 26.56
119 Kveinys, Aloyzas256660 27.22
120 Gorelov, Sergey G256559 32.12
121 Kavalek, Lubomir256559 46.14
122 Shabanov, Yury F256368 51.88
123 Adams, Michael256350 17.87
124 Yakovich, Yuri256256 26.83
125 Bikhovsky, Avigdor I256268 34.57
126 Adorján, András256151 39.50
127 Darga, Klaus V256168 55.60
128 Giorgadze, Giorgi256052 24.96
129 Todorcevic, Miodrag255951 48.89
130 Khenkin, Igor255955 21.52
131 Hulak, Krunoslav255851 38.35
132 Shereshevsky, Mikhail I255874 39.44
133 Kengis, Edvins255756 30.47
134 Panchenko, Alexander N255655 35.98
135 Didishko, Vereslav255674 40.47
136 Petrienko, Vladimir255665 34.56
137 Kudrin, Sergey255550 30.06
138 Sokolov, Ivan255549 21.30
139 Mikhalchishin, Adrian B255549 34.87
140 Browne, Walter S255452 40.72
141 Kindermann, Stefan255448 29.76
142 Hellers, Ferdinand255450 20.67
143 Quinteros, Miguel A255463 41.76
144 Geller, Efim P255350 64.58
145 Magerramov, Elmar S255354 31.47
146 Kalinitschew, Sergey255260 33.66
147 Janjgava, Lasha255252 19.40
148 Tiviakov, Sergei255261 16.63
149 Sturua, Zurab255167 30.31
150 Knaak, Rainer F255150 36.54
151 Popovic, Petar255049 30.63
152 Najdorf, Miguel254963 79.46
153 Lalic, Bogdan254950 25.56
154 Govedarica, Radovan254972 41.63
155 Liberzon, Vladimir M254872 52.52
156 Kramnik, Vladimir254863 14.26
157 Greenfeld, Alon254752 25.45
158 Soppe, Guillermo254762 29.04
159 Glek, Igor V254754 27.90
160 Kaidanov, Gregory S254751 29.96
161 Karpman, Vadim254655 24.38
162 Kiselev, Sergey254558 28.04
163 Dlugy, Maxim254550 23.67
164 Lanka, Zigurds254557 29.36
165 Bönsch, Uwe254549 30.95
166 Murey, Yakov254551 48.16
167 Sher, Miron N254458 37.25
168 Savon, Vladimir A254454 49.01
169 Chekhov, Valery A254350 33.84
170 Duer, Arne254366 30.22
171 Anastasian, Ashot254353 25.20
172 Morovic Fernández, Iván E254254 26.52
173 Gaprindashvili, Nona254263 48.41
174 Mestel, A Jonathan254257 32.55
175 Henley, Ron W254072 32.82
176 Kurajica, Bojan254067 41.87
177 Ivanovic, Božidar254050 43.10
178 Cvitan, Ognjen254050 27.96
179 Van der Sterren, Paul254049 33.54
180 Barua, Dibyendu253954 22.92
181 Zlotnik, Boris A253862 42.95
182 Panno, Oscar R253853 54.54
183 Moskalenko, Viktor253854 28.82
184 Adianto, Utut253762 24.54
185 Csom, István253750 49.33
186 Mnatsakanian, Eduard A253770 50.81
187 Mirkovic, Slobodan253670 31.17
188 Suba, Mihai253651 42.33
189 Rogers, Ian253549 29.27
190 Kochiev, Alexander253553 33.51
191 Alburt, Lev O253552 44.11
192 Uhlmann, Wolfgang253451 54.50
193 Gufeld, Eduard E253455 53.53
194 Mokrý, Karel253451 30.65
195 Bass, Leonid253462 32.33
196 Kupreichik, Viktor D253450 40.24
197 Bjelajac, Milan253368 41.54
198 Gipslis, Aivars253360 52.64
199 Wahls, Matthias253250 21.68
200 Orlov, Georgi253259
201 King, Daniel J253249 26.09
202 Komarov, Dimitri253259 20.83
203 Tseitlin, Mark D253160 46.02
204 Kovacevic, Vladimir253150 47.51
205 Bagirov, Vladimir K253052 53.12
206 Mochalov, Evgeny V253071 37.91
207 Rodriguez, Amador253050 33.06
208 Gheorghiu, Florin253052 45.48
209 Georgadze, Tamaz V253062 41.89
210 Velimirovic, Dragoljub252951 47.38
211 Pfleger, Helmut252958 46.15
212 Zapata, Alonso252851 31.11
213 Inkiov, Ventzislav252852 33.36
214 Wilder, Michael252850 27.04
215 Minasian, Artashes252859 22.69
216 Ninov, Kiril252754 20.97
217 Nikolac, Juraj252758 57.44
218 Ruban, Vadim252752 25.30
219 Gofshtein, Leonid D252765 36.44
220 Cebalo, Mišo252650 44.65
221 Milos, Gilberto252653 25.91
222 Groszpeter, Attila252550 29.31
223 Yuneev, Alexey252563
224 Lukin, Andrei M252355 41.09
225 Barlov, Dragan252351 32.67
226 Hodgson, Julian M252348 26.18
227 Xu Jun252256 27.04
228 Savchenko, Stanislav252254 22.69
229 Horvath, Jozsef252250 25.13
230 Shneider, Aleksandr252258 27.36
231 Faragó, Iván252149 43.49
232 Yrjola, Jouni252151 29.93
233 Chiburdanidze, Maia G252152 28.70
234 Cámpora, Daniel H252049 32.25
235 Antunes, Antonio252056 27.65
236 Donchev, Dimitar I252056 31.19
237 Vitolinš, Alvis251964 43.29
238 Damljanovic, Branko251949 28.29
239 Bischoff, Klaus251949 28.31
240 Zaichik, Gennady L251850 32.63
241 Hebden, Mark251851 31.62
242 Ivanov, Igor V251754 42.73
243 Marjanovic, Slavoljub251650 34.73
244 Gligoric, Svetozar251653 66.66
245 Graf, Alexander251557 27.10
246 Polgar, Zsuzsa251550 20.45
247 Veingold, Aleksander251567 35.96
248 Arnason, Jon L251550 28.88
249 Rohde, Michael A251553 30.09
250 Zhuravliov, Valerij251569 50.80
251 Kozlov, V.251461
252 Simic, Radoslav251456 41.31
253 Piket, Jeroen251449 20.67
254 Kantsler, Boris251457 27.45
255 Gruenberg, Hans Ulrich251250 33.72
256 London, Dimitri251165 26.86
257 Baburin, Alexander251162 22.61
258 Petrosian, Arshak B251051 35.79
259 Sahovic, Dragutin251061 49.14
260 Frias, Victor J251055 33.64
261 Schussler, Harry251052 32.27
262 Rausis, Igors251062 28.48
263 Wedberg, Tom251050 35.84
264 Watson, William N251048 27.45
265 Bronstein, David I250958 65.61
266 Zagrebelny, Sergey250859
267 Basin, Leonid250754 31.85
268 Franco Ocampos, Zenon250755 33.38
269 Nijboer, Friso250754 24.34
270 Guseinov, Aidyn250757 37.74
271 Kožul, Zdenko250650 23.36
272 Sellos, Didier250659 32.61
273 Renet, Olivier250550 24.77
274 Dizdar, Goran250551 30.82
275 Lukacs, Peter250550 39.22
276 Stohl, Igor250551 25.01
277 Wolff, Patrick G250552 21.62
278 Gruenfeld, Yehuda250454 33.59
279 Espig, Lutz250454 40.73
280 Unzicker, Wolfgang250457 64.26
281 Mortensen, Erling250452 34.48
282 Barbero, Gerardo F250352 28.11
283 Byrne, Robert E250262 61.44
284 Sadler, Matthew250258 15.37
285 Stoica, Valentin250267 39.62
286 García Gonzáles, Guillermo250252 35.81
287 Reyes, Juan250261 26.43
288 Tunik, Gennady250159 36.34
289 Rivas Pastor, Manuel250154 29.21
290 Pytel, Krzysztof250166 44.37
291 Illescas Cordoba, Miguel250151 23.82
292 Efimov, Igor250063 29.04
293 Palatnik, Semen A249955 39.51
294 Serper, Grigory249954 20.04
295 Andrianov, Nikolai249968 27.78
296 Seret, Jean Luc249961
297 Hickl, Joerg249950 24.45
298 Lein, Anatoly249954 58.51
299 Okhotnik, Vladimir249957 39.59
300 Piskov, Yury249856 27.96
301 Ye Jiangchuan249860 28.86
302 Meister, Yakov249765 34.05
303 Gomez Baillo, Jorge H249758 30.45
304 Rodriguez Vargas, Orestes249757 46.24
305 Malisauskas, Vidmantas249655 26.15
306 Womacka, Mathias249666 23.26
307 Ostermeyer, Peter249561 45.96
308 Ye Rongguang249563 25.98
309 Brunner, Lucas249551 22.34
310 Tischbierek, Raj249552 27.02
311 Gutman, Lev249550 44.01
312 Ivkov, Borislav249454 55.88
313 Vogt, Lothar H249350 37.70
314 Popchev, Milko249352 24.88
315 Norwood, David249355 20.98
316 Kotronias, Vasilios249350 25.10
317 Garcia Palermo, Carlos249253 35.83
318 Kishnev, Sergey249266 32.91
319 Zilberman, Nathan R249264 49.41
320 Belov, Igor249159
321 Plaskett, Jim249152 29.53
322 Sideif Sade, Fikret I249161 37.74
323 Tisdall, Jonathan D249151 31.09
324 Machulsky, Anatoly D249160 33.02
325 Matulovic, Milan249158 54.30
326 Loginov, Valery A249157 33.80
327 Lau, Ralf249049 29.94
328 Reshevsky, Samuel H248961 77.84
329 Titov, German248858 26.43
330 Foisor, Ovidiu248856 30.48
331 Kraidman, Yair248865 56.91
332 Akhmilovskaya, Elena248863
333 Tolnai, Tibor248750 25.02
334 Tseitlin, Mikhail S248753 42.29
335 Zilberstein, Valery I248771 46.46
336 Pekarek, Ales248652 27.79
337 Drasko, Milan248650 26.81
338 Ioseliani, Nana248658 27.63
339 Hansen, Lars Bo248650 21.02
340 Filipenko, Alexander V248673 40.57
341 Palac, Mladen248563 18.62
342 Spacek, Petr248573 35.59
343 McKay, Roderick M248567 37.63
344 Malevinsky, Alexander A248568 39.59
345 Mascarinas, Rico248556 36.58
346 Kouatly, Bachar248451 31.57
347 Kosten, Anthony C248449 31.18
348 Moroz, Alexander248464 28.70
349 Sunye Neto, Jaime248457 32.41
350 Ornstein, Axel248461 37.43
351 Sznapik, Aleksander248251 38.64
352 Ionescu, Constantin248256 31.05
353 Lukov, Valentin248256 33.80
354 Yuferov, Sergey N248266 43.82
355 Magomedov, Magaram248167 23.36
356 Trapl, Jindrich248173 47.52
357 Varavin, Viktor248167 22.35
358 Vera, Reynaldo248154 28.73
359 Wojtkiewicz, Aleksander248054 26.71
360 Tringov, Georgy P248059 52.56
361 Brooks, Michael A247961 28.45
362 Lin Ta247963 26.66
363 Ree, Hans247959 45.04
364 Fokin, Sergey247971 33.95
365 Murshed, Niaz247958 23.38
366 Granda Zuńiga, Julio E247951 22.60
367 Levitt, Jonathan247850 26.32
368 Jansa, Vlastimil247850 46.84
369 Dzuban, Oleg I247865
370 Lombardy, William J247874 51.82
371 Řgaard, Leif247773 37.73
372 Shabalov, Alexander247752 22.05
373 Flear, Glenn C247750 30.63
374 Motwani, Paul247756 27.30
375 Braga, Fernando247756 31.22
376 Meduna, Eduard247750 39.05
377 Rytshagov, Mikhail247664 21.88
378 Poldauf, Dirk247669 24.04
379 Ilincic, Zlatko247652 21.39
380 Hazai, Laszlo247653 36.29
381 Rubinetti, Jorge A247558 44.50
382 Ghinda, Mihail Viorel247558 40.18
383 Hecht, Hans-Joachim247563 50.67
384 Arbakov, Valentin247564 37.67
385 Velikov, Petar247453 38.50
386 Georgiev, Krum247454 31.35
387 Martinovic, Slobodan247456 44.18
388 Gruenenwald, Joerg247361 24.32
389 Skembris, Spyridon247353 31.61
390 Padevsky, Nikola B247362 56.34
391 Abramovic, Boško247250 38.63
392 Vukic, Milan247158 46.11
393 Gleizerov, Evgeny247065 26.53
394 Petkevich, Jusefs247066 48.78
395 Li Zunian247075 31.73
396 Kogan, Boris246963
397 Marin, Mihail246955 24.44
398 Mohr, Stefan246950 21.93
399 Rechlis, Gad246956 22.65
400 Rogulj, Branko246963 38.16
401 Schmidt, Wlodzimierz246950 46.47
402 Ambroz, Jan246868 35.28
403 Tempone, Marcelo246862 27.06
404 Fernandez Garcia, Jose Luis246859 35.41
405 Reefschlaeger, Helmut246759 45.48
406 Kuijf, Marinus246753 29.63
407 Kallai, Gabor246757 30.61
408 Ermenkov, Evgenij246754 40.00
409 Temirbaev, Serik246760
410 Mainka, Romuald246755 26.37
411 Vallifuoco, Giacomo246668 32.40
412 Klinger, Josef246650 22.31
413 Gurevich, Dmitry246651 33.05
414 Vilela, Jose Luis246656 36.53
415 Davies, Nigel R246549 29.16
416 Szabó, László246573 72.53
417 Rukavina, Josip246563 46.84
418 Legky, Nikolay A246460 34.47
419 Blatny, Pavel246450 21.27
420 Valkesalmi, Kimmo246455 28.41
421 Dueball, Juergen246468 44.50
422 Vokác, Marek246453 30.81
423 Hertneck, Gerald246453 26.03
424 Arkell, Keith C246452 28.73
425 Makarov, Marat246360 26.40
426 Orso, Miklos246262 33.31
427 Veinger, Itzhak246267 51.23
428 Marangunic, Srdjan246266 45.91
429 Ernst, Thomas246251 29.12
430 Szekely, Peter246257 34.64
431 Barbulescu, Dan246166 25.27
432 Piasetski, Leon David246168
433 Saltaev, Mihail246162 26.86
434 Ryskin, Alexander246175 26.72
435 Ekstroem, Roland246057 33.36
436 Knezevic, Milorad245957 52.91
437 Lechtynsky, Jiri245953 41.85
438 Bilek, István245861 57.13
439 Staniszewski, Piotr245856 23.07
440 Kapengut, Albert Z245770 45.24
441 Mednis, Edmar J245754 52.52
442 Cabrilo, Goran245752 31.24
443 Haba, Petr245651 24.73
444 Negulescu, Adrian245664 28.30
445 Thorhallsson, Throstur245558 20.53
446 Rajkovic, Dusan245552 47.29
447 Pribyl, Josef245553 41.96
448 Djuric, Stefan245550 34.18
449 Cramling, Dan245568 30.65
450 Neckar, Lubomir245571 39.16
451 Cramling, Pia245453 26.44
452 Wirthensohn, Heinz245457 38.40
453 Sigurjónsson, Gudmundur245469 42.01
454 Nemet, Ivan245357 46.46
455 Verduga, Denis Homero245359
456 Stempin, Pawel245351 30.21
457 Popov, Luben245364 53.67
458 Ledger, Andrew245367 20.35
459 Gurgenidze, Bukhuti I245361 55.88
460 Krnic, Zdenko245261 41.99
461 Kovacevic, Predrag245273 29.06
462 Plachetka, Jan245149 44.62
463 Semkov, Semko245155 29.59
464 Rachels, Stuart245170 20.01
465 Gallagher, Joseph G245152 25.40
466 Klundt, Klaus245158 47.76
467 Ziatdinov, Raset245168 30.76
468 Djukic, Zeljko245170 30.30
469 Schlosser, Philipp245156 21.11
470 Sendera, Jaroslaw245073 24.43
471 Strikovic, Aleksa244954 28.38
472 Wolf, Volker244962 32.06
473 Armas, Julius244958 34.43
474 Schneider, Lars Ake244959
475 Graf, Juergen244959 26.50
476 Hoi, Carsten244949 32.70
477 Karolyi, Tibor Jr244851 27.87
478 Rakic, Tomislav244869 54.88
479 Luther, Thomas244855 19.90
480 Conquest, Stuart244849 22.58
481 Nikolic, Zivoslav244753 35.80
482 Zelcic, Robert244773 24.02
483 Kiik, Kalle244760 26.64
484 Renman, Nils Gustaf244761
485 Kuczynski, Robert244651 23.45
486 Brestian, Egon244658 25.17
487 Filipovic, Branko244657 31.98
488 Ardiansyah, Haji244665 37.82
489 Brynell, Stellan244556 27.01
490 Hawelko, Marek244553 30.14
491 Lima, Darcy244559 27.36
492 Hug, Werner244559 37.05
493 Lanc, Alois244553 41.62
494 Winants, Luc244453 26.74
495 Gdanski, Jacek244461 18.83
496 Cifuentes Parada, Roberto244454 31.77
497 Nowak, Ignacy244367 40.72
498 Horvath, Tamas244357 37.93
499 Dizdarevic, Emir244352 31.49
500 Khasin, Alexander244363 38.42

These ratings, calculated as of September 30, 1989, incorporate all games (against rated opponents) played in the time between October 1, 1988 and September 30, 1989, along with the ratings that were already calculated as of September 30, 1988. 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 September 30, 1989. This represents the player's estimated strength on October 1, 1989.

+/- 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 October 1, 1989. The +/- value represents the standard deviation of that estimate; the player's true strength on October 1, 1989 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 October 1, 1989. 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 September 30, 1989. 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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