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Top 10 active players as of August 31, 1989


Top 500 active players as of August 31, 1989

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28174853.5% #226.38
2 Karpov, Anatoly E28004735.1% #338.27
3 Timman, Jan H2725482.8% #1537.71
4 Short, Nigel D2709471.5% #2124.25
5 Ivanchuk, Vassily2709491.7% #2220.45
6 Beliavsky, Alexander G2698480.8% #2735.71
7 Salov, Valery B2697501.0% #2825.26
8 Korchnoi, Viktor L2677470.2% #4058.44
9 Gurevich, Mikhail N2677490.3% #4130.53
10 Hübner, Robert2673480.3% #4440.82
11 Andersson, Ulf2670480.2% #4638.18
12 Dolmatov, Sergey V2667490.2% #4930.53
13 Speelman, Jonathan S2666480.1% #5032.91
14 Ehlvest, Jaan2665480.1% #5026.88
15 Gelfand, Boris2664490.2% #5221.19
16 Ljubojevic, Ljubomir2663480.1% #5238.83
17 Tal, Mikhail2659480.1% #5552.81
18 Portisch, Lajos2658480.1% #5752.41
19 Dreev, Alexey2656500.1% #5920.61
20 Dautov, Rustem2655520.2% #6123.76
21 Azmaiparashvili, Zurab A2653500.1% #6229.46
22 Jussupow, Artur M2651480.1% #6229.55
23 Polugaevsky, Lev A2650500.1% #6454.78
24 Tukmakov, Vladimir B2649490.1% #6643.46
25 Dvoiris, Semen I2649540.1% #6930.83
26 Agdestein, Simen2649510.1% #6722.29
27 Yudasin, Leonid G2647500.1% #6830.06
28 Nikolic, Predrag264548 #6828.97
29 Ribli, Zoltán2644480.1% #7037.98
30 Chernin, Alexander M264349 #7129.48
31 Lputian, Smbat G263849 #7631.55
32 Gavrikov, Victor N263549 #7932.09
33 Vladimirov, Evgeny Y2635530.1% #8332.61
34 Gulko, Boris F263349 #8142.56
35 Georgiev, Kiril263349 #8223.76
36 Nunn, John D M263348 #8234.35
37 Khalifman, Alexander263249 #8323.62
38 Sveshnikov, Evgeny E263052 #8739.55
39 Vaganian, Rafael A263048 #8537.88
40 Sax, Gyula262348 #9238.20
41 Aseev, Konstantin N262354 #9628.86
42 Vyzmanavin, Alexey262352 #9629.66
43 Psakhis, Lev B262047 #9430.76
44 Smirin, Ilia262051 #9821.61
45 Seirawan, Yasser261848 #9829.44
46 Timoshchenko, Gennady261850 #9940.34
47 Sokolov, Andrey Y261849 #9826.45
48 Christiansen, Larry M261849 #9933.18
49 Yurtaev, Leonid261652 #10330.33
50 Malaniuk, Vladimir P261648 #10032.11
51 Dorfman, Iosif D261551 #10337.33
52 Bareev, Evgeny261550 #10322.78
53 Pigusov, Evgeny261551 #10328.42
54 Anand, Viswanathan261451 #10419.72
55 Spassky, Boris V261348 #10452.59
56 Balashov, Yury S261149 #10640.47
57 Ubilava, Elizbar E261152 #11139.01
58 Ivanov, Alexander V260854 #11433.33
59 Eingorn, Viacheslav S260649 #11332.77
60 Hort, Vlastimil260449 #11445.64
61 Smyslov, Vassily V260451 #11568.44
62 Dokhoian, Yury260449 #11624.85
63 Razuvaev, Yury S260050 #12143.89
64 Dzindzichashvili, Roman Y259954 #12545.32
65 Torre, Eugenio259851 #12237.82
66 Kruppa, Yuri259758 #13025.19
67 Epishin, Vladimir259752 #12524.14
68 Smagin, Sergey259749 #12330.97
69 Romanishin, Oleg M259648 #12337.64
70 Kharitonov, Andrey Y259449 #12630.41
71 Rashkovsky, Nukhim N259251 #13043.37
72 Kuzmin, Gennady P259156 #13443.62
73 Hjartarson, Jóhann259148 #12826.56
74 deFirmian, Nicholas E259049 #13032.10
75 Oll, Lembit258850 #13223.36
76 Naumkin, Igor258754 #13724.06
77 Fedorowicz, John P258549 #13630.92
78 Lerner, Konstantin Z258450 #13739.51
79 Krasenkow, Michal258452 #13925.80
80 Rozentalis, Eduardas258451 #13726.26
81 Larsen, Bent258349 #13754.49
82 Miles, Anthony J258348 #13734.36
83 van der Wiel, John T H258248 #13730.06
84 Yermolinsky, Alex V258253 #14131.39
85 Sorokin, Maxim258160 #14721.61
86 Ionov, Sergey258059 #14827.65
87 Taimanov, Mark E258061 #14863.57
88 Benjamin, Joel L258049 #14125.47
89 Vasiukov, Evgeny A257953 #14456.49
90 Vaisser, Anatoli257950 #14440.49
91 Nogueiras, Jesus257848 #14230.12
92 Smejkal, Jan257851 #14443.44
93 Neverov, Valery257853 #14625.19
94 Kholmov, Ratmir D257851 #14464.30
95 Pintér, József257851 #14535.81
96 Pétursson, Margeir257748 #14429.54
97 Ftácnik, Lubomír257549 #14631.84
98 Hansen, Curt257449 #14724.95
99 Podgaets, Mikhail Y257473 #16242.11
100 Olafsson, Helgi257449 #14733.04
101 Spraggett, Kevin B257352 34.81
102 Goldin, Alexander257350 24.51
103 Karlsson, Lars257351 34.14
104 Sosonko, Gennadi257252 46.29
105 Huzman, Alexander257251 27.39
106 Kovalev, Andrei257157 27.82
107 Tseshkovsky, Vitaly V257150 44.93
108 Arkhipov, Sergey256957 35.19
109 Adorján, András256951 39.42
110 Makarichev, Sergey Y256955 35.79
111 Lobron, Eric256949 29.32
112 Chandler, Murray G256849 29.41
113 Kupreichik, Viktor D256851 40.16
114 Shirov, Alexei256753 17.16
115 Kamsky, Gata256554 15.25
116 Kveinys, Aloyzas256560 27.14
117 Sher, Miron N256458 37.17
118 Novikov, Igor A256451 27.27
119 Timoshenko, Georgy256356 23.25
120 Ulibin, Mikhail256351 18.25
121 Kavalek, Lubomir256359 46.06
122 Shabanov, Yury F256268 51.80
123 Adams, Michael256150 17.79
124 Kuzmin, Alexey256154 26.48
125 Geller, Efim P256150 64.50
126 Gorelov, Sergey G256059 32.04
127 Darga, Klaus V256068 55.52
128 Akopian, Vladimir255952 17.73
129 Yakovich, Yuri255956 26.75
130 Kudrin, Sergey255950 29.98
131 Hulak, Krunoslav255851 38.27
132 Browne, Walter S255852 40.64
133 Bönsch, Uwe255649 30.88
134 Shereshevsky, Mikhail I255674 39.36
135 Todorcevic, Miodrag255551 48.81
136 Didishko, Vereslav255474 40.39
137 Kengis, Edvins255455 30.39
138 Panchenko, Alexander N255455 35.90
139 Bikhovsky, Avigdor I255367 34.49
140 Sokolov, Ivan255349 21.22
141 Popovic, Petar255349 30.55
142 Kindermann, Stefan255348 29.68
143 Lalic, Bogdan255251 25.48
144 Hellers, Ferdinand255250 20.59
145 Khenkin, Igor255157 21.44
146 Kalinitschew, Sergey255160 33.58
147 Knaak, Rainer F255150 36.46
148 Mikhalchishin, Adrian B254949 34.79
149 Janjgava, Lasha254952 19.32
150 Sturua, Zurab254969 30.23
151 Greenfeld, Alon254952 25.37
152 Giorgadze, Giorgi254954 24.89
153 Tiviakov, Sergei254861 16.55
154 Liberzon, Vladimir M254872 52.44
155 Magerramov, Elmar S254753 31.39
156 Govedarica, Radovan254772 41.55
157 Barua, Dibyendu254754 22.84
158 Karpman, Vadim254755 24.30
159 Najdorf, Miguel254663 79.38
160 Gaprindashvili, Nona254662 48.33
161 Soppe, Guillermo254662 28.95
162 Quinteros, Miguel A254461 41.68
163 Kaidanov, Gregory S254351 29.89
164 Dlugy, Maxim254349 23.59
165 Savon, Vladimir A254254 48.92
166 Duer, Arne254266 30.14
167 Kiselev, Sergey254258 27.96
168 Kramnik, Vladimir254263 14.18
169 Rogers, Ian254150 29.19
170 Ivanovic, Božidar254151 43.02
171 Murey, Yakov254151 48.08
172 Anastasian, Ashot254153 25.12
173 Suba, Mihai254051 42.25
174 Chekhov, Valery A254050 33.76
175 Kurajica, Bojan254067 41.79
176 Mestel, A Jonathan254057 32.47
177 Van der Sterren, Paul253949 33.46
178 Adianto, Utut253960 24.46
179 Morovic Fernández, Iván E253853 26.44
180 Moskalenko, Viktor253854 28.74
181 Zlotnik, Boris A253862 42.88
182 Panno, Oscar R253752 54.46
183 Henley, Ron W253672 32.74
184 Glek, Igor V253654 27.82
185 Lanka, Zigurds253657 29.28
186 Uhlmann, Wolfgang253651 54.42
187 Mirkovic, Slobodan253570 31.09
188 Csom, István253450 49.25
189 Wahls, Matthias253450 21.60
190 Alburt, Lev O253352 44.03
191 Komarov, Dimitri253359 20.75
192 Minasian, Artashes253259 22.61
193 Gheorghiu, Florin253252 45.40
194 Kovacevic, Vladimir253150 47.43
195 Kochiev, Alexander253152 33.43
196 Pfleger, Helmut253058 46.07
197 Mnatsakanian, Eduard A253069 50.73
198 Faragó, Iván253049 43.41
199 Velimirovic, Dragoljub253051 47.30
200 King, Daniel J252949 26.01
201 Rodriguez, Amador252949 32.97
202 Ninov, Kiril252954 20.90
203 Mochalov, Evgeny V252971 37.84
204 Georgadze, Tamaz V252862 41.81
205 Gruenberg, Hans Ulrich252852 33.64
206 Tseitlin, Mark D252860 45.93
207 Orlov, Georgi252859
208 Bjelajac, Milan252868 41.46
209 Nikolac, Juraj252758 57.36
210 Wilder, Michael252750 26.95
211 Cvitan, Ognjen252750 27.89
212 Inkiov, Ventzislav252752 33.28
213 Ruban, Vadim252653 25.22
214 Zapata, Alonso252651 31.03
215 Gofshtein, Leonid D252565 36.36
216 Gipslis, Aivars252559 52.56
217 Mokrý, Karel252451 30.57
218 Petrienko, Vladimir252464 34.48
219 Horvath, Jozsef252450 25.05
220 Donchev, Dimitar I252455 31.11
221 Bass, Leonid252362 32.25
222 Schussler, Harry252353 32.19
223 Milos, Gilberto252353 25.84
224 Gufeld, Eduard E252254 53.45
225 Cebalo, Mišo252250 44.57
226 Zaichik, Gennady L252250 32.55
227 Groszpeter, Attila252250 29.23
228 Bagirov, Vladimir K252252 53.04
229 Hodgson, Julian M252048 26.10
230 Barlov, Dragan252051 32.59
231 Gligoric, Svetozar251953 66.58
232 Cámpora, Daniel H251949 32.17
233 Antunes, Antonio251956 27.57
234 Shneider, Aleksandr251958 27.28
235 Savchenko, Stanislav251854 22.61
236 Arnason, Jon L251849 28.80
237 Hebden, Mark251851 31.54
238 Vitolinš, Alvis251864 43.21
239 Rohde, Michael A251752 30.01
240 Lukin, Andrei M251756 41.01
241 Piket, Jeroen251749 20.59
242 Xu Jun251656 26.95
243 Ivanov, Igor V251554 42.65
244 Bischoff, Klaus251549 28.23
245 Damljanovic, Branko251449 28.21
246 Bronstein, David I251457 65.53
247 Marjanovic, Slavoljub251450 34.65
248 Veingold, Aleksander251467 35.89
249 Simic, Radoslav251356 41.23
250 Yrjola, Jouni251251 29.85
251 Zhuravliov, Valerij251269 50.72
252 Polgar, Zsuzsa251150 20.37
253 Watson, William N251148 27.37
254 Guseinov, Aidyn251157 37.66
255 Rausis, Igors251062 28.40
256 London, Dimitri251064 26.78
257 Sahovic, Dragutin251061 49.06
258 Espig, Lutz251053 40.65
259 Lukacs, Peter251049 39.14
260 Basin, Leonid251053 31.77
261 Zagrebelny, Sergey250960
262 Petrosian, Arshak B250951 35.71
263 Baburin, Alexander250962 22.53
264 Chiburdanidze, Maia G250851 28.62
265 Wedberg, Tom250850 35.76
266 Frias, Victor J250855 33.56
267 Yuneev, Alexey250864
268 Serper, Grigory250753 19.96
269 Nijboer, Friso250754 24.26
270 Sellos, Didier250759 32.53
271 Graf, Alexander250758 27.02
272 Dizdar, Goran250551 30.74
273 Wolff, Patrick G250552 21.54
274 Gruenfeld, Yehuda250554 33.51
275 Barbero, Gerardo F250552 28.03
276 Franco Ocampos, Zenon250455 33.30
277 García Gonzáles, Guillermo250452 35.73
278 Kantsler, Boris250456 27.37
279 Tischbierek, Raj250452 26.93
280 Unzicker, Wolfgang250457 64.18
281 Sadler, Matthew250458 15.29
282 Byrne, Robert E250361 61.36
283 Stoica, Valentin250167 39.54
284 Hickl, Joerg250050 24.37
285 Illescas Cordoba, Miguel250051 23.74
286 Reyes, Juan250061 26.35
287 Rivas Pastor, Manuel250054 29.13
288 Renet, Olivier249950 24.69
289 Kožul, Zdenko249950 23.28
290 Tunik, Gennady249959 36.26
291 Efimov, Igor249963 28.95
292 Ye Jiangchuan249960 28.78
293 Palatnik, Semen A249855 39.43
294 Pytel, Krzysztof249866 44.29
295 Kozlov, V.249862
296 Mortensen, Erling249852 34.40
297 Stohl, Igor249851 24.92
298 Kotronias, Vasilios249750 25.02
299 Lein, Anatoly249754 58.43
300 Andrianov, Nikolai249668 27.70
301 Rodriguez Vargas, Orestes249657 46.16
302 Piskov, Yury249656 27.89
303 Womacka, Mathias249566 23.18
304 Lukov, Valentin249555 33.72
305 Plaskett, Jim249552 29.45
306 Gutman, Lev249550 43.92
307 Ostermeyer, Peter249561 45.89
308 Ivkov, Borislav249554 55.80
309 Garcia Palermo, Carlos249552 35.75
310 Ye Rongguang249463 25.91
311 Brunner, Lucas249451 22.26
312 Yuferov, Sergey N249467 43.74
313 Vogt, Lothar H249450 37.62
314 Seret, Jean Luc249361
315 Popchev, Milko249352 24.80
316 Meister, Yakov249265 33.97
317 Sznapik, Aleksander249151 38.56
318 Gomez Baillo, Jorge H249157 30.37
319 Malisauskas, Vidmantas249155 26.07
320 Tisdall, Jonathan D249051 31.01
321 Sideif Sade, Fikret I249061 37.66
322 Belov, Igor249059
323 Reshevsky, Samuel H248961 77.76
324 Norwood, David248955 20.91
325 Zilberman, Nathan R248964 49.33
326 Padevsky, Nikola B248862 56.26
327 Lau, Ralf248849 29.87
328 Kraidman, Yair248865 56.83
329 Matulovic, Milan248858 54.22
330 Loginov, Valery A248757 33.72
331 Mascarinas, Rico248757 36.50
332 Palac, Mladen248763 18.54
333 Kishnev, Sergey248766 32.83
334 Akhmilovskaya, Elena248663
335 Hansen, Lars Bo248650 20.93
336 Drasko, Milan248650 26.73
337 McKay, Roderick M248567 37.55
338 Filipenko, Alexander V248573 40.49
339 Titov, German248558 26.35
340 Machulsky, Anatoly D248559 32.93
341 Kosten, Anthony C248449 31.10
342 Kouatly, Bachar248451 31.49
343 Foisor, Ovidiu248356 30.40
344 Malevinsky, Alexander A248368 39.51
345 Tseitlin, Mikhail S248253 42.21
346 Ornstein, Axel248261 37.35
347 Meduna, Eduard248251 38.97
348 Ghinda, Mihail Viorel248258 40.10
349 Hazai, Laszlo248152 36.21
350 Ionescu, Constantin248156 30.96
351 Pekarek, Ales248053 27.71
352 Vera, Reynaldo248054 28.65
353 Sunye Neto, Jaime248057 32.33
354 Magomedov, Magaram248067 23.28
355 Wojtkiewicz, Aleksander248054 26.63
356 Tolnai, Tibor248050 24.93
357 Varavin, Viktor247967 22.27
358 Ree, Hans247958 44.95
359 Moroz, Alexander247964 28.62
360 Mohr, Stefan247950 21.86
361 Flear, Glenn C247950 30.55
362 Hecht, Hans-Joachim247964 50.59
363 Jansa, Vlastimil247951 46.76
364 Lin Ta247863 26.58
365 Brooks, Michael A247861 28.37
366 Murshed, Niaz247858 23.30
367 Lombardy, William J247774 51.74
368 Řgaard, Leif247673 37.65
369 Granda Zuńiga, Julio E247651 22.52
370 Braga, Fernando247656 31.14
371 Levitt, Jonathan247650 26.24
372 Motwani, Paul247656 27.22
373 Georgiev, Krum247654 31.27
374 Arkell, Keith C247652 28.65
375 Poldauf, Dirk247669 23.95
376 Rytshagov, Mikhail247664 21.80
377 Dzuban, Oleg I247565
378 Reefschlaeger, Helmut247558 45.40
379 Rubinetti, Jorge A247557 44.42
380 Marin, Mihail247456 24.36
381 Davies, Nigel R247449 29.08
382 Ioseliani, Nana247456 27.55
383 Mainka, Romuald247455 26.29
384 Zilberstein, Valery I247470 46.38
385 Velikov, Petar247353 38.42
386 Skembris, Spyridon247253 31.53
387 Kuijf, Marinus247253 29.55
388 Martinovic, Slobodan247257 44.10
389 Abramovic, Boško247150 38.55
390 Vukic, Milan247058 46.03
391 Shabalov, Alexander247052 21.96
392 Tringov, Georgy P247058 52.48
393 Petkevich, Jusefs247066 48.70
394 Klinger, Josef247050 22.23
395 Fokin, Sergey246972 33.88
396 Haba, Petr246953 24.65
397 Schmidt, Wlodzimierz246850 46.39
398 Li Zunian246875 31.65
399 Gleizerov, Evgeny246865 26.45
400 Kallai, Gabor246757 30.53
401 Rogulj, Branko246763 38.08
402 Fernandez Garcia, Jose Luis246659 35.33
403 Ermenkov, Evgenij246654 39.92
404 Gurevich, Dmitry246651 32.97
405 Tempone, Marcelo246562 26.98
406 Kogan, Boris246564
407 Okhotnik, Vladimir246556 39.51
408 Vallifuoco, Giacomo246568 32.32
409 Valkesalmi, Kimmo246555 28.33
410 Dueball, Juergen246569 44.42
411 Temirbaev, Serik246460
412 Rukavina, Josip246463 46.76
413 Szabó, László246473 72.45
414 Hertneck, Gerald246353 25.95
415 Ambroz, Jan246368 35.20
416 Trapl, Jindrich246367 47.44
417 Orso, Miklos246362 33.23
418 Arbakov, Valentin246365 37.59
419 Vokác, Marek246353 30.73
420 Veinger, Itzhak246267 51.15
421 Ernst, Thomas246251 29.04
422 Ekstroem, Roland246257 33.28
423 Szekely, Peter246157 34.56
424 Barbulescu, Dan246165 25.19
425 Ryskin, Alexander246075 26.64
426 Legky, Nikolay A246060 34.39
427 Piasetski, Leon David245968
428 Rechlis, Gad245956 22.57
429 Vilela, Jose Luis245956 36.45
430 Staniszewski, Piotr245956 22.98
431 Hoi, Carsten245850 32.62
432 Pribyl, Josef245854 41.89
433 Zlochevskij, Alexander245870 26.18
434 Negulescu, Adrian245764 28.22
435 Rachels, Stuart245765 19.92
436 Thorhallsson, Throstur245658 20.45
437 Schlosser, Philipp245656 21.03
438 Popov, Luben245664 53.59
439 Mednis, Edmar J245654 52.44
440 Karolyi, Tibor Jr245551 27.79
441 Verduga, Denis Homero245558
442 Blatny, Pavel245550 21.19
443 Lechtynsky, Jiri245553 41.77
444 Knezevic, Milorad245556 52.83
445 Wirthensohn, Heinz245556 38.32
446 Kapengut, Albert Z245570 45.16
447 Djuric, Stefan245450 34.10
448 Gruenenwald, Joerg245462 24.24
449 Ilincic, Zlatko245453 21.31
450 Makarov, Marat245460 26.32
451 Neckar, Lubomir245371 39.08
452 Cramling, Dan245368 30.57
453 Sigurjónsson, Gudmundur245369 41.93
454 Rajkovic, Dusan245352 47.21
455 Cramling, Pia245353 26.36
456 Cabrilo, Goran245352 31.16
457 Semkov, Semko245355 29.51
458 Plachetka, Jan245350 44.54
459 Filipovic, Branko245357 31.90
460 Ledger, Andrew245367 20.27
461 Schneider, Bernd245365 24.39
462 Krnic, Zdenko245261 41.91
463 Gallagher, Joseph G245252 25.32
464 Brynell, Stellan245256 26.92
465 Gurgenidze, Bukhuti I245161 55.80
466 Marangunic, Srdjan245166 45.83
467 Klundt, Klaus245058 47.68
468 Djukic, Zeljko244970 30.22
469 Bilek, István244960 57.05
470 Strikovic, Aleksa244954 28.30
471 Kovacevic, Predrag244973 28.98
472 Conquest, Stuart244949 22.50
473 Dizdarevic, Emir244953 31.41
474 Armas, Julius244858 34.35
475 Hawelko, Marek244853 30.06
476 Schneider, Lars Ake244859
477 Sendera, Jaroslaw244873 24.35
478 Wolf, Volker244862 31.98
479 Moldobaev, Emelbek244859
480 Cifuentes Parada, Roberto244853 31.69
481 Stempin, Pawel244850 30.13
482 Graf, Juergen244858 26.42
483 Lanc, Alois244753 41.54
484 Leski, Marc244773 28.18
485 Zelcic, Robert244773 23.94
486 Rakic, Tomislav244769 54.80
487 Kiik, Kalle244660 26.56
488 Brestian, Egon244658 25.09
489 Lima, Darcy244659 27.28
490 Nikolic, Zivoslav244653 35.72
491 Ardiansyah, Haji244565 37.74
492 Renman, Nils Gustaf244561
493 Saltaev, Mihail244462 26.78
494 Prandstetter, Eduard244453 40.71
495 Kuligowski, Adam244365 33.69
496 Kuczynski, Robert244351 23.37
497 Winants, Luc244353 26.66
498 Casper, Thomas244358 30.46
499 Hug, Werner244359 36.97
500 Khasin, Alexander244263 38.34

These ratings, calculated as of August 31, 1989, incorporate all games (against rated opponents) played in the time between September 1, 1988 and August 31, 1989, along with the ratings that were already calculated as of August 31, 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 August 31, 1989. This represents the player's estimated strength on September 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 September 1, 1989. The +/- value represents the standard deviation of that estimate; the player's true strength on September 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 September 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 August 31, 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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