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Top 10 active players as of March 31, 1989


Top 500 active players as of March 31, 1989

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28404867.6% #225.96
2 Karpov, Anatoly E28044727.5% #337.86
3 Salov, Valery B2706500.9% #2324.85
4 Short, Nigel D2700470.5% #2523.83
5 Timman, Jan H2696470.5% #2837.30
6 Ivanchuk, Vassily2696490.5% #3020.04
7 Beliavsky, Alexander G2688480.3% #3335.29
8 Korchnoi, Viktor L2686470.2% #3558.02
9 Ljubojevic, Ljubomir2674470.1% #4438.41
10 Hübner, Robert2673480.1% #4540.40
11 Andersson, Ulf2671480.1% #4537.76
12 Speelman, Jonathan S2669480.1% #4832.50
13 Gelfand, Boris2669510.2% #4920.77
14 Portisch, Lajos2667480.1% #4951.98
15 Tal, Mikhail2667480.1% #4952.39
16 Yudasin, Leonid G2666510.1% #5129.65
17 Ehlvest, Jaan2663480.1% #5326.46
18 Gurevich, Mikhail N2662480.1% #5430.11
19 Jussupow, Artur M265648 #5929.13
20 Polugaevsky, Lev A2655500.1% #6154.36
21 Lputian, Smbat G2652490.1% #6331.13
22 Dreev, Alexey265150 #6520.20
23 Ribli, Zoltán265048 #6437.57
24 Dolmatov, Sergey V264649 #6930.11
25 Nikolic, Predrag264648 #6928.55
26 Gulko, Boris F264648 #6942.14
27 Tukmakov, Vladimir B264649 #7043.04
28 Vaganian, Rafael A264248 #7337.46
29 Gavrikov, Victor N264149 #7431.67
30 Khalifman, Alexander263949 #7723.20
31 Agdestein, Simen263651 #8021.88
32 Chernin, Alexander M263549 #8029.07
33 Dautov, Rustem263553 #8323.34
34 Dvoiris, Semen I263455 #8730.41
35 Nunn, John D M263448 #8233.93
36 Dokhoian, Yury263350 #8324.43
37 Eingorn, Viacheslav S263350 #8332.35
38 Spassky, Boris V263148 #8452.17
39 Malaniuk, Vladimir P263049 #8631.69
40 Azmaiparashvili, Zurab A262953 #9029.04
41 Romanishin, Oleg M262848 #8837.22
42 Sokolov, Andrey Y262648 #8926.03
43 Vladimirov, Evgeny Y262654 #9432.20
44 Kovalev, Andrei262257 #10127.40
45 Christiansen, Larry M262249 #9532.76
46 Vyzmanavin, Alexey262153 #9929.25
47 Psakhis, Lev B262148 #9530.34
48 Georgiev, Kiril262049 #9723.34
49 Sveshnikov, Evgeny E261953 #10139.14
50 Smirin, Ilia261852 #10221.19
51 Sax, Gyula261849 #9937.79
52 Smyslov, Vassily V261650 #10368.02
53 Yurtaev, Leonid261653 #10529.91
54 Seirawan, Yasser261548 #10229.02
55 Pigusov, Evgeny261351 #10527.99
56 Balashov, Yury S261349 #10540.05
57 Bareev, Evgeny261150 #10822.36
58 Dorfman, Iosif D261051 #11036.91
59 Hjartarson, Jóhann261048 #10726.15
60 Hort, Vlastimil260849 #11045.22
61 Anand, Viswanathan260650 #11319.30
62 Torre, Eugenio260550 #11537.41
63 Ivanov, Alexander V260555 #11832.91
64 Smagin, Sergey260350 #11730.56
65 Ubilava, Elizbar E260055 #12438.59
66 Aseev, Konstantin N259853 #12428.45
67 Razuvaev, Yury S259750 #12443.47
68 Kamsky, Gata259755 #12714.83
69 Goldin, Alexander259651 #12524.09
70 Kruppa, Yuri259558 #13224.78
71 Kharitonov, Andrey Y259449 #12729.98
72 Lerner, Konstantin Z259350 #12939.09
73 Kuzmin, Gennady P259156 #13343.20
74 Naumkin, Igor259055 #13423.64
75 Panchenko, Alexander N259056 #13635.49
76 Nogueiras, Jesus258948 #13029.70
77 Kveinys, Aloyzas258961 #13926.73
78 Tseshkovsky, Vitaly V258951 #13344.52
79 Fedorowicz, John P258749 #13330.51
80 Miles, Anthony J258748 #13333.93
81 Yermolinsky, Alex V258752 #13730.96
82 Huzman, Alexander258653 #13826.97
83 Vaisser, Anatoli258552 #13640.07
84 Dzindzichashvili, Roman Y258553 #13844.90
85 Rozentalis, Eduardas258552 #13825.84
86 Podgaets, Mikhail Y258472 #15341.69
87 van der Wiel, John T H258348 #13629.64
88 Lobron, Eric258349 #13828.90
89 Timoshchenko, Gennady258251 #14039.92
90 Giorgadze, Giorgi258155 #14424.47
91 Adorján, András258051 #14238.99
92 Rashkovsky, Nukhim N258052 #14342.95
93 Oll, Lembit257951 #14322.93
94 Gorelov, Sergey G257962 #15131.62
95 Epishin, Vladimir257954 #14623.72
96 Kupreichik, Viktor D257851 #14339.74
97 deFirmian, Nicholas E257850 #14431.68
98 Pétursson, Margeir257849 #14329.13
99 Geller, Efim P257851 #14464.08
100 Makarichev, Sergey Y257758 #15035.37
101 Chandler, Murray G257748 28.98
102 Krasenkow, Michal257658 25.38
103 Shabanov, Yury F257668 51.39
104 Murey, Yakov257651 47.66
105 Kholmov, Ratmir D257552 63.88
106 Shirov, Alexei257557 16.74
107 Sosonko, Gennadi257552 45.87
108 Neverov, Valery257354 24.78
109 Spraggett, Kevin B257254 34.39
110 Sorokin, Maxim257061 21.19
111 Larsen, Bent257049 54.07
112 Smejkal, Jan257050 43.02
113 Pintér, József256851 35.39
114 Hansen, Curt256849 24.54
115 Benjamin, Joel L256749 25.05
116 Glek, Igor V256655 27.40
117 Kavalek, Lubomir256658 45.64
118 Darga, Klaus V256468 55.10
119 Orlov, Georgi256462
120 Chekhov, Valery A256450 33.34
121 Browne, Walter S256451 40.22
122 Vasiukov, Evgeny A256254 56.07
123 Mikhalchishin, Adrian B256251 34.37
124 Zaichik, Gennady L256151 32.14
125 Olafsson, Helgi256149 32.63
126 Didishko, Vereslav255974 39.97
127 Tseitlin, Mark D255874 45.52
128 Arkhipov, Sergey255758 34.77
129 Ulibin, Mikhail255753 17.83
130 Ionov, Sergey255759 27.23
131 Mestel, A Jonathan255655 32.05
132 Kudrin, Sergey255651 29.57
133 Bikhovsky, Avigdor I255667 34.07
134 Hulak, Krunoslav255651 37.85
135 Csom, István255652 48.83
136 Franco Ocampos, Zenon255558 32.88
137 Bagirov, Vladimir K255454 52.62
138 Ftácnik, Lubomír255449 31.42
139 Karlsson, Lars255451 33.72
140 Hellers, Ferdinand255451 20.18
141 Bönsch, Uwe255349 30.46
142 Shneider, Aleksandr255359 26.86
143 Taimanov, Mark E255268 63.15
144 Greenfeld, Alon255152 24.95
145 Marin, Mihail255155 23.94
146 Janjgava, Lasha255052 18.90
147 Najdorf, Miguel254860 78.95
148 Knaak, Rainer F254749 36.04
149 Sokolov, Ivan254750 20.80
150 Barua, Dibyendu254754 22.43
151 Kuzmin, Alexey254757 26.06
152 Kindermann, Stefan254648 29.26
153 Soppe, Guillermo254662 28.54
154 Novikov, Igor A254651 26.86
155 Gheorghiu, Florin254551 44.98
156 Cebalo, Mišo254550 44.15
157 Todorcevic, Miodrag254451 48.39
158 Kochiev, Alexander254455 33.02
159 Dlugy, Maxim254350 23.17
160 Kengis, Edvins254356 29.96
161 Kaidanov, Gregory S254351 29.47
162 Ruban, Vadim254354 24.80
163 Savchenko, Stanislav254255 22.19
164 Zilberman, Nathan R254272 48.91
165 Quinteros, Miguel A254260 41.26
166 Arnason, Jon L254250 28.38
167 Duer, Arne254166 29.72
168 Cvitan, Ognjen254151 27.47
169 Karpman, Vadim254059 23.88
170 Moskalenko, Viktor254054 28.32
171 Rogers, Ian253949 28.77
172 Timoshenko, Georgy253961 22.83
173 Ivanovic, Božidar253851 42.60
174 Henley, Ron W253770 32.32
175 Yakovich, Yuri253656 26.34
176 Antunes, Antonio253657 27.15
177 Morovic Fernández, Iván E253554 26.02
178 Kurajica, Bojan253565 41.38
179 Lanka, Zigurds253457 28.86
180 Schussler, Harry253453 31.77
181 Pfleger, Helmut253457 45.65
182 Kiselev, Sergey253457 27.55
183 Rodriguez, Amador253349 32.56
184 Zapata, Alonso253350 30.61
185 Adams, Michael253352 17.37
186 Reshevsky, Samuel H253266 77.35
187 Uhlmann, Wolfgang253251 54.01
188 Chiburdanidze, Maia G253251 28.20
189 Wilder, Michael253251 26.54
190 Suba, Mihai253251 41.83
191 Cámpora, Daniel H253250 31.75
192 Gaprindashvili, Nona253160 47.91
193 Lalic, Bogdan253152 25.06
194 Popovic, Petar253150 30.13
195 Gruenberg, Hans Ulrich252954 33.23
196 Kovacevic, Vladimir252851 47.01
197 Adianto, Utut252860 24.04
198 Milos, Gilberto252852 25.42
199 Byrne, Robert E252861 60.94
200 Mokrý, Karel252851 30.15
201 Faragó, Iván252750 42.99
202 Yuferov, Sergey N252769 43.33
203 Gruenfeld, Yehuda252655 33.09
204 Bjelajac, Milan252670 41.05
205 Groszpeter, Attila252651 28.81
206 Hodgson, Julian M252649 25.68
207 Donchev, Dimitar I252554 30.69
208 Velimirovic, Dragoljub252551 46.88
209 Serper, Grigory252453 19.55
210 London, Dimitri252463 26.36
211 Panno, Oscar R252453 54.04
212 Watson, William N252448 26.95
213 Ninov, Kiril252453 20.48
214 Barbero, Gerardo F252352 27.61
215 Mirkovic, Slobodan252369 30.68
216 Liberzon, Vladimir M252370 52.02
217 Bischoff, Klaus252250 27.81
218 Sahovic, Dragutin252267 48.65
219 Zagrebelny, Sergey252259
220 Gligoric, Svetozar252255 66.16
221 Ivanov, Igor V252155 42.23
222 Anastasian, Ashot252156 24.71
223 Gipslis, Aivars252157 52.15
224 Flear, Glenn C252150 30.13
225 Marjanovic, Slavoljub252050 34.23
226 Nikolac, Juraj252058 56.94
227 Petrosian, Arshak B252052 35.29
228 Xu Jun251954 26.54
229 Rohde, Michael A251952 29.60
230 Savon, Vladimir A251956 48.51
231 Damljanovic, Branko251950 27.79
232 Graf, Alexander251956 26.60
233 Sunye Neto, Jaime251858 31.91
234 Gufeld, Eduard E251855 53.03
235 Lukin, Andrei M251858 40.59
236 Moroz, Alexander251862 28.20
237 Vitolinš, Alvis251867 42.79
238 Akopian, Vladimir251853 17.32
239 Baburin, Alexander251862 22.12
240 Sherbakov, Vitaly S251769 33.78
241 Inkiov, Ventzislav251751 32.87
242 Veingold, Aleksander251567 35.47
243 Simic, Radoslav251459 40.81
244 Basin, Leonid251454 31.36
245 Efimov, Igor251462 28.54
246 Barlov, Dragan251250 32.17
247 Govedarica, Radovan251273 41.13
248 Georgadze, Tamaz V251267 41.39
249 Padevsky, Nikola B251169 55.84
250 Petrienko, Vladimir251168 34.06
251 Van der Sterren, Paul251149 33.04
252 Wedberg, Tom251150 35.35
253 Kishnev, Sergey251062 32.41
254 Horvath, Jozsef250950 24.63
255 Frias, Victor J250956 33.14
256 Dizdar, Goran250951 30.32
257 Garcia Palermo, Carlos250851 35.33
258 Unzicker, Wolfgang250857 63.76
259 Kantsler, Boris250863 26.95
260 Renet, Olivier250750 24.28
261 Foisor, Ovidiu250754 29.98
262 Wahls, Matthias250751 21.18
263 Illescas Cordoba, Miguel250652 23.33
264 Tischbierek, Raj250652 26.52
265 Seret, Jean Luc250662
266 Zhuravliov, Valerij250665 50.30
267 Espig, Lutz250554 40.24
268 King, Daniel J250550 25.59
269 Ostermeyer, Peter250561 45.47
270 Jansa, Vlastimil250551 46.34
271 Skembris, Spyridon250555 31.11
272 Bronstein, David I250457 65.12
273 Lein, Anatoly250454 58.01
274 Mohr, Stefan250451 21.44
275 Stoica, Valentin250264 39.13
276 Piket, Jeroen250250 20.18
277 Ivkov, Borislav250254 55.38
278 Ye Jiangchuan250160 28.36
279 Mortensen, Erling250153 33.98
280 Kosic, Dragan250160 19.13
281 Palatnik, Semen A249955 39.01
282 Motwani, Paul249956 26.80
283 Polgar, Zsuzsa249950 19.94
284 Wolff, Patrick G249952 21.13
285 Tseitlin, Mikhail S249957 41.79
286 Stohl, Igor249951 24.51
287 Plaskett, Jim249853 29.04
288 Alburt, Lev O249852 43.61
289 Meyer, E.249774
290 Magerramov, Elmar S249755 30.97
291 Guseinov, Aidyn249757 37.25
292 Vera, Reynaldo249654 28.23
293 Hazai, Laszlo249652 35.80
294 García Gonzáles, Guillermo249651 35.31
295 Nijboer, Friso249559 23.85
296 Andrianov, Nikolai249567 27.28
297 Gofshtein, Leonid D249570 35.94
298 Rodriguez Vargas, Orestes249456 45.74
299 Lukov, Valentin249455 33.30
300 Loginov, Valery A249357 33.30
301 Sher, Miron N249365 36.76
302 Hickl, Joerg249350 23.95
303 Popchev, Milko249352 24.39
304 Ornstein, Axel249357 36.93
305 Yrjola, Jouni249252 29.44
306 Velikov, Petar249253 38.00
307 Ye Rongguang249264 25.49
308 McKay, Roderick M249168 37.14
309 Drasko, Milan249050 26.32
310 Mochalov, Evgeny V249072 37.42
311 Lukacs, Peter249049 38.73
312 Kosten, Anthony C249049 30.69
313 Abramovic, Boško249050 38.13
314 Kotronias, Vasilios248951 24.60
315 Hebden, Mark248951 31.13
316 Vogt, Lothar H248850 37.20
317 Womacka, Mathias248866 22.76
318 Barbulescu, Dan248759 24.77
319 Sideif Sade, Fikret I248761 37.25
320 Ionescu, Constantin248754 30.55
321 Murshed, Niaz248755 22.88
322 Ghinda, Mihail Viorel248657 39.68
323 Lau, Ralf248649 29.45
324 Khenkin, Igor248664 21.03
325 Thorhallsson, Throstur248657 20.03
326 Gutman, Lev248551 43.51
327 Klaric, Zlatko248559 32.44
328 Mainka, Romuald248554 25.88
329 Granda Zuńiga, Julio E248450 22.10
330 Hansen, Lars Bo248451 20.52
331 Ioseliani, Nana248355 27.13
332 Palac, Mladen248364 18.12
333 Meister, Peter248358 22.77
334 Rajkovic, Dusan248355 46.79
335 Brooks, Michael A248260 27.95
336 Rogulj, Branko248264 37.66
337 Akhmilovskaya, Elena248263
338 Gomez Baillo, Jorge H248257 29.94
339 Tringov, Georgy P248258 52.07
340 Lin Ta248163 26.17
341 Wojtkiewicz, Aleksander248054 26.21
342 Kalinitschew, Sergey247963 33.16
343 Matulovic, Milan247859 53.81
344 Martinovic, Slobodan247857 43.68
345 Rivas Pastor, Manuel247856 28.72
346 Cifuentes Parada, Roberto247853 31.28
347 Sznapik, Aleksander247852 38.14
348 Davies, Nigel R247750 28.67
349 Klinger, Josef247750 21.82
350 Haba, Petr247753 24.23
351 Rubinetti, Jorge A247657 43.99
352 Georgiev, Krum247653 30.85
353 Ernst, Thomas247650 28.62
354 Kraidman, Yair247575 56.41
355 Gleizerov, Evgeny247565 26.03
356 Tolnai, Tibor247551 24.52
357 Pekarek, Ales247553 27.29
358 Veinger, Itzhak247469 50.74
359 Kouatly, Bachar247450 31.08
360 Rukavina, Josip247461 46.34
361 Piskov, Yury247459 27.47
362 Meduna, Eduard247451 38.55
363 Kogan, Boris247363
364 Belov, Igor247370
365 Lombardy, William J247268 51.32
366 Zilberstein, Valery I247266 45.96
367 Řgaard, Leif247271 37.24
368 Kozlov, V.247159
369 Ekstroem, Roland247156 32.86
370 Martin del Campo, Roberto247156
371 Varavin, Viktor247165 21.86
372 Braga, Fernando247156 30.73
373 Plachetka, Jan247050 44.12
374 Raicevic, Momcilo247063
375 Hecht, Hans-Joachim247061 50.17
376 Kallai, Gabor246961 30.11
377 Fernandez Garcia, Jose Luis246960 34.91
378 Svensson, Bengt246976 28.73
379 Lutz, Christopher246859 18.10
380 Reefschlaeger, Helmut246859 44.97
381 Pytel, Krzysztof246874 43.88
382 Sellos, Didier246871 32.11
383 Tisdall, Jonathan D246752 30.60
384 Valkesalmi, Kimmo246754 27.91
385 Lechtynsky, Jiri246653 41.35
386 Levitt, Jonathan246650 25.83
387 Schmidt, Wlodzimierz246650 45.97
388 Li Zunian246672 31.23
389 Shamkovich, Leonid A246660 65.83
390 Ermenkov, Evgenij246552 39.51
391 Hoi, Carsten246550 32.21
392 Khasin, Alexander246459 37.92
393 Malisauskas, Vidmantas246459 25.66
394 Gurgenidze, Bukhuti I246462 55.38
395 Shabalov, Alexander246453 21.55
396 Arbakov, Valentin246465 37.18
397 Vukic, Milan246463 45.62
398 Reeh, Oliver246454 25.20
399 Gostisa, Leon246463 27.99
400 Tempone, Marcelo246360 26.57
401 Zaitsev, Igor A246370 50.84
402 Klundt, Klaus246258 47.27
403 Kirov Ivanov, Nino246256 43.56
404 Szekely, Peter246257 34.15
405 Ambroz, Jan246270 34.79
406 Anic, Darko246264 31.92
407 Sherzer, Alex246259 18.16
408 Petkevich, Jusefs246263 48.28
409 Filipenko, Alexander V246176 40.07
410 Wirthensohn, Heinz246156 37.91
411 Knezevic, Milorad246155 52.42
412 Staniszewski, Piotr246154 22.57
413 Norwood, David246154 20.49
414 Reyes, Juan246069 25.92
415 Hertneck, Gerald246052 25.54
416 Gurevich, Dmitry246051 32.55
417 Stanojevic, Branko245972 46.24
418 Saltaev, Mihail245962 26.37
419 Negulescu, Adrian245959 27.81
420 Szabó, László245973 72.03
421 Brunner, Lucas245952 21.84
422 Mascarinas, Rico245960 36.08
423 Djuric, Stefan245851 33.68
424 Lagunow, Alexander245873 21.71
425 Kožul, Zdenko245853 22.86
426 Zysk, Robert245756 22.91
427 Jukic, Mirko245759 26.45
428 Ree, Hans245758 44.54
429 Karolyi, Tibor Jr245751 27.38
430 Cabrilo, Goran245752 30.75
431 Mednis, Edmar J245655 52.02
432 Sigurjónsson, Gudmundur245668 41.52
433 Vokác, Marek245652 30.32
434 Renman, Nils Gustaf245658
435 Piasetski, Leon David245667
436 Kolev, Atanas245562 21.71
437 Nikolic, Zivoslav245553 35.30
438 Semeniuk, Alexander A245565 36.56
439 Marangunic, Srdjan245564 45.42
440 Solozhenkin, Evgeniy245564 22.67
441 Douven, Rudy C245453 27.90
442 Schmittdiel, Eckhard245451 28.88
443 Vilela, Jose Luis245455 36.03
444 Popov, Luben245362 53.18
445 Pribyl, Josef245353 41.47
446 Djukic, Zeljko245368 29.80
447 Semkov, Semko245253 29.09
448 Verduga, Denis Homero245257
449 Bilek, István245260 56.64
450 Strikovic, Aleksa245254 27.88
451 Dueball, Juergen245267 44.01
452 Komarov, Dimitri245261 20.33
453 Radulov, Ivan245157 50.23
454 Petran, Pal245154 42.54
455 Nun, Jiri245053 31.68
456 Rechlis, Gad245056 22.15
457 Ardiansyah, Haji245065 37.32
458 Levin, Felix245060 30.40
459 Trapl, Jindrich245068 47.02
460 Djurhuus, Rune245056 19.18
461 Rachels, Stuart245062 19.51
462 Legky, Nikolay A245067 33.96
463 Prandstetter, Eduard244953 40.29
464 Nemet, Ivan244858 45.96
465 Rakic, Tomislav244865 54.39
466 Lalev, Dimitar244870 29.21
467 Graf, Juergen244860 26.00
468 Arkell, Keith C244754 28.23
469 Gruenenwald, Joerg244761 23.82
470 Kuijf, Marinus244753 29.13
471 Ilincic, Zlatko244656 20.89
472 Lanc, Alois244652 41.12
473 Orso, Miklos244674 32.81
474 Armas, Julius244658 33.92
475 Cramling, Pia244654 25.93
476 Meister, Yakov244662 33.55
477 Magomedov, Magaram244676 22.86
478 Brynell, Stellan244557 26.51
479 Conquest, Stuart244550 22.08
480 Vallifuoco, Giacomo244570 31.91
481 Ochoa de Echaguen, F Javier244559 34.57
482 Brestian, Egon244557 24.68
483 Machulsky, Anatoly D244564 32.52
484 Ronin, V.244576
485 Malevinsky, Alexander A244468 39.10
486 Nei, Iivo244463 57.42
487 Thorsteins, Karl244452 24.47
488 Garcia, Gildardo244456 35.06
489 Bergstrom, Christer244459 30.51
490 Schneider, Lars Ake244456
491 Dizdarevic, Emir244454 30.99
492 Zelcic, Robert244373 23.53
493 Lendwai, Reinhard244366 22.47
494 Atalik, Suat244369 24.47
495 Ciric, Dragoljub M244373 53.38
496 Neckar, Lubomir244371 38.66
497 Filipovic, Branko244257 31.48
498 Zlotnik, Boris A244267 42.46
499 Grivas, Efstratios244263 23.00
500 Blatny, Pavel244251 20.77

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