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Top 10 active players as of April 30, 1989


Top 500 active players as of April 30, 1989

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28304859.9% #226.05
2 Karpov, Anatoly E28074734.2% #237.93
3 Short, Nigel D2707470.9% #2223.91
4 Salov, Valery B2704501.0% #2524.92
5 Timman, Jan H2701470.6% #2537.38
6 Korchnoi, Viktor L2693470.4% #3058.10
7 Beliavsky, Alexander G2686480.3% #3435.37
8 Ivanchuk, Vassily2679490.3% #4020.12
9 Gurevich, Mikhail N2674480.2% #4330.19
10 Tal, Mikhail2671480.1% #4552.47
11 Hübner, Robert2670480.1% #4640.48
12 Andersson, Ulf2669480.1% #4637.84
13 Speelman, Jonathan S2668480.1% #4732.58
14 Ehlvest, Jaan2667480.1% #4826.54
15 Portisch, Lajos2665480.1% #5052.07
16 Ljubojevic, Ljubomir2662480.1% #5238.49
17 Yudasin, Leonid G2662510.1% #5329.73
18 Jussupow, Artur M2658480.1% #5629.21
19 Polugaevsky, Lev A2655500.1% #6054.44
20 Lputian, Smbat G2653490.1% #6131.21
21 Ribli, Zoltán265248 #6237.65
22 Dreev, Alexey265150 #6320.28
23 Gelfand, Boris2650510.1% #6420.85
24 Nikolic, Predrag264848 #6528.64
25 Tukmakov, Vladimir B2647490.1% #6743.12
26 Dolmatov, Sergey V2646490.1% #6830.19
27 Gulko, Boris F264548 #6842.22
28 Khalifman, Alexander264149 #7223.28
29 Dvoiris, Semen I2641550.1% #7830.49
30 Vaganian, Rafael A264048 #7437.54
31 Dautov, Rustem2638520.1% #7923.42
32 Gavrikov, Victor N263549 #8031.75
33 Chernin, Alexander M263349 #8129.15
34 Dokhoian, Yury263250 #8324.51
35 Azmaiparashvili, Zurab A263053 #8829.12
36 Spassky, Boris V263049 #8552.25
37 Eingorn, Viacheslav S262949 #8732.43
38 Agdestein, Simen262851 #8821.95
39 Vladimirov, Evgeny Y262554 #9332.28
40 Psakhis, Lev B262548 #9030.42
41 Sokolov, Andrey Y262449 #9026.11
42 Nunn, John D M262449 #9034.01
43 Kovalev, Andrei262357 #9827.48
44 Malaniuk, Vladimir P262249 #9431.78
45 Sveshnikov, Evgeny E262053 #10039.22
46 Georgiev, Kiril261849 #9823.42
47 Christiansen, Larry M261749 #9932.84
48 Smirin, Ilia261752 #10121.28
49 Vyzmanavin, Alexey261653 #10329.33
50 Smyslov, Vassily V261651 #10168.10
51 Yurtaev, Leonid261653 #10329.99
52 Sax, Gyula261449 #10237.87
53 Romanishin, Oleg M261348 #10237.30
54 Balashov, Yury S261349 #10440.13
55 Bareev, Evgeny261151 #10722.44
56 Anand, Viswanathan261050 #10819.39
57 Pigusov, Evgeny260951 #10928.08
58 Torre, Eugenio260951 #10937.49
59 Dorfman, Iosif D260851 #11136.99
60 Seirawan, Yasser260849 #10929.10
61 Hort, Vlastimil260649 #11145.30
62 Hjartarson, Jóhann260548 #11126.23
63 Ivanov, Alexander V260255 #12132.99
64 Timoshchenko, Gennady260151 #11840.01
65 Oll, Lembit259951 #12023.02
66 Smagin, Sergey259650 #12230.64
67 Aseev, Konstantin N259653 #12628.53
68 Razuvaev, Yury S259450 #12543.55
69 Kamsky, Gata259455 #12914.91
70 Naumkin, Igor259455 #12923.72
71 Kharitonov, Andrey Y259149 #12730.07
72 Kuzmin, Gennady P258956 #13643.28
73 Nogueiras, Jesus258948 #13029.79
74 Yermolinsky, Alex V258852 #13331.05
75 Tseshkovsky, Vitaly V258850 #13344.60
76 Panchenko, Alexander N258756 #13735.57
77 Shirov, Alexei258655 #13816.82
78 Lerner, Konstantin Z258650 #13439.17
79 Ubilava, Elizbar E258654 #13738.68
80 Goldin, Alexander258551 #13524.18
81 Kveinys, Aloyzas258460 #14326.81
82 Kupreichik, Viktor D258451 #13739.82
83 Huzman, Alexander258453 #13827.05
84 Rozentalis, Eduardas258451 #13725.92
85 Miles, Anthony J258448 #13534.02
86 Kruppa, Yuri258358 #14224.86
87 Vaisser, Anatoli258351 #13840.15
88 Fedorowicz, John P258249 #13830.59
89 Arkhipov, Sergey258258 #14434.85
90 Gorelov, Sergey G258163 #14731.70
91 deFirmian, Nicholas E258150 #14031.76
92 Dzindzichashvili, Roman Y258054 #14244.98
93 Podgaets, Mikhail Y258072 #15541.77
94 Krasenkow, Michal258056 #14425.46
95 Rashkovsky, Nukhim N258052 #14243.03
96 Murey, Yakov257952 #14247.74
97 Glek, Igor V257754 #14627.48
98 Epishin, Vladimir257754 #14623.80
99 Lobron, Eric257649 #14428.97
100 Giorgadze, Giorgi257554 #14824.55
101 Geller, Efim P257551 64.16
102 Shabanov, Yury F257568 51.47
103 van der Wiel, John T H257448 29.72
104 Adorján, András257451 39.08
105 Larsen, Bent257350 54.15
106 Makarichev, Sergey Y257358 35.45
107 Sosonko, Gennadi257352 45.94
108 Chandler, Murray G257148 29.07
109 Pintér, József257151 35.47
110 Sorokin, Maxim257061 21.27
111 Smejkal, Jan256951 43.11
112 Pétursson, Margeir256948 29.21
113 Neverov, Valery256854 24.86
114 Spraggett, Kevin B256854 34.47
115 Kholmov, Ratmir D256652 63.96
116 Chekhov, Valery A256550 33.43
117 Hansen, Curt256550 24.62
118 Tseitlin, Mark D256574 45.60
119 Olafsson, Helgi256450 32.71
120 Kavalek, Lubomir256258 45.72
121 Benjamin, Joel L256249 25.14
122 Darga, Klaus V256268 55.18
123 Didishko, Vereslav256274 40.05
124 Orlov, Georgi256162
125 Kudrin, Sergey256050 29.65
126 Csom, István255951 48.91
127 Vasiukov, Evgeny A255954 56.15
128 Browne, Walter S255951 40.30
129 Duer, Arne255869 29.80
130 Ftácnik, Lubomír255850 31.50
131 Karlsson, Lars255751 33.80
132 Ulibin, Mikhail255753 17.91
133 Ionov, Sergey255759 27.31
134 Kuzmin, Alexey255757 26.14
135 Mikhalchishin, Adrian B255650 34.45
136 Bikhovsky, Avigdor I255567 34.15
137 Zaichik, Gennady L255551 32.22
138 Bönsch, Uwe255549 30.54
139 Hellers, Ferdinand255551 20.26
140 Mestel, A Jonathan255456 32.13
141 Bagirov, Vladimir K255354 52.71
142 Greenfeld, Alon255252 25.04
143 Taimanov, Mark E255168 63.23
144 Hulak, Krunoslav255051 37.92
145 Janjgava, Lasha254952 18.98
146 Novikov, Igor A254551 26.93
147 Shneider, Aleksandr254559 26.93
148 Najdorf, Miguel254563 79.04
149 Kochiev, Alexander254554 33.10
150 Gheorghiu, Florin254551 45.07
151 Kindermann, Stefan254448 29.34
152 Soppe, Guillermo254462 28.62
153 Dlugy, Maxim254450 23.25
154 Popovic, Petar254450 30.21
155 Ruban, Vadim254354 24.88
156 Todorcevic, Miodrag254251 48.47
157 Quinteros, Miguel A254260 41.34
158 Barua, Dibyendu254255 22.51
159 Arnason, Jon L254250 28.46
160 Timoshenko, Georgy254161 22.91
161 Savchenko, Stanislav254155 22.28
162 Kengis, Edvins254056 30.05
163 Zilberman, Nathan R254072 48.98
164 Karpman, Vadim254059 23.96
165 Adams, Michael253952 17.45
166 Rogers, Ian253949 28.85
167 Knaak, Rainer F253949 36.12
168 Ivanovic, Božidar253951 42.68
169 Sokolov, Ivan253950 20.88
170 Kurajica, Bojan253866 41.46
171 Moskalenko, Viktor253654 28.40
172 Zlotnik, Boris A253662 42.54
173 Henley, Ron W253570 32.40
174 Schussler, Harry253453 31.85
175 Rodriguez, Amador253349 32.64
176 Kaidanov, Gregory S253351 29.55
177 Lalic, Bogdan253352 25.14
178 Cebalo, Mišo253350 44.23
179 Lanka, Zigurds253357 28.94
180 Kiselev, Sergey253357 27.63
181 Mirkovic, Slobodan253269 30.76
182 Yakovich, Yuri253257 26.42
183 Cvitan, Ognjen253251 27.55
184 Antunes, Antonio253257 27.23
185 Suba, Mihai253251 41.91
186 Reshevsky, Samuel H253266 77.43
187 Zapata, Alonso253250 30.69
188 Serper, Grigory253153 19.63
189 Gaprindashvili, Nona253060 47.98
190 Pfleger, Helmut253057 45.73
191 Chiburdanidze, Maia G253051 28.29
192 Mnatsakanian, Eduard A253069 50.40
193 Morovic Fernández, Iván E252954 26.10
194 Kalinitschew, Sergey252960 33.24
195 Adianto, Utut252960 24.12
196 Byrne, Robert E252862 61.03
197 Gipslis, Aivars252859 52.23
198 Uhlmann, Wolfgang252851 54.09
199 Van der Sterren, Paul252749 33.12
200 Cámpora, Daniel H252750 31.83
201 Gligoric, Svetozar252756 66.24
202 Barbero, Gerardo F252652 27.69
203 Bjelajac, Milan252668 41.13
204 Panno, Oscar R252653 54.12
205 Milos, Gilberto252653 25.50
206 Ivanov, Igor V252655 42.31
207 Wilder, Michael252651 26.62
208 Ninov, Kiril252553 20.56
209 Magerramov, Elmar S252554 31.05
210 Mokrý, Karel252451 30.23
211 Velimirovic, Dragoljub252451 46.96
212 Donchev, Dimitar I252354 30.78
213 Liberzon, Vladimir M252370 52.10
214 Franco Ocampos, Zenon252358 32.96
215 Gruenberg, Hans Ulrich252254 33.31
216 Watson, William N252248 27.03
217 Faragó, Iván252250 43.08
218 Zagrebelny, Sergey252259
219 Anastasian, Ashot252256 24.79
220 Hodgson, Julian M252149 25.76
221 Kovacevic, Vladimir252151 47.09
222 Petrosian, Arshak B252052 35.37
223 Nikolac, Juraj252058 57.02
224 Georgadze, Tamaz V251962 41.47
225 Vitolinš, Alvis251967 42.87
226 Basin, Leonid251854 31.44
227 Graf, Alexander251856 26.68
228 Xu Jun251854 26.62
229 Baburin, Alexander251862 22.20
230 Marjanovic, Slavoljub251750 34.32
231 Savon, Vladimir A251756 48.59
232 Gufeld, Eduard E251755 53.11
233 Damljanovic, Branko251750 27.87
234 Sunye Neto, Jaime251658 31.99
235 Groszpeter, Attila251650 28.89
236 Govedarica, Radovan251573 41.21
237 Akopian, Vladimir251553 17.40
238 Lukin, Andrei M251558 40.67
239 Bischoff, Klaus251550 27.89
240 Moroz, Alexander251462 28.28
241 London, Dimitri251464 26.44
242 Wedberg, Tom251450 35.43
243 Rohde, Michael A251352 29.68
244 Gruenfeld, Yehuda251254 33.17
245 Horvath, Jozsef251251 24.71
246 Foisor, Ovidiu251253 30.07
247 Petrienko, Vladimir251268 34.14
248 Barlov, Dragan251150 32.25
249 Inkiov, Ventzislav251151 32.94
250 Dizdar, Goran251151 30.40
251 Garcia Palermo, Carlos251152 35.41
252 Veingold, Aleksander251167 35.55
253 Padevsky, Nikola B251169 55.91
254 Yuferov, Sergey N250968 43.41
255 King, Daniel J250950 25.67
256 Polgar, Zsuzsa250950 20.03
257 Stoica, Valentin250964 39.21
258 Unzicker, Wolfgang250657 63.84
259 Zhuravliov, Valerij250565 50.39
260 Bronstein, David I250556 65.20
261 Sherbakov, Vitaly S250569 33.86
262 Simic, Radoslav250556 40.89
263 Efimov, Igor250562 28.62
264 Sahovic, Dragutin250461 48.73
265 Wahls, Matthias250351 21.26
266 Frias, Victor J250356 33.22
267 Gofshtein, Leonid D250370 36.03
268 McKay, Roderick M250368 37.22
269 Mohr, Stefan250251 21.52
270 Hazai, Laszlo250252 35.88
271 Ostermeyer, Peter250260 45.55
272 Ivkov, Borislav250154 55.47
273 Mortensen, Erling250153 34.07
274 Kantsler, Boris250163 27.04
275 Piket, Jeroen250049 20.26
276 Renet, Olivier250050 24.36
277 Illescas Cordoba, Miguel250052 23.41
278 Espig, Lutz250054 40.32
279 Ye Jiangchuan249960 28.44
280 Palatnik, Semen A249955 39.09
281 Ornstein, Axel249957 37.02
282 Flear, Glenn C249950 30.22
283 Reyes, Juan249861 26.01
284 Tischbierek, Raj249852 26.60
285 Stohl, Igor249751 24.59
286 Tseitlin, Mikhail S249757 41.87
287 Plaskett, Jim249653 29.12
288 Drasko, Milan249650 26.40
289 Guseinov, Aidyn249657 37.33
290 Jansa, Vlastimil249651 46.43
291 Rodriguez Vargas, Orestes249657 45.82
292 Lein, Anatoly249555 58.09
293 Wolff, Patrick G249552 21.21
294 García Gonzáles, Guillermo249551 35.39
295 Seret, Jean Luc249462
296 Alburt, Lev O249452 43.69
297 Hebden, Mark249451 31.21
298 Komarov, Dimitri249458 20.41
299 Vera, Reynaldo249454 28.31
300 Sher, Miron N249465 36.84
301 Hickl, Joerg249349 24.04
302 Loginov, Valery A249257 33.38
303 Rivas Pastor, Manuel249254 28.80
304 Lukacs, Peter249250 38.81
305 Vogt, Lothar H249150 37.29
306 Andrianov, Nikolai249168 27.36
307 Lukov, Valentin249155 33.39
308 Motwani, Paul249056 26.88
309 Mochalov, Evgeny V248972 37.50
310 Womacka, Mathias248866 22.84
311 Ghinda, Mihail Viorel248857 39.76
312 Kosten, Anthony C248849 30.77
313 Palac, Mladen248764 18.20
314 Popchev, Milko248752 24.47
315 Kotronias, Vasilios248751 24.68
316 Sideif Sade, Fikret I248761 37.33
317 Ye Rongguang248664 25.57
318 Gomez Baillo, Jorge H248657 30.03
319 Martinovic, Slobodan248657 43.76
320 Klaric, Zlatko248559 32.52
321 Velikov, Petar248553 38.08
322 Tisdall, Jonathan D248551 30.68
323 Marin, Mihail248454 24.03
324 Kožul, Zdenko248451 22.94
325 Kraidman, Yair248465 56.50
326 Murshed, Niaz248456 22.96
327 Yrjola, Jouni248452 29.52
328 Thorhallsson, Throstur248357 20.11
329 Filipenko, Alexander V248375 40.15
330 Khenkin, Igor248364 21.11
331 Akhmilovskaya, Elena248363
332 Kishnev, Sergey248163 32.50
333 Gutman, Lev248151 43.59
334 Lin Ta248163 26.25
335 Tringov, Georgy P248158 52.15
336 Skembris, Spyridon248155 31.19
337 Fernandez Garcia, Jose Luis248160 34.98
338 Rogulj, Branko248064 37.75
339 Matulovic, Milan248060 53.89
340 Granda Zuńiga, Julio E248051 22.18
341 Belov, Igor247971
342 Lau, Ralf247949 29.53
343 Barbulescu, Dan247859 24.85
344 Abramovic, Boško247850 38.21
345 Brooks, Michael A247860 28.04
346 Ionescu, Constantin247754 30.63
347 Sznapik, Aleksander247651 38.22
348 Georgiev, Krum247553 30.93
349 Wojtkiewicz, Aleksander247553 26.29
350 Rubinetti, Jorge A247557 44.08
351 Pytel, Krzysztof247574 43.95
352 Rukavina, Josip247562 46.42
353 Mascarinas, Rico247557 36.16
354 Cifuentes Parada, Roberto247454 31.36
355 Reefschlaeger, Helmut247459 45.06
356 Haba, Petr247453 24.32
357 Meduna, Eduard247451 38.64
358 Raicevic, Momcilo247463
359 Ioseliani, Nana247355 27.22
360 Tolnai, Tibor247351 24.60
361 Kouatly, Bachar247350 31.16
362 Zilberstein, Valery I247366 46.05
363 Piskov, Yury247359 27.55
364 Rajkovic, Dusan247354 46.87
365 Levitt, Jonathan247250 25.91
366 Ilincic, Zlatko247254 20.97
367 Hansen, Lars Bo247251 20.60
368 Lombardy, William J247271 51.40
369 Klinger, Josef247250 21.90
370 Kozlov, V.247159
371 Svensson, Bengt247176 28.81
372 Kallai, Gabor247161 30.19
373 Gleizerov, Evgeny247165 26.11
374 Malisauskas, Vidmantas247057 25.74
375 Braga, Fernando247056 30.81
376 Pekarek, Ales247053 27.37
377 Hertneck, Gerald247053 25.62
378 Řgaard, Leif247071 37.32
379 Sellos, Didier247063 32.19
380 Varavin, Viktor247065 21.93
381 Nijboer, Friso246956 23.92
382 Kosic, Dragan246960 19.21
383 Plachetka, Jan246950 44.20
384 Zaitsev, Igor A246970 50.92
385 Lechtynsky, Jiri246853 41.43
386 Mainka, Romuald246854 25.95
387 Schmidt, Wlodzimierz246750 46.05
388 Li Zunian246672 31.31
389 Hoi, Carsten246650 32.29
390 Hecht, Hans-Joachim246665 50.25
391 Gurgenidze, Bukhuti I246662 55.46
392 Kogan, Boris246663
393 Shamkovich, Leonid A246561 65.91
394 Vukic, Milan246559 45.70
395 Gostisa, Leon246463 28.08
396 Arbakov, Valentin246465 37.26
397 Saltaev, Mihail246462 26.45
398 Shabalov, Alexander246453 21.63
399 Szekely, Peter246458 34.23
400 Davies, Nigel R246450 28.75
401 Stanojevic, Branko246372 46.32
402 Reeh, Oliver246254 25.28
403 Lutz, Christopher246259 18.18
404 Ambroz, Jan246270 34.87
405 Ermenkov, Evgenij246253 39.59
406 Szabó, László246173 72.11
407 Khasin, Alexander246159 38.00
408 Petkevich, Jusefs246163 48.36
409 Ernst, Thomas246149 28.70
410 Gurevich, Dmitry246152 32.64
411 Vallifuoco, Giacomo246168 31.98
412 Norwood, David246054 20.57
413 Djuric, Stefan246051 33.76
414 Lagunow, Alexander246073 21.79
415 Piasetski, Leon David246068
416 Ekstroem, Roland246056 32.93
417 Kirov Ivanov, Nino245956 43.64
418 Mednis, Edmar J245955 52.11
419 Negulescu, Adrian245959 27.89
420 Jukic, Mirko245959 26.53
421 Wirthensohn, Heinz245956 37.98
422 Veinger, Itzhak245867 50.82
423 Tempone, Marcelo245863 26.65
424 Renman, Nils Gustaf245858
425 Valkesalmi, Kimmo245754 27.99
426 Sigurjónsson, Gudmundur245769 41.60
427 Vilela, Jose Luis245755 36.11
428 Zysk, Robert245655 22.98
429 Knezevic, Milorad245656 52.50
430 Karolyi, Tibor Jr245651 27.46
431 Staniszewski, Piotr245654 22.65
432 Ree, Hans245658 44.62
433 Rachels, Stuart245663 19.59
434 Semeniuk, Alexander A245665 36.64
435 Vokác, Marek245552 30.40
436 Brunner, Lucas245552 21.91
437 Legky, Nikolay A245460 34.05
438 Avshalumov, Alex245458 25.16
439 Dizdarevic, Emir245453 31.08
440 Gruenenwald, Joerg245461 23.90
441 Cabrilo, Goran245352 30.83
442 Verduga, Denis Homero245357
443 Pribyl, Josef245353 41.55
444 Solozhenkin, Evgeniy245264 22.75
445 Popov, Luben245262 53.26
446 Neckar, Lubomir245271 38.74
447 Kolev, Atanas245262 21.79
448 Blatny, Pavel245151 20.86
449 Dueball, Juergen245066 44.09
450 Radulov, Ivan245057 50.31
451 Orso, Miklos245074 32.89
452 Djurhuus, Rune245056 19.26
453 Djukic, Zeljko245068 29.88
454 Rytshagov, Mikhail245062 21.47
455 Kuijf, Marinus244952 29.22
456 Prandstetter, Eduard244953 40.37
457 Okhotnik, Vladimir244956 39.17
458 Levin, Felix244960 30.48
459 Meister, Peter244958 22.85
460 Schmittdiel, Eckhard244951 28.96
461 Cramling, Pia244954 26.02
462 Dimitrov, Vladimir244859 21.05
463 Schneider, Lars Ake244856
464 Ciric, Dragoljub M244873 53.47
465 Petran, Pal244855 42.62
466 Hawelko, Marek244852 29.72
467 Ardiansyah, Haji244765 37.40
468 Sendera, Jaroslaw244773 24.01
469 Graf, Juergen244759 26.08
470 Ronin, V.244676
471 Semkov, Semko244653 29.17
472 Armas, Julius244658 34.01
473 Bilek, István244660 56.72
474 Filipovic, Branko244658 31.57
475 Brestian, Egon244658 24.76
476 Thorsteins, Karl244552 24.55
477 Zelcic, Robert244573 23.61
478 Klundt, Klaus244558 47.35
479 Nemet, Ivan244559 46.04
480 Douven, Rudy C244552 27.98
481 Marangunic, Srdjan244566 45.50
482 Bergstrom, Christer244559 30.59
483 Lalev, Dimitar244570 29.29
484 Meister, Yakov244562 33.64
485 Titov, German244563 26.01
486 Makarov, Marat244463 25.97
487 Cramling, Dan244466 30.23
488 Lima, Darcy244361 26.93
489 Kuczynski, Robert244351 23.04
490 Arkell, Keith C244354 28.31
491 Conquest, Stuart244350 22.16
492 Machulsky, Anatoly D244364 32.60
493 Nun, Jiri244353 31.76
494 Lanc, Alois244252 41.20
495 Atalik, Suat244269 24.55
496 Grivas, Efstratios244263 23.08
497 Kovacevic, Predrag244271 28.65
498 Brynell, Stellan244257 26.59
499 Karasev, Vladimir I244264 50.87
500 Horvath, Tamas244256 37.52

These ratings, calculated as of April 30, 1989, incorporate all games (against rated opponents) played in the time between May 1, 1988 and April 30, 1989, along with the ratings that were already calculated as of April 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 April 30, 1989. This represents the player's estimated strength on May 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 May 1, 1989. The +/- value represents the standard deviation of that estimate; the player's true strength on May 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 May 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 April 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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