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Top 10 active players as of August 31, 1987


Top 500 active players as of August 31, 1987

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28414982.1% #124.38
2 Karpov, Anatoly E27624810.6% #536.27
3 Timman, Jan H2709471.3% #1935.71
4 Beliavsky, Alexander G2694490.7% #2633.71
5 Jussupow, Artur M2688500.7% #3027.55
6 Tal, Mikhail2684480.4% #3150.81
7 Vaganian, Rafael A2679490.4% #3535.88
8 Korchnoi, Viktor L2678470.3% #3556.44
9 Gelfand, Boris2673570.7% #4319.19
10 Ljubojevic, Ljubomir2670480.2% #4136.83
11 Psakhis, Lev B2669480.2% #4128.76
12 Salov, Valery B2669500.2% #4323.26
13 Portisch, Lajos2666480.2% #4350.41
14 Short, Nigel D2664470.1% #4422.25
15 Ehlvest, Jaan2662510.2% #4824.88
16 Seirawan, Yasser2657490.1% #5127.44
17 Hübner, Robert2657490.1% #5138.82
18 Tukmakov, Vladimir B2656500.1% #5241.46
19 Polugaevsky, Lev A2652510.1% #5552.78
20 Khalifman, Alexander2651500.1% #5721.62
21 Sax, Gyula2651490.1% #5636.20
22 Nikolic, Predrag2649500.1% #5826.97
23 Ribli, Zoltán2648490.1% #5935.98
24 Andersson, Ulf264849 #5836.18
25 Gurevich, Mikhail N2647490.1% #5928.53
26 Sokolov, Andrey Y264649 #6024.45
27 Speelman, Jonathan S264049 #6630.91
28 Balashov, Yury S263851 #6938.47
29 Spassky, Boris V263649 #6950.59
30 Romanishin, Oleg M263648 #6935.64
31 Eingorn, Viacheslav S263649 #7030.77
32 Dolmatov, Sergey V263450 #7128.53
33 Gulko, Boris F263350 #7340.56
34 Chernin, Alexander M263049 #7527.48
35 Lputian, Smbat G262649 #7929.55
36 Gavrikov, Victor N262650 #8130.09
37 Nunn, John D M262549 #8032.35
38 Vyzmanavin, Alexey262252 #8527.66
39 Naumkin, Igor2622690.2% #9922.06
40 Miles, Anthony J262048 #8432.36
41 Agdestein, Simen261951 #8720.29
42 Vladimirov, Evgeny Y2618590.1% #9530.61
43 Rozentalis, Eduardas261657 #9524.26
44 Pintér, József261551 #9233.81
45 Malaniuk, Vladimir P261549 #9230.11
46 Smirin, Ilia2614610.1% #10019.61
47 Hort, Vlastimil261449 #9143.64
48 Smagin, Sergey260651 #10228.97
49 Dvoiris, Semen I260558 #10828.83
50 Chandler, Murray G260448 #10127.41
51 Lerner, Konstantin Z260250 #10537.51
52 Huzman, Alexander260154 #10825.39
53 Azmaiparashvili, Zurab A260052 #10927.46
54 Bareev, Evgeny260051 #10920.78
55 Dokhoian, Yury259954 #11122.85
56 Dorfman, Iosif D259957 #11435.33
57 Smyslov, Vassily V259950 #10966.44
58 Larsen, Bent259850 #10952.49
59 Georgiev, Kiril259851 #11021.76
60 Christiansen, Larry M259751 #11031.18
61 Kharitonov, Andrey Y259555 #11728.41
62 Yermolinsky, Alex V259455 #11729.39
63 Razuvaev, Yury S259350 #11541.89
64 Murey, Yakov259252 #11746.08
65 Sveshnikov, Evgeny E259250 #11737.55
66 Rashkovsky, Nukhim N259051 #12041.37
67 Yurtaev, Leonid258959 #12528.33
68 Dzindzichashvili, Roman Y258659 #12943.32
69 Kuzmin, Gennady P258556 #12841.62
70 Mikhalchishin, Adrian B258451 #12632.79
71 Ivanchuk, Vassily258254 #12918.45
72 Kupreichik, Viktor D258250 #12738.16
73 Nogueiras, Jesus258149 #12728.12
74 Ftácnik, Lubomír258149 #12729.84
75 Vasiukov, Evgeny A258159 #13554.49
76 Kruppa, Yuri258056 #13423.19
77 Marjanovic, Slavoljub257850 #13132.65
78 Geller, Efim P257851 #13162.50
79 Panno, Oscar R257865 #14152.46
80 Torre, Eugenio257850 #13135.82
81 Ubilava, Elizbar E257751 #13437.01
82 Kochiev, Alexander257656 #13731.43
83 Makarichev, Sergey Y257656 #13733.79
84 Hansen, Curt257650 #13422.95
85 Yudasin, Leonid G257550 #13428.06
86 Anand, Viswanathan257556 #13917.72
87 van der Wiel, John T H257448 #13328.06
88 Panchenko, Alexander N257455 #13933.90
89 Kavalek, Lubomir257352 #13744.06
90 Arkhipov, Sergey257154 #14133.19
91 Zaichik, Gennady L257152 #14030.55
92 Chiburdanidze, Maia G257053 #14126.62
93 Popovic, Petar256950 #14028.55
94 Pigusov, Evgeny256951 #14126.42
95 Dreev, Alexey256857 #14618.61
96 Podgaets, Mikhail Y256862 #14940.11
97 Graf, Alexander256859 #14725.02
98 Bönsch, Uwe256750 #14328.88
99 Hjartarson, Jóhann256549 #14324.56
100 Savon, Vladimir A256570 #15646.92
101 Novikov, Igor A256451 25.27
102 Adorján, András256449 37.42
103 Ivanov, Igor V256259 40.65
104 Serper, Grigory256257 17.96
105 Gorelov, Sergey G256258 30.04
106 Sosonko, Gennadi256150 44.29
107 Gligoric, Svetozar255955 64.58
108 Shneider, Aleksandr255958 25.28
109 Gheorghiu, Florin255950 43.40
110 Kengis, Edvins255853 28.39
111 Karlsson, Lars255851 32.14
112 Cámpora, Daniel H255851 30.17
113 Kantsler, Boris255757 25.37
114 Fedorowicz, John P255750 28.92
115 Goldin, Alexander255654 22.51
116 Benjamin, Joel L255550 23.47
117 Suba, Mihai255549 40.25
118 Uhlmann, Wolfgang255550 52.42
119 Glek, Igor V255459 25.82
120 Kaidanov, Gregory S255452 27.89
121 Kolarov, Atanas S255268 53.50
122 Tseshkovsky, Vitaly V255152 42.93
123 Epishin, Vladimir255058 22.14
124 Knaak, Rainer F255050 34.46
125 Cvitan, Ognjen255051 25.89
126 Timoshchenko, Gennady254954 38.34
127 Bagirov, Vladimir K254857 51.04
128 Olafsson, Helgi254750 31.04
129 Yakovich, Yuri254751 24.75
130 Liberzon, Vladimir M254672 50.44
131 Gufeld, Eduard E254660 51.45
132 Kholmov, Ratmir D254656 62.30
133 Vaisser, Anatoli254654 38.49
134 Garcia Palermo, Carlos254550 33.75
135 Barua, Dibyendu254459 20.84
136 Pétursson, Margeir254449 27.54
137 Kuzmin, Alexey254268 24.48
138 Korzubov, Peter254267 25.66
139 Quinteros, Miguel A254254 39.68
140 Matanovic, Aleksandar254175 57.27
141 Shabanov, Yury F254059 49.80
142 Alburt, Lev O254051 42.03
143 Ekstroem, Roland254064 31.28
144 Gruenfeld, Yehuda253851 31.51
145 Henley, Ron W253866 30.74
146 Taimanov, Mark E253865 61.57
147 Reshevsky, Samuel H253865 75.76
148 Vorotnikov, Vladislav V253774 40.04
149 Palatnik, Semen A253557 37.43
150 Sokolov, Ivan253555 19.22
151 Smejkal, Jan253450 41.44
152 Guseinov, Aidyn253462 35.66
153 Chekhov, Valery A253453 31.76
154 Spraggett, Kevin B253452 32.81
155 Inkiov, Ventzislav253351 31.28
156 Kurajica, Bojan253254 39.79
157 Neverov, Valery253254 23.19
158 Groszpeter, Attila253254 27.23
159 Dueball, Juergen253174 42.42
160 Kudrin, Sergey253050 27.98
161 Kindermann, Stefan253049 27.68
162 Browne, Walter S253052 38.64
163 Cifuentes Parada, Roberto253060 29.69
164 Dlugy, Maxim252950 21.59
165 Lobron, Eric252849 27.32
166 Adianto, Utut252860 22.46
167 Gaprindashvili, Nona252661 46.33
168 Petrosian, Arshak B252654 33.71
169 Byrne, Robert E252559 59.36
170 Rogers, Ian252450 27.19
171 Morovic Fernández, Iván E252456 24.44
172 Velimirovic, Dragoljub252350 45.30
173 Lau, Ralf252350 27.87
174 Oll, Lembit252252 21.36
175 Ivanov, Alexander V252261 31.33
176 Csom, István252251 47.25
177 Magerramov, Elmar S252162 29.39
178 Greenfeld, Alon252152 23.37
179 Velikov, Petar252054 36.42
180 Didishko, Vereslav251966 38.39
181 García Gonzáles, Guillermo251950 33.73
182 Barlov, Dragan251951 30.59
183 Nemet, Ivan251873 44.38
184 Mestel, A Jonathan251852 30.47
185 Ghinda, Mihail Viorel251755 38.10
186 Kovacevic, Vladimir251756 45.43
187 Arnason, Jon L251750 26.80
188 Sturua, Zurab251767 28.23
189 Aseev, Konstantin N251657 26.86
190 Mokrý, Karel251650 28.57
191 Grigorian, Karen A251567 39.98
192 Wedberg, Tom251555 33.76
193 Watson, William N251551 25.37
194 Barbero, Gerardo F251458 26.03
195 Nikolac, Juraj251365 55.36
196 Hulak, Krunoslav251350 36.27
197 Lein, Anatoly251354 56.43
198 Sunye Neto, Jaime251252 30.33
199 London, Dimitri251263 24.78
200 Vitolinš, Alvis251165 41.21
201 Meduna, Eduard251150 36.97
202 Antunes, Antonio251167 25.57
203 Lukacs, Peter251150 37.14
204 Loginov, Valery A250958 31.72
205 Rodriguez, Amador250950 30.97
206 Veingold, Aleksander250975 33.89
207 Gomez Baillo, Jorge H250868 28.37
208 Dautov, Rustem250862 21.76
209 Matulovic, Milan250760 52.22
210 Ostermeyer, Peter250659 43.89
211 Ivanovic, Božidar250654 41.02
212 Ivkov, Borislav250554 53.80
213 Hellers, Ferdinand250554 18.59
214 Zapata, Alonso250450 29.03
215 Joksic, Sinisa250471 46.89
216 Georgadze, Tamaz V250455 39.81
217 Unzicker, Wolfgang250357 62.18
218 Hazai, Laszlo250251 34.21
219 Kalinitschew, Sergey250262 31.58
220 Tringov, Georgy P250059 50.48
221 Basin, Leonid250065 29.77
222 Klovans, Janis249961 52.39
223 Georgiev, Krum249852 29.27
224 Lalic, Bogdan249859 23.48
225 Birnboim, Nathan249854 36.76
226 Cebalo, Mišo249751 42.57
227 Illescas Cordoba, Miguel249654 21.74
228 Plaskett, Jim249651 27.45
229 Govedarica, Radovan249661 39.55
230 Ernst, Thomas249552 27.04
231 Lanka, Zigurds249561 27.28
232 Stohl, Igor249552 22.92
233 Donchev, Dimitar I249555 29.11
234 Bischoff, Klaus249552 26.23
235 Vogt, Lothar H249553 35.62
236 Hodgson, Julian M249550 24.10
237 Schussler, Harry249454 30.19
238 Todorcevic, Miodrag249354 46.81
239 Vukic, Milan249365 44.03
240 Abramovic, Boško249353 36.55
241 Van der Sterren, Paul249250 31.46
242 Fokin, Sergey249270 31.88
243 Pytel, Krzysztof249166 42.29
244 Soppe, Guillermo249069 26.95
245 Faragó, Iván249048 41.41
246 Wilder, Michael249054 24.95
247 Xu Jun248952 24.95
248 Shamkovich, Leonid A248959 64.25
249 Foisor, Ovidiu248852 28.40
250 Gurevich, Dmitry248751 30.97
251 Hebden, Mark248655 29.54
252 Legky, Nikolay A248668 32.39
253 Ermenkov, Evgenij248454 37.92
254 Simic, Radoslav248464 39.23
255 Reyes, Juan248465 24.35
256 Staniszewski, Piotr248454 20.98
257 Rukavina, Josip248457 44.76
258 Seret, Jean Luc248361
259 Dizdar, Goran248355 28.74
260 Bukal, Vladimir Sr248261 47.83
261 Gutman, Lev248250 41.92
262 Vera, Reynaldo248253 26.65
263 Mnatsakanian, Eduard A248164 48.73
264 Raicevic, Momcilo248163
265 deFirmian, Nicholas E248051 30.10
266 Kogan, Boris248057
267 Stoica, Valentin247960 37.54
268 Tischbierek, Raj247951 24.93
269 Drasko, Milan247953 24.73
270 Winants, Luc247853 24.66
271 Wirthensohn, Heinz247860 36.32
272 Yrjola, Jouni247851 27.85
273 Filipenko, Alexander V247875 38.49
274 Ionescu, Constantin247753 28.96
275 Pfleger, Helmut247760 44.07
276 Klundt, Klaus247771 45.68
277 Klaric, Zlatko247665 30.85
278 Petrushin, Alexander I247671 40.47
279 Schneider, Lars Ake247656
280 Cramling, Dan247664 28.57
281 Nikolic, Zivoslav247556 33.72
282 Moskalenko, Viktor247566 26.74
283 Jansa, Vlastimil247550 44.76
284 Popchev, Milko247454 22.80
285 Rivas Pastor, Manuel247457 27.13
286 Portisch, Ferenc247363 48.39
287 Knezevic, Milorad247251 50.83
288 Plachetka, Jan247251 42.54
289 Podzielny, Karl Heinz247276 32.97
290 Wolf, Volker247164 29.98
291 Ree, Hans247154 42.95
292 Kosten, Anthony C247158 29.10
293 Piket, Jeroen247157 18.59
294 Gurgenidze, Bukhuti I247155 53.80
295 Hecht, Hans-Joachim247163 48.59
296 Andres Mendez, Miguel247063
297 Espig, Lutz247055 38.65
298 Szekely, Peter247056 32.56
299 Ostojic, Predrag246970 49.53
300 Mednis, Edmar J246961 50.44
301 Vaulin, Alexander246969 30.45
302 Szabó, László246970 70.45
303 Hjorth, Greg246970 24.13
304 Nun, Josef246968 54.11
305 Řgaard, Leif246958 35.65
306 Hawelko, Marek246851 28.06
307 Belov, Igor246863
308 Eslon, Jaan246869 35.49
309 Lechtynsky, Jiri246753 39.77
310 Sahovic, Dragutin246762 47.06
311 Sideif Sade, Fikret I246758 35.66
312 Mortensen, Erling246652 32.40
313 Lombardy, William J246660 49.74
314 Jelen, Iztok246672 40.62
315 Yap, Andronico246658
316 Flear, Glenn C246650 28.55
317 Rajkovic, Dusan246558 45.21
318 Hickl, Joerg246552 22.37
319 Piesina, Gintautas246568 35.40
320 Frias, Victor J246469 31.56
321 Imanaliev, Taalaibek246471
322 Marangunic, Srdjan246365 43.83
323 Marin, Mihail246356 22.36
324 Rakic, Tomislav246265 52.80
325 Veinger, Itzhak246157 49.15
326 Tatai, Stefano246056 49.44
327 Fernandez Garcia, Jose Luis246056 33.33
328 Li Zunian246059 29.65
329 Zaitsev, Igor A246074 49.26
330 Ambroz, Jan245958 33.20
331 Renet, Olivier245951 22.69
332 Ziatdinov, Raset245970 28.68
333 Tempone, Marcelo245873 24.98
334 Blatny, Pavel245855 19.19
335 Barbulescu, Dan245856 23.19
336 Murshed, Niaz245864 21.30
337 Lanc, Alois245851 39.54
338 Khasin, Alexander245861 36.34
339 Kremenetsky, Anatoly M245772 48.63
340 Valkesalmi, Kimmo245755 26.33
341 Gauglitz, Gernot245757 25.18
342 Thorsteins, Karl245755 22.88
343 Krasenkow, Michal245665 23.80
344 Janovsky, Sergey245576 27.54
345 Hermann, Manfred245466 44.99
346 Santo Roman, Marc245470 26.96
347 Pekarek, Ales245352 25.71
348 Karpman, Vadim245369 22.30
349 Sharif, Mershad245257 35.14
350 Lukin, Andrei M245266 39.01
351 Womacka, Mathias245274 21.18
352 Helmers, Knut J245266 30.57
353 Filipovic, Branko245160 29.90
354 Horvath, Jozsef245152 23.05
355 Pedersen, Erik245062 28.97
356 Tseitlin, Mikhail S245065 40.21
357 Akesson, Ralf245060 26.56
358 Popov, Luben245068 51.59
359 Kirov Ivanov, Nino245054 41.97
360 Schmidt, Wlodzimierz245049 44.39
361 Renman, Nils Gustaf245061
362 Keitlinghaus, Ludger244961 22.10
363 Rechlis, Gad244856 20.57
364 Potts, Alan244768
365 Semkov, Semko244758 27.51
366 Tisdall, Jonathan D244755 29.01
367 Ardiansyah, Haji244660 35.74
368 Ryskin, Alexander244672 24.64
369 King, Daniel J244652 24.01
370 Vokác, Marek244657 28.73
371 Sigurjónsson, Gudmundur244656 39.93
372 Polgar, Zsuzsa244550 18.37
373 Pribyl, Josef244556 39.89
374 Talavera, JC.244569
375 Reeh, Oliver244560 23.62
376 Efimov, Igor244571 26.95
377 Verduga, Denis Homero244560
378 Ornstein, Axel244557 35.35
379 Kolev, Atanas244562 20.13
380 Giorgadze, Giorgi244566 22.89
381 Shtyrenkov, Veniamen244570 29.36
382 Wockenfuss, Klaus244559 36.01
383 Kurtenkov, Atanas244463 24.08
384 Ricardi, Pablo244459 25.52
385 Radulov, Ivan244455 48.65
386 Granda Zuńiga, Julio E244354 20.52
387 Kraidman, Yair244264 54.83
388 Rodriguez, Ruben244169 40.73
389 Spassov, Liuben244054 44.44
390 Lazic, Miroljub244071 21.18
391 Braga, Fernando244061 29.14
392 Lalev, Dimitar244070 27.62
393 Mencinger, Vojko243967 29.40
394 Rigo, Janos243862 38.84
395 Rachels, Stuart243862 17.92
396 Rohde, Michael A243854 28.01
397 Akhmilovskaya, Elena243761
398 Kuligowski, Adam243756 31.69
399 Sorokin, Maxim243770 19.61
400 Nun, Jiri243659 30.09
401 Gruenberg, Hans Ulrich243657 31.64
402 Meyer, E.243676
403 Wittmann, Walter243656 39.47
404 Ye Jiangchuan243663 26.78
405 Hertneck, Gerald243654 23.95
406 Heinbuch, Detlef243557 26.64
407 Bielczyk, Jacek243557 34.52
408 Rodriguez Vargas, Orestes243561 44.16
409 Handoko, Edhi243359 27.01
410 Wiedenkeller, Michael243354 24.64
411 Klinger, Josef243352 20.23
412 Spiridonov, Nikola243255 49.51
413 Filipowicz, Andrzej243260 49.30
414 Kallai, Gabor243257 28.53
415 Matlak, Marek243254 21.44
416 Benko, Pal C243263 59.13
417 Hamann, Svend243172 46.90
418 Gruenenwald, Joerg243169 22.24
419 Schulte, Oliver243165 18.69
420 Ost Hansen, Jacob243174
421 Ochoa de Echaguen, F Javier243158 32.98
422 Thipsay, Praveen Mahadeo243058 28.05
423 Schoenthier, Frank243075 28.79
424 Kouatly, Bachar243050 29.49
425 Hug, Werner242957 34.97
426 Horvath, Tamas242957 35.86
427 Casper, Thomas242955 28.46
428 Lengyel, Levente242966 54.22
429 Sendera, Jaroslaw242969 22.35
430 Sanna, Gianlazzaro242872 27.39
431 Horváth, Csaba242860 19.24
432 Mariotti, Sergio242763 41.06
433 Zagrebelny, Sergey242775
434 Szmetan, Jorge242775 37.26
435 Schneider, Attila242658 32.38
436 Wolff, Patrick G242656 19.54
437 Garcia, Gildardo242661 33.48
438 Ligterink, Gert242553 37.79
439 Motwani, Paul242561 25.22
440 Paulsen, Dirk242566 28.59
441 Bany, Jerzy242453 26.49
442 Jakobsen, Ole242461 44.87
443 Karsa, Laszlo242461 31.96
444 Mascarinas, Rico242470 34.50
445 Schweber, Samuel242475 51.12
446 Sznapik, Aleksander242352 36.56
447 Martinovic, Slobodan242358 42.10
448 Temirbaev, Serik242360
449 Soltis, Andrew E242262 40.26
450 Adams, Michael242264 15.79
451 Kuczynski, Robert242252 21.37
452 Kestler, Hans-Günter242270 47.72
453 Zahariev, Zahari242172 25.97
454 Robatsch, Karl242155 58.88
455 Toth, Bela242062 44.37
456 Paehtz, Thomas Sr242055 30.98
457 Ilic, Zoran242073 24.08
458 Hernandez, Roman242060 37.77
459 Ulibin, Mikhail242064 16.25
460 Trapl, Jindrich241973 45.44
461 Liang Jinrong241960 27.28
462 Ghitescu, Theodor241961 53.60
463 Sonntag, Hans Hubert241967
464 Brueckner, Thomas241962 24.10
465 Scheeren, Peter241861 32.09
466 McCambridge, Vincent241863 27.48
467 Grivas, Efstratios241865 21.42
468 Haik, Aldo241851 34.87
469 Toshkov, Tihomir241861 27.78
470 Orso, Miklos241868 31.23
471 Qi Jingxuan241861 39.81
472 Pelts, Roman241771 50.47
473 Wahls, Matthias241657 19.60
474 Doncevic, Dario241665 29.64
475 Barczay, Laszlo241659 51.53
476 Prandstetter, Eduard241652 38.71
477 Diaz, Joaquin C241656 39.15
478 Pliester, Leon241564 33.03
479 Gerusel, Mathias241571 49.57
480 Mainka, Romuald241568 24.29
481 Jasnikowski, Zbigniew241555 32.30
482 Karolyi, Tibor Jr241454 25.79
483 Garcia Martinez, Silvino241453 43.16
484 Gallagher, Joseph G241461 23.32
485 Davies, Nigel R241353 27.08
486 Sherzer, Alex241364 16.58
487 De Wit, Johannes S241273 22.92
488 Suetin, Alexey S241258 60.79
489 Breyther, Ruediger241273 34.01
490 Shvidler, Eliahu241156 27.70
491 Cvetkovic, Srdjan241174 41.51
492 Kristiansen, Jens241155 35.27
493 Ioseliani, Nana241170 25.55
494 Levitina, Irina S241069 33.23
495 Bohm, Hans241069 37.63
496 Milos, Gilberto241055 23.84
497 McNab, Colin Anderson241060 26.58
498 Bastian, Herbert241064 34.72
499 Bellin, Robert240971 35.17
500 Hartmann, Wolfram240973 31.27

These ratings, calculated as of August 31, 1987, incorporate all games (against rated opponents) played in the time between September 1, 1986 and August 31, 1987, along with the ratings that were already calculated as of August 31, 1986. 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, 1987. This represents the player's estimated strength on September 1, 1987.

+/- 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, 1987. The +/- value represents the standard deviation of that estimate; the player's true strength on September 1, 1987 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, 1987. 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, 1987. 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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