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Top 10 active players as of July 31, 1987


Top 500 active players as of July 31, 1987

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28424982.4% #124.30
2 Karpov, Anatoly E27634810.7% #536.19
3 Timman, Jan H2708481.2% #1935.63
4 Beliavsky, Alexander G2693490.7% #2633.62
5 Jussupow, Artur M2688490.6% #3027.47
6 Tal, Mikhail2685480.5% #3050.73
7 Vaganian, Rafael A2678490.3% #3535.79
8 Korchnoi, Viktor L2673470.3% #3856.36
9 Psakhis, Lev B2670480.2% #4128.67
10 Ljubojevic, Ljubomir2669480.2% #4036.74
11 Salov, Valery B2667500.2% #4423.18
12 Portisch, Lajos2667480.2% #4350.32
13 Polugaevsky, Lev A2661510.2% #4952.70
14 Hübner, Robert2659490.1% #4938.73
15 Seirawan, Yasser2658500.1% #5027.35
16 Short, Nigel D2658470.1% #4922.16
17 Tukmakov, Vladimir B2656490.1% #5241.38
18 Nikolic, Predrag2653510.1% #5426.89
19 Eingorn, Viacheslav S2652500.1% #5530.68
20 Khalifman, Alexander2650500.1% #5821.54
21 Ehlvest, Jaan2649520.1% #5924.80
22 Andersson, Ulf2648490.1% #5836.09
23 Gurevich, Mikhail N264849 #5828.44
24 Ribli, Zoltán2647490.1% #5935.90
25 Speelman, Jonathan S264749 #5930.83
26 Sax, Gyula2647490.1% #6036.12
27 Sokolov, Andrey Y264649 #6024.36
28 Miles, Anthony J264148 #6432.27
29 Balashov, Yury S263950 #6738.38
30 Chernin, Alexander M263649 #6927.40
31 Romanishin, Oleg M263548 #6935.56
32 Spassky, Boris V263549 #7050.50
33 Gelfand, Boris2634620.2% #8019.10
34 Dolmatov, Sergey V263350 #7328.45
35 Pintér, József263352 #7533.73
36 Agdestein, Simen262850 #7720.21
37 Gulko, Boris F262750 #7940.48
38 Lputian, Smbat G262649 #8029.46
39 Nunn, John D M262548 #7932.27
40 Gavrikov, Victor N262350 #8230.01
41 Vyzmanavin, Alexey261952 #8827.58
42 Vladimirov, Evgeny Y2617590.1% #9530.53
43 Malaniuk, Vladimir P261449 #9130.03
44 Lerner, Konstantin Z261150 #9437.42
45 Smagin, Sergey260951 #9828.90
46 Kuzmin, Gennady P260957 #10241.53
47 Hort, Vlastimil260450 #10343.55
48 Rozentalis, Eduardas260456 #10624.18
49 Dokhoian, Yury260354 #10822.76
50 Naumkin, Igor2601750.2% #12421.97
51 Kharitonov, Andrey Y260155 #10928.32
52 Christiansen, Larry M260151 #10631.09
53 Larsen, Bent260150 #10652.41
54 Bareev, Evgeny260051 #10820.69
55 Azmaiparashvili, Zurab A259952 #10827.37
56 Dorfman, Iosif D259957 #11335.25
57 Smyslov, Vassily V259750 #11066.35
58 Chandler, Murray G259748 #10927.32
59 Dvoiris, Semen I259757 #11528.74
60 Georgiev, Kiril259651 #11121.67
61 Yermolinsky, Alex V259655 #11429.30
62 Huzman, Alexander259553 #11525.31
63 Mikhalchishin, Adrian B259552 #11332.70
64 Sveshnikov, Evgeny E259450 #11337.47
65 Smirin, Ilia2594690.1% #12819.53
66 Dzindzichashvili, Roman Y259258 #12143.24
67 Ubilava, Elizbar E259151 #11636.92
68 Rashkovsky, Nukhim N259051 #11841.29
69 Yurtaev, Leonid259059 #12428.25
70 Kupreichik, Viktor D259050 #11838.08
71 Razuvaev, Yury S258950 #11941.81
72 Murey, Yakov258852 #12145.99
73 Kruppa, Yuri258656 #12623.11
74 Vasiukov, Evgeny A258059 #13554.40
75 Makarichev, Sergey Y257956 #13333.70
76 Gipslis, Aivars257970 #14350.48
77 Panchenko, Alexander N257855 #13433.82
78 Marjanovic, Slavoljub257850 #13032.57
79 Ftácnik, Lubomír257849 #13029.75
80 Geller, Efim P257751 #13162.41
81 Torre, Eugenio257751 #13235.74
82 Ivanchuk, Vassily257754 #13518.37
83 Nogueiras, Jesus257650 #13128.04
84 Pigusov, Evgeny257651 #13226.33
85 Panno, Oscar R257665 #14352.37
86 Zaichik, Gennady L257652 #13430.47
87 Hansen, Curt257550 #13322.87
88 Kochiev, Alexander257456 #13831.35
89 Novikov, Igor A257451 #13425.19
90 Kavalek, Lubomir257252 #13743.97
91 Kengis, Edvins257253 #13828.30
92 Dreev, Alexey257157 #14118.53
93 Yudasin, Leonid G257150 #13827.97
94 Podgaets, Mikhail Y257062 #14640.02
95 Chiburdanidze, Maia G256953 #14126.54
96 Popovic, Petar256950 #13928.46
97 Arkhipov, Sergey256854 #14233.11
98 Adorján, András256849 #14037.33
99 Glek, Igor V256659 #14825.73
100 Ivanov, Igor V256561 #15140.56
101 Hjartarson, Jóhann256449 24.48
102 Gheorghiu, Florin256350 43.32
103 van der Wiel, John T H256248 27.97
104 Suba, Mihai256149 40.16
105 Gorelov, Sergey G256158 29.95
106 Gligoric, Svetozar256155 64.49
107 Cámpora, Daniel H256152 30.09
108 Sosonko, Gennadi256050 44.20
109 Graf, Alexander255959 24.93
110 Anand, Viswanathan255855 17.64
111 Fedorowicz, John P255850 28.84
112 Kantsler, Boris255757 25.29
113 Goldin, Alexander255654 22.43
114 Karlsson, Lars255551 32.05
115 Benjamin, Joel L255450 23.39
116 Timoshchenko, Gennady255354 38.26
117 Kolarov, Atanas S255368 53.41
118 Tseshkovsky, Vitaly V255151 42.85
119 Shabanov, Yury F255059 49.72
120 Uhlmann, Wolfgang254951 52.34
121 Serper, Grigory254958 17.88
122 Shneider, Aleksandr254960 25.19
123 Yakovich, Yuri254951 24.67
124 Bagirov, Vladimir K254856 50.95
125 Knaak, Rainer F254850 34.37
126 Bönsch, Uwe254751 28.79
127 Cvitan, Ognjen254751 25.81
128 Garcia Palermo, Carlos254750 33.66
129 Quinteros, Miguel A254654 39.59
130 Olafsson, Helgi254650 30.95
131 Gufeld, Eduard E254460 51.37
132 Kaidanov, Gregory S254453 27.80
133 Kholmov, Ratmir D254357 62.22
134 Vaisser, Anatoli254354 38.40
135 Palatnik, Semen A254257 37.35
136 Osnos, Viacheslav V254270 52.02
137 Matanovic, Aleksandar254175 57.19
138 Epishin, Vladimir254158 22.05
139 Reshevsky, Samuel H253965 75.68
140 Korzubov, Peter253967 25.58
141 Alburt, Lev O253851 41.94
142 Neverov, Valery253854 23.11
143 Gruenfeld, Yehuda253852 31.42
144 Vorotnikov, Vladislav V253874 39.95
145 Lobron, Eric253749 27.23
146 Rogers, Ian253750 27.10
147 Spraggett, Kevin B253652 32.72
148 Pétursson, Margeir253549 27.46
149 Barlov, Dragan253552 30.50
150 Henley, Ron W253566 30.65
151 Chekhov, Valery A253552 31.68
152 Taimanov, Mark E253465 61.48
153 Sokolov, Ivan253355 19.13
154 Magerramov, Elmar S253361 29.31
155 Zapata, Alonso253350 28.94
156 Ekstroem, Roland253364 31.19
157 Smejkal, Jan253250 41.36
158 Kuzmin, Alexey253265 24.40
159 Browne, Walter S253252 38.56
160 Morovic Fernández, Iván E253156 24.35
161 Kudrin, Sergey253150 27.90
162 Kurajica, Bojan253054 39.71
163 Dueball, Juergen252874 42.34
164 Kindermann, Stefan252749 27.59
165 Didishko, Vereslav252665 38.31
166 García Gonzáles, Guillermo252650 33.64
167 Byrne, Robert E252559 59.28
168 Dlugy, Maxim252451 21.51
169 Groszpeter, Attila252453 27.14
170 Petrosian, Arshak B252454 33.62
171 Gaprindashvili, Nona252358 46.24
172 Csom, István252251 47.16
173 Velimirovic, Dragoljub252250 45.22
174 Ivanov, Alexander V252261 31.25
175 Inkiov, Ventzislav252251 31.20
176 Lukacs, Peter252049 37.06
177 Velikov, Petar251954 36.34
178 Oll, Lembit251952 21.27
179 Hulak, Krunoslav251851 36.18
180 Sturua, Zurab251866 28.15
181 Guseinov, Aidyn251662 35.58
182 Mestel, A Jonathan251653 30.38
183 Arnason, Jon L251650 26.72
184 London, Dimitri251663 24.69
185 Kovacevic, Vladimir251656 45.35
186 Nemet, Ivan251572 44.30
187 Lau, Ralf251550 27.78
188 Grigorian, Karen A251567 39.90
189 Ghinda, Mihail Viorel251555 38.02
190 Adianto, Utut251460 22.37
191 Barbero, Gerardo F251357 25.94
192 Lein, Anatoly251354 56.34
193 Watson, William N251251 25.29
194 Wedberg, Tom251155 33.68
195 Sunye Neto, Jaime251052 30.24
196 Loginov, Valery A251059 31.63
197 Antunes, Antonio251067 25.48
198 Greenfeld, Alon250954 23.29
199 Gomez Baillo, Jorge H250869 28.28
200 Hellers, Ferdinand250853 18.51
201 Nikolac, Juraj250765 55.27
202 Dautov, Rustem250762 21.67
203 Veingold, Aleksander250775 33.81
204 Aseev, Konstantin N250656 26.78
205 Meduna, Eduard250650 36.89
206 Ivkov, Borislav250654 53.72
207 Mokrý, Karel250649 28.48
208 Hazai, Laszlo250551 34.13
209 Birnboim, Nathan250453 36.68
210 Tringov, Georgy P250358 50.40
211 Unzicker, Wolfgang250357 62.10
212 Matulovic, Milan250360 52.14
213 Ivanovic, Božidar250354 40.93
214 Vitolinš, Alvis250362 41.13
215 Georgadze, Tamaz V250255 39.73
216 Ostermeyer, Peter250159 43.80
217 Hodgson, Julian M250150 24.02
218 Rodriguez, Amador250051 30.90
219 Klovans, Janis249960 52.31
220 Cifuentes Parada, Roberto249965 29.61
221 Marin, Mihail249857 22.28
222 Lalic, Bogdan249859 23.40
223 Georgiev, Krum249752 29.19
224 Basin, Leonid249765 29.69
225 Illescas Cordoba, Miguel249654 21.66
226 Vogt, Lothar H249652 35.54
227 Stohl, Igor249651 22.84
228 Govedarica, Radovan249661 39.46
229 Barua, Dibyendu249658 20.76
230 Cebalo, Mišo249651 42.48
231 Todorcevic, Miodrag249454 46.72
232 Fokin, Sergey249470 31.80
233 Plaskett, Jim249452 27.37
234 Shamkovich, Leonid A249459 64.16
235 Rukavina, Josip249357 44.67
236 Wilder, Michael249354 24.87
237 Lanka, Zigurds249261 27.19
238 Schussler, Harry249154 30.10
239 Vukic, Milan249165 43.94
240 Abramovic, Boško249153 36.46
241 Pytel, Krzysztof249165 42.21
242 Joksic, Sinisa249073 46.81
243 Bischoff, Klaus249052 26.14
244 Soppe, Guillermo249069 26.87
245 Mednis, Edmar J248965 50.36
246 Donchev, Dimitar I248954 29.03
247 Gutman, Lev248850 41.85
248 Winants, Luc248753 24.58
249 Hebden, Mark248756 29.46
250 Van der Sterren, Paul248750 31.37
251 Legky, Nikolay A248668 32.30
252 Gurevich, Dmitry248651 30.89
253 Kalinitschew, Sergey248666 31.49
254 Faragó, Iván248548 41.33
255 Hickl, Joerg248454 22.29
256 Stoica, Valentin248459 37.46
257 Tischbierek, Raj248451 24.85
258 Ernst, Thomas248353 26.95
259 Reyes, Juan248365 24.26
260 Seret, Jean Luc248361
261 Popchev, Milko248357 22.72
262 Xu Jun248352 24.87
263 Dizdar, Goran248354 28.66
264 Raicevic, Momcilo248364
265 Filipenko, Alexander V248275 38.41
266 deFirmian, Nicholas E248251 30.01
267 Simic, Radoslav248264 39.14
268 Vera, Reynaldo248253 26.56
269 Staniszewski, Piotr248253 20.91
270 Mnatsakanian, Eduard A248163 48.65
271 Bukal, Vladimir Sr248161 47.75
272 Pfleger, Helmut248160 43.98
273 Wirthensohn, Heinz248060 36.24
274 Kogan, Boris248057
275 Foisor, Ovidiu248052 28.32
276 Ermenkov, Evgenij248054 37.84
277 Hawelko, Marek247852 27.97
278 Drasko, Milan247752 24.65
279 Ionescu, Constantin247753 28.88
280 Sideif Sade, Fikret I247658 35.58
281 Klaric, Zlatko247565 30.77
282 Petrushin, Alexander I247569 40.39
283 Schneider, Lars Ake247556
284 Cramling, Dan247463 28.49
285 Yrjola, Jouni247451 27.77
286 Mortensen, Erling247352 32.32
287 Nikolic, Zivoslav247356 33.63
288 Řgaard, Leif247258 35.57
289 Kremenetsky, Anatoly M247274 48.55
290 Tisdall, Jonathan D247256 28.92
291 Flear, Glenn C247249 28.47
292 Piket, Jeroen247256 18.51
293 Andres Mendez, Miguel247263
294 Plachetka, Jan247251 42.45
295 Portisch, Ferenc247263 48.31
296 Knezevic, Milorad247151 50.75
297 Belov, Igor247063
298 Vaulin, Alexander247069 30.37
299 Gurgenidze, Bukhuti I247054 53.72
300 Popov, Luben247067 51.51
301 Rivas Pastor, Manuel247057 27.05
302 Ree, Hans246954 42.88
303 Espig, Lutz246955 38.57
304 Szabó, László246970 70.37
305 Lombardy, William J246860 49.66
306 Wolf, Volker246864 29.90
307 Lechtynsky, Jiri246853 39.68
308 Szekely, Peter246756 32.48
309 Moskalenko, Viktor246771 26.66
310 Frias, Victor J246769 31.47
311 Hecht, Hans-Joachim246764 48.51
312 Ziatdinov, Raset246672 28.59
313 Nun, Josef246568 54.02
314 Pekarek, Ales246452 25.62
315 Spassov, Liuben246456 44.36
316 Rajkovic, Dusan246458 45.12
317 Eslon, Jaan246368 35.41
318 Ostojic, Predrag246372 49.44
319 Imanaliev, Taalaibek246271
320 Barbulescu, Dan246255 23.11
321 Jansa, Vlastimil246250 44.68
322 Jelen, Iztok246272 40.53
323 Sahovic, Dragutin246262 46.97
324 Fernandez Garcia, Jose Luis246156 33.24
325 Janovsky, Sergey246176 27.45
326 Marangunic, Srdjan246066 43.75
327 Tatai, Stefano246056 49.36
328 Li Zunian245959 29.56
329 Renet, Olivier245951 22.61
330 Rakic, Tomislav245965 52.72
331 Veinger, Itzhak245857 49.07
332 Zaitsev, Igor A245874 49.18
333 Klundt, Klaus245870 45.60
334 Filipovic, Branko245760 29.82
335 Lanc, Alois245751 39.45
336 Tempone, Marcelo245673 24.90
337 Valkesalmi, Kimmo245655 26.25
338 Karpman, Vadim245669 22.22
339 Hjorth, Greg245668 24.05
340 Shirov, Alexei245673 15.07
341 Ambroz, Jan245658 33.12
342 Schmidt, Wlodzimierz245649 44.31
343 Yap, Andronico245557
344 Horvath, Jozsef245552 22.96
345 Velickovic, Sasa245276 36.33
346 Kosten, Anthony C245158 29.02
347 Tseitlin, Mikhail S245165 40.12
348 Giorgadze, Giorgi245166 22.81
349 Blatny, Pavel245154 19.11
350 Sharif, Mershad245157 35.05
351 Hermann, Manfred245067 44.92
352 Lukin, Andrei M245066 38.92
353 Bany, Jerzy245054 26.41
354 Klinger, Josef244951 20.15
355 Womacka, Mathias244974 21.10
356 Ricardi, Pablo244858 25.43
357 Ardiansyah, Haji244859 35.65
358 Hartston, William R244875 39.96
359 Gauglitz, Gernot244857 25.09
360 Kirov Ivanov, Nino244854 41.89
361 Shtyrenkov, Veniamen244767 29.27
362 Helmers, Knut J244766 30.48
363 Pedersen, Erik244762 28.89
364 Murshed, Niaz244660 21.22
365 Sigurjónsson, Gudmundur244656 39.85
366 Renman, Nils Gustaf244660
367 Talavera, JC.244669
368 Ornstein, Axel244556 35.27
369 Vokác, Marek244558 28.65
370 Wockenfuss, Klaus244458 35.92
371 Ryskin, Alexander244472 24.55
372 Potts, Alan244367
373 Gruenberg, Hans Ulrich244355 31.56
374 McNab, Colin Anderson244360 26.49
375 Polgar, Zsuzsa244350 18.28
376 Thorsteins, Karl244358 22.80
377 Kurtenkov, Atanas244363 23.99
378 Kolev, Atanas244262 20.04
379 Braga, Fernando244261 29.06
380 Efimov, Igor244266 26.87
381 Hertneck, Gerald244154 23.87
382 Rodriguez, Ruben244068 40.65
383 Krasenkow, Michal244067 23.71
384 Pribyl, Josef244057 39.80
385 Rohde, Michael A244054 27.92
386 Piesina, Gintautas244075 35.31
387 Lazic, Miroljub244071 21.09
388 Rachels, Stuart243862 17.85
389 Kraidman, Yair243864 54.75
390 Ye Jiangchuan243863 26.70
391 Meyer, E.243876
392 Radulov, Ivan243755 48.56
393 Mencinger, Vojko243767 29.32
394 Lalev, Dimitar243671 27.54
395 Wittmann, Walter243656 39.38
396 Semkov, Semko243658 27.42
397 Heinbuch, Detlef243659 26.56
398 Khasin, Alexander243565 36.26
399 Rigo, Janos243562 38.76
400 Rodriguez Vargas, Orestes243561 44.07
401 Reeh, Oliver243561 23.53
402 Verduga, Denis Homero243561
403 Nun, Jiri243459 30.01
404 Akhmilovskaya, Elena243461
405 Spiridonov, Nikola243454 49.42
406 Ochoa de Echaguen, F Javier243458 32.91
407 Condie, Mark L243457 22.47
408 Ost Hansen, Jacob243374
409 Hamann, Svend243372 46.81
410 Handoko, Edhi243360 26.92
411 Matlak, Marek243354 21.36
412 Motwani, Paul243364 25.13
413 Schulte, Oliver243365 18.61
414 Thipsay, Praveen Mahadeo243358 27.96
415 Bielczyk, Jacek243356 34.44
416 Benko, Pal C243263 59.04
417 King, Daniel J243152 23.92
418 Kouatly, Bachar243150 29.41
419 Hug, Werner243157 34.89
420 Schneider, Attila243158 32.30
421 Sznapik, Aleksander243051 36.47
422 Soltis, Andrew E243063 40.17
423 Kuligowski, Adam243056 31.60
424 Horváth, Csaba243059 19.15
425 Kamsky, Gata242973 13.16
426 Sendera, Jaroslaw242969 22.26
427 Akesson, Ralf242960 26.48
428 Sanna, Gianlazzaro242872 27.30
429 Wiedenkeller, Michael242854 24.56
430 Hernandez, Roman242859 37.69
431 Zagrebelny, Sergey242875
432 Filipowicz, Andrzej242860 49.22
433 Solozhenkin, Evgeniy242869 20.99
434 Paulsen, Dirk242867 28.51
435 Wolff, Patrick G242856 19.46
436 Casper, Thomas242855 28.37
437 Mariotti, Sergio242763 40.97
438 Ligterink, Gert242754 37.70
439 Lengyel, Levente242765 54.13
440 Horvath, Tamas242757 35.77
441 Garcia, Gildardo242661 33.39
442 Nickoloff, Bryon242566 31.11
443 Jakobsen, Ole242561 44.78
444 Robatsch, Karl242555 58.80
445 Temirbaev, Serik242560
446 Mascarinas, Rico242470 34.41
447 Kveinys, Aloyzas242371 25.06
448 Gruenenwald, Joerg242371 22.16
449 Szmetan, Jorge242275 37.18
450 Shvidler, Eliahu242255 27.61
451 Ulibin, Mikhail242264 16.17
452 Doncevic, Dario242265 29.55
453 Martinovic, Slobodan242158 42.02
454 Matamoros Franco, Carlos S242161 20.62
455 McCambridge, Vincent242162 27.40
456 Ghitescu, Theodor242161 53.52
457 Bisguier, Arthur B242164 57.81
458 Sonntag, Hans Hubert242168
459 Trapl, Jindrich242073 45.35
460 Paehtz, Thomas Sr242055 30.91
461 Karsa, Laszlo242061 31.88
462 Liang Jinrong242060 27.19
463 Kallai, Gabor241958 28.44
464 Haik, Aldo241951 34.78
465 Zahariev, Zahari241972 25.89
466 Brueckner, Thomas241862 24.01
467 Kuczynski, Robert241852 21.29
468 Kestler, Hans-Günter241872 47.63
469 Garcia Martinez, Silvino241853 43.07
470 Barczay, Laszlo241859 51.44
471 Karolyi, Tibor Jr241853 25.71
472 Keitlinghaus, Ludger241863 22.02
473 Trepp, Markus241855
474 Pelts, Roman241771 50.39
475 Orso, Miklos241768 31.15
476 Toshkov, Tihomir241661 27.70
477 Ilic, Zoran241673 23.99
478 Schweber, Samuel241675 51.04
479 Damjanovic, Mato241664 60.36
480 Jasnikowski, Zbigniew241654 32.22
481 Gallagher, Joseph G241664 23.24
482 Diaz, Joaquin C241556 39.07
483 Prandstetter, Eduard241552 38.63
484 Hawksworth, John C241471 23.65
485 Toth, Bela241463 44.28
486 Sygulski, Artur241452 27.02
487 Forintos, Gyözö V241462 52.00
488 De Wit, Johannes S241473 22.85
489 Mainka, Romuald241468 24.21
490 Qi Jingxuan241361 39.73
491 Scheeren, Peter241361 32.00
492 Tashkhodzhaev, A.241276
493 Langeweg, Kick241267 50.40
494 Gerusel, Mathias241171 49.49
495 Ioseliani, Nana241170 25.47
496 Bastian, Herbert241064 34.64
497 Sherzer, Alex241064 16.50
498 Blees, Albert241061 24.93
499 Suetin, Alexey S241058 60.71
500 Bohm, Hans241068 37.54

These ratings, calculated as of July 31, 1987, incorporate all games (against rated opponents) played in the time between August 1, 1986 and July 31, 1987, along with the ratings that were already calculated as of July 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 July 31, 1987. This represents the player's estimated strength on August 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 August 1, 1987. The +/- value represents the standard deviation of that estimate; the player's true strength on August 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 August 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 July 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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