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Top 10 active players as of May 31, 1987


Top 500 active players as of May 31, 1987

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28364878.0% #124.13
2 Karpov, Anatoly E27704814.0% #536.02
3 Timman, Jan H2711471.5% #1835.46
4 Beliavsky, Alexander G2698491.0% #2433.46
5 Jussupow, Artur M2686490.6% #3027.30
6 Tal, Mikhail2685480.5% #3050.56
7 Ljubojevic, Ljubomir2684480.5% #3136.58
8 Psakhis, Lev B2681480.5% #3328.51
9 Hübner, Robert2676490.3% #3638.57
10 Khalifman, Alexander2667510.3% #4421.37
11 Vaganian, Rafael A2666490.2% #4335.63
12 Korchnoi, Viktor L2665470.1% #4356.19
13 Polugaevsky, Lev A2660500.2% #4852.53
14 Seirawan, Yasser2659490.2% #4927.19
15 Portisch, Lajos2657480.1% #5050.16
16 Tukmakov, Vladimir B2656490.1% #5241.21
17 Salov, Valery B2655510.1% #5323.01
18 Short, Nigel D2654470.1% #5121.99
19 Ehlvest, Jaan2651520.1% #5724.63
20 Sokolov, Andrey Y2651490.1% #5524.20
21 Eingorn, Viacheslav S2651500.1% #5630.52
22 Nikolic, Predrag2648500.1% #6026.72
23 Chernin, Alexander M264450 #6227.23
24 Ribli, Zoltán264349 #6235.73
25 Speelman, Jonathan S264149 #6430.66
26 Gurevich, Mikhail N263950 #6728.28
27 Sax, Gyula263850 #6735.95
28 Balashov, Yury S263650 #6938.22
29 Andersson, Ulf263549 #7035.92
30 Miles, Anthony J263448 #7032.11
31 Spassky, Boris V263249 #7350.34
32 Dolmatov, Sergey V263051 #7528.28
33 Lputian, Smbat G262949 #7729.30
34 Gavrikov, Victor N262250 #8329.84
35 Pintér, József262252 #8433.56
36 Vasiukov, Evgeny A2621670.2% #9554.24
37 Romanishin, Oleg M262148 #8335.39
38 Nunn, John D M261749 #8732.10
39 Agdestein, Simen261551 #9120.04
40 Malaniuk, Vladimir P261450 #9129.86
41 Lerner, Konstantin Z261450 #9237.26
42 Vladimirov, Evgeny Y261359 #10030.36
43 Smagin, Sergey261151 #9428.73
44 Gulko, Boris F261151 #9740.31
45 Gelfand, Boris2609630.1% #10618.93
46 Vyzmanavin, Alexey260953 #10027.41
47 Kuzmin, Gennady P260857 #10241.37
48 Hort, Vlastimil260650 #10043.39
49 Bareev, Evgeny260551 #10120.53
50 Christiansen, Larry M260451 #10330.92
51 Kharitonov, Andrey Y260354 #10628.16
52 Bronstein, David I2603750.2% #12263.28
53 Huzman, Alexander260254 #10725.14
54 Dorfman, Iosif D260257 #10935.08
55 Dokhoian, Yury260254 #10722.60
56 Sveshnikov, Evgeny E260151 #10537.30
57 Dvoiris, Semen I259857 #11428.58
58 Smyslov, Vassily V259850 #10966.19
59 Naumkin, Igor2598760.2% #12721.81
60 Larsen, Bent259850 #10952.24
61 Yermolinsky, Alex V259654 #11429.14
62 Chandler, Murray G259548 #11127.16
63 Azmaiparashvili, Zurab A259552 #11327.21
64 Mikhalchishin, Adrian B259551 #11332.54
65 Rozentalis, Eduardas259456 #11724.01
66 Yurtaev, Leonid259459 #12028.08
67 Smirin, Ilia2593700.1% #12819.36
68 Georgiev, Kiril259350 #11421.51
69 Razuvaev, Yury S259251 #11541.64
70 Kupreichik, Viktor D259050 #11837.91
71 Ubilava, Elizbar E258751 #12136.76
72 Adorján, András258450 #12337.17
73 Geller, Efim P258452 #12462.25
74 Rashkovsky, Nukhim N258451 #12541.12
75 Makarichev, Sergey Y258356 #12933.54
76 Glek, Igor V258059 #13425.57
77 Gipslis, Aivars257969 #14250.31
78 Panchenko, Alexander N257955 #13333.65
79 Nogueiras, Jesus257850 #13027.87
80 Panno, Oscar R257665 #14252.21
81 Torre, Eugenio257650 #13235.57
82 Parma, Bruno2576740.1% #14745.42
83 Arkhipov, Sergey257657 #13632.93
84 Zaichik, Gennady L257653 #13430.30
85 Podgaets, Mikhail Y257562 #14039.86
86 Kruppa, Yuri257556 #13722.94
87 Kavalek, Lubomir257452 #13543.81
88 Popovic, Petar257351 #13528.30
89 Novikov, Igor A257251 #13625.02
90 Marjanovic, Slavoljub257250 #13732.40
91 Goldin, Alexander257155 #14022.26
92 Kochiev, Alexander257155 #14131.18
93 Pigusov, Evgeny256952 #14026.17
94 Tarjan, James E256966 #15035.28
95 Dzindzichashvili, Roman Y256957 #14443.07
96 Hansen, Curt256851 #14122.70
97 Kengis, Edvins256853 #14228.14
98 Yudasin, Leonid G256650 #14227.81
99 van der Wiel, John T H256648 #14127.81
100 Gorelov, Sergey G256557 #14829.79
101 Dreev, Alexey256557 18.36
102 Chiburdanidze, Maia G256254 26.37
103 Ivanov, Igor V256260 40.40
104 Graf, Alexander256159 24.77
105 Sosonko, Gennadi256150 44.04
106 Shneider, Aleksandr256061 25.03
107 Fedorowicz, John P256050 28.68
108 Suba, Mihai256049 39.99
109 Alburt, Lev O256051 41.78
110 Gheorghiu, Florin255950 43.15
111 Ftácnik, Lubomír255949 29.59
112 Murey, Yakov255952 45.83
113 Gligoric, Svetozar255954 64.33
114 Karlsson, Lars255651 31.89
115 Timoshchenko, Gennady255554 38.09
116 Lobron, Eric255350 27.07
117 Uhlmann, Wolfgang255351 52.17
118 Bagirov, Vladimir K255356 50.79
119 Todorcevic, Miodrag255361 46.56
120 Knaak, Rainer F255350 34.21
121 Benjamin, Joel L255251 23.22
122 Kantsler, Boris255158 25.12
123 Reshevsky, Samuel H255165 75.51
124 Shabanov, Yury F254959 49.55
125 Olafsson, Helgi254850 30.79
126 Korzubov, Peter254868 25.41
127 Petrosian, Arshak B254856 33.46
128 Tseshkovsky, Vitaly V254851 42.68
129 Cámpora, Daniel H254753 29.92
130 Zapata, Alonso254751 28.78
131 Neverov, Valery254554 22.94
132 Smejkal, Jan254549 41.19
133 Vorotnikov, Vladislav V254566 39.79
134 Garcia Palermo, Carlos254450 33.50
135 Cvitan, Ognjen254451 25.64
136 Gufeld, Eduard E254460 51.20
137 Yakovich, Yuri254351 24.50
138 Anand, Viswanathan254159 17.47
139 Ivanchuk, Vassily254155 18.20
140 Spraggett, Kevin B254151 32.56
141 Kuzmin, Alexey254166 24.23
142 Quinteros, Miguel A254153 39.43
143 Kholmov, Ratmir D254057 62.05
144 Palatnik, Semen A253957 37.18
145 Vaisser, Anatoli253954 38.24
146 Arnason, Jon L253951 26.55
147 Osnos, Viacheslav V253870 51.85
148 Serper, Grigory253759 17.71
149 Didishko, Vereslav253665 38.14
150 Chekhov, Valery A253652 31.51
151 Rogers, Ian253650 26.93
152 Henley, Ron W253563 30.49
153 Bönsch, Uwe253452 28.63
154 Taimanov, Mark E253462 61.32
155 Kaidanov, Gregory S253254 27.64
156 Barlov, Dragan253152 30.34
157 Hjartarson, Jóhann253150 24.31
158 Byrne, Robert E253160 59.11
159 Kurajica, Bojan253154 39.54
160 Wedberg, Tom253058 33.51
161 Ekstroem, Roland253064 31.03
162 Epishin, Vladimir253058 21.89
163 Morovic Fernández, Iván E252956 24.19
164 Sturua, Zurab252766 27.97
165 Mestel, A Jonathan252652 30.22
166 Lukacs, Peter252650 36.89
167 Dueball, Juergen252574 42.17
168 Kindermann, Stefan252449 27.43
169 Gruenfeld, Yehuda252351 31.26
170 Ivanov, Alexander V252260 31.08
171 Browne, Walter S252152 38.39
172 Hulak, Krunoslav252152 36.02
173 Guseinov, Aidyn252063 35.41
174 Velikov, Petar252053 36.17
175 Inkiov, Ventzislav252051 31.03
176 García Gonzáles, Guillermo251950 33.48
177 Velimirovic, Dragoljub251951 45.05
178 Pétursson, Margeir251850 27.29
179 Csom, István251850 46.99
180 Dlugy, Maxim251751 21.34
181 Kovacevic, Vladimir251756 45.18
182 Oll, Lembit251652 21.11
183 Adianto, Utut251660 22.21
184 Greenfeld, Alon251553 23.12
185 Ostermeyer, Peter251559 43.64
186 Groszpeter, Attila251554 26.97
187 Lau, Ralf251450 27.62
188 Magerramov, Elmar S251463 29.14
189 Kudrin, Sergey251350 27.73
190 London, Dimitri251363 24.53
191 Gaprindashvili, Nona251259 46.08
192 Ghinda, Mihail Viorel251254 37.85
193 Nemet, Ivan251171 44.13
194 Aseev, Konstantin N251055 26.61
195 Antunes, Antonio251067 25.32
196 Watson, William N250951 25.12
197 Grigorian, Karen A250967 39.73
198 Vogt, Lothar H250953 35.37
199 Gomez Baillo, Jorge H250769 28.12
200 Lein, Anatoly250754 56.18
201 Schneider, Lars Ake250758
202 Dautov, Rustem250762 21.51
203 Nikolac, Juraj250665 55.11
204 Loginov, Valery A250658 31.47
205 Sunye Neto, Jaime250652 30.08
206 Hazai, Laszlo250651 33.96
207 Veingold, Aleksander250675 33.64
208 Unzicker, Wolfgang250657 61.92
209 Kolarov, Atanas S250669 53.25
210 Birnboim, Nathan250554 36.51
211 Faragó, Iván250548 41.16
212 Govedarica, Radovan250462 39.30
213 Mokrý, Karel250349 28.32
214 Cebalo, Mišo250250 42.32
215 Illescas Cordoba, Miguel250256 21.49
216 Ivanovic, Božidar250254 40.77
217 Matulovic, Milan250260 51.97
218 Hodgson, Julian M250151 23.85
219 Barbulescu, Dan250056 22.93
220 Ivkov, Borislav249953 53.55
221 Klovans, Janis249959 52.14
222 Cifuentes Parada, Roberto249865 29.44
223 Vitolinš, Alvis249862 40.95
224 Tringov, Georgy P249758 50.23
225 Barua, Dibyendu249758 20.59
226 Meduna, Eduard249651 36.72
227 Xu Jun249655 24.71
228 Van der Sterren, Paul249651 31.21
229 Lalic, Bogdan249559 23.23
230 Kremenetsky, Anatoly M249473 48.38
231 Basin, Leonid249363 29.52
232 Ree, Hans249254 42.71
233 Georgadze, Tamaz V249255 39.56
234 Wilder, Michael249254 24.71
235 Mednis, Edmar J249162 50.19
236 Rukavina, Josip249157 44.51
237 Plaskett, Jim249051 27.20
238 deFirmian, Nicholas E249050 29.85
239 Shamkovich, Leonid A249058 63.99
240 Georgiev, Krum248952 29.02
241 Staniszewski, Piotr248854 20.74
242 Soppe, Guillermo248869 26.71
243 Rodriguez, Amador248852 30.73
244 Stohl, Igor248851 22.68
245 Joksic, Sinisa248873 46.64
246 Tisdall, Jonathan D248859 28.76
247 Dizdar, Goran248855 28.49
248 Gurevich, Dmitry248751 30.72
249 Kuporosov, Viktor248771 25.68
250 Ernst, Thomas248652 26.79
251 Abramovic, Boško248653 36.30
252 Kalinitschew, Sergey248666 31.33
253 Hebden, Mark248655 29.29
254 Pytel, Krzysztof248663 42.04
255 Gofshtein, Leonid D248670 34.11
256 Lanka, Zigurds248660 27.03
257 Yrjola, Jouni248552 27.60
258 Sokolov, Ivan248557 18.96
259 Jansa, Vlastimil248550 44.51
260 Hellers, Ferdinand248553 18.34
261 Vukic, Milan248465 43.78
262 Flear, Glenn C248450 28.30
263 Seret, Jean Luc248461
264 Plachetka, Jan248351 42.29
265 Filipenko, Alexander V248375 38.24
266 Stoica, Valentin248359 37.29
267 Ionescu, Constantin248254 28.72
268 Mnatsakanian, Eduard A248263 48.48
269 Barbero, Gerardo F248259 25.78
270 Simic, Radoslav248264 38.97
271 Tischbierek, Raj248251 24.69
272 Donchev, Dimitar I248154 28.86
273 Moskalenko, Viktor248172 26.49
274 Raicevic, Momcilo248064
275 Ziatdinov, Raset248073 28.43
276 Kogan, Boris248056
277 Bischoff, Klaus248052 25.97
278 Reyes, Juan248065 24.10
279 Schussler, Harry247953 29.93
280 Pfleger, Helmut247959 43.82
281 Franco Ocampos, Zenon247974 31.05
282 Drasko, Milan247853 24.48
283 Wirthensohn, Heinz247860 36.07
284 Winants, Luc247753 24.41
285 Bukal, Vladimir Sr247760 47.58
286 Fernandez Garcia, Jose Luis247758 33.08
287 Gurgenidze, Bukhuti I247655 53.55
288 Popchev, Milko247656 22.55
289 Gutman, Lev247650 41.68
290 Klaric, Zlatko247664 30.60
291 Hawelko, Marek247552 27.81
292 Hickl, Joerg247555 22.12
293 Khasin, Alexander247564 36.09
294 Lanc, Alois247452 39.29
295 Nikolic, Zivoslav247456 33.47
296 Řgaard, Leif247257 35.40
297 Lechtynsky, Jiri247252 39.52
298 Vaulin, Alexander247169 30.20
299 Portisch, Ferenc247162 48.14
300 Rajkovic, Dusan247058 44.95
301 Vera, Reynaldo247054 26.40
302 Szekely, Peter247056 32.31
303 Pekarek, Ales246951 25.46
304 Legky, Nikolay A246969 32.14
305 Petrushin, Alexander I246966 40.22
306 Andres Mendez, Miguel246863
307 Piket, Jeroen246856 18.34
308 Popov, Luben246867 51.34
309 Tatai, Stefano246857 49.19
310 Espig, Lutz246755 38.40
311 Helmers, Knut J246762 30.32
312 Ermenkov, Evgenij246754 37.67
313 Szabó, László246670 70.20
314 Klundt, Klaus246670 45.43
315 Hecht, Hans-Joachim246564 48.34
316 Rakic, Tomislav246566 52.55
317 Rivas Pastor, Manuel246456 26.88
318 Lukin, Andrei M246463 38.76
319 Wolf, Volker246364 29.73
320 Spassov, Liuben246355 44.19
321 Knezevic, Milorad246251 50.58
322 Ostojic, Predrag246172 49.28
323 Reeh, Oliver246161 23.37
324 Li Zunian246058 29.40
325 Imanaliev, Taalaibek245971
326 Cramling, Dan245960 28.32
327 Lombardy, William J245859 49.49
328 Kolev, Atanas245864 19.88
329 Sahovic, Dragutin245862 46.81
330 Janovsky, Sergey245876 27.29
331 Zaitsev, Igor A245774 49.01
332 Veinger, Itzhak245757 48.90
333 Foisor, Ovidiu245754 28.15
334 Marangunic, Srdjan245666 43.58
335 Tempone, Marcelo245673 24.73
336 Efimov, Igor245666 26.71
337 Forintos, Gyözö V245563 51.84
338 Eslon, Jaan245563 35.24
339 Pachmann, Ludek245475 63.05
340 Horvath, Jozsef245453 22.80
341 Karpman, Vadim245469 22.05
342 Filipovic, Branko245460 29.65
343 Giorgadze, Giorgi245467 22.64
344 Sideif Sade, Fikret I245358 35.41
345 Shirov, Alexei245373 14.91
346 Pedersen, Erik245362 28.72
347 Yap, Andronico245257
348 Hjorth, Greg245267 23.88
349 Murshed, Niaz245260 21.05
350 Peters, John A245175 36.31
351 Fokin, Sergey245070 31.63
352 Suetin, Alexey S245061 60.54
353 Hermann, Manfred245067 44.75
354 Velickovic, Sasa245076 36.16
355 Tseitlin, Mikhail S245064 39.95
356 Schmidt, Wlodzimierz244949 44.14
357 Renet, Olivier244951 22.44
358 Ardiansyah, Haji244859 35.49
359 Marin, Mihail244863 22.11
360 Valkesalmi, Kimmo244857 26.08
361 Kosten, Anthony C244759 28.85
362 Semkov, Semko244758 27.26
363 Thorhallsson, Throstur244761 18.20
364 Klinger, Josef244751 19.98
365 Renman, Nils Gustaf244660
366 Hartston, William R244673 39.80
367 Ricardi, Pablo244658 25.27
368 Vokác, Marek244556 28.48
369 Nun, Josef244475 53.86
370 McNab, Colin Anderson244460 26.33
371 Bany, Jerzy244454 26.24
372 Shtyrenkov, Veniamen244467 29.11
373 Frias, Victor J244370 31.31
374 Matlak, Marek244355 21.19
375 Kirov Ivanov, Nino244354 41.73
376 Sharif, Mershad244358 34.89
377 Gauglitz, Gernot244361 24.92
378 Womacka, Mathias244274 20.92
379 Ornstein, Axel244255 35.10
380 Talavera, JC.244269
381 Rachels, Stuart244163 17.68
382 Kurtenkov, Atanas244163 23.83
383 Gruenberg, Hans Ulrich244156 31.39
384 Sigurjónsson, Gudmundur244056 39.68
385 Mortensen, Erling244054 32.15
386 Barczay, Laszlo244063 51.28
387 Ambroz, Jan244063 32.95
388 King, Daniel J243952 23.76
389 Nun, Jiri243957 29.84
390 Krasenkow, Michal243967 23.55
391 Braga, Fernando243960 28.89
392 Polgar, Zsuzsa243851 18.12
393 Ligterink, Gert243855 37.54
394 Wockenfuss, Klaus243857 35.76
395 Haik, Aldo243850 34.62
396 Thorsteins, Karl243858 22.63
397 Ye Jiangchuan243863 26.53
398 Hertneck, Gerald243755 23.70
399 Wittmann, Walter243756 39.22
400 Kraidman, Yair243764 54.58
401 Rohde, Michael A243655 27.76
402 Lengyel, Levente243666 53.96
403 Akesson, Ralf243657 26.31
404 Jakobsen, Ole243560 44.62
405 Lazic, Miroljub243573 20.92
406 Radulov, Ivan243555 48.40
407 Rodriguez Vargas, Orestes243561 43.91
408 Benko, Pal C243463 58.88
409 Akhmilovskaya, Elena243461
410 Bielczyk, Jacek243456 34.27
411 Spiridonov, Nikola243354 49.26
412 Paulsen, Dirk243366 28.34
413 Thipsay, Praveen Mahadeo243357 27.80
414 Lalev, Dimitar243269 27.37
415 Martinovic, Slobodan243256 41.85
416 Kelecevic, Nedeljko243275 40.22
417 Sznapik, Aleksander243151 36.31
418 Kallai, Gabor243058 28.28
419 Rodriguez, Ruben243070 40.48
420 Sarwinski, Miroslaw242960 33.38
421 Schneider, Attila242959 32.13
422 Santo Roman, Marc242969 26.72
423 Potts, Alan242869
424 Heinbuch, Detlef242859 26.39
425 Motwani, Paul242862 24.96
426 Verduga, Denis Homero242861
427 Robatsch, Karl242855 58.63
428 Handoko, Edhi242760 26.76
429 Casper, Thomas242758 28.21
430 Rigo, Janos242662 38.59
431 Kveinys, Aloyzas242671 24.89
432 Hernandez, Roman242659 37.52
433 Sendera, Jaroslaw242569 22.10
434 Qi Jingxuan242559 39.56
435 Solozhenkin, Evgeniy242569 20.83
436 Sanna, Gianlazzaro242572 27.14
437 Temirbaev, Serik242560
438 Wolff, Patrick G242559 19.29
439 Kamsky, Gata242573 12.99
440 Sherzer, Alex242567 16.33
441 Mariotti, Sergio242363 40.81
442 Ost Hansen, Jacob242267
443 Szmetan, Jorge242275 37.01
444 Borm, Franciscus WM242170
445 Ghitescu, Theodor242161 53.35
446 Kuligowski, Adam242155 31.44
447 Ulibin, Mikhail242164 15.99
448 Hug, Werner242156 34.72
449 De Wit, Johannes S242068 22.68
450 Garcia, Gildardo242061 33.23
451 Bisguier, Arthur B242063 57.65
452 Liang Jinrong242060 27.03
453 Kouatly, Bachar242051 29.24
454 Doncevic, Dario242065 29.39
455 Ochoa de Echaguen, F Javier242061 32.74
456 McCambridge, Vincent241962 27.23
457 Zahariev, Zahari241973 25.72
458 Bastian, Herbert241962 34.47
459 Jasnikowski, Zbigniew241955 32.05
460 Kuczynski, Robert241952 21.12
461 Bohm, Hans241864 37.38
462 Blatny, Pavel241854 18.94
463 Condie, Mark L241856 22.30
464 Mascarinas, Rico241770 34.25
465 Schulte, Oliver241765 18.44
466 Wiedenkeller, Michael241753 24.39
467 Pelts, Roman241771 50.22
468 Raicevic, Vladimir241658 38.08
469 Filipowicz, Andrzej241660 49.05
470 Pribyl, Josef241659 39.64
471 Davies, Nigel R241656 26.83
472 Sonntag, Hans Hubert241668
473 Garcia Martinez, Silvino241554 42.91
474 Matamoros Franco, Carlos S241562 20.46
475 Mainka, Romuald241568 24.04
476 Schweber, Samuel241475 50.87
477 Toshkov, Tihomir241461 27.53
478 Kristiansen, Jens241454 35.02
479 Schulz, Klaus Juergen241457
480 Danailov, Silvio241456 26.11
481 Sygulski, Artur241451 26.86
482 Gruenenwald, Joerg241471 21.98
483 Trapl, Jindrich241464 45.19
484 Gallagher, Joseph G241464 23.07
485 Hawksworth, John C241370 23.48
486 Soltis, Andrew E241362 40.01
487 Ilic, Zoran241374 23.83
488 Luczak, Andrzej241368 38.49
489 Shvidler, Eliahu241256 27.45
490 Grivas, Efstratios241265 21.17
491 Djuric, Stefan241153 31.85
492 Damjanovic, Mato241164 60.19
493 Paehtz, Thomas Sr241155 30.74
494 Damljanovic, Branko241058 25.95
495 Diaz, Joaquin C241056 38.90
496 Blees, Albert241060 24.77
497 Prandstetter, Eduard241051 38.46
498 Milos, Gilberto241059 23.59
499 Hartmann, Wolfram240973 31.02
500 Horvath, Tamas240959 35.61

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