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Top 10 active players as of April 30, 1987


Top 500 active players as of April 30, 1987

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28424881.3% #124.05
2 Karpov, Anatoly E27684811.7% #535.93
3 Timman, Jan H2698470.6% #2435.38
4 Beliavsky, Alexander G2698490.8% #2533.37
5 Jussupow, Artur M2697500.9% #2627.21
6 Tal, Mikhail2686480.4% #3150.47
7 Ljubojevic, Ljubomir2686480.4% #3136.49
8 Psakhis, Lev B2683480.4% #3328.42
9 Hübner, Robert2675490.3% #3838.48
10 Khalifman, Alexander2669510.3% #4321.28
11 Korchnoi, Viktor L2668470.1% #4256.10
12 Tukmakov, Vladimir B2665500.2% #4641.12
13 Portisch, Lajos2662480.1% #4750.07
14 Polugaevsky, Lev A2661500.2% #4952.44
15 Seirawan, Yasser2659490.1% #5027.10
16 Sokolov, Andrey Y2659490.1% #5124.11
17 Salov, Valery B2655520.1% #5522.92
18 Short, Nigel D2655470.1% #5321.91
19 Vaganian, Rafael A2652500.1% #5735.54
20 Ehlvest, Jaan2652520.1% #5824.54
21 Eingorn, Viacheslav S2647500.1% #6130.43
22 Nikolic, Predrag2646510.1% #6226.64
23 Chernin, Alexander M2645500.1% #6227.15
24 Ribli, Zoltán264449 #6335.65
25 Andersson, Ulf264250 #6535.84
26 Spassky, Boris V263849 #6850.25
27 Sax, Gyula263850 #6935.87
28 Balashov, Yury S263650 #7138.13
29 Dolmatov, Sergey V263551 #7328.19
30 Speelman, Jonathan S263549 #7230.58
31 Gurevich, Mikhail N263350 #7428.19
32 Vasiukov, Evgeny A2632660.3% #8554.15
33 Lputian, Smbat G263049 #7729.21
34 Miles, Anthony J262947 #7632.02
35 Gavrikov, Victor N262350 #8429.75
36 Pintér, József262352 #8533.47
37 Vladimirov, Evgeny Y262058 #9330.28
38 Nunn, John D M261849 #8832.01
39 Romanishin, Oleg M261749 #8935.30
40 Lerner, Konstantin Z261550 #9237.17
41 Malaniuk, Vladimir P261450 #9329.78
42 Gulko, Boris F261351 #9540.22
43 Kuzmin, Gennady P261357 #10041.28
44 Agdestein, Simen261251 #9519.95
45 Smagin, Sergey261251 #9628.64
46 Gelfand, Boris2612630.1% #10618.85
47 Bareev, Evgeny261051 #9920.44
48 Vyzmanavin, Alexey260953 #10027.33
49 Dorfman, Iosif D260955 #10234.99
50 Hort, Vlastimil260650 #10143.30
51 Kharitonov, Andrey Y260554 #10628.07
52 Christiansen, Larry M260551 #10430.84
53 Azmaiparashvili, Zurab A260552 #10427.12
54 Dokhoian, Yury260554 #10622.51
55 Bronstein, David I2603750.2% #12363.20
56 Huzman, Alexander260354 #10825.05
57 Sveshnikov, Evgeny E260351 #10537.22
58 Naumkin, Igor2600760.2% #12621.72
59 Dvoiris, Semen I260057 #11428.49
60 Chandler, Murray G259949 #10927.07
61 Yermolinsky, Alex V259954 #11229.05
62 Ubilava, Elizbar E259951 #11036.68
63 Smyslov, Vassily V259850 #11166.10
64 Larsen, Bent259850 #11052.15
65 Rozentalis, Eduardas259656 #11723.92
66 Mikhalchishin, Adrian B259651 #11532.45
67 Yurtaev, Leonid259459 #12127.99
68 Razuvaev, Yury S259351 #11641.55
69 Novikov, Igor A259351 #11824.93
70 Smirin, Ilia259270 #13119.28
71 Kupreichik, Viktor D259250 #11737.82
72 Zaichik, Gennady L258954 #12230.22
73 Torre, Eugenio258851 #12235.49
74 Rashkovsky, Nukhim N258651 #12341.03
75 Geller, Efim P258652 #12562.16
76 Adorján, András258550 #12537.08
77 Makarichev, Sergey Y258456 #13033.45
78 Nogueiras, Jesus258350 #12727.79
79 Glek, Igor V258159 #13425.48
80 Panchenko, Alexander N258155 #13233.57
81 Kengis, Edvins258154 #13128.05
82 Gipslis, Aivars258069 #14250.23
83 Georgiev, Kiril258052 #13021.42
84 Arkhipov, Sergey257857 #13532.85
85 Panno, Oscar R257765 #14352.12
86 Kruppa, Yuri257756 #13622.86
87 Parma, Bruno257774 #14845.33
88 Hansen, Curt257750 #13322.62
89 Podgaets, Mikhail Y257662 #14239.77
90 Kavalek, Lubomir257652 #13543.72
91 van der Wiel, John T H257548 #13327.72
92 Goldin, Alexander257455 #13822.18
93 Kochiev, Alexander257355 #13931.10
94 Popovic, Petar257351 #13728.21
95 Knaak, Rainer F257251 #13834.12
96 Pigusov, Evgeny257251 #13826.08
97 Marjanovic, Slavoljub257150 #13932.32
98 Dzindzichashvili, Roman Y257057 #14442.98
99 Tarjan, James E256966 #15135.19
100 Yudasin, Leonid G256850 #14227.73
101 Suba, Mihai256849 39.91
102 Gorelov, Sergey G256857 29.70
103 Dreev, Alexey256657 18.28
104 Graf, Alexander256359 24.68
105 Chiburdanidze, Maia G256354 26.29
106 Gligoric, Svetozar256354 64.24
107 Ivanov, Igor V256260 40.31
108 Sosonko, Gennadi256150 43.94
109 Shneider, Aleksandr256161 24.93
110 Alburt, Lev O256151 41.69
111 Fedorowicz, John P256150 28.59
112 Ftácnik, Lubomír256149 29.50
113 Murey, Yakov255952 45.74
114 Timoshchenko, Gennady255853 38.01
115 Gheorghiu, Florin255851 43.07
116 Karlsson, Lars255551 31.80
117 Lobron, Eric255450 26.97
118 Kantsler, Boris255358 25.04
119 Bagirov, Vladimir K255256 50.71
120 Vorotnikov, Vladislav V255266 39.70
121 Reshevsky, Samuel H255265 75.43
122 Benjamin, Joel L255251 23.14
123 Tseshkovsky, Vitaly V255251 42.60
124 Uhlmann, Wolfgang255251 52.09
125 Shabanov, Yury F255159 49.47
126 Petrosian, Arshak B255056 33.37
127 Olafsson, Helgi254950 30.71
128 Cámpora, Daniel H254853 29.83
129 Korzubov, Peter254768 25.33
130 Zapata, Alonso254751 28.69
131 Arnason, Jon L254650 26.46
132 Neverov, Valery254654 22.86
133 Yakovich, Yuri254551 24.42
134 Cvitan, Ognjen254551 25.55
135 Anand, Viswanathan254560 17.39
136 Gufeld, Eduard E254560 51.11
137 Vaisser, Anatoli254453 38.15
138 Smejkal, Jan254449 41.11
139 Spraggett, Kevin B254452 32.47
140 Kuzmin, Alexey254366 24.14
141 Didishko, Vereslav254265 38.05
142 Ivanchuk, Vassily254255 18.12
143 Kholmov, Ratmir D254157 61.96
144 Quinteros, Miguel A254153 39.34
145 Palatnik, Semen A254057 37.09
146 Kaidanov, Gregory S254054 27.55
147 Chekhov, Valery A253952 31.43
148 Osnos, Viacheslav V253970 51.77
149 Garcia Palermo, Carlos253950 33.41
150 Serper, Grigory253859 17.63
151 García Gonzáles, Guillermo253751 33.39
152 Bönsch, Uwe253651 28.54
153 Henley, Ron W253663 30.40
154 Taimanov, Mark E253562 61.23
155 Morovic Fernández, Iván E253456 24.10
156 Rogers, Ian253450 26.85
157 Hjartarson, Jóhann253250 24.23
158 Wedberg, Tom253158 33.43
159 Epishin, Vladimir253158 21.80
160 Byrne, Robert E253160 59.03
161 Barlov, Dragan253152 30.25
162 Kurajica, Bojan253154 39.46
163 Ekstroem, Roland253064 30.93
164 Sturua, Zurab252966 27.89
165 Ivanov, Alexander V252860 30.99
166 Mestel, A Jonathan252752 30.13
167 Kindermann, Stefan252749 27.34
168 Dueball, Juergen252574 42.09
169 Gruenfeld, Yehuda252351 31.17
170 Browne, Walter S252252 38.30
171 Hulak, Krunoslav252152 35.92
172 Velikov, Petar252053 36.08
173 Velimirovic, Dragoljub252051 44.96
174 Inkiov, Ventzislav252051 30.94
175 Csom, István252050 46.91
176 Oll, Lembit251952 21.02
177 Pétursson, Margeir251850 27.21
178 Dlugy, Maxim251750 21.25
179 Sunye Neto, Jaime251752 29.99
180 Faragó, Iván251649 41.08
181 Adianto, Utut251660 22.12
182 Ostermeyer, Peter251659 43.55
183 Lukacs, Peter251650 36.81
184 Kovacevic, Vladimir251655 45.09
185 Greenfeld, Alon251553 23.04
186 Barbulescu, Dan251557 22.85
187 Magerramov, Elmar S251563 29.05
188 Kudrin, Sergey251450 27.65
189 London, Dimitri251463 24.44
190 Gaprindashvili, Nona251359 45.98
191 Hazai, Laszlo251252 33.88
192 Lau, Ralf251250 27.53
193 Watson, William N251251 25.03
194 Barua, Dibyendu251158 20.51
195 Nemet, Ivan251171 44.04
196 Xu Jun251159 24.62
197 Aseev, Konstantin N251155 26.53
198 Grigorian, Karen A251167 39.65
199 Groszpeter, Attila251154 26.89
200 Guseinov, Aidyn251063 35.33
201 Antunes, Antonio250967 25.23
202 Dautov, Rustem250962 21.42
203 Veingold, Aleksander250875 33.55
204 Lein, Anatoly250853 56.09
205 Vogt, Lothar H250853 35.29
206 Gomez Baillo, Jorge H250869 28.03
207 Schneider, Lars Ake250858
208 Nikolac, Juraj250765 55.02
209 Todorcevic, Miodrag250769 46.47
210 Loginov, Valery A250558 31.38
211 Unzicker, Wolfgang250557 61.84
212 Birnboim, Nathan250554 36.43
213 Govedarica, Radovan250461 39.21
214 Matulovic, Milan250460 51.89
215 Mokrý, Karel250449 28.23
216 Ivanovic, Božidar250354 40.68
217 Cebalo, Mišo250350 42.23
218 Ghinda, Mihail Viorel250357 37.76
219 Hodgson, Julian M250251 23.76
220 Klovans, Janis250159 52.06
221 Ivkov, Borislav250153 53.47
222 Vitolinš, Alvis249962 40.87
223 Cifuentes Parada, Roberto249965 29.36
224 Meduna, Eduard249851 36.64
225 Tisdall, Jonathan D249857 28.68
226 Abramovic, Boško249753 36.21
227 Tringov, Georgy P249658 50.15
228 Kremenetsky, Anatoly M249573 48.29
229 Lalic, Bogdan249559 23.14
230 Basin, Leonid249463 29.44
231 Ree, Hans249454 42.62
232 Georgadze, Tamaz V249355 39.47
233 Fernandez Garcia, Jose Luis249358 32.98
234 Raicevic, Momcilo249263
235 Wilder, Michael249254 24.62
236 Mednis, Edmar J249162 50.11
237 Illescas Cordoba, Miguel249156 21.41
238 Plaskett, Jim249151 27.12
239 Shamkovich, Leonid A249158 63.91
240 deFirmian, Nicholas E249150 29.76
241 Kolarov, Atanas S249171 53.16
242 Georgiev, Krum249052 28.93
243 Van der Sterren, Paul249051 31.12
244 Kuporosov, Viktor249071 25.59
245 Stohl, Igor248951 22.59
246 Dizdar, Goran248855 28.40
247 Joksic, Sinisa248873 46.55
248 Yrjola, Jouni248852 27.52
249 Rukavina, Josip248857 44.42
250 Pytel, Krzysztof248863 41.95
251 Soppe, Guillermo248869 26.62
252 Gofshtein, Leonid D248870 34.03
253 Gurevich, Dmitry248751 30.64
254 Hellers, Ferdinand248753 18.26
255 Ernst, Thomas248752 26.70
256 Kalinitschew, Sergey248766 31.24
257 Jansa, Vlastimil248750 44.43
258 Lanka, Zigurds248760 26.94
259 Hebden, Mark248755 29.21
260 Sokolov, Ivan248557 18.88
261 Staniszewski, Piotr248554 20.65
262 Flear, Glenn C248550 28.22
263 Vukic, Milan248565 43.70
264 Rodriguez, Amador248452 30.64
265 Mnatsakanian, Eduard A248463 48.40
266 Seret, Jean Luc248461
267 Plachetka, Jan248451 42.20
268 Simic, Radoslav248463 38.89
269 Barbero, Gerardo F248359 25.69
270 Moskalenko, Viktor248372 26.40
271 Bischoff, Klaus248152 25.89
272 Petrushin, Alexander I248166 40.14
273 Donchev, Dimitar I248154 28.78
274 Franco Ocampos, Zenon248074 30.96
275 Reyes, Juan248065 24.01
276 Kogan, Boris248056
277 Filipenko, Alexander V248076 38.15
278 Pfleger, Helmut248059 43.73
279 Drasko, Milan247953 24.40
280 Nikolic, Zivoslav247856 33.38
281 Khasin, Alexander247864 36.00
282 Vera, Reynaldo247856 26.31
283 Wirthensohn, Heinz247860 35.98
284 Hawelko, Marek247752 27.72
285 Bukal, Vladimir Sr247760 47.50
286 Klaric, Zlatko247764 30.52
287 Ziatdinov, Raset247673 28.34
288 Gutman, Lev247650 41.59
289 Gurgenidze, Bukhuti I247655 53.46
290 Schussler, Harry247653 29.85
291 Hickl, Joerg247555 22.04
292 Vaulin, Alexander247469 30.12
293 Lechtynsky, Jiri247352 39.43
294 Řgaard, Leif247257 35.32
295 Portisch, Ferenc247262 48.06
296 Espig, Lutz247255 38.32
297 Legky, Nikolay A247169 32.05
298 Rajkovic, Dusan247158 44.87
299 Pekarek, Ales247151 25.37
300 Piket, Jeroen247055 18.26
301 Szekely, Peter247056 32.23
302 Kirov Ivanov, Nino247055 41.64
303 Lukin, Andrei M246963 38.67
304 Popchev, Milko246856 22.47
305 Popov, Luben246867 51.26
306 Tatai, Stefano246857 49.10
307 Zaitsev, Igor A246873 48.92
308 Winants, Luc246755 24.33
309 Szabó, László246670 70.11
310 Ermenkov, Evgenij246654 37.59
311 Helmers, Knut J246662 30.23
312 Hecht, Hans-Joachim246664 48.25
313 Tischbierek, Raj246652 24.60
314 Klundt, Klaus246670 45.35
315 Ionescu, Constantin246557 28.63
316 Spassov, Liuben246555 44.11
317 Lanc, Alois246453 39.20
318 Wolf, Volker246464 29.65
319 Ostojic, Predrag246272 49.19
320 Filipovic, Branko246160 29.57
321 Reeh, Oliver246161 23.28
322 Lombardy, William J246058 49.40
323 Janovsky, Sergey246076 27.20
324 Cramling, Dan245960 28.23
325 Stoica, Valentin245969 37.21
326 Li Zunian245958 29.31
327 Sahovic, Dragutin245962 46.73
328 Rivas Pastor, Manuel245856 26.80
329 Knezevic, Milorad245751 50.50
330 Marangunic, Srdjan245766 43.50
331 Efimov, Igor245766 26.62
332 Eslon, Jaan245763 35.15
333 Veinger, Itzhak245757 48.82
334 Haik, Aldo245751 34.53
335 Ricardi, Pablo245659 25.18
336 Tseitlin, Mikhail S245664 39.87
337 Tempone, Marcelo245673 24.65
338 Forintos, Gyözö V245563 51.75
339 Sideif Sade, Fikret I245558 35.33
340 Horvath, Jozsef245554 22.71
341 Pachmann, Ludek245475 62.96
342 Karpman, Vadim245469 21.96
343 Shirov, Alexei245473 14.82
344 Kolev, Atanas245465 19.79
345 Yap, Andronico245357
346 Pedersen, Erik245262 28.64
347 Hjorth, Greg245267 23.79
348 Fokin, Sergey245270 31.54
349 Peters, John A245275 36.22
350 Murshed, Niaz245160 20.96
351 Suetin, Alexey S245161 60.46
352 Schmidt, Wlodzimierz245049 44.05
353 Hermann, Manfred245067 44.66
354 Sigurjónsson, Gudmundur244955 39.60
355 Velickovic, Sasa244973 36.08
356 Marin, Mihail244963 22.03
357 Ardiansyah, Haji244959 35.40
358 Thorhallsson, Throstur244861 18.11
359 Rakic, Tomislav244866 52.47
360 Ornstein, Axel244755 35.02
361 Renman, Nils Gustaf244760
362 Hartston, William R244773 39.72
363 Foisor, Ovidiu244755 28.07
364 Bilek, István244772 54.72
365 Vokác, Marek244556 28.40
366 Bany, Jerzy244554 26.15
367 Shtyrenkov, Veniamen244567 29.02
368 Nun, Josef244575 53.77
369 Matlak, Marek244555 21.11
370 McNab, Colin Anderson244560 26.24
371 Kosten, Anthony C244559 28.77
372 Polgar, Zsuzsa244451 18.03
373 Gauglitz, Gernot244461 24.84
374 Giorgadze, Giorgi244367 22.55
375 Womacka, Mathias244374 20.84
376 Frias, Victor J244370 31.22
377 Sharif, Mershad244358 34.80
378 Thorsteins, Karl244357 22.55
379 Talavera, JC.244369
380 Klinger, Josef244351 19.90
381 Nun, Jiri244362 29.76
382 Rachels, Stuart244363 17.59
383 Valkesalmi, Kimmo244255 25.99
384 Gruenberg, Hans Ulrich244256 31.31
385 Kurtenkov, Atanas244263 23.74
386 Ambroz, Jan244163 32.87
387 Barczay, Laszlo244163 51.19
388 Braga, Fernando244160 28.81
389 King, Daniel J244052 23.67
390 Semkov, Semko244058 27.17
391 Lalev, Dimitar244068 27.29
392 Wockenfuss, Klaus243957 35.67
393 Krasenkow, Michal243967 23.46
394 Lengyel, Levente243864 53.88
395 Hertneck, Gerald243755 23.62
396 Kraidman, Yair243764 54.50
397 Mortensen, Erling243754 32.07
398 Jakobsen, Ole243760 44.53
399 Ye Jiangchuan243763 26.44
400 Renet, Olivier243752 22.36
401 Akesson, Ralf243657 26.23
402 Martinovic, Slobodan243656 41.76
403 Radulov, Ivan243655 48.31
404 Sznapik, Aleksander243651 36.22
405 Bielczyk, Jacek243556 34.19
406 Benko, Pal C243563 58.79
407 Rodriguez Vargas, Orestes243561 43.82
408 Akhmilovskaya, Elena243561
409 Paulsen, Dirk243466 28.26
410 Spiridonov, Nikola243454 49.17
411 Thipsay, Praveen Mahadeo243357 27.72
412 Wittmann, Walter243356 39.13
413 Hernandez, Roman243358 37.44
414 Kelecevic, Nedeljko243275 40.14
415 Kouatly, Bachar243251 29.16
416 Potts, Alan243269
417 Lazic, Miroljub243173 20.84
418 Kallai, Gabor243157 28.19
419 Sarwinski, Miroslaw243060 33.29
420 Rodriguez, Ruben243070 40.40
421 Rohde, Michael A243055 27.68
422 Schneider, Attila242958 32.04
423 Heinbuch, Detlef242959 26.31
424 Santo Roman, Marc242869 26.63
425 Robatsch, Karl242855 58.54
426 Kveinys, Aloyzas242871 24.81
427 Casper, Thomas242858 28.12
428 Kamsky, Gata242873 12.91
429 Handoko, Edhi242760 26.67
430 Ghitescu, Theodor242773 53.27
431 Solozhenkin, Evgeniy242769 20.75
432 Rigo, Janos242762 38.51
433 Motwani, Paul242762 24.88
434 Sherzer, Alex242767 16.25
435 Sendera, Jaroslaw242669 22.01
436 Temirbaev, Serik242660
437 Qi Jingxuan242659 39.47
438 Wolff, Patrick G242659 19.21
439 Sanna, Gianlazzaro242572 27.05
440 Milos, Gilberto242559 23.50
441 Kuligowski, Adam242455 31.35
442 Cabrilo, Goran242369 28.83
443 Garcia Martinez, Silvino242356 42.82
444 Mariotti, Sergio242363 40.72
445 Garcia, Gildardo242361 33.14
446 Szmetan, Jorge242275 36.92
447 Vilela, Jose Luis242256 34.11
448 Borm, Franciscus WM242170
449 Ulibin, Mikhail242164 15.91
450 Hug, Werner242156 34.64
451 Bisguier, Arthur B242163 57.56
452 Sygulski, Artur242151 26.77
453 Jasnikowski, Zbigniew242055 31.96
454 McCambridge, Vincent242062 27.14
455 Doncevic, Dario242063 29.30
456 Bastian, Herbert241962 34.39
457 Kuczynski, Robert241953 21.04
458 Blatny, Pavel241954 18.86
459 Blees, Albert241960 24.68
460 Bohm, Hans241964 37.29
461 Ligterink, Gert241958 37.45
462 Zahariev, Zahari241973 25.64
463 Condie, Mark L241956 22.22
464 Ochoa de Echaguen, F Javier241961 32.65
465 Schulte, Oliver241965 18.36
466 De Wit, Johannes S241968 22.59
467 Pelts, Roman241871 50.14
468 Ost Hansen, Jacob241868
469 Filipowicz, Andrzej241860 48.96
470 Wiedenkeller, Michael241752 24.30
471 Raicevic, Vladimir241758 37.99
472 Mainka, Romuald241768 23.95
473 Pribyl, Josef241759 39.55
474 Sonntag, Hans Hubert241668
475 Kristiansen, Jens241654 34.92
476 Gallagher, Joseph G241664 22.98
477 Onat, Ilhan241574 57.40
478 Trapl, Jindrich241564 45.10
479 Toshkov, Tihomir241561 27.44
480 Schulz, Klaus Juergen241557
481 Schweber, Samuel241575 50.79
482 Soltis, Andrew E241562 39.92
483 Gruenenwald, Joerg241471 21.90
484 Hawksworth, John C241470 23.40
485 Luczak, Andrzej241468 38.40
486 Sehner, Norbert241457 27.23
487 Ilic, Zoran241474 23.74
488 Grivas, Efstratios241365 21.08
489 Danailov, Silvio241356 26.03
490 Mascarinas, Rico241370 34.16
491 Jailjan, M.241374
492 Djuric, Stefan241253 31.76
493 Damjanovic, Mato241264 60.10
494 Imanaliev, Taalaibek241269
495 Paehtz, Thomas Sr241255 30.65
496 Shvidler, Eliahu241256 27.36
497 Saeed, Saeed Ahmed241267
498 Prandstetter, Eduard241151 38.37
499 Horvath, Tamas241158 35.52
500 Hartmann, Wolfram241073 30.93

These ratings, calculated as of April 30, 1987, incorporate all games (against rated opponents) played in the time between May 1, 1986 and April 30, 1987, along with the ratings that were already calculated as of April 30, 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 April 30, 1987. This represents the player's estimated strength on May 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 May 1, 1987. The +/- value represents the standard deviation of that estimate; the player's true strength on May 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 May 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 April 30, 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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