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Top 10 active players as of February 28, 1987


Top 500 active players as of February 28, 1987

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28274968.2% #223.87
2 Karpov, Anatoly E27834823.2% #435.76
3 Tal, Mikhail2705491.3% #2250.30
4 Jussupow, Artur M2697501.2% #2627.04
5 Khalifman, Alexander2682520.6% #3721.11
6 Psakhis, Lev B2681490.4% #3628.25
7 Beliavsky, Alexander G2675490.4% #4033.20
8 Timman, Jan H2675480.3% #4035.21
9 Tukmakov, Vladimir B2673510.4% #4240.95
10 Short, Nigel D2670480.2% #4221.74
11 Hübner, Robert2670490.3% #4438.31
12 Portisch, Lajos2668480.2% #4449.90
13 Korchnoi, Viktor L2664480.2% #4855.93
14 Seirawan, Yasser2663500.2% #5026.92
15 Sokolov, Andrey Y2661490.2% #5123.93
16 Ljubojevic, Ljubomir2660480.1% #5136.32
17 Polugaevsky, Lev A2658500.2% #5552.27
18 Ribli, Zoltán2655490.1% #5635.48
19 Lerner, Konstantin Z2651500.1% #6136.99
20 Vaganian, Rafael A2648500.1% #6235.37
21 Gulko, Boris F2648520.1% #6440.05
22 Gavrikov, Victor N2647520.1% #6529.58
23 Eingorn, Viacheslav S264550 #6630.26
24 Andersson, Ulf2644500.1% #6635.67
25 Sax, Gyula2642500.1% #6835.69
26 Gurevich, Mikhail N2639520.1% #7328.02
27 Spassky, Boris V263949 #7050.08
28 Vasiukov, Evgeny A2636630.2% #8353.97
29 Chernin, Alexander M263650 #7526.97
30 Lputian, Smbat G263449 #7629.04
31 Ehlvest, Jaan2634540.1% #7924.37
32 Salov, Valery B2631540.1% #8222.76
33 Miles, Anthony J263047 #7931.85
34 Malaniuk, Vladimir P262951 #8329.60
35 Nunn, John D M262649 #8331.84
36 Bareev, Evgeny262653 #8620.27
37 Ivanchuk, Vassily2626550.1% #8917.94
38 Pintér, József262551 #8633.30
39 Balashov, Yury S262450 #8737.95
40 Dolmatov, Sergey V262451 #8828.02
41 Torre, Eugenio262354 #9035.32
42 Vyzmanavin, Alexey262253 #9127.16
43 Nikolic, Predrag262252 #9126.46
44 Vladimirov, Evgeny Y2620570.1% #9730.11
45 Speelman, Jonathan S261649 #9430.40
46 Romanishin, Oleg M261649 #9335.13
47 Chandler, Murray G261548 #9526.90
48 Kuzmin, Gennady P261157 #10441.11
49 Gelfand, Boris2611630.1% #10918.68
50 Dorfman, Iosif D260955 #10634.82
51 Larsen, Bent260851 #10451.98
52 Ubilava, Elizbar E260851 #10436.50
53 Hort, Vlastimil260749 #10443.13
54 Huzman, Alexander260754 #10724.88
55 Razuvaev, Yury S260750 #10541.38
56 Kharitonov, Andrey Y260654 #10827.90
57 Azmaiparashvili, Zurab A260451 #10926.94
58 Goldin, Alexander260355 #11222.00
59 Dokhoian, Yury260254 #11422.34
60 Sveshnikov, Evgeny E260151 #11137.05
61 Rashkovsky, Nukhim N260152 #11240.86
62 Dzindzichashvili, Roman Y260060 #11942.81
63 Agdestein, Simen259952 #11419.79
64 Smyslov, Vassily V259850 #11465.92
65 Christiansen, Larry M259852 #11530.67
66 Yurtaev, Leonid259759 #12027.82
67 Mikhalchishin, Adrian B259751 #11632.28
68 Kruppa, Yuri259657 #12022.69
69 Geller, Efim P259651 #11761.98
70 Yermolinsky, Alex V259655 #12028.88
71 Smirin, Ilia2595700.1% #13119.10
72 Hansen, Curt259450 #11922.44
73 Rozentalis, Eduardas259357 #12523.75
74 Tseshkovsky, Vitaly V259351 #12142.43
75 Smagin, Sergey259251 #12128.47
76 Dvoiris, Semen I259155 #12528.32
77 Zaichik, Gennady L259154 #12430.05
78 Novikov, Igor A259051 #12324.76
79 Naumkin, Igor2589720.1% #13921.55
80 Kengis, Edvins258954 #12727.88
81 Georgiev, Kiril258751 #12721.25
82 Makarichev, Sergey Y258755 #12933.28
83 Yudasin, Leonid G258650 #12727.55
84 Panchenko, Alexander N258555 #13133.40
85 Gipslis, Aivars2585690.1% #14150.05
86 van der Wiel, John T H258449 #12827.55
87 Kavalek, Lubomir258352 #13043.55
88 Nogueiras, Jesus258350 #13027.61
89 Panno, Oscar R258365 #14051.94
90 Podgaets, Mikhail Y258262 #13939.60
91 Parma, Bruno2581740.1% #14745.16
92 Glek, Igor V257960 #14125.31
93 Kupreichik, Viktor D257851 #13637.65
94 Cámpora, Daniel H257854 #13829.66
95 Adorján, András257750 #13636.91
96 Pigusov, Evgeny257751 #13725.91
97 Shneider, Aleksandr257662 #14524.77
98 Suba, Mihai257549 #13839.74
99 Gheorghiu, Florin257452 #14042.89
100 Tarjan, James E257466 #14935.02
101 Sosonko, Gennadi257251 43.78
102 Kochiev, Alexander257258 30.92
103 Gorelov, Sergey G257157 29.53
104 Knaak, Rainer F257050 33.94
105 Marjanovic, Slavoljub256951 32.14
106 Timoshchenko, Gennady256953 37.84
107 Chiburdanidze, Maia G256854 26.11
108 Graf, Alexander256758 24.51
109 Olafsson, Helgi256751 30.54
110 Alburt, Lev O256651 41.52
111 Gligoric, Svetozar256653 64.07
112 Dreev, Alexey256557 18.11
113 Ftácnik, Lubomír256449 29.33
114 Benjamin, Joel L256352 22.96
115 Lobron, Eric256150 26.81
116 Byrne, Robert E255964 58.86
117 Neverov, Valery255855 22.69
118 Gruenfeld, Yehuda255852 30.99
119 Petrosian, Arshak B255755 33.20
120 Bagirov, Vladimir K255556 50.53
121 Ivanov, Igor V255560 40.14
122 Kantsler, Boris255458 24.87
123 Yakovich, Yuri255351 24.25
124 Vorotnikov, Vladislav V255366 39.53
125 Kurajica, Bojan255254 39.29
126 Zapata, Alonso255050 28.52
127 Arnason, Jon L255051 26.29
128 Shabanov, Yury F255059 49.30
129 London, Dimitri255068 24.27
130 Popovic, Petar255051 28.04
131 Marin, Mihail255062 21.85
132 Reshevsky, Samuel H255064 75.26
133 Korzubov, Peter254966 25.16
134 Gufeld, Eduard E254959 50.94
135 Murey, Yakov254853 45.57
136 Faragó, Iván254749 40.91
137 Vaisser, Anatoli254653 37.97
138 Smejkal, Jan254649 40.93
139 Osnos, Viacheslav V254470 51.59
140 Fedorowicz, John P254450 28.42
141 Matulovic, Milan254464 51.72
142 Didishko, Vereslav254365 37.88
143 Cvitan, Ognjen254352 25.38
144 Arkhipov, Sergey254355 32.68
145 Uhlmann, Wolfgang254351 51.91
146 Hulak, Krunoslav254153 35.76
147 Quinteros, Miguel A254152 39.17
148 García Gonzáles, Guillermo254151 33.22
149 Taimanov, Mark E254062 61.06
150 Henley, Ron W253963 30.23
151 Garcia Palermo, Carlos253951 33.24
152 Kholmov, Ratmir D253857 61.79
153 Karlsson, Lars253851 31.63
154 Sturua, Zurab253766 27.72
155 Dueball, Juergen253675 41.91
156 Chekhov, Valery A253651 31.25
157 Rogers, Ian253650 26.68
158 Barua, Dibyendu253564 20.34
159 Oll, Lembit253554 20.85
160 Epishin, Vladimir253459 21.63
161 Morovic Fernández, Iván E253457 23.92
162 Kovacevic, Vladimir253356 44.92
163 Kuzmin, Alexey253262 23.97
164 Kaidanov, Gregory S253254 27.38
165 Hjartarson, Jóhann253250 24.05
166 Bönsch, Uwe253251 28.37
167 Ivanov, Alexander V253260 30.82
168 Kindermann, Stefan253149 27.17
169 Velikov, Petar252953 35.91
170 Palatnik, Semen A252863 36.92
171 Wedberg, Tom252759 33.26
172 Mestel, A Jonathan252651 29.95
173 Ivkov, Borislav252552 53.29
174 Sunye Neto, Jaime252451 29.82
175 Serper, Grigory252360 17.46
176 deFirmian, Nicholas E252150 29.59
177 Inkiov, Ventzislav252151 30.78
178 Groszpeter, Attila252053 26.72
179 Magerramov, Elmar S252063 28.88
180 Gaprindashvili, Nona251959 45.82
181 Aseev, Konstantin N251855 26.36
182 Barbulescu, Dan251757 22.68
183 Spraggett, Kevin B251752 32.30
184 Velimirovic, Dragoljub251751 44.79
185 Lau, Ralf251751 27.36
186 Cifuentes Parada, Roberto251465 29.19
187 Rukavina, Josip251458 44.25
188 Ostermeyer, Peter251458 43.38
189 Hazai, Laszlo251351 33.71
190 Dlugy, Maxim251350 21.08
191 Guseinov, Aidyn251363 35.16
192 Csom, István251151 46.74
193 Meduna, Eduard251151 36.46
194 Vogt, Lothar H251152 35.11
195 Pétursson, Margeir251150 27.04
196 Birnboim, Nathan251155 36.25
197 Loginov, Valery A250958 31.21
198 Unzicker, Wolfgang250957 61.67
199 Dautov, Rustem250962 21.25
200 Georgadze, Tamaz V250956 39.30
201 Hickl, Joerg250857 21.87
202 Mokrý, Karel250749 28.06
203 Illescas Cordoba, Miguel250758 21.23
204 Lukacs, Peter250750 36.64
205 Browne, Walter S250752 38.13
206 Anand, Viswanathan250761 17.21
207 Van der Sterren, Paul250752 30.94
208 Rodriguez, Amador250752 30.47
209 Lanka, Zigurds250660 26.77
210 Cebalo, Mišo250650 42.06
211 Greenfeld, Alon250654 22.86
212 Grigorian, Karen A250667 39.47
213 Nemet, Ivan250570 43.87
214 Raicevic, Momcilo250560
215 Jansa, Vlastimil250450 44.25
216 Tringov, Georgy P250458 49.97
217 Schneider, Lars Ake250359
218 Vitolinš, Alvis250362 40.70
219 Adianto, Utut250363 21.94
220 Barlov, Dragan250253 30.08
221 Lombardy, William J250259 49.23
222 Drasko, Milan250154 24.23
223 Kovacevic, Vladimir2250068 31.94
224 Tisdall, Jonathan D250057 28.51
225 Hodgson, Julian M249852 23.59
226 Ghinda, Mihail Viorel249856 37.59
227 Kolarov, Atanas S249871 52.98
228 Ree, Hans249754 42.45
229 Basin, Leonid249763 29.26
230 Ivanovic, Božidar249753 40.51
231 Flear, Glenn C249650 28.04
232 Gurevich, Dmitry249652 30.46
233 Kudrin, Sergey249650 27.47
234 Watson, William N249652 24.86
235 Fernandez Garcia, Jose Luis249661 32.82
236 Gomez Baillo, Jorge H249669 27.86
237 Mednis, Edmar J249562 49.93
238 Nikolac, Juraj249566 54.85
239 Vukic, Milan249562 43.53
240 Kuporosov, Viktor249471 25.42
241 Shamkovich, Leonid A249459 63.74
242 Antunes, Antonio249470 25.06
243 Seret, Jean Luc249362
244 Klovans, Janis249359 51.89
245 Franco Ocampos, Zenon249272 30.79
246 Bischoff, Klaus249253 25.72
247 Moskalenko, Viktor249273 26.23
248 Kogan, Boris249156
249 Abramovic, Boško249153 36.04
250 Stohl, Igor249052 22.42
251 Staniszewski, Piotr249056 20.48
252 Lalic, Bogdan249062 22.97
253 Georgiev, Krum249052 28.76
254 Ernst, Thomas248953 26.53
255 Soppe, Guillermo248970 26.45
256 Sokolov, Ivan248962 18.71
257 Plaskett, Jim248850 26.94
258 Pytel, Krzysztof248863 41.79
259 Kalinitschew, Sergey248766 31.07
260 Wilder, Michael248756 24.45
261 Hellers, Ferdinand248755 18.08
262 Barbero, Gerardo F248659 25.52
263 Mnatsakanian, Eduard A248663 48.23
264 Dizdar, Goran248556 28.23
265 Wolf, Volker248565 29.48
266 Yrjola, Jouni248553 27.34
267 Joksic, Sinisa248573 46.38
268 Petrushin, Alexander I248466 39.96
269 Pfleger, Helmut248359 43.56
270 Plachetka, Jan248351 42.03
271 Řgaard, Leif248356 35.15
272 Simic, Radoslav248361 38.72
273 Espig, Lutz248255 38.15
274 Vaulin, Alexander248271 29.94
275 Donchev, Dimitar I248154 28.60
276 Podzielny, Karl Heinz248172 32.47
277 Klundt, Klaus248071 45.18
278 Vera, Reynaldo247956 26.14
279 Gurgenidze, Bukhuti I247955 53.29
280 Wirthensohn, Heinz247959 35.82
281 Gofshtein, Leonid D247970 33.85
282 Sahovic, Dragutin247861 46.55
283 Winants, Luc247856 24.16
284 Ziatdinov, Raset247873 28.17
285 Lukin, Andrei M247863 38.50
286 Khasin, Alexander247765 35.83
287 Klaric, Zlatko247761 30.34
288 Lein, Anatoly247654 55.91
289 Kirov Ivanov, Nino247654 41.47
290 Helmers, Knut J247660 30.06
291 Legky, Nikolay A247569 31.88
292 Pekarek, Ales247452 25.20
293 Haik, Aldo247451 34.36
294 Schussler, Harry247453 29.68
295 Nikolic, Zivoslav247458 33.21
296 Popchev, Milko247356 22.30
297 Minic, Dragoljub247371 49.97
298 Ornstein, Axel247257 34.84
299 Gutman, Lev247250 41.42
300 Piket, Jeroen247256 18.09
301 Tatai, Stefano247157 48.93
302 Velickovic, Sasa247173 35.91
303 Popov, Luben247168 51.08
304 Lechtynsky, Jiri247152 39.26
305 Kremenetsky, Anatoly M247071 48.12
306 Spassov, Liuben247055 43.93
307 Tischbierek, Raj246952 24.43
308 Szabó, László246970 69.94
309 Ionescu, Constantin246858 28.46
310 Portisch, Ferenc246858 47.89
311 Ermenkov, Evgenij246853 37.41
312 Rivas Pastor, Manuel246855 26.62
313 Peters, John A246875 36.05
314 Matlak, Marek246858 20.93
315 Szekely, Peter246854 32.05
316 Hawelko, Marek246753 27.55
317 Soltis, Andrew E246667 39.75
318 Rajkovic, Dusan246663 44.70
319 Xu Jun246663 24.45
320 Janovsky, Sergey246476 27.03
321 Rakic, Tomislav246466 52.30
322 Hartston, William R246374 39.54
323 Valkesalmi, Kimmo246256 25.82
324 Zaitsev, Igor A246268 48.75
325 Stoica, Valentin246269 37.04
326 Schmidt, Wlodzimierz246149 43.88
327 Hecht, Hans-Joachim246164 48.08
328 Veinger, Itzhak246157 48.65
329 Eslon, Jaan246165 34.98
330 Tseitlin, Mikhail S246064 39.70
331 Sharif, Mershad246058 34.63
332 Hebden, Mark246056 29.04
333 Ricardi, Pablo245959 25.01
334 Murshed, Niaz245960 20.79
335 Bilek, István245971 54.55
336 Shvidler, Eliahu245958 27.19
337 Efimov, Igor245966 26.45
338 Karpman, Vadim245869 21.79
339 Sideif Sade, Fikret I245758 35.16
340 Benko, Pal C245768 58.62
341 Filipovic, Branko245764 29.39
342 Kosten, Anthony C245661 28.59
343 Kolev, Atanas245665 19.62
344 Shirov, Alexei245673 14.65
345 Horvath, Jozsef245555 22.54
346 Forintos, Gyözö V245459 51.58
347 Pedersen, Erik245462 28.46
348 Sigurjónsson, Gudmundur245355 39.43
349 Mirkovic, Slobodan245373 28.58
350 Lanc, Alois245353 39.03
351 King, Daniel J245352 23.50
352 Knezevic, Milorad245252 50.33
353 Frias, Victor J245066 31.05
354 Kurtenkov, Atanas245060 23.57
355 Ardiansyah, Haji245063 35.23
356 Suetin, Alexey S245061 60.28
357 Bany, Jerzy245058 25.98
358 Qi Jingxuan245063 39.30
359 Vokác, Marek245056 28.23
360 Hermann, Manfred244967 44.49
361 Pachmann, Ludek244874 62.80
362 Tempone, Marcelo244871 24.48
363 Akesson, Ralf244858 26.05
364 Blatny, Pavel244753 18.68
365 Gauglitz, Gernot244761 24.67
366 Renman, Nils Gustaf244660
367 Ambroz, Jan244663 32.69
368 Lalev, Dimitar244668 27.12
369 Karner, Hillar244675 51.59
370 Polgar, Zsuzsa244651 17.86
371 Ochoa de Echaguen, F Javier244564 32.48
372 Gruenberg, Hans Ulrich244555 31.14
373 Womacka, Mathias244574 20.67
374 Nun, Josef244574 53.60
375 Renet, Olivier244453 22.19
376 McNab, Colin Anderson244460 26.07
377 Braga, Fernando244460 28.64
378 Giorgadze, Giorgi244468 22.38
379 Thorhallsson, Throstur244462 17.94
380 Bukal, Vladimir Sr244463 47.32
381 Bisguier, Arthur B244370 57.39
382 Motwani, Paul244363 24.71
383 Schoen, Wolfram244373 19.73
384 Thipsay, Praveen Mahadeo244257 27.54
385 Martinovic, Slobodan244255 41.59
386 Barczay, Laszlo244263 51.02
387 Kraidman, Yair244263 54.32
388 Bielczyk, Jacek244155 34.01
389 Yap, Andronico244155
390 Lazic, Miroljub244173 20.67
391 Li Zunian244159 29.14
392 Thorsteins, Karl244157 22.37
393 Krasenkow, Michal244067 23.29
394 Wockenfuss, Klaus244057 35.50
395 Nun, Jiri243862 29.59
396 Radulov, Ivan243854 48.14
397 Heinbuch, Detlef243858 26.14
398 Sarwinski, Miroslaw243861 33.12
399 Akhmilovskaya, Elena243761
400 Wiedenkeller, Michael243753 24.13
401 Mortensen, Erling243653 31.90
402 Filipowicz, Andrzej243661 48.79
403 Kveinys, Aloyzas243671 24.64
404 Jakobsen, Ole243660 44.36
405 Wittmann, Walter243656 38.95
406 Shtyrenkov, Veniamen243669 28.85
407 Kouatly, Bachar243652 28.98
408 Blees, Albert243659 24.51
409 Rodriguez, Ruben243570 40.22
410 Santo Roman, Marc243569 26.46
411 Foisor, Ovidiu243555 27.89
412 Spiridonov, Nikola243554 48.99
413 Raicevic, Vladimir243459 37.82
414 Garcia, Gildardo243360 32.96
415 Imanaliev, Taalaibek243370
416 Hernandez, Roman243358 37.26
417 Fokin, Sergey243372 31.37
418 Klinger, Josef243251 19.73
419 Casper, Thomas243258 27.94
420 Lengyel, Levente243259 53.71
421 Sznapik, Aleksander243152 36.05
422 Temirbaev, Serik243161
423 Solozhenkin, Evgeniy243169 20.58
424 Schneider, Attila243156 31.87
425 Doncevic, Dario243163 29.13
426 Kallai, Gabor243057 28.02
427 Cramling, Dan243063 28.06
428 Handoko, Edhi243061 26.50
429 Kamsky, Gata242973 12.74
430 Hertneck, Gerald242954 23.44
431 Ghitescu, Theodor242973 53.09
432 Sendera, Jaroslaw242969 21.84
433 Sehner, Norbert242856 27.06
434 Cabrilo, Goran242866 28.66
435 Robatsch, Karl242759 58.37
436 Garcia Martinez, Silvino242655 42.65
437 Borm, Franciscus WM242670
438 Trapl, Jindrich242665 44.92
439 Luczak, Andrzej242668 38.23
440 Rigo, Janos242662 38.33
441 Potts, Alan242569
442 Szmetan, Jorge242573 36.76
443 Hawksworth, John C242471 23.23
444 Milos, Gilberto242458 23.33
445 Prandstetter, Eduard242452 38.20
446 Kuczynski, Robert242356 20.86
447 Hug, Werner242356 34.47
448 Pribyl, Josef242259 39.38
449 Schweber, Samuel242273 50.62
450 McCambridge, Vincent242160 26.97
451 Rubinetti, Jorge A242169 41.91
452 Karolyi, Tibor Jr242154 25.29
453 Bastian, Herbert242062 34.22
454 Kelecevic, Nedeljko242071 39.96
455 Djuric, Stefan242054 31.59
456 Sanna, Gianlazzaro242073 26.88
457 Paulsen, Dirk242068 28.09
458 Reeh, Oliver242063 23.11
459 Condie, Mark L242056 22.04
460 Danailov, Silvio241955 25.85
461 Ost Hansen, Jacob241968
462 Vilela, Jose Luis241956 33.94
463 Zahariev, Zahari241973 25.47
464 Ligterink, Gert241857 37.28
465 Davies, Nigel R241859 26.58
466 Pelts, Roman241870 49.96
467 Adamski, Jan241855 43.30
468 Kuligowski, Adam241758 31.18
469 Paehtz, Thomas Sr241754 30.48
470 Ulibin, Mikhail241765 15.74
471 Semkov, Semko241762 26.99
472 Horvath, Tamas241758 35.35
473 Bohm, Hans241763 37.12
474 Toshkov, Tihomir241761 27.27
475 Mariotti, Sergio241765 40.55
476 De Wit, Johannes S241668 22.42
477 Sygulski, Artur241652 26.60
478 Machulsky, Anatoly D241662 30.43
479 Atalik, Suat241673 22.38
480 Van Riemsdijk, Herman C241570 38.51
481 Gruenenwald, Joerg241571 21.73
482 Barle, Janez241572 34.93
483 Bronstein, Luis241567 40.74
484 Jasnikowski, Zbigniew241455 31.79
485 Jailjan, M.241474
486 Kristiansen, Jens241454 34.76
487 Damjanovic, Mato241364 59.93
488 Hoelzl, Franz241363 40.89
489 Saeed, Saeed Ahmed241267
490 Saltaev, Mihail241266 24.28
491 Scheeren, Peter241268 31.58
492 Meister, Peter241168 20.68
493 Pliester, Leon241159 32.52
494 Schulz, Klaus Juergen241058
495 Dizdarevic, Emir241056 28.90
496 Schulte, Oliver240865 18.19
497 Hjorth, Greg240866 23.62
498 Ilic, Zoran240873 23.57
499 Nickoloff, Bryon240866 30.68
500 Bonin, Jay R240864 31.64

These ratings, calculated as of February 28, 1987, incorporate all games (against rated opponents) played in the time between March 1, 1986 and February 28, 1987, along with the ratings that were already calculated as of February 28, 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 February 28, 1987. This represents the player's estimated strength on March 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 March 1, 1987. The +/- value represents the standard deviation of that estimate; the player's true strength on March 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 March 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 February 28, 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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