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Top 10 active players as of April 30, 1986


Top 500 active players as of April 30, 1986

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28185058.8% #223.05
2 Karpov, Anatoly E27894929.7% #334.93
3 Khalifman, Alexander2704542.3% #2420.28
4 Korchnoi, Viktor L2699481.3% #2555.10
5 Jussupow, Artur M2695511.2% #2826.21
6 Timman, Jan H2690470.6% #2934.38
7 Beliavsky, Alexander G2677500.4% #3732.37
8 Hübner, Robert2677500.5% #3837.48
9 Tal, Mikhail2676490.4% #3949.47
10 Vaganian, Rafael A2673490.3% #4134.54
11 Portisch, Lajos2672480.3% #4149.07
12 Eingorn, Viacheslav S2669500.3% #4429.43
13 Sokolov, Andrey Y2664500.2% #4823.11
14 Psakhis, Lev B2661490.2% #5027.42
15 Ljubojevic, Ljubomir2658490.2% #5235.49
16 Lerner, Konstantin Z2657500.2% #5336.17
17 Tukmakov, Vladimir B2652510.2% #5840.12
18 Dolmatov, Sergey V2652510.2% #6027.19
19 Dorfman, Iosif D2651560.3% #6433.99
20 Polugaevsky, Lev A2650500.1% #5951.44
21 Ribli, Zoltán2649490.1% #5934.65
22 Agzamov, Georgy T2648510.1% #6231.65
23 Malaniuk, Vladimir P2648510.1% #6328.78
24 Spassky, Boris V2648480.1% #6149.25
25 Miles, Anthony J2648470.1% #6131.02
26 Andersson, Ulf2643490.1% #6534.84
27 Dokhoian, Yury2642560.1% #7121.51
28 Short, Nigel D263948 #6920.91
29 Vasiukov, Evgeny A2639620.3% #7953.15
30 Nunn, John D M263848 #7031.01
31 Chernin, Alexander M263450 #7626.15
32 Sveshnikov, Evgeny E263251 #7836.22
33 Nikolic, Predrag262850 #8125.64
34 Bareev, Evgeny2627550.1% #8619.44
35 Romanishin, Oleg M262649 #8234.30
36 Gurevich, Mikhail N262552 #8527.19
37 Gulko, Boris F262551 #8639.22
38 Lputian, Smbat G262449 #8528.21
39 Bronstein, David I2622730.4% #10362.20
40 Seirawan, Yasser262249 #8726.10
41 Torre, Eugenio262151 #8934.49
42 Novikov, Igor A262151 #8923.93
43 Vyzmanavin, Alexey2620550.1% #9326.33
44 Gavrikov, Victor N261650 #9328.75
45 Larsen, Bent261451 #9651.15
46 Dvoiris, Semen I261353 #9927.49
47 Rozentalis, Eduardas261255 #10122.92
48 Chandler, Murray G261149 #9826.07
49 Razuvaev, Yury S261150 #9940.55
50 Balashov, Yury S260949 #10037.13
51 Smagin, Sergey260950 #10127.64
52 Ehlvest, Jaan260854 #10523.54
53 Makarichev, Sergey Y260755 #10632.45
54 Pintér, József260451 #10732.47
55 Christiansen, Larry M260251 #10929.84
56 Smyslov, Vassily V260251 #11065.10
57 Salov, Valery B260055 #11321.92
58 Suba, Mihai260050 #11138.91
59 Naumkin, Igor2599730.2% #12820.72
60 Kharitonov, Andrey Y259955 #11527.07
61 Tseshkovsky, Vitaly V259750 #11341.60
62 Ubilava, Elizbar E259751 #11535.68
63 Kavalek, Lubomir259652 #11642.72
64 Yudasin, Leonid G259651 #11526.73
65 Zaichik, Gennady L259453 #11929.22
66 Geller, Efim P259451 #11861.16
67 Adorján, András259449 #11636.08
68 Agdestein, Simen259451 #11818.95
69 Sax, Gyula259449 #11734.87
70 Arkhipov, Sergey259256 #12331.85
71 Dzindzichashvili, Roman Y259255 #12241.98
72 Yurtaev, Leonid259056 #12626.99
73 Kuzmin, Gennady P258953 #12540.28
74 Sosonko, Gennadi258950 #12342.94
75 Mikhalchishin, Adrian B258951 #12331.45
76 Ftácnik, Lubomír258649 #12528.50
77 Smejkal, Jan258650 #12540.11
78 Panchenko, Alexander N258552 #12832.57
79 Darga, Klaus V2583730.1% #14452.18
80 Gipslis, Aivars258261 #13649.23
81 Chekhov, Valery A258150 #13130.43
82 van der Wiel, John T H258149 #13026.72
83 Yermolinsky, Alex V258155 #13428.05
84 Azmaiparashvili, Zurab A258052 #13226.12
85 Gheorghiu, Florin258051 #13242.07
86 Parma, Bruno257965 #14344.33
87 Podgaets, Mikhail Y257957 #13738.77
88 Hort, Vlastimil257949 #13342.30
89 Smirin, Ilia257867 #14518.28
90 Speelman, Jonathan S257749 #13329.58
91 Neverov, Valery257660 #14221.86
92 Olafsson, Helgi257551 #13729.71
93 Panno, Oscar R257562 #14551.12
94 Bagirov, Vladimir K257455 #14049.71
95 Popovic, Petar257450 #13727.21
96 Kochiev, Alexander257254 #14230.10
97 Petrosian, Arshak B257253 #14132.37
98 Tarjan, James E257259 #14634.19
99 Marjanovic, Slavoljub257150 #14031.32
100 Eolian, Levon S257169 #15226.62
101 Shneider, Aleksandr257158 23.93
102 Pigusov, Evgeny257052 25.08
103 Rashkovsky, Nukhim N257051 40.03
104 Georgiev, Kiril256950 20.42
105 Vaisser, Anatoli256850 37.15
106 Nogueiras, Jesus256751 26.79
107 Gorelov, Sergey G256754 28.70
108 Chiburdanidze, Maia G256653 25.29
109 Timoshchenko, Gennady256461 37.01
110 Alburt, Lev O256451 40.69
111 Kengis, Edvins256253 27.05
112 Ivanov, Igor V256158 39.31
113 Oll, Lembit256154 20.02
114 Anikaev, Yury256069 37.84
115 Cámpora, Daniel H255854 28.83
116 Byrne, Robert E255858 58.03
117 Hulak, Krunoslav255553 34.92
118 Didishko, Vereslav255569 37.05
119 Vorotnikov, Vladislav V255459 38.70
120 Wedberg, Tom255457 32.43
121 Quinteros, Miguel A255350 38.34
122 Knaak, Rainer F255349 33.12
123 Najdorf, Miguel255268 76.04
124 Yakovich, Yuri255254 23.42
125 Savon, Vladimir A255268 45.59
126 Graf, Alexander255163 23.68
127 Glek, Igor V255156 24.48
128 Hansen, Curt255049 21.62
129 Polovodin, Igor A255072 31.10
130 Gufeld, Eduard E254964 50.11
131 Korzubov, Peter254960 24.33
132 Kupreichik, Viktor D254850 36.82
133 Gurgenidze, Bukhuti I254855 52.46
134 Uhlmann, Wolfgang254750 51.09
135 Matanovic, Aleksandar254667 55.93
136 Gligoric, Svetozar254652 63.24
137 Faragó, Iván254649 40.08
138 Benjamin, Joel L254552 22.14
139 Kurajica, Bojan254452 38.46
140 Velimirovic, Dragoljub254452 43.96
141 Browne, Walter S254351 37.30
142 Guseinov, Aidyn254268 34.33
143 Huzman, Alexander254269 24.05
144 London, Dimitri254164 23.44
145 Mokrý, Karel254149 27.23
146 Vladimirov, Evgeny Y254071 29.28
147 Csom, István254051 45.91
148 Karlsson, Lars254051 30.80
149 Henley, Ron W253857 29.40
150 Taimanov, Mark E253756 60.23
151 Kholmov, Ratmir D253653 60.96
152 Dueball, Juergen253571 41.09
153 Zapata, Alonso253551 27.69
154 Matulovic, Milan253559 50.89
155 Ostermeyer, Peter253458 42.55
156 Hazai, Laszlo253454 32.88
157 Ivkov, Borislav253452 52.47
158 Spraggett, Kevin B253251 31.47
159 Ekstroem, Roland253269 29.93
160 Reshevsky, Samuel H253264 74.43
161 Lobron, Eric253249 25.97
162 Sturua, Zurab253259 26.89
163 Jansa, Vlastimil253149 43.43
164 Barua, Dibyendu253158 19.51
165 Palatnik, Semen A252857 36.09
166 Kovacevic, Vladimir252753 44.09
167 Cherepkov, Alexander V252768 65.50
168 Liberzon, Vladimir M252775 49.10
169 Kruppa, Yuri252767 21.86
170 Anand, Viswanathan252760 16.39
171 Mestel, A Jonathan252653 29.13
172 Garcia Palermo, Carlos252651 32.41
173 Kindermann, Stefan252449 26.34
174 García Gonzáles, Guillermo252452 32.39
175 Ivanov, Alexander V252457 29.99
176 Sunye Neto, Jaime252453 28.99
177 Flear, Glenn C252354 27.22
178 Pétursson, Margeir252150 26.21
179 Yuferov, Sergey N252069 40.41
180 Vitolinš, Alvis252061 39.87
181 Gaprindashvili, Nona252064 44.98
182 Fernandez Garcia, Jose Luis251860 31.98
183 Meduna, Eduard251852 35.64
184 Drasko, Milan251853 23.40
185 Morovic Fernández, Iván E251756 23.10
186 Rukavina, Josip251754 43.42
187 Georgadze, Tamaz V251654 38.47
188 Arnason, Jon L251651 25.46
189 Kogan, Boris251557
190 Fedorowicz, John P251551 27.59
191 Bischoff, Klaus251452 24.89
192 Dlugy, Maxim251351 20.25
193 Grigorian, Karen A251360 38.65
194 Unzicker, Wolfgang251257 60.84
195 Groszpeter, Attila251251 25.89
196 Bönsch, Uwe251150 27.54
197 Nemet, Ivan251173 43.04
198 Veingold, Aleksander251166 32.55
199 Keene, Raymond251068
200 Velikov, Petar251052 35.08
201 Cebalo, Mišo250950 41.23
202 Greenfeld, Alon250955 22.04
203 Klovans, Janis250759 51.06
204 deFirmian, Nicholas E250650 28.76
205 Goldin, Alexander250665 21.18
206 Murey, Yakov250657 44.74
207 Vogt, Lothar H250651 34.29
208 Barlov, Dragan250451 29.25
209 Ivanovic, Božidar250351 39.68
210 Barbero, Gerardo F250357 24.69
211 Kraidman, Yair250369 53.50
212 Rogers, Ian250351 25.85
213 Gruenfeld, Yehuda250254 30.17
214 Inkiov, Ventzislav250249 29.94
215 Franco Ocampos, Zenon250171 29.96
216 Gomez Baillo, Jorge H250164 27.03
217 Hawelko, Marek250156 26.72
218 Kuporosov, Viktor250063 24.59
219 Haik, Aldo249953 33.53
220 Hjartarson, Jóhann249949 23.23
221 Wolf, Volker249864 28.65
222 Lukin, Andrei M249760 37.67
223 Basin, Leonid249657 28.44
224 Shamkovich, Leonid A249659 62.91
225 Suetin, Alexey S249670 59.46
226 Nikolic, Zivoslav249658 32.38
227 Rodriguez, Amador249652 29.64
228 Simic, Radoslav249558 37.89
229 Olafsson, Fridrik249574 51.26
230 Ziatdinov, Raset249466 27.34
231 Dreev, Alexey249462 17.28
232 Lukacs, Peter249350 35.81
233 Kuzmin, Alexey249369 23.14
234 Lein, Anatoly249253 55.09
235 Moskalenko, Viktor249264 25.40
236 Mednis, Edmar J249162 49.11
237 Yrjola, Jouni249152 26.52
238 Ghinda, Mihail Viorel249154 36.76
239 Georgiev, Krum249152 27.93
240 Kovacevic, Vladimir2249068 31.12
241 Pytel, Krzysztof249056 40.95
242 Kirov Ivanov, Nino249052 40.64
243 Gofshtein, Leonid D249062 33.03
244 Podzielny, Karl Heinz248867 31.64
245 Cvitan, Ognjen248852 24.55
246 Stohl, Igor248850 21.59
247 Plachetka, Jan248750 41.20
248 Schmidt, Wlodzimierz248750 43.05
249 Radulov, Ivan248755 47.31
250 Vukic, Milan248759 42.70
251 Mnatsakanian, Eduard A248657 47.40
252 Minic, Dragoljub248672 49.15
253 Birnboim, Nathan248664 35.43
254 Vaulin, Alexander248569 29.12
255 Schussler, Harry248552 28.85
256 Pekarek, Ales248562 24.37
257 McKay, Roderick M248575 34.22
258 Buturin, Vladimir248474 42.45
259 Abramovic, Boško248452 35.21
260 Rivas Pastor, Manuel248456 25.80
261 Staniszewski, Piotr248455 19.65
262 Lombardy, William J248456 48.40
263 Tatai, Stefano248354 48.10
264 Petrushin, Alexander I248359 39.14
265 Raicevic, Momcilo248362
266 Plaskett, Jim248349 26.12
267 Antunes, Antonio248267 24.23
268 Kaidanov, Gregory S248257 26.55
269 Tringov, Georgy P248154 49.15
270 Shabanov, Yury F248164 48.47
271 Soppe, Guillermo248071 25.62
272 Ionov, Sergey247974 24.31
273 Wirthensohn, Heinz247957 34.98
274 Klaric, Zlatko247958 29.52
275 Epishin, Vladimir247860 20.80
276 Van der Sterren, Paul247851 30.12
277 Hodgson, Julian M247852 22.76
278 Popov, Luben247762 50.26
279 Stoica, Valentin247664 36.21
280 Donchev, Dimitar I247650 27.78
281 Ernst, Thomas247657 25.70
282 Ree, Hans247652 41.62
283 Dizdar, Goran247554 27.40
284 Řgaard, Leif247562 34.32
285 Kudrin, Sergey247550 26.65
286 Hebden, Mark247554 28.21
287 Khasin, Alexander247561 35.00
288 Filipovic, Branko247463 28.57
289 Espig, Lutz247455 37.32
290 Portisch, Ferenc247456 47.06
291 Petrienko, Vladimir247467 31.14
292 Ivanchuk, Vassily247461 17.12
293 Vera, Reynaldo247353 25.31
294 Seret, Jean Luc247364
295 Rajkovic, Dusan247362 43.87
296 Szekely, Peter247351 31.23
297 Nikolac, Juraj247265 54.02
298 Heinbuch, Detlef247258 25.31
299 Pfleger, Helmut247255 42.73
300 Barbulescu, Dan247165 21.85
301 Zaitsev, Igor A247064 47.92
302 Tisdall, Jonathan D246958 27.68
303 Schneider, Lars Ake246860
304 Aseev, Konstantin N246856 25.53
305 Helmers, Knut J246856 29.23
306 Tashkhodzhaev, A.246868
307 Renman, Nils Gustaf246861
308 Sigurjónsson, Gudmundur246753 38.60
309 Govedarica, Radovan246769 38.21
310 Toth, Bela246758 43.03
311 Legky, Nikolay A246772 31.05
312 Van Wijgerden, Cornelis246668 35.93
313 Mirkovic, Slobodan246669 27.76
314 Hertneck, Gerald246458 22.62
315 Popchev, Milko246359 21.47
316 Hug, Werner246362 33.64
317 Benko, Pal C246265 57.79
318 Hermann, Manfred246166 43.66
319 Ligterink, Gert246155 36.45
320 Efimov, Igor246168 25.62
321 Sahovic, Dragutin246156 45.73
322 Giorgadze, Giorgi246171 21.55
323 Braga, Fernando246158 27.81
324 Andres Mendez, Miguel246170
325 Spassov, Liuben246052 43.11
326 Lau, Ralf246053 26.53
327 Prandstetter, Eduard246052 37.37
328 Shvidler, Eliahu245963 26.36
329 Hecht, Hans-Joachim245961 47.25
330 Gutman, Lev245951 40.59
331 Ornstein, Axel245856 34.02
332 Tseitlin, Mikhail S245858 38.87
333 Thorsteins, Karl245854 21.55
334 Knezevic, Milorad245850 49.50
335 Forintos, Gyözö V245857 50.75
336 Ardiansyah, Haji245763 34.40
337 Bielczyk, Jacek245755 33.19
338 Bastian, Herbert245758 33.39
339 Lalev, Dimitar245765 26.29
340 Pachmann, Ludek245766 61.96
341 Lechtynsky, Jiri245751 38.43
342 Yap, Andronico245552
343 Qi Jingxuan245556 38.47
344 Bany, Jerzy245554 25.15
345 Botterill, George Steven245571
346 Soltis, Andrew E245462 38.92
347 Calvo Minguez, Ricardo245473 42.52
348 Peters, John A245466 35.22
349 Bjelajac, Milan245471 38.13
350 Schneider, Attila245357 31.04
351 Womacka, Mathias245366 19.84
352 Lalic, Bogdan245260 22.14
353 Serper, Grigory245276 16.63
354 Sygulski, Artur245252 25.77
355 Velickovic, Sasa245265 35.08
356 Kurtenkov, Atanas245157 22.74
357 Barczay, Laszlo245162 50.19
358 Cifuentes Parada, Roberto245169 28.36
359 Lanc, Alois245054 38.20
360 Polgar, Zsuzsa245050 17.03
361 Hartston, William R244964 38.72
362 Bilek, István244964 53.72
363 Lanka, Zigurds244966 25.94
364 Loginov, Valery A244858 30.38
365 Foisor, Ovidiu244855 27.07
366 Horvath, Jozsef244854 21.71
367 Klinger, Josef244852 18.90
368 Thipsay, Praveen Mahadeo244853 26.72
369 Karner, Hillar244866 50.76
370 Eslon, Jaan244870 34.15
371 Enklaar, Bertus F244770
372 Nun, Josef244766 52.77
373 Strauss, David J244771 39.73
374 Bukal, Vladimir Sr244759 46.50
375 Li Zunian244756 28.31
376 Ricardi, Pablo244755 24.18
377 Gurevich, Dmitry244753 29.64
378 Frias, Victor J244562 30.22
379 Spiridonov, Nikola244551 48.17
380 Bisguier, Arthur B244572 56.56
381 Garcia, Gildardo244558 32.14
382 Handoko, Edhi244560 25.67
383 Hellers, Ferdinand244557 17.26
384 Mariotti, Sergio244465 39.72
385 Ambroz, Jan244457 31.87
386 Hjorth, Greg244465 22.79
387 Nun, Jiri244375 28.76
388 Ermenkov, Evgenij244351 36.59
389 Pelts, Roman244270 49.14
390 Murshed, Niaz244262 19.96
391 Klundt, Klaus244266 44.35
392 Vokác, Marek244259 27.40
393 Alexandria, Nana244275 36.55
394 Bass, Leonid244274 28.91
395 Gruenberg, Hans Ulrich244052 30.31
396 Lengyel, Levente244057 52.88
397 Adianto, Utut244062 21.12
398 Wilder, Michael244066 23.62
399 Tischbierek, Raj243952 23.60
400 Santo Roman, Marc243862 25.63
401 Kantsler, Boris243864 24.04
402 Valkesalmi, Kimmo243859 24.99
403 Dobrovolsky, Ladislav243866 35.35
404 Bellin, Robert243767 33.83
405 Derikum, Axel243772 31.96
406 De Wit, Johannes S243762 21.59
407 Veinger, Itzhak243770 47.82
408 Raicevic, Vladimir243757 36.99
409 Orlov, Georgi243669
410 Kelecevic, Nedeljko243673 39.14
411 Miralles, Gilles243657 20.23
412 Doda, Zbigniew243669 55.19
413 Sanna, Gianlazzaro243564 26.05
414 Mascarinas, Rico243571 33.16
415 Hernandez, Roman243553 36.44
416 Watson, William N243452 24.03
417 Leow Leslie M243372
418 Dzuban, Oleg I243374
419 Wiedenkeller, Michael243357 23.30
420 Kouatly, Bachar243352 28.16
421 Sideif Sade, Fikret I243363 34.33
422 Djuric, Stefan243252 30.76
423 Zagrebelny, Sergey243167
424 Sisniega, Marcel243157 26.76
425 Filipowicz, Andrzej243166 47.96
426 Kristiansen, Jens243151 33.92
427 Sznapik, Aleksander243050 35.22
428 Danailov, Silvio243054 25.03
429 Wittmann, Walter243058 38.13
430 Ghitescu, Theodor242965 52.27
431 Doncevic, Dario242959 28.30
432 McCambridge, Vincent242957 26.14
433 Gauglitz, Gernot242960 23.84
434 Zahariev, Zahari242964 24.64
435 Akesson, Ralf242861 25.23
436 Steinbacher, Matthias242866 34.62
437 Casper, Thomas242858 27.12
438 Van Riemsdijk, Herman C242769 37.68
439 Tiller, Bjorn242771 27.29
440 Reefschlaeger, Helmut242761 42.06
441 Robatsch, Karl242663 57.54
442 Szmetan, Jorge242669 35.92
443 Kishnev, Sergey242672 29.50
444 Manouck, Thierry242667 28.96
445 Cabrilo, Goran242661 27.83
446 Rigo, Janos242561 37.51
447 Pliester, Leon242560 31.69
448 Jakobsen, Ole242458 43.53
449 Vilela, Jose Luis242452 33.11
450 Ochoa de Echaguen, F Javier242470 31.65
451 Sharif, Mershad242466 33.80
452 Borm, Franciscus WM242462
453 Martinovic, Slobodan242353 40.76
454 Biriescu, Ioan242369 32.51
455 Garcia Martinez, Silvino242352 41.82
456 Jailjan, M.242366
457 Littlewood, Paul E242375 30.28
458 Imanaliev, Taalaibek242262
459 Adamski, Jan242252 42.47
460 Dizdarevic, Emir242259 28.08
461 Bohm, Hans242158 36.29
462 Saeed, Saeed Ahmed242160
463 Malevinsky, Alexander A242168 36.18
464 Karolyi, Tibor Jr242156 24.46
465 Ost Hansen, Jacob242160
466 Xu Jun242164 23.62
467 Barle, Janez242066 34.11
468 Hartmann, Wolfram242064 29.93
469 Pribyl, Josef241954 38.55
470 Kestler, Hans-Günter241970 46.38
471 Westerinen, Heikki MJ241852 42.01
472 Pedersen, Erik241861 27.64
473 Rubinetti, Jorge A241861 41.08
474 Cramling, Dan241769 27.23
475 Dejkalo, Stefan241754 26.54
476 Paulsen, Dirk241762 27.26
477 Bronstein, Luis241764 39.91
478 Seppeur, Reinhold241763 30.71
479 Schweber, Samuel241766 49.79
480 Hawksworth, John C241663 22.40
481 Arkell, Keith C241669 25.31
482 Ilic, Zoran241665 22.74
483 Damljanovic, Branko241561 24.87
484 Martin, Andrew D241560 28.94
485 Wockenfuss, Klaus241455 34.67
486 Semkov, Semko241457 26.17
487 Gruen, Peter241459 29.29
488 Janssen, Han241366 26.16
489 Gerusel, Mathias241373 48.23
490 Brinck Claussen, Bjorn241362
491 Matlak, Marek241362 20.11
492 McNab, Colin Anderson241261 25.24
493 Wahls, Matthias241266 18.26
494 Gruenenwald, Joerg241169 20.90
495 Damjanovic, Mato241175 59.10
496 Mortensen, Erling241152 31.07
497 Hartman, Christer241167 25.51
498 Zaltsman, Vitaly F241057 44.51
499 Condie, Mark L241060 21.22
500 Kolev, Atanas240970 18.79

These ratings, calculated as of April 30, 1986, incorporate all games (against rated opponents) played in the time between May 1, 1985 and April 30, 1986, along with the ratings that were already calculated as of April 30, 1985. 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, 1986. This represents the player's estimated strength on May 1, 1986.

+/- 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, 1986. The +/- value represents the standard deviation of that estimate; the player's true strength on May 1, 1986 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, 1986. 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, 1986. 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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