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Top 10 active players as of September 30, 1987

  #  

Player Rating +/-
1 Kasparov, Garry K284049
2 Karpov, Anatoly E276248
3 Timman, Jan H271247
4 Naumkin, Igor269559
5 Beliavsky, Alexander G269449
6 Jussupow, Artur M268449
7 Tal, Mikhail268348
8 Korchnoi, Viktor L267847
9 Vaganian, Rafael A267750
10 Gelfand, Boris267357

About these ratings

Top 500 active players as of September 30, 1987

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28404980.9% #124.46
2 Karpov, Anatoly E27624810.4% #636.35
3 Timman, Jan H2712471.5% #1735.79
4 Naumkin, Igor2695591.7% #2922.14
5 Beliavsky, Alexander G2694490.7% #2633.79
6 Jussupow, Artur M2684490.4% #3227.63
7 Tal, Mikhail2683480.3% #3250.89
8 Korchnoi, Viktor L2678470.3% #3456.52
9 Vaganian, Rafael A2677500.4% #3735.95
10 Gelfand, Boris2673570.6% #4319.27
11 Portisch, Lajos2671480.2% #4150.49
12 Salov, Valery B2669500.3% #4323.34
13 Short, Nigel D2663470.1% #4522.33
14 Ehlvest, Jaan2662510.2% #4824.95
15 Hübner, Robert2660480.1% #4738.90
16 Psakhis, Lev B2660480.1% #4828.84
17 Nikolic, Predrag2658490.1% #5027.05
18 Seirawan, Yasser2657490.1% #5127.52
19 Tukmakov, Vladimir B2656500.1% #5241.54
20 Ljubojevic, Ljubomir2654480.1% #5336.91
21 Khalifman, Alexander2651500.1% #5721.70
22 Sax, Gyula2649490.1% #5836.28
23 Ribli, Zoltán2647490.1% #5836.06
24 Andersson, Ulf264648 #5936.26
25 Balashov, Yury S2646500.1% #6138.55
26 Gurevich, Mikhail N2644490.1% #6228.61
27 Polugaevsky, Lev A2641500.1% #6552.86
28 Eingorn, Viacheslav S264150 #6530.85
29 Spassky, Boris V264049 #6650.67
30 Speelman, Jonathan S263849 #6730.99
31 Dolmatov, Sergey V2637500.1% #6828.61
32 Chernin, Alexander M263249 #7327.56
33 Gulko, Boris F263150 #7440.64
34 Romanishin, Oleg M262948 #7535.72
35 Sokolov, Andrey Y262949 #7624.53
36 Gavrikov, Victor N262750 #7830.17
37 Lputian, Smbat G262649 #7929.63
38 Vladimirov, Evgeny Y2623600.1% #8930.69
39 Rozentalis, Eduardas262355 #8624.34
40 Agdestein, Simen262251 #8420.37
41 Vyzmanavin, Alexey262252 #8527.74
42 Nunn, John D M261949 #8632.43
43 Malaniuk, Vladimir P261749 #8830.19
44 Hort, Vlastimil261550 #9143.72
45 Smirin, Ilia2614610.1% #9919.69
46 Pintér, József261052 #9733.89
47 Lerner, Konstantin Z260850 #9837.59
48 Chandler, Murray G260748 #9827.49
49 Dvoiris, Semen I260558 #10728.91
50 Gipslis, Aivars260462 #11150.64
51 Huzman, Alexander260254 #10725.47
52 Bareev, Evgeny260151 #10620.86
53 Azmaiparashvili, Zurab A260052 #10927.54
54 Dokhoian, Yury259954 #11022.92
55 Georgiev, Kiril259851 #11021.84
56 Smyslov, Vassily V259850 #11066.52
57 Miles, Anthony J259747 #10832.44
58 Larsen, Bent259751 #11152.57
59 Smagin, Sergey259750 #11029.06
60 Dorfman, Iosif D259657 #11735.41
61 Kharitonov, Andrey Y259555 #11628.49
62 Yermolinsky, Alex V259455 #11729.47
63 Razuvaev, Yury S259250 #11641.96
64 Vasiukov, Evgeny A259158 #12354.57
65 Christiansen, Larry M259150 #11731.26
66 Rashkovsky, Nukhim N259051 #11941.45
67 Murey, Yakov258752 #12146.16
68 Dzindzichashvili, Roman Y258659 #12943.40
69 Ivanchuk, Vassily258454 #12818.53
70 Sveshnikov, Evgeny E258450 #12537.63
71 Anand, Viswanathan258354 #12817.80
72 Mikhalchishin, Adrian B258351 #12732.87
73 Kruppa, Yuri258256 #13023.27
74 Kupreichik, Viktor D258250 #12638.24
75 Yurtaev, Leonid258157 #13228.41
76 Hansen, Curt258051 #12823.03
77 Ftácnik, Lubomír257949 #12929.91
78 Nogueiras, Jesus257850 #13028.20
79 Torre, Eugenio257750 #13135.90
80 Ubilava, Elizbar E257751 #13337.09
81 Panchenko, Alexander N257656 #13733.98
82 Makarichev, Sergey Y257556 #13833.87
83 Chiburdanidze, Maia G257454 #13726.70
84 Kavalek, Lubomir257452 #13644.14
85 van der Wiel, John T H257448 #13428.14
86 Yudasin, Leonid G257350 #13628.14
87 Glek, Igor V257359 #14325.90
88 Novikov, Igor A257051 #13925.35
89 Zaichik, Gennady L257052 #14030.63
90 Graf, Alexander257059 #14525.10
91 Pigusov, Evgeny257051 #14026.50
92 Podgaets, Mikhail Y257062 #14740.19
93 Kuzmin, Gennady P257055 #14241.70
94 Dreev, Alexey256957 #14418.69
95 Panno, Oscar R256959 #14552.54
96 Marjanovic, Slavoljub256850 #14132.73
97 Popovic, Petar256850 #14128.63
98 Bönsch, Uwe256850 #14128.95
99 Geller, Efim P256751 #14262.58
100 Arkhipov, Sergey256655 #14533.27
101 Kochiev, Alexander256654 31.51
102 Hjartarson, Jóhann256449 24.64
103 Savon, Vladimir A256370 47.01
104 Gorelov, Sergey G256358 30.12
105 Serper, Grigory256257 18.04
106 Ivanov, Igor V256260 40.73
107 Bronstein, David I256265 63.61
108 Bagirov, Vladimir K256155 51.12
109 Shneider, Aleksandr256058 25.36
110 Vaisser, Anatoli255954 38.57
111 Adorján, András255950 37.50
112 Fedorowicz, John P255850 29.01
113 Karlsson, Lars255851 32.22
114 Sosonko, Gennadi255750 44.37
115 Suba, Mihai255749 40.33
116 Cámpora, Daniel H255751 30.25
117 Benjamin, Joel L255750 23.55
118 Kaidanov, Gregory S255652 27.96
119 Kengis, Edvins255552 28.47
120 Goldin, Alexander255454 22.59
121 Uhlmann, Wolfgang255450 52.50
122 Gheorghiu, Florin255450 43.48
123 Tseshkovsky, Vitaly V255352 43.01
124 Gligoric, Svetozar255256 64.66
125 Epishin, Vladimir255158 22.22
126 Cifuentes Parada, Roberto255056 29.77
127 Cvitan, Ognjen255051 25.96
128 Yakovich, Yuri254951 24.83
129 Knaak, Rainer F254750 34.54
130 Olafsson, Helgi254650 31.12
131 Gufeld, Eduard E254660 51.53
132 Timoshchenko, Gennady254653 38.42
133 Liberzon, Vladimir M254572 50.52
134 Quinteros, Miguel A254453 39.76
135 Pétursson, Margeir254349 27.62
136 Kuzmin, Alexey254268 24.56
137 Kholmov, Ratmir D254157 62.38
138 Korzubov, Peter254168 25.74
139 Henley, Ron W254067 30.82
140 Shabanov, Yury F254059 49.88
141 Matanovic, Aleksandar253975 57.35
142 Smejkal, Jan253951 41.52
143 Alburt, Lev O253951 42.11
144 Taimanov, Mark E253865 61.65
145 Palatnik, Semen A253755 37.51
146 Vorotnikov, Vladislav V253774 40.12
147 Neverov, Valery253755 23.27
148 Ekstroem, Roland253665 31.36
149 Reshevsky, Samuel H253565 75.84
150 Kindermann, Stefan253549 27.76
151 Gruenfeld, Yehuda253451 31.59
152 Barua, Dibyendu253459 20.92
153 Garcia Palermo, Carlos253350 33.83
154 Inkiov, Ventzislav253251 31.36
155 Kantsler, Boris253155 25.45
156 Kurajica, Bojan253154 39.87
157 Adianto, Utut253057 22.54
158 Dueball, Juergen253074 42.50
159 Kudrin, Sergey253050 28.06
160 Chekhov, Valery A253053 31.84
161 Rodriguez, Amador252750 31.06
162 Dlugy, Maxim252651 21.67
163 Petrosian, Arshak B252554 33.79
164 Spraggett, Kevin B252452 32.89
165 Guseinov, Aidyn252463 35.74
166 Morovic Fernández, Iván E252356 24.52
167 Arnason, Jon L252350 26.88
168 Browne, Walter S252351 38.72
169 Sokolov, Ivan252254 19.30
170 Oll, Lembit252252 21.44
171 Velimirovic, Dragoljub252250 45.38
172 Ivanov, Alexander V252261 31.41
173 Csom, István252251 47.33
174 Velikov, Petar252255 36.50
175 Byrne, Robert E252159 59.44
176 Lau, Ralf252151 27.94
177 Magerramov, Elmar S251962 29.47
178 Nemet, Ivan251973 44.46
179 Mestel, A Jonathan251952 30.55
180 Greenfeld, Alon251952 23.45
181 Didishko, Vereslav251966 38.47
182 Gaprindashvili, Nona251863 46.41
183 Aseev, Konstantin N251857 26.94
184 Barbero, Gerardo F251856 26.11
185 Sturua, Zurab251767 28.31
186 Meduna, Eduard251750 37.05
187 Ghinda, Mihail Viorel251655 38.18
188 Watson, William N251651 25.45
189 Grigorian, Karen A251568 40.06
190 Sunye Neto, Jaime251553 30.41
191 Barlov, Dragan251551 30.67
192 Kovacevic, Vladimir251556 45.51
193 Groszpeter, Attila251453 27.31
194 Wedberg, Tom251355 33.84
195 García Gonzáles, Guillermo251350 33.81
196 Hulak, Krunoslav251350 36.35
197 Rogers, Ian251250 27.27
198 Antunes, Antonio251267 25.65
199 Nikolac, Juraj251265 55.44
200 Lein, Anatoly251154 56.51
201 Todorcevic, Miodrag251153 46.89
202 Lobron, Eric251149 27.40
203 Vitolinš, Alvis251065 41.29
204 Veingold, Aleksander250875 33.96
205 Petrienko, Vladimir250862 32.56
206 Loginov, Valery A250859 31.80
207 Dautov, Rustem250862 21.84
208 London, Dimitri250765 24.86
209 Ostermeyer, Peter250662 43.96
210 Mokrý, Karel250549 28.65
211 Hodgson, Julian M250450 24.18
212 Ivkov, Borislav250454 53.88
213 Hellers, Ferdinand250454 18.67
214 Lukacs, Peter250450 37.22
215 Zapata, Alonso250350 29.11
216 Georgadze, Tamaz V250355 39.89
217 Joksic, Sinisa250271 46.96
218 Unzicker, Wolfgang250257 62.26
219 Georgiev, Krum250152 29.35
220 Ivanovic, Božidar250154 41.10
221 Kalinitschew, Sergey250162 31.66
222 Faragó, Iván250048 41.49
223 Basin, Leonid249965 29.85
224 Bischoff, Klaus249951 26.31
225 Hazai, Laszlo249951 34.29
226 Raicevic, Momcilo249963
227 Klovans, Janis249861 52.47
228 Lalic, Bogdan249760 23.56
229 Tringov, Georgy P249757 50.56
230 Seret, Jean Luc249759
231 Cebalo, Mišo249651 42.65
232 Plaskett, Jim249551 27.53
233 Schussler, Harry249555 30.27
234 Illescas Cordoba, Miguel249554 21.82
235 Xu Jun249552 25.04
236 Govedarica, Radovan249461 39.63
237 Vogt, Lothar H249453 35.70
238 Ernst, Thomas249452 27.12
239 Lanka, Zigurds249461 27.36
240 Hebden, Mark249355 29.62
241 Pytel, Krzysztof249266 42.37
242 Ermenkov, Evgenij249255 38.00
243 Vukic, Milan249165 44.11
244 Abramovic, Boško249153 36.63
245 Van der Sterren, Paul249150 31.54
246 Fokin, Sergey249070 31.95
247 Shamkovich, Leonid A249059 64.33
248 Wilder, Michael248954 25.04
249 Soppe, Guillermo248969 27.04
250 Tischbierek, Raj248951 25.02
251 Legky, Nikolay A248868 32.47
252 Foisor, Ovidiu248753 28.48
253 Matulovic, Milan248459 52.30
254 Donchev, Dimitar I248457 29.19
255 Vera, Reynaldo248454 26.73
256 Reyes, Juan248365 24.43
257 Mnatsakanian, Eduard A248366 48.81
258 Kogan, Boris248357
259 Simic, Radoslav248366 39.31
260 Dizdar, Goran248255 28.82
261 Birnboim, Nathan248253 36.84
262 Rukavina, Josip248257 44.84
263 Gurevich, Dmitry248151 31.05
264 Stohl, Igor248051 23.01
265 Stoica, Valentin247859 37.62
266 Staniszewski, Piotr247853 21.07
267 deFirmian, Nicholas E247850 30.18
268 Jansa, Vlastimil247850 44.84
269 Moskalenko, Viktor247866 26.82
270 Winants, Luc247853 24.74
271 Drasko, Milan247753 24.81
272 Ionescu, Constantin247754 29.05
273 Filipenko, Alexander V247775 38.57
274 Gutman, Lev247650 42.01
275 Klaric, Zlatko247665 30.93
276 Cramling, Dan247564 28.65
277 Klundt, Klaus247571 45.76
278 Wirthensohn, Heinz247559 36.40
279 Schneider, Lars Ake247556
280 Nun, Josef247466 54.19
281 Portisch, Ferenc247463 48.47
282 Ree, Hans247354 43.04
283 Rivas Pastor, Manuel247357 27.21
284 Pfleger, Helmut247359 44.15
285 Nikolic, Zivoslav247356 33.80
286 Szmetan, Jorge247162 37.34
287 Wolf, Volker247164 30.06
288 Andres Mendez, Miguel247063
289 Petrushin, Alexander I247073 40.55
290 Podzielny, Karl Heinz247076 33.05
291 Gurgenidze, Bukhuti I247055 53.88
292 Espig, Lutz247055 38.73
293 Kurtenkov, Atanas247065 24.16
294 Hjorth, Greg246970 24.21
295 Ostojic, Predrag246970 49.61
296 Vaulin, Alexander246869 30.53
297 Szabó, László246870 70.53
298 Szekely, Peter246856 32.64
299 Gomez Baillo, Jorge H246860 28.45
300 Lechtynsky, Jiri246852 39.85
301 Řgaard, Leif246858 35.73
302 Plachetka, Jan246851 42.62
303 Mednis, Edmar J246761 50.52
304 Popchev, Milko246756 22.88
305 Eslon, Jaan246769 35.57
306 Sideif Sade, Fikret I246758 35.74
307 Knezevic, Milorad246650 50.91
308 Mortensen, Erling246652 32.48
309 Hecht, Hans-Joachim246662 48.67
310 Belov, Igor246663
311 Nun, Jiri246656 30.17
312 Jelen, Iztok246572 40.70
313 Lombardy, William J246560 49.82
314 Piesina, Gintautas246568 35.48
315 Frias, Victor J246469 31.64
316 Sahovic, Dragutin246462 47.14
317 Pribyl, Josef246354 39.96
318 Kosten, Anthony C246354 29.18
319 Yrjola, Jouni246351 27.93
320 Ambroz, Jan246359 33.28
321 Flear, Glenn C246350 28.63
322 Piket, Jeroen246356 18.67
323 Rakic, Tomislav246265 52.88
324 Marin, Mihail246156 22.44
325 Rajkovic, Dusan246158 45.29
326 Marangunic, Srdjan246166 43.91
327 Bukal, Vladimir Sr246158 47.91
328 Yap, Andronico246159
329 Hickl, Joerg246052 22.45
330 Li Zunian246059 29.73
331 Hawelko, Marek246051 28.14
332 Rohde, Michael A246053 28.09
333 Tseitlin, Mikhail S245968 40.29
334 Fernandez Garcia, Jose Luis245956 33.41
335 Veinger, Itzhak245957 49.23
336 Akesson, Ralf245960 26.64
337 Blatny, Pavel245954 19.27
338 Renet, Olivier245851 22.77
339 Murshed, Niaz245864 21.38
340 Lanc, Alois245851 39.62
341 Helmers, Knut J245866 30.65
342 Barbulescu, Dan245756 23.27
343 Krasenkow, Michal245765 23.88
344 Tempone, Marcelo245773 25.06
345 Khasin, Alexander245761 36.42
346 Kremenetsky, Anatoly M245772 48.71
347 Ziatdinov, Raset245770 28.76
348 Thorsteins, Karl245655 22.96
349 Ricardi, Pablo245556 25.60
350 Verduga, Denis Homero245557
351 Valkesalmi, Kimmo245555 26.41
352 Pekarek, Ales245452 25.79
353 Karpman, Vadim245469 22.38
354 Granda Zuńiga, Julio E245453 20.60
355 Hermann, Manfred245366 45.08
356 Santo Roman, Marc245370 27.05
357 Womacka, Mathias245274 21.26
358 Semkov, Semko245159 27.59
359 Sharif, Mershad245157 35.22
360 Cabrilo, Goran245164 29.24
361 Polgar, Zsuzsa245150 18.45
362 Horvath, Jozsef245052 23.13
363 Janovsky, Sergey245076 27.62
364 Lukin, Andrei M245066 39.09
365 Pedersen, Erik244962 29.05
366 Renman, Nils Gustaf244961
367 Schmidt, Wlodzimierz244849 44.47
368 Gauglitz, Gernot244858 25.26
369 Keitlinghaus, Ludger244761 22.18
370 Kirov Ivanov, Nino244654 42.06
371 Vokác, Marek244657 28.81
372 Braga, Fernando244660 29.22
373 Ardiansyah, Haji244560 35.82
374 Casper, Thomas244553 28.54
375 Tisdall, Jonathan D244555 29.09
376 Talavera, JC.244569
377 Shtyrenkov, Veniamen244570 29.44
378 Potts, Alan244568
379 Efimov, Igor244571 27.04
380 Radulov, Ivan244555 48.73
381 Ryskin, Alexander244572 24.72
382 Ornstein, Axel244456 35.43
383 Sigurjónsson, Gudmundur244456 40.01
384 Reeh, Oliver244460 23.70
385 Leski, Marc244466 26.26
386 Wockenfuss, Klaus244459 36.09
387 Popov, Luben244373 51.67
388 Giorgadze, Giorgi244366 22.96
389 King, Daniel J244351 24.09
390 Kolev, Atanas244268 20.21
391 Tatai, Stefano244255 49.52
392 Trapl, Jindrich244261 45.52
393 Kouatly, Bachar244150 29.57
394 Rechlis, Gad244155 20.65
395 Kraidman, Yair244064 54.91
396 Lalev, Dimitar243970 27.70
397 Rachels, Stuart243962 18.01
398 Spiridonov, Nikola243856 49.59
399 Filipovic, Branko243860 29.98
400 Sorokin, Maxim243870 19.69
401 Rigo, Janos243862 38.92
402 Akhmilovskaya, Elena243861
403 Rodriguez, Ruben243869 40.81
404 Hertneck, Gerald243654 24.03
405 Lazic, Miroljub243571 21.26
406 Spassov, Liuben243556 44.52
407 Bielczyk, Jacek243557 34.60
408 Gruenberg, Hans Ulrich243457 31.72
409 Wittmann, Walter243456 39.55
410 Heinbuch, Detlef243457 26.72
411 Imanaliev, Taalaibek243463
412 Rodriguez Vargas, Orestes243461 44.24
413 Ye Jiangchuan243363 26.86
414 Handoko, Edhi243359 27.09
415 Wiedenkeller, Michael243354 24.72
416 Klinger, Josef243352 20.31
417 Meyer, E.243376
418 Gruenenwald, Joerg243269 22.32
419 Kuligowski, Adam243156 31.77
420 Ochoa de Echaguen, F Javier243158 33.07
421 Kallai, Gabor243157 28.61
422 Hamann, Svend243072 46.97
423 Ost Hansen, Jacob243074
424 Filipowicz, Andrzej243060 49.38
425 Schoenthier, Frank243073 28.87
426 Benko, Pal C242963 59.21
427 Martinovic, Slobodan242958 42.18
428 Sendera, Jaroslaw242969 22.43
429 Matlak, Marek242954 21.52
430 Hug, Werner242857 35.05
431 Schulte, Oliver242865 18.77
432 Brueckner, Thomas242861 24.18
433 Velickovic, Sasa242873 36.49
434 Barczay, Laszlo242757 51.61
435 Zagrebelny, Sergey242775
436 Kelecevic, Nedeljko242771 40.55
437 Lengyel, Levente242766 54.30
438 Sanna, Gianlazzaro242772 27.47
439 Prandstetter, Eduard242651 38.79
440 Davies, Nigel R242653 27.16
441 Garcia, Gildardo242661 33.56
442 Bilek, István242665 55.13
443 Horvath, Tamas242558 35.93
444 Bany, Jerzy242553 26.57
445 Mariotti, Sergio242563 41.14
446 Motwani, Paul242561 25.30
447 Luther, Thomas242561 17.90
448 Wolff, Patrick G242556 19.62
449 Sznapik, Aleksander242452 36.64
450 Ligterink, Gert242453 37.87
451 Schneider, Attila242357 32.46
452 Mascarinas, Rico242370 34.58
453 Temirbaev, Serik242360
454 Ulibin, Mikhail242364 16.33
455 Jakobsen, Ole242261 44.94
456 Schweber, Samuel242275 51.20
457 Kestler, Hans-Günter242270 47.80
458 Thipsay, Praveen Mahadeo242158 28.13
459 Soltis, Andrew E242162 40.34
460 Kuczynski, Robert242152 21.45
461 Jasnikowski, Zbigniew242155 32.38
462 Ghitescu, Theodor242160 53.68
463 Liang Jinrong242160 27.36
464 Adams, Michael242164 15.87
465 Ilic, Zoran242073 24.16
466 Robatsch, Karl242055 58.95
467 Toth, Bela242062 44.45
468 Kristiansen, Jens241953 35.35
469 Paehtz, Thomas Sr241955 31.07
470 Hernandez, Roman241960 37.85
471 Karsa, Laszlo241963 32.05
472 Pelts, Roman241971 50.55
473 Haik, Aldo241951 34.94
474 Karolyi, Tibor Jr241953 25.87
475 Scheeren, Peter241861 32.17
476 McCambridge, Vincent241763 27.56
477 Sonntag, Hans Hubert241767
478 Pein, Malcolm241760 27.13
479 Diaz, Joaquin C241757 39.23
480 Orso, Miklos241768 31.31
481 Rubinetti, Jorge A241760 42.50
482 Qi Jingxuan241761 39.89
483 Doncevic, Dario241565 29.72
484 Mainka, Romuald241568 24.37
485 Pliester, Leon241464 33.11
486 Wahls, Matthias241357 19.68
487 Garcia Martinez, Silvino241353 43.24
488 Gerusel, Mathias241371 49.65
489 Milos, Gilberto241355 23.91
490 Gallagher, Joseph G241361 23.40
491 Sherzer, Alex241164 16.66
492 Vilela, Jose Luis241155 34.53
493 De Wit, Johannes S241173 23.01
494 Djuric, Stefan241052 32.18
495 Breyther, Ruediger241071 34.09
496 Bohm, Hans241069 37.71
497 McNab, Colin Anderson241060 26.66
498 Suetin, Alexey S241058 60.87
499 Mencinger, Vojko241069 29.48
500 Paulsen, Dirk240965 28.67

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