< December 31, 1986     Back to date list    February 28, 1987 >

Top 10 active players as of January 31, 1987


Top 500 active players as of January 31, 1987

  #  

Player Rating +/- Best? 75%? Age
1 Kasparov, Garry K28254969.2% #223.80
2 Karpov, Anatoly E27774921.5% #435.69
3 Tal, Mikhail2694491.0% #2850.23
4 Jussupow, Artur M2693501.0% #2926.96
5 Psakhis, Lev B2680490.5% #3628.17
6 Khalifman, Alexander2679520.7% #3921.04
7 Beliavsky, Alexander G2676490.4% #4033.12
8 Ljubojevic, Ljubomir2675490.4% #4036.24
9 Hübner, Robert2670490.3% #4438.23
10 Timman, Jan H2670480.3% #4435.13
11 Tukmakov, Vladimir B2669510.3% #4640.88
12 Portisch, Lajos2665480.2% #4849.82
13 Korchnoi, Viktor L2664480.2% #4855.86
14 Sokolov, Andrey Y2660500.2% #5323.86
15 Short, Nigel D2658480.1% #5221.66
16 Polugaevsky, Lev A2658510.2% #5452.20
17 Ribli, Zoltán2654490.1% #5735.40
18 Gurevich, Mikhail N2649510.1% #6327.94
19 Vaganian, Rafael A2648490.1% #6335.29
20 Lerner, Konstantin Z2647500.1% #6436.92
21 Seirawan, Yasser2647500.1% #6526.85
22 Spassky, Boris V2646490.1% #6450.00
23 Vasiukov, Evgeny A2646630.4% #7453.90
24 Eingorn, Viacheslav S2645500.1% #6630.18
25 Gavrikov, Victor N2644510.1% #6829.51
26 Andersson, Ulf2644500.1% #6735.59
27 Bareev, Evgeny2643530.1% #6920.19
28 Nikolic, Predrag2639510.1% #7326.39
29 Chandler, Murray G263849 #7226.82
30 Chernin, Alexander M2637500.1% #7426.90
31 Lputian, Smbat G263449 #7628.96
32 Miles, Anthony J263347 #7631.77
33 Salov, Valery B2631530.1% #8222.68
34 Nunn, John D M263149 #7931.77
35 Dolmatov, Sergey V2629510.1% #8327.94
36 Sax, Gyula262950 #8235.62
37 Malaniuk, Vladimir P262851 #8329.53
38 Ehlvest, Jaan2628530.1% #8624.30
39 Ivanchuk, Vassily2624550.1% #9117.87
40 Balashov, Yury S262350 #8837.88
41 Gulko, Boris F262353 #9039.97
42 Torre, Eugenio262254 #9135.24
43 Naumkin, Igor2622730.5% #10621.47
44 Pintér, József262252 #9133.23
45 Vyzmanavin, Alexey262153 #9227.08
46 Vladimirov, Evgeny Y2619570.1% #9830.03
47 Dorfman, Iosif D261754 #9834.75
48 Kuzmin, Gennady P2616560.1% #10041.03
49 Larsen, Bent261451 #9751.91
50 Romanishin, Oleg M261449 #9635.06
51 Ubilava, Elizbar E260851 #10536.43
52 Gelfand, Boris2608630.1% #11418.60
53 Hort, Vlastimil260749 #10543.05
54 Razuvaev, Yury S260550 #10841.31
55 Huzman, Alexander260454 #11224.81
56 Yurtaev, Leonid260459 #11527.75
57 Rashkovsky, Nukhim N260452 #11040.79
58 Azmaiparashvili, Zurab A260451 #11026.87
59 Speelman, Jonathan S260349 #10830.33
60 Sveshnikov, Evgeny E260151 #11236.96
61 Goldin, Alexander260155 #11621.92
62 Kharitonov, Andrey Y260155 #11527.82
63 Geller, Efim P260051 #11461.91
64 Dzindzichashvili, Roman Y259960 #12042.74
65 Dokhoian, Yury259954 #11722.26
66 Kruppa, Yuri259857 #11922.61
67 Smyslov, Vassily V259850 #11565.85
68 Agdestein, Simen259653 #11919.71
69 Novikov, Igor A259651 #11824.69
70 Georgiev, Kiril259552 #12021.17
71 Christiansen, Larry M259451 #12030.59
72 Tseshkovsky, Vitaly V259351 #12142.35
73 Rozentalis, Eduardas259357 #12623.68
74 Yermolinsky, Alex V258855 #12828.80
75 Mikhalchishin, Adrian B258851 #12632.20
76 Shneider, Aleksandr258660 #13324.69
77 Zaichik, Gennady L258654 #13029.96
78 Kengis, Edvins258654 #13027.80
79 Yudasin, Leonid G258650 #12827.48
80 Dvoiris, Semen I258655 #13128.24
81 Hansen, Curt258550 #12922.37
82 Makarichev, Sergey Y258555 #13233.20
83 Smagin, Sergey258551 #13028.40
84 Panchenko, Alexander N258455 #13333.32
85 Nogueiras, Jesus258450 #13027.54
86 Gheorghiu, Florin258451 #13142.82
87 Kavalek, Lubomir258352 #13243.48
88 Panno, Oscar R258164 #14251.87
89 Gipslis, Aivars2581690.1% #14549.97
90 Parma, Bruno2581730.1% #14745.09
91 Graf, Alexander258058 #13924.43
92 Suba, Mihai257850 #13639.66
93 Pigusov, Evgeny257851 #13825.83
94 Knaak, Rainer F257750 #13633.87
95 Glek, Igor V257760 #14325.23
96 Kupreichik, Viktor D257651 #13837.58
97 Kochiev, Alexander257457 #14430.85
98 Tarjan, James E257466 #15034.94
99 Olafsson, Helgi257351 #14130.46
100 Adorján, András257349 #14036.83
101 Chiburdanidze, Maia G257354 26.04
102 van der Wiel, John T H257249 27.48
103 Sosonko, Gennadi257151 43.70
104 Marjanovic, Slavoljub257151 32.07
105 Smirin, Ilia256969 19.03
106 Gorelov, Sergey G256857 29.45
107 Timoshchenko, Gennady256753 37.76
108 Benjamin, Joel L256651 22.89
109 Podgaets, Mikhail Y256662 39.52
110 Alburt, Lev O256651 41.44
111 Kuzmin, Alexey256662 23.90
112 Savon, Vladimir A256276 46.35
113 Cámpora, Daniel H256255 29.59
114 Ftácnik, Lubomír256149 29.25
115 Kurajica, Bojan256154 39.21
116 Gligoric, Svetozar256153 63.99
117 Dreev, Alexey256057 18.03
118 Byrne, Robert E255561 58.78
119 Petrosian, Arshak B255555 33.12
120 García Gonzáles, Guillermo255451 33.14
121 Zapata, Alonso255450 28.44
122 Gruenfeld, Yehuda255452 30.92
123 Bagirov, Vladimir K255456 50.46
124 Korzubov, Peter255467 25.08
125 Lobron, Eric255450 26.73
126 Kantsler, Boris255258 24.79
127 Smejkal, Jan255249 40.86
128 Shabanov, Yury F255059 49.22
129 Popovic, Petar255051 27.96
130 Gufeld, Eduard E255059 50.87
131 Murey, Yakov255053 45.49
132 London, Dimitri254868 24.19
133 Vaisser, Anatoli254753 37.90
134 Matanovic, Aleksandar254774 56.69
135 Arkhipov, Sergey254755 32.61
136 Didishko, Vereslav254765 37.81
137 Yakovich, Yuri254751 24.17
138 Ivanov, Igor V254760 40.06
139 Osnos, Viacheslav V254670 51.52
140 Najdorf, Miguel254575 76.79
141 Garcia Palermo, Carlos254451 33.16
142 Reshevsky, Samuel H254463 75.18
143 Kovacevic, Vladimir254455 44.85
144 Quinteros, Miguel A254352 39.09
145 Barua, Dibyendu254361 20.26
146 Uhlmann, Wolfgang254251 51.84
147 Matulovic, Milan254164 51.64
148 Karlsson, Lars254151 31.55
149 Henley, Ron W254162 30.15
150 Faragó, Iván254049 40.83
151 Taimanov, Mark E254062 60.98
152 Cvitan, Ognjen254052 25.31
153 Neverov, Valery253955 22.61
154 Fedorowicz, John P253951 28.34
155 Hulak, Krunoslav253853 35.68
156 Oll, Lembit253853 20.77
157 Kholmov, Ratmir D253757 61.72
158 Dueball, Juergen253775 41.84
159 Chekhov, Valery A253551 31.18
160 Bönsch, Uwe253450 28.29
161 Wedberg, Tom253459 33.18
162 Rogers, Ian253450 26.60
163 Arnason, Jon L253451 26.22
164 Hjartarson, Jóhann253450 23.97
165 Kaidanov, Gregory S253454 27.30
166 Pétursson, Margeir253350 26.95
167 Morovic Fernández, Iván E253357 23.85
168 Ivkov, Borislav253353 53.22
169 Epishin, Vladimir253359 21.55
170 Anand, Viswanathan253059 17.14
171 Kindermann, Stefan253049 27.09
172 Sturua, Zurab252967 27.65
173 Veingold, Aleksander252967 33.31
174 Guseinov, Aidyn252763 35.08
175 Velikov, Petar252653 35.84
176 Vorotnikov, Vladislav V252567 39.45
177 Groszpeter, Attila252553 26.64
178 Sunye Neto, Jaime252351 29.74
179 Lau, Ralf252351 27.28
180 Palatnik, Semen A252260 36.85
181 Mestel, A Jonathan252252 29.88
182 Serper, Grigory252260 17.38
183 Ivanov, Alexander V252260 30.75
184 Rukavina, Josip252156 44.17
185 deFirmian, Nicholas E252050 29.51
186 Liberzon, Vladimir M251974 49.86
187 Velimirovic, Dragoljub251951 44.72
188 Spraggett, Kevin B251952 32.22
189 Csom, István251851 46.66
190 Barbulescu, Dan251657 22.61
191 Cebalo, Mišo251550 41.98
192 Schneider, Lars Ake251458
193 Magerramov, Elmar S251463 28.81
194 Hazai, Laszlo251452 33.63
195 Santo Roman, Marc251465 26.38
196 Cifuentes Parada, Roberto251265 29.11
197 Lanka, Zigurds251260 26.69
198 Unzicker, Wolfgang251258 61.60
199 Vogt, Lothar H251252 35.04
200 Grigorian, Karen A251168 39.40
201 Ostermeyer, Peter251158 43.30
202 Jansa, Vlastimil251150 44.18
203 Inkiov, Ventzislav251151 30.70
204 Birnboim, Nathan251055 36.18
205 Loginov, Valery A251058 31.13
206 Van der Sterren, Paul250952 30.87
207 Dautov, Rustem250962 21.17
208 Georgadze, Tamaz V250855 39.23
209 Hickl, Joerg250857 21.79
210 Dlugy, Maxim250850 21.01
211 Lombardy, William J250859 49.16
212 Greenfeld, Alon250754 22.79
213 Gaprindashvili, Nona250759 45.74
214 Aseev, Konstantin N250755 26.28
215 Franco Ocampos, Zenon250774 30.72
216 Lukacs, Peter250650 36.56
217 Fernandez Garcia, Jose Luis250658 32.74
218 Meduna, Eduard250651 36.39
219 Rodriguez, Amador250652 30.40
220 Bischoff, Klaus250653 25.64
221 Georgiev, Krum250652 28.69
222 Raicevic, Momcilo250560
223 Tringov, Georgy P250558 49.90
224 Browne, Walter S250352 38.06
225 Watson, William N250252 24.79
226 Adianto, Utut250261 21.87
227 Hodgson, Julian M250252 23.52
228 Drasko, Milan250153 24.15
229 Barlov, Dragan250052 30.00
230 Kudrin, Sergey250050 27.40
231 Mokrý, Karel250049 27.98
232 Ivanovic, Božidar250052 40.44
233 Podzielny, Karl Heinz249973 32.39
234 Plaskett, Jim249950 26.87
235 Kovacevic, Vladimir2249968 31.87
236 Gurevich, Dmitry249852 30.39
237 Efimov, Igor249866 26.37
238 Kolarov, Atanas S249871 52.91
239 Ernst, Thomas249753 26.45
240 Ghinda, Mihail Viorel249755 37.52
241 Nikolac, Juraj249765 54.77
242 Basin, Leonid249663 29.19
243 Barbero, Gerardo F249660 25.44
244 Tisdall, Jonathan D249657 28.43
245 Mednis, Edmar J249561 49.86
246 Shamkovich, Leonid A249459 63.66
247 Gomez Baillo, Jorge H249469 27.78
248 Staniszewski, Piotr249459 20.41
249 Antunes, Antonio249470 24.98
250 Vitolinš, Alvis249462 40.63
251 Kalinitschew, Sergey249366 30.99
252 Nemet, Ivan249372 43.80
253 Flear, Glenn C249351 27.96
254 Lalic, Bogdan249162 22.90
255 Kuporosov, Viktor249171 25.35
256 Vukic, Milan249061 43.45
257 Hellers, Ferdinand249055 18.01
258 Illescas Cordoba, Miguel249059 21.16
259 Klaric, Zlatko249059 30.27
260 Kogan, Boris249056
261 Simic, Radoslav249060 38.64
262 Joksic, Sinisa249072 46.31
263 Klovans, Janis248959 51.81
264 Sokolov, Ivan248963 18.63
265 Ziatdinov, Raset248973 28.09
266 Mnatsakanian, Eduard A248963 48.15
267 Haik, Aldo248952 34.28
268 Dizdar, Goran248856 28.16
269 Stohl, Igor248851 22.34
270 Wolf, Volker248865 29.40
271 Vera, Reynaldo248755 26.06
272 Abramovic, Boško248653 35.96
273 Wilder, Michael248555 24.37
274 Yrjola, Jouni248552 27.27
275 Pytel, Krzysztof248562 41.71
276 Pfleger, Helmut248459 43.48
277 Klundt, Klaus248371 45.10
278 Gofshtein, Leonid D248370 33.78
279 Plachetka, Jan248351 41.95
280 Donchev, Dimitar I248354 28.53
281 Gurgenidze, Bukhuti I248255 53.22
282 Řgaard, Leif248156 35.07
283 Seret, Jean Luc248170
284 Ree, Hans248155 42.38
285 Kremenetsky, Anatoly M248171 48.05
286 Hawelko, Marek248055 27.47
287 Schussler, Harry248053 29.60
288 Wirthensohn, Heinz247959 35.74
289 Kirov Ivanov, Nino247954 41.39
290 Helmers, Knut J247860 29.98
291 Winants, Luc247856 24.08
292 Lein, Anatoly247854 55.84
293 Vaulin, Alexander247871 29.87
294 Gutman, Lev247750 41.35
295 Legky, Nikolay A247669 31.80
296 Ermenkov, Evgenij247553 37.34
297 Spassov, Liuben247554 43.86
298 Popchev, Milko247556 22.22
299 Khasin, Alexander247565 35.76
300 Ornstein, Axel247557 34.77
301 Petrushin, Alexander I247466 39.89
302 Espig, Lutz247454 38.07
303 Murshed, Niaz247458 20.72
304 Popov, Luben247267 51.01
305 Lukin, Andrei M247263 38.42
306 Minic, Dragoljub247172 49.90
307 Hecht, Hans-Joachim247165 48.01
308 Portisch, Ferenc247158 47.81
309 Ionescu, Constantin246958 28.38
310 Fokin, Sergey246972 31.30
311 Sahovic, Dragutin246860 46.48
312 Rakic, Tomislav246865 52.22
313 Rivas Pastor, Manuel246855 26.55
314 Sharif, Mershad246763 34.55
315 Peters, John A246775 35.97
316 Lechtynsky, Jiri246752 39.18
317 Pedersen, Erik246760 28.39
318 Machulsky, Anatoly D246762 30.35
319 Szekely, Peter246753 31.97
320 Nikolic, Zivoslav246757 33.13
321 Tischbierek, Raj246751 24.35
322 Zaitsev, Igor A246568 48.68
323 Tseitlin, Mikhail S246464 39.62
324 Rajkovic, Dusan246462 44.62
325 Xu Jun246463 24.37
326 Hartston, William R246474 39.47
327 Janovsky, Sergey246376 26.95
328 Matlak, Marek246358 20.86
329 Soltis, Andrew E246363 39.67
330 Tatai, Stefano246356 48.86
331 Imanaliev, Taalaibek246269
332 Valkesalmi, Kimmo246056 25.75
333 Bilek, István246071 54.47
334 Eslon, Jaan246064 34.91
335 Shvidler, Eliahu246058 27.11
336 Sideif Sade, Fikret I246058 35.08
337 Kolev, Atanas246065 19.54
338 Womacka, Mathias245967 20.60
339 Pekarek, Ales245852 25.12
340 Hermann, Manfred245867 44.42
341 Soppe, Guillermo245770 26.37
342 King, Daniel J245753 23.42
343 Pachmann, Ludek245774 62.72
344 Lanc, Alois245753 38.95
345 Horvath, Jozsef245655 22.47
346 Frias, Victor J245666 30.97
347 Renman, Nils Gustaf245560
348 Vokác, Marek245556 28.15
349 Benko, Pal C245567 58.54
350 Karpman, Vadim245569 21.72
351 Bany, Jerzy245557 25.91
352 Ligterink, Gert245458 37.20
353 Schmidt, Wlodzimierz245350 43.81
354 Filipovic, Branko245362 29.32
355 Mirkovic, Slobodan245373 28.51
356 Karner, Hillar245267 51.51
357 Suetin, Alexey S245261 60.21
358 Hebden, Mark245256 28.95
359 Thorhallsson, Throstur245261 17.87
360 Ardiansyah, Haji245263 35.15
361 Stoica, Valentin245270 36.95
362 Forintos, Gyözö V245159 51.50
363 Blatny, Pavel245153 18.61
364 Polgar, Zsuzsa245152 17.78
365 Sigurjónsson, Gudmundur245154 39.35
366 Akesson, Ralf245158 25.97
367 Gruenberg, Hans Ulrich245054 31.06
368 Shirov, Alexei245073 14.57
369 Piket, Jeroen245056 18.01
370 Kurtenkov, Atanas245060 23.49
371 Knezevic, Milorad245051 50.25
372 Bisguier, Arthur B244970 57.31
373 Moskalenko, Viktor244973 26.16
374 Gruenenwald, Joerg244869 21.66
375 Veinger, Itzhak244857 48.57
376 Qi Jingxuan244763 39.23
377 Velickovic, Sasa244772 35.83
378 Tempone, Marcelo244671 24.40
379 Martinovic, Slobodan244655 41.52
380 Akhmilovskaya, Elena244560
381 Ricardi, Pablo244557 24.93
382 Bukal, Vladimir Sr244462 47.25
383 Thipsay, Praveen Mahadeo244456 27.47
384 Sznapik, Aleksander244453 35.97
385 Gauglitz, Gernot244461 24.59
386 Prandstetter, Eduard244352 38.13
387 Kraidman, Yair244263 54.25
388 Raicevic, Vladimir244259 37.74
389 Schoen, Wolfram244273 19.65
390 Mortensen, Erling244253 31.82
391 Mariotti, Sergio244266 40.47
392 Garcia Martinez, Silvino244154 42.57
393 Radulov, Ivan244156 48.06
394 Krasenkow, Michal244167 23.21
395 Heinbuch, Detlef244158 26.06
396 Thorsteins, Karl244156 22.30
397 Rodriguez, Ruben244172 40.15
398 Li Zunian244059 29.06
399 Wockenfuss, Klaus244057 35.42
400 Giorgadze, Giorgi244069 22.31
401 Kouatly, Bachar244052 28.91
402 Motwani, Paul244063 24.63
403 Barczay, Laszlo244063 50.94
404 Bielczyk, Jacek243955 33.93
405 Braga, Fernando243959 28.56
406 Jakobsen, Ole243960 44.28
407 Nun, Josef243968 53.52
408 Kuczynski, Robert243858 20.79
409 Shtyrenkov, Veniamen243869 28.77
410 Lazic, Miroljub243873 20.59
411 Lalev, Dimitar243868 27.04
412 Wiedenkeller, Michael243753 24.06
413 Nun, Jiri243762 29.51
414 Blees, Albert243758 24.43
415 Spiridonov, Nikola243654 48.92
416 Lengyel, Levente243559 53.63
417 Cramling, Dan243563 27.98
418 Schneider, Attila243556 31.80
419 Kosten, Anthony C243560 28.52
420 Wittmann, Walter243456 38.88
421 Seredenko, Vladimir243372 46.71
422 Ambroz, Jan243264 32.62
423 Handoko, Edhi243260 26.42
424 Sendera, Jaroslaw243169 21.76
425 Kveinys, Aloyzas243171 24.56
426 Foisor, Ovidiu243155 27.82
427 Temirbaev, Serik243161
428 Potts, Alan243169
429 Ochoa de Echaguen, F Javier243063 32.41
430 Sarwinski, Miroslaw243061 33.04
431 Casper, Thomas243056 27.87
432 Yap, Andronico243055
433 Sehner, Norbert243056 26.98
434 Milos, Gilberto242957 23.25
435 Rigo, Janos242962 38.26
436 Klinger, Josef242951 19.65
437 Filipowicz, Andrzej242961 48.72
438 Hernandez, Roman242957 37.19
439 Hawksworth, John C242971 23.15
440 Djuric, Stefan242853 31.51
441 Meister, Peter242767 20.60
442 Solozhenkin, Evgeniy242769 20.50
443 Robatsch, Karl242759 58.30
444 Doncevic, Dario242764 29.05
445 Botterill, George Steven242773
446 Garcia, Gildardo242760 32.89
447 Ost Hansen, Jacob242667
448 Vilela, Jose Luis242654 33.87
449 Borm, Franciscus WM242670
450 Scheeren, Peter242668 31.50
451 McCambridge, Vincent242660 26.90
452 Paehtz, Thomas Sr242652 30.41
453 Kamsky, Gata242673 12.66
454 Karolyi, Tibor Jr242553 25.21
455 Hug, Werner242556 34.39
456 Hertneck, Gerald242554 23.37
457 Paulsen, Dirk242468 28.01
458 Kristiansen, Jens242454 34.68
459 Luczak, Andrzej242468 38.15
460 Kallai, Gabor242457 27.94
461 Zahariev, Zahari242373 25.39
462 Schweber, Samuel242273 50.54
463 Ghitescu, Theodor242270 53.02
464 Adamski, Jan242155 43.22
465 Davies, Nigel R242059 26.50
466 Szmetan, Jorge242073 36.68
467 Bastian, Herbert242062 34.14
468 Atalik, Suat241973 22.31
469 Cabrilo, Goran241966 28.58
470 Semkov, Semko241962 26.92
471 Toshkov, Tihomir241861 27.20
472 Bohm, Hans241863 37.04
473 Trapl, Jindrich241765 44.85
474 Kuligowski, Adam241758 31.10
475 Rubinetti, Jorge A241769 41.83
476 Sanna, Gianlazzaro241670 26.80
477 De Wit, Johannes S241668 22.35
478 Ulibin, Mikhail241665 15.67
479 Trepp, Markus241656
480 Horvath, Tamas241557 35.27
481 McNab, Colin Anderson241564 25.99
482 Damjanovic, Mato241564 59.86
483 Gallagher, Joseph G241564 22.74
484 Sonntag, Hans Hubert241468
485 Ortega, Lexy241457 26.90
486 Renet, Olivier241356 22.11
487 Pyhala, Antti241356 32.35
488 Pelts, Roman241370 49.89
489 Zaltsman, Vitaly F241359 45.26
490 Bronstein, Luis241367 40.66
491 Hoelzl, Franz241363 40.82
492 Danailov, Silvio241255 25.78
493 Gerusel, Mathias241272 48.98
494 Condie, Mark L241259 21.96
495 Kelecevic, Nedeljko241271 39.89
496 Pliester, Leon241259 32.45
497 Barle, Janez241272 34.86
498 Day, Lawrence A241171 37.99
499 Jasnikowski, Zbigniew241155 31.72
500 Schulz, Klaus Juergen241157

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