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Top 10 active players as of May 31, 1980

  #  

Player Rating +/-
1 Karpov, Anatoly E280550
2 Korchnoi, Viktor L276749
3 Kasparov, Garry K272352
4 Portisch, Lajos271350
5 Polugaevsky, Lev A270750
6 Tal, Mikhail270449
7 Spassky, Boris V268849
8 Geller, Efim P268551
9 Larsen, Bent267748
10 Timman, Jan H267647

About these ratings

Top 500 active players as of May 31, 1980

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E28055055.6% #229.02
2 Korchnoi, Viktor L27674920.6% #549.19
3 Kasparov, Garry K2723525.5% #1417.13
4 Portisch, Lajos2713503.2% #1743.16
5 Polugaevsky, Lev A2707502.6% #1945.53
6 Tal, Mikhail2704492.3% #2043.56
7 Spassky, Boris V2688491.1% #2743.34
8 Geller, Efim P2685511.1% #2955.25
9 Larsen, Bent2677480.5% #3345.24
10 Timman, Jan H2676470.5% #3328.46
11 Petrosian, Tigran V2673490.5% #3550.95
12 Beliavsky, Alexander G2673490.5% #3526.46
13 Romanishin, Oleg M2665490.3% #4028.39
14 Hübner, Robert2661500.3% #4331.57
15 Mecking, Henrique2661681.6% #5128.36
16 Balashov, Yury S2659500.3% #4431.22
17 Andersson, Ulf2654480.2% #4628.92
18 Ribli, Zoltán2646500.2% #5328.73
19 Hort, Vlastimil2644480.1% #5336.39
20 Tukmakov, Vladimir B2644530.2% #5634.21
21 Gulko, Boris F2643530.2% #5733.31
22 Vaganian, Rafael A2639490.1% #5828.63
23 Dolmatov, Sergey V2636550.2% #6321.28
24 Lerner, Konstantin Z2636560.2% #6430.26
25 Gufeld, Eduard E2634550.2% #6444.20
26 Vasiukov, Evgeny A2633580.2% #6847.24
27 Ljubojevic, Ljubomir263249 #6329.58
28 Savon, Vladimir A2631570.2% #6839.68
29 Jussupow, Artur M2631520.1% #6620.30
30 Tseshkovsky, Vitaly V2630500.1% #6635.68
31 Sveshnikov, Evgeny E2629510.1% #6630.30
32 Miles, Anthony J262547 #6725.11
33 Kholmov, Ratmir D2620560.1% #7655.05
34 Dzindzichashvili, Roman Y262053 #7536.07
35 Gheorghiu, Florin262049 #7336.15
36 Smejkal, Jan261949 #7334.19
37 Browne, Walter S261949 #7431.39
38 Mikhalchishin, Adrian B261852 #7625.54
39 Kupreichik, Viktor D261853 #7730.91
40 Dorfman, Iosif D261453 #8028.08
41 Ivanov, Igor V2612680.3% #9133.40
42 Smyslov, Vassily V261051 #8359.19
43 Rashkovsky, Nukhim N261056 #8534.12
44 Kavalek, Lubomir261051 #8336.81
45 Kuzmin, Gennady P261051 #8334.37
46 Unzicker, Wolfgang260957 #8754.92
47 Makarichev, Sergey Y260852 #8526.54
48 Parma, Bruno260755 #8838.42
49 Psakhis, Lev B2606610.1% #9321.51
50 Sax, Gyula260649 #8628.95
51 Dvoretsky, Mark I2604640.1% #9632.48
52 Bagirov, Vladimir K260054 #9443.79
53 Gipslis, Aivars2600620.1% #9943.31
54 Georgadze, Tamaz V259852 #9432.56
55 Sosonko, Gennadi259849 #9337.04
56 Ivkov, Borislav259749 #9446.55
57 Kurajica, Bojan259753 #9632.54
58 Palatnik, Semen A2596650.1% #10430.18
59 Kochiev, Alexander259654 #9824.18
60 Alburt, Lev O259352 #10034.78
61 Gligoric, Svetozar259149 #9957.33
62 Razuvaev, Yury S258952 #10234.64
63 Liberzon, Vladimir M258851 #10343.19
64 Tarjan, James E258654 #10728.28
65 Adorján, András258449 #10630.17
66 Nunn, John D M258451 #10725.10
67 Bronstein, David I258156 #11356.28
68 Olafsson, Fridrik257758 #11845.35
69 Szabó, László257563 #12363.20
70 Seirawan, Yasser257252 #12020.19
71 Taimanov, Mark E257258 #12354.32
72 Chekhov, Valery A257268 #12924.51
73 Pfleger, Helmut257259 #12436.82
74 Grigorian, Karen A257057 #12432.73
75 Zakharov, Alexander V2570750.1% #13636.65
76 Suetin, Alexey S256960 #12653.54
77 Byrne, Robert E256651 #12452.11
78 Kapengut, Albert Z256564 #13335.91
79 Ftácnik, Lubomír256551 #12622.59
80 Matanovic, Aleksandar256462 #13350.02
81 Panchenko, Alexander N256261 #13426.65
82 Darga, Klaus V256161 #13446.27
83 Stean, Michael F256049 #12826.74
84 Antoshin, Vladimir S256060 #13651.05
85 Ubilava, Elizbar E256065 #13929.76
86 Quinteros, Miguel A255850 #13132.43
87 Magerramov, Elmar S255658 #13722.14
88 Tseitlin, Mikhail S255654 #13532.95
89 Zaitsev, Igor A255555 #13742.01
90 Matulovic, Milan255460 #14144.97
91 Nemet, Ivan255355 #13937.13
92 Lombardy, William J255256 #13942.49
93 Klovans, Janis255269 #14845.14
94 Rogoff, Kenneth S255164 #14627.19
95 Lein, Anatoly255151 #13849.18
96 Panno, Oscar R255152 #14045.21
97 Knaak, Rainer F255051 #13827.21
98 Uhlmann, Wolfgang254851 #14145.17
99 Csom, István254750 #14139.99
100 Kharitonov, Andrey Y254760 #14721.16
101 Evans, Larry M254671 48.19
102 Timoshchenko, Gennady254655 31.09
103 Filip, Miroslav254561 51.59
104 Tringov, Georgy P254559 43.23
105 Kovacevic, Vladimir254556 38.18
106 Vogt, Lothar H254449 28.37
107 Luczak, Andrzej254354 31.49
108 Ivanov, Alexander V254361 24.08
109 Bukic, Enver254157 42.50
110 Pachmann, Ludek254058 56.05
111 Veingold, Aleksander254068 26.64
112 Speelman, Jonathan S253951 23.66
113 Yurtaev, Leonid253763 21.08
114 Katalymov, Boris N253774
115 Shamkovich, Leonid A253652 56.99
116 Vitolinš, Alvis253664 33.95
117 Najdorf, Miguel253653 70.13
118 Nei, Iivo253665 48.58
119 Nikolac, Juraj253555 48.11
120 Pintér, József253455 26.56
121 Eingorn, Viacheslav S253070 23.52
122 Ree, Hans253049 35.71
123 Gruenfeld, Yehuda253055 24.26
124 Biyiasas, Peter252953 29.53
125 Kaplan, Julio P252960 29.85
126 Vorotnikov, Vladislav V252967 32.79
127 Vukic, Milan252955 36.78
128 Faragó, Iván252949 34.16
129 Torre, Eugenio252650 28.57
130 Benko, Pal C252661 51.88
131 Peresipkin, Vladimir252666
132 Peters, John A252557 29.31
133 Petrosian, Arshak B252368 26.46
134 Zaltsman, Vitaly F252361 38.60
135 Díez del Corral, Jesús252260 47.15
136 Stoica, Valentin252263 30.29
137 Piasetski, Leon David252171
138 Reshevsky, Samuel H252057 68.51
139 Marjanovic, Slavoljub251852 25.40
140 Weinstein, Norman251864 29.66
141 Moiseev, Oleg L251762 55.07
142 Velimirovic, Dragoljub251651 38.05
143 Christiansen, Larry M251652 23.92
144 Gurgenidze, Bukhuti I251569 46.55
145 Keene, Raymond251553
146 Averkin, Orest N251474 36.27
147 Malich, Burkhard G251458 43.51
148 Knezevic, Milorad251453 43.58
149 Schneider, Lars Ake251355
150 Lutikov, Anatoly S251364 47.32
151 Radulov, Ivan251355 41.40
152 Lukin, Andrei M251268 31.76
153 Schmidt, Wlodzimierz251051 37.14
154 Kakageldyev, Amanmurad250967 30.43
155 Hulak, Krunoslav250962 29.02
156 Bleiman, Yaacov250864 32.73
157 Petrushin, Alexander I250765 33.22
158 Tatai, Stefano250756 42.19
159 Anikaev, Yury250659 31.92
160 Suba, Mihai250455 32.99
161 Donner, Johannes H250255 52.90
162 Vokác, Marek250258 21.48
163 Bilek, István250160 47.80
164 Hecht, Hans-Joachim250166 41.34
165 Popov, Luben250157 44.34
166 Padevsky, Nikola B250059 47.01
167 García Gonzáles, Guillermo250053 26.48
168 Marangunic, Srdjan249961 36.58
169 Sunye Neto, Jaime249754 23.08
170 Mariotti, Sergio249658 33.81
171 Polovodin, Igor A249668 25.19
172 Kirov Ivanov, Nino249652 34.73
173 Kraidman, Yair249463 47.58
174 Regan, Kenneth249462 20.72
175 Jansson, Borje249366 38.22
176 Grefe, John A249264 32.73
177 Barczay, Laszlo249152 44.28
178 Lputian, Smbat G249161 22.30
179 Gavrikov, Victor N249062 22.84
180 Sturua, Zurab249065 20.97
181 Diesen, Mark C249059
182 van der Wiel, John T H249052 20.81
183 Makropoulos, Georgios248959 26.68
184 Ermenkov, Evgenij248952 30.67
185 Ungureanu, Emil248973 43.58
186 Wedberg, Tom248754 26.51
187 Marovic, Dražen248662 42.38
188 Minic, Dragoljub248671 43.24
189 Sigurjónsson, Gudmundur248652 32.68
190 Lechtynsky, Jiri248653 32.52
191 Zuckerman, Bernard248665 37.17
192 Vadasz, Laszlo248654 32.34
193 Soltis, Andrew E248563 33.01
194 Forintos, Gyözö V248555 44.84
195 Popovic, Petar248557 21.30
196 Mednis, Edmar J248454 43.19
197 Vladimirov, Evgeny Y248366 23.36
198 Plachetka, Jan248350 35.29
199 Petkevich, Jusefs248270 39.45
200 Zilberstein, Valery I248267 37.13
201 Lukacs, Peter248152 29.89
202 Calvo Minguez, Ricardo248071 36.61
203 Hazai, Laszlo247957 26.96
204 Ghinda, Mihail Viorel247953 30.85
205 Langeweg, Kick247953 43.23
206 Rogulj, Branko247956 28.83
207 Gaprindashvili, Nona247964 39.08
208 Commons, Kim S247968 28.86
209 Rodriguez, Amador247856 23.73
210 Jansa, Vlastimil247650 37.51
211 Ciocaltea, Victor247255 48.37
212 Mnatsakanian, Eduard A247263 41.48
213 Zaichik, Gennady L247262 23.30
214 Hartston, William R247156 32.80
215 Espig, Lutz247151 31.40
216 Jelen, Iztok247161 33.37
217 Ivanovic, Božidar246951 33.77
218 Karner, Hillar246975 44.84
219 Westerinen, Heikki MJ246854 36.09
220 Robatsch, Karl246857 51.63
221 Rajkovic, Dusan246756 37.95
222 Hamann, Svend246765 39.65
223 Borik, Otto246665 32.68
224 Podzielny, Karl Heinz246574 25.72
225 Piesina, Gintautas246569 28.15
226 Vooremaa, Andres246569 35.87
227 Hug, Werner246562 27.72
228 Sahovic, Dragutin246554 39.81
229 Spassov, Liuben246452 37.19
230 Qi Jingxuan246459 32.56
231 Lederman, Leon246469 33.02
232 Hernandez, Roman246455 30.52
233 Cebalo, Mišo246472 35.32
234 Lengyel, Levente246354 46.96
235 Hennings, Artur246365 39.89
236 Ornstein, Axel246355 28.10
237 Bisguier, Arthur B246364 50.65
238 Prandstetter, Eduard246351 31.46
239 Rytov, Boris246368
240 Damjanovic, Mato246358 53.19
241 Messing, Hrvoje246373 39.85
242 Ambroz, Jan246257 25.95
243 Van Wijgerden, Cornelis246256 30.02
244 Szekely, Peter246158 25.31
245 Jakobsen, Ole246156 37.62
246 Kuligowski, Adam246150 24.44
247 Hausner, Ivan246056 28.13
248 Inkiov, Ventzislav246056 24.03
249 Musil, Vojko246067 34.79
250 Ligterink, Gert246050 30.54
251 Ghitescu, Theodor245955 46.35
252 Rath, Ulrik245871 33.43
253 Kaufman, Larry C245766 32.54
254 Szmetan, Jorge245654 30.01
255 Karaklajic, Nikola245670 54.27
256 Raicevic, Vladimir245657 31.08
257 Řgaard, Leif245563 28.40
258 Sisniega, Marcel245560 20.84
259 Garcia, Raimundo245466 44.01
260 Portisch, Ferenc245456 41.14
261 Castro Rojas, Oscar Humberto245357 27.06
262 Honfi, Karoly245265 49.60
263 Karlsson, Lars245154 24.89
264 Bönsch, Uwe245152 21.63
265 Gutman, Lev245065 34.68
266 Planinc, Albin244957 36.12
267 Pytel, Krzysztof244856 35.04
268 Kunsztowicz, Uwe244868 36.37
269 Burger, Karl244868 47.36
270 Rodriguez Vargas, Orestes244760 36.91
271 Sznapik, Aleksander244652 29.31
272 Garcia, Gildardo244563 26.23
273 Schweber, Samuel244558 43.87
274 Mikenas, Vladas244572 70.12
275 Debarnot, Roberto244462 32.82
276 Rukavina, Josip244367 37.51
277 Pomar Salamanca, Arturo244266 48.75
278 Schussler, Harry244252 22.93
279 Mochalov, Evgeny V244169 28.59
280 Chiburdanidze, Maia G244155 19.37
281 Adamski, Jan244051 36.55
282 Gerusel, Mathias244065 42.32
283 Zichichi, Alvise243962 41.91
284 Plaskett, Jim243960 20.20
285 Rubinetti, Jorge A243855 35.17
286 Hansson, Dan243868 27.97
287 Dobosz, Henryk243857 27.20
288 Taulbut, Shaun M243859 22.39
289 Rohde, Michael A243873 20.76
290 Balinas, Rosendo Carrean243863
291 Martinovic, Slobodan243757 34.85
292 Sydor, Andrzej243663 43.41
293 Minev, Nikolay N243566 49.40
294 Meduna, Eduard243557 29.72
295 Mestel, A Jonathan243553 23.22
296 Liebert, Heinz243465 44.02
297 Barle, Janez243458 28.19
298 Dely, Peter243467 45.90
299 Chandler, Murray G243454 20.16
300 Ostojic, Predrag243363 42.28
301 Pétursson, Margeir243356 20.29
302 Groszpeter, Attila243354 19.97
303 Azmaiparashvili, Zurab A243369 20.21
304 Przewoznik, Jan243257 22.71
305 Flesch, Janos243273 46.67
306 Joksic, Sinisa243263 39.64
307 Arnason, Jon L243254 19.55
308 Spiridonov, Nikola243253 42.26
309 Pribyl, Josef243152 32.64
310 Doda, Zbigniew243164 49.28
311 Klaric, Zlatko243166 23.60
312 Wirthensohn, Heinz243062 29.07
313 Garcia Martinez, Silvino243053 35.91
314 Vera, Reynaldo242976 19.40
315 Bohm, Hans242952 30.38
316 Sloth, Jorn242870 35.74
317 Rodriguez, Ruben242861 33.48
318 Bednarski, Jacek B242857 41.22
319 Georgiev, Krum242770 22.02
320 Botterill, George Steven242657
321 Tischbierek, Raj242659 17.69
322 Morris, Walter D242663 21.75
323 Djuric, Stefan242664 24.85
324 Matera, Salvatore Joseph242562
325 Birnboim, Nathan242565 29.51
326 Cramling, Dan242466 21.32
327 Vilela, Jose Luis242456 27.20
328 Kuijpers, Franciscus Antonius242364
329 Trapl, Jindrich242360 38.19
330 Rocha, Antonio242269 35.96
331 Grinberg, Ricardo242175 32.38
332 Haygarth, Michael J242173
333 Ekstroem, Roland242173 24.03
334 Bielczyk, Jacek242154 27.27
335 Brinck Claussen, Bjorn242059
336 Velikov, Petar241969 29.17
337 Tompa, Janos241956 33.09
338 Clemens, Christian241869 39.82
339 Augustin, Josef241856 38.04
340 Cvetkovic, Srdjan241861 34.26
341 Ostermeyer, Peter241771 36.64
342 Bohosjan, Sarkis241766 39.18
343 Harandi, Khosro241760 29.75
344 Bellin, Robert241753 27.92
345 Sideif Sade, Fikret I241671 28.41
346 Duer, Arne241665 20.89
347 Hoelzl, Franz241655 34.15
348 Hase, Juan Carlos241662
349 Webb, Simon241560 30.97
350 Dueckstein, Andreas241465 52.83
351 Short, Nigel D241454 14.99
352 Goodman, David SC241462
353 Ilic, Zoran241367 16.83
354 Franco Ocampos, Zenon241358 24.05
355 Littlewood, John Eric241368
356 Pritchett, Craig William241370
357 Enklaar, Bertus F241264
358 Janoševic, Dragoljub241261 56.90
359 Bellon Lopez, Juan Manuel241158 30.06
360 Strauss, David J241167 33.82
361 Watson, John L241167 28.74
362 Zapata, Alonso241159 21.78
363 Pavlov, Mircea241163 42.71
364 Horner, Jeff241070 30.77
365 Van der Sterren, Paul240952 24.21
366 Hartoch, Robert G240961
367 Jamieson, Robert Murray240865
368 Kestler, Hans-Günter240770 40.47
369 Gruenberg, Hans Ulrich240765 24.39
370 Hoi, Carsten240655 23.37
371 Nicevski, Risto240557 34.92
372 Ciric, Dragoljub M240562 44.55
373 Skrobek, Ryszard240457 28.91
374 Pokojowczyk, Jerzy240455 31.28
375 Kristiansen, Jens240355 28.02
376 Odendahl, Steven M240361 20.60
377 Toth, Bela240360 37.12
378 Wittmann, Walter240363 32.22
379 Cámpora, Daniel H240165 22.92
380 Fedorowicz, John P240154 21.68
381 Haik, Aldo240166 27.62
382 Emma, Jaime J240057 42.37
383 Van Riemsdijk, Herman C240054 31.76
384 Law, Andrew P239968 29.89
385 Mascarinas, Rico239962 27.25
386 Despotovic, Momcilo239864 32.24
387 Cuartas, Carlos239861 39.79
388 Biriescu, Ioan239770 26.60
389 Bouaziz, Slim239758 30.12
390 Iskov, Gert239556 31.84
391 Deze, Anton239574
392 Welin, Thomas239468 20.74
393 Grigorov, Jordan N239364 26.48
394 Hebert, Jean239357 22.55
395 Sibarevic, Milenko239369 35.22
396 Lombard, Andre239266 29.70
397 Huss, Andreas239274 29.63
398 Bronstein, Luis239256 33.99
399 Cording, Harm239269 43.39
400 Balshan, Amikam239161
401 Peev, Peicho Chonev239167 40.16
402 Kagan, Shimon239154 38.15
403 Fedder, Steen239159 28.96
404 Foygel, Igor239172
405 Garcia Padron, Jose239170 22.19
406 Taylor, Timothy239074 27.31
407 Swic, Waldemar238963 27.22
408 De Bruycker, Bernard238773 38.95
409 Segal, Alexandru Sorin238760 32.66
410 Lau, Ralf238766 20.62
411 Cappello, Renato238667
412 Szymczak, Zbigniew238660 28.41
413 Moehring, Guenther238656 43.52
414 Gruchacz, Robert238664 26.50
415 Bojkovic, Slobodan238575 34.85
416 Nikolic, Predrag238569 19.72
417 Ost Hansen, Jacob238474
418 Renman, Nils Gustaf238464
419 Jacobsen, Bo238375 31.47
420 Formanek, Edward W238372 38.07
421 Visier Segovia, Fernando238367 37.33
422 Banas, Jan238255 32.99
423 Coudari, Camille238267 28.84
424 Gonsior, Evzen238157 48.48
425 Lanka, Zigurds238069 20.03
426 Cuasnicu, Oscar238066 37.60
427 Littlewood, Paul E238059 24.37
428 Rigo, Janos238057 31.59
429 Lieb, Harald238068 45.43
430 Henley, Ron W237967 23.49
431 Djukic, Zeljko237871 20.96
432 Horvath, Tamas237863 28.61
433 Whiteley, Andrew J237865 32.97
434 Van der Vliet, Fredrik237760
435 Franklin, Michael J237772 49.33
436 Garcia Palermo, Carlos237662 26.50
437 Soos, Bela237575 50.23
438 Neckar, Lubomir237565 29.83
439 Lanc, Alois237475 32.29
440 Pavlovic, Dejan237371
441 Rajna, George237367 33.30
442 Watzka, Horst237365 41.72
443 Mišta, Ladislav237268 36.58
444 Paehtz, Thomas Sr237163 23.74
445 Szilágyi, György237175 58.91
446 Kaiszauri, Konstanty237155 27.60
447 Helmers, Knut J237065 23.32
448 Andres Mendez, Miguel237069
449 Benjamin, Joel L237061 16.22
450 Nogueiras, Jesus237066 20.87
451 Schinzel, Wladyslaw236851 37.03
452 Rossetto, Héctor D236866 57.73
453 Olafsson, Helgi236759 23.79
454 Kengis, Edvins236773 21.14
455 deFirmian, Nicholas E236766 22.85
456 Rakic, Tomislav236761 45.55
457 Jamroz, Zbigniew236762 45.97
458 Hebden, Mark236664 22.29
459 Niklasson, Christer236557 27.41
460 Danner, Georg236460 33.60
461 Mortensen, Erling236361 25.15
462 Gross, Stefan236259 30.76
463 Root, Douglas236266 17.30
464 Adamski, Andrzej236161 41.38
465 Sapi, Laszlo236167 45.20
466 Nun, Jiri236062 22.84
467 Kelecevic, Nedeljko236070 33.22
468 Fuller, Maxwell L235960 35.34
469 Fries Nielsen, Jens Ove235857 20.27
470 Day, Lawrence A235870 31.33
471 Trois, Francisco RT235753
472 Filipowicz, Andrzej235764 42.05
473 Sikora Lerch, Jan235754
474 Sharif, Mershad235771 27.89
475 Ionescu, Constantin235667 21.72
476 Rantanen, Yrjo A235563 30.11
477 Wahlbom, Magnus235473 35.04
478 Orso, Miklos235459 23.97
479 Angantysson, Haukur235362 31.50
480 Cooper, John Grantley235370
481 Petran, Pal235356 33.71
482 Barreras, Alberto235165 29.15
483 Holm, Sejer235165 40.81
484 Basman, Michael J235166 34.21
485 Lekander, Rolf235065 33.41
486 Mihaljcisin, Mihajlo235073 47.28
487 Lebredo, Gerardo234962 29.83
488 Frias, Victor J234966 24.31
489 Gutierrez, Jose Antonio234861
490 Maciejewski, Andrzej234564 28.89
491 Braga, Fernando234461 21.89
492 Baljon, Christofoor234459 26.93
493 Ardiansyah, Haji234366 28.49
494 Ristic, Nenad234365 21.53
495 Kovacs, Laszlo M234258 41.65
496 Tichy, Vladimir234170 33.66
497 Filguth, Rubens A234064 24.19
498 Svensson, Bengt234076 19.90
499 Hvenekilde, Jorgen234067 44.76
500 Witkowski, Stefan233963 48.68

These ratings, calculated as of May 31, 1980, incorporate all games (against rated opponents) played in the time between May 1, 1979 and May 31, 1980, along with the ratings that were already calculated as of April 30, 1979. 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 May 31, 1980. This represents the player's estimated strength on June 1, 1980.

+/- 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 June 1, 1980. The +/- value represents the standard deviation of that estimate; the player's true strength on June 1, 1980 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 June 1, 1980. 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 May 31, 1980. 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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