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Top 10 active players as of November 30, 1980


Top 500 active players as of November 30, 1980

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E27904948.0% #329.52
2 Korchnoi, Viktor L27595021.1% #649.69
3 Portisch, Lajos2718495.3% #1643.65
4 Kasparov, Garry K2713515.2% #1717.63
5 Polugaevsky, Lev A2708503.6% #1946.03
6 Spassky, Boris V2692491.9% #2543.83
7 Geller, Efim P2690511.9% #2755.74
8 Timman, Jan H2688471.3% #2728.95
9 Beliavsky, Alexander G2677490.9% #3326.95
10 Hübner, Robert2676491.0% #3332.07
11 Romanishin, Oleg M2676490.8% #3328.89
12 Tal, Mikhail2672490.7% #3644.06
13 Petrosian, Tigran V2672500.8% #3651.45
14 Larsen, Bent2662480.4% #4145.74
15 Andersson, Ulf2661480.3% #4229.43
16 Balashov, Yury S2660490.4% #4331.72
17 Mecking, Henrique2658712.3% #5528.85
18 Ljubojevic, Ljubomir2652490.2% #4830.08
19 Gulko, Boris F2646550.4% #5533.81
20 Miles, Anthony J2646480.1% #5225.60
21 Vaganian, Rafael A2643490.1% #5529.12
22 Hort, Vlastimil2638470.1% #5736.88
23 Jussupow, Artur M2638520.1% #6120.80
24 Gufeld, Eduard E2635550.1% #6444.70
25 Lerner, Konstantin Z2634540.1% #6530.76
26 Tseshkovsky, Vitaly V2633490.1% #6236.18
27 Sosonko, Gennadi2632490.1% #6437.53
28 Ribli, Zoltán2631500.1% #6429.23
29 Vasiukov, Evgeny A2629580.3% #7047.73
30 Dolmatov, Sergey V2624520.1% #7221.78
31 Sveshnikov, Evgeny E262450 #7030.80
32 Kholmov, Ratmir D2622570.1% #7655.55
33 Savon, Vladimir A2619560.1% #7840.18
34 Kuzmin, Gennady P261951 #7634.86
35 Mikhalchishin, Adrian B2617520.1% #7726.03
36 Psakhis, Lev B2617600.2% #8222.00
37 Makarichev, Sergey Y2617530.1% #7827.04
38 Sax, Gyula261749 #7629.45
39 Gheorghiu, Florin261450 #7936.65
40 Panchenko, Alexander N261454 #8127.15
41 Kochiev, Alexander2614560.1% #8324.68
42 Kupreichik, Viktor D2612530.1% #8331.41
43 Rashkovsky, Nukhim N261152 #8334.62
44 Dzindzichashvili, Roman Y261054 #8536.57
45 Dvoretsky, Mark I2609680.3% #9432.97
46 Unzicker, Wolfgang2608560.1% #8755.43
47 Ivkov, Borislav260750 #8547.05
48 Dorfman, Iosif D260652 #8728.58
49 Razuvaev, Yury S260552 #8835.14
50 Smyslov, Vassily V260352 #9059.68
51 Georgadze, Tamaz V260352 #9033.06
52 Eingorn, Viacheslav S2603590.1% #9524.01
53 Parma, Bruno2602570.1% #9338.91
54 Palatnik, Semen A2600650.1% #10130.68
55 Gipslis, Aivars2598650.1% #10343.81
56 Bagirov, Vladimir K259854 #9644.29
57 Kurajica, Bojan259853 #9633.04
58 Smejkal, Jan259749 #9434.69
59 Alburt, Lev O259752 #9635.27
60 Browne, Walter S259349 #9831.89
61 Kavalek, Lubomir259250 #10037.31
62 Seirawan, Yasser259150 #10020.68
63 Gligoric, Svetozar258750 #10457.83
64 Liberzon, Vladimir M258651 #10543.69
65 Nunn, John D M258650 #10525.60
66 Tarjan, James E258656 #10928.77
67 Bronstein, David I258357 #11256.78
68 Evans, Larry M258063 #11948.69
69 Yurtaev, Leonid258062 #11921.58
70 Taimanov, Mark E257960 #11854.81
71 Petrosian, Arshak B257860 #11926.95
72 Adorján, András257750 #11330.66
73 Szabó, László257764 #12363.70
74 Vitolinš, Alvis257358 #12334.46
75 Tukmakov, Vladimir B257252 #11934.71
76 Ftácnik, Lubomír257151 #12023.08
77 Olafsson, Fridrik257055 #12445.84
78 Matanovic, Aleksandar256964 #13150.52
79 Darga, Klaus V256665 #13346.77
80 Ivanov, Igor V2565720.1% #13833.89
81 Panno, Oscar R256451 #12645.70
82 Quinteros, Miguel A256350 #12732.92
83 Byrne, Robert E256151 #13052.61
84 Kapengut, Albert Z256168 #14036.40
85 Nemet, Ivan256156 #13237.63
86 Pachmann, Ludek255758 #13856.55
87 Kharitonov, Andrey Y255760 #13821.65
88 Lombardy, William J255657 #13742.98
89 Tseitlin, Mikhail S255556 #13733.45
90 Stean, Michael F255549 #13427.24
91 Antoshin, Vladimir S255460 #14151.54
92 Najdorf, Miguel255253 #13870.62
93 Speelman, Jonathan S255150 #13824.16
94 Torre, Eugenio255150 #13829.07
95 Grigorian, Karen A255054 #14133.23
96 Matulovic, Milan254962 #14645.47
97 Pintér, József254954 #14227.06
98 Filip, Miroslav254868 #15152.09
99 Tringov, Georgy P254857 #14543.73
100 Chekhov, Valery A254868 #15125.01
101 Timoshchenko, Gennady254757 31.59
102 Lein, Anatoly254652 49.67
103 Veingold, Aleksander254468 27.14
104 Faragó, Iván254449 34.66
105 Bukic, Enver254357 42.99
106 Kovacevic, Vladimir254356 38.68
107 Knaak, Rainer F254250 27.70
108 Csom, István254250 40.49
109 Nei, Iivo253965 49.08
110 Ubilava, Elizbar E253966 30.26
111 Nikolac, Juraj253756 48.61
112 Suetin, Alexey S253656 54.04
113 Peresipkin, Vladimir253567
114 Rogoff, Kenneth S253461 27.69
115 Kaplan, Julio P253260 30.35
116 Vukic, Milan253255 37.28
117 Uhlmann, Wolfgang253251 45.67
118 Pfleger, Helmut253258 37.32
119 Ivanov, Alexander V253256 24.58
120 Gruenfeld, Yehuda253056 24.76
121 Lputian, Smbat G253056 22.79
122 Zaltsman, Vitaly F252857 39.09
123 Reshevsky, Samuel H252860 69.01
124 van der Wiel, John T H252750 21.31
125 Lukin, Andrei M252570 32.26
126 Anikaev, Yury252558 32.42
127 Ree, Hans252550 36.21
128 Shamkovich, Leonid A252452 57.50
129 Chernin, Alexander M252372 20.73
130 Keene, Raymond252253
131 Zaitsev, Igor A252254 42.51
132 Klovans, Janis252161 45.64
133 Weinstein, Norman252168 30.15
134 Piasetski, Leon David252075
135 Stoica, Valentin251962 30.79
136 Vogt, Lothar H251949 28.87
137 Magerramov, Elmar S251958 22.64
138 Biyiasas, Peter251952 30.03
139 Murey, Yakov251971 39.33
140 Schneider, Lars Ake251955
141 Popov, Luben251857 44.84
142 Marjanovic, Slavoljub251552 25.90
143 Radulov, Ivan251456 41.90
144 Bleiman, Yaacov251466 33.23
145 Vokác, Marek251458 21.98
146 Moiseev, Oleg L251472 55.57
147 Tatai, Stefano251357 42.69
148 Kakageldyev, Amanmurad251371 30.92
149 Schmidt, Wlodzimierz251350 37.64
150 Christiansen, Larry M251352 24.43
151 Díez del Corral, Jesús251262 47.65
152 Velimirovic, Dragoljub251253 38.55
153 Knezevic, Milorad251253 44.08
154 Malich, Burkhard G251259 44.00
155 Lutikov, Anatoly S251164 47.82
156 Gurgenidze, Bukhuti I251071 47.05
157 Donner, Johannes H251057 53.40
158 Suba, Mihai250953 33.50
159 Ermenkov, Evgenij250952 31.17
160 Marangunic, Srdjan250967 37.08
161 Makropoulos, Georgios250760 27.17
162 Benko, Pal C250759 52.37
163 Peters, John A250655 29.80
164 Petrushin, Alexander I250667 33.72
165 Mnatsakanian, Eduard A250559 41.98
166 Agzamov, Georgy T250561 26.23
167 Sturua, Zurab250265 21.48
168 Kraidman, Yair250264 48.08
169 Barczay, Laszlo250252 44.77
170 Langeweg, Kick250153 43.73
171 Luczak, Andrzej250154 31.98
172 Kirov Ivanov, Nino250154 35.22
173 Popovic, Petar250057 21.79
174 Zilberstein, Valery I250069 37.63
175 Ungureanu, Emil249872 44.08
176 Jansson, Borje249872 38.72
177 Bilek, István249767 48.30
178 Vorotnikov, Vladislav V249767 33.29
179 Polovodin, Igor A249668 25.69
180 Ghinda, Mihail Viorel249555 31.35
181 Vladimirov, Evgeny Y249367 23.86
182 Plachetka, Jan249249 35.78
183 Lukacs, Peter249152 30.39
184 Padevsky, Nikola B249059 47.50
185 Regan, Kenneth249064 21.21
186 García Gonzáles, Guillermo248956 26.97
187 Hulak, Krunoslav248964 29.51
188 Kuligowski, Adam248952 24.93
189 Platonov, Igor V248861 46.87
190 Marovic, Dražen248762 42.88
191 Minic, Dragoljub248771 43.73
192 Hecht, Hans-Joachim248662 41.84
193 Grefe, John A248665 33.23
194 Soltis, Andrew E248568 33.51
195 Zaichik, Gennady L248563 23.80
196 Mednis, Edmar J248557 43.69
197 Wedberg, Tom248454 27.01
198 Hazai, Laszlo248457 27.46
199 Lechtynsky, Jiri248453 33.01
200 Mariotti, Sergio248358 34.30
201 Sigurjónsson, Gudmundur248353 33.18
202 Karlsson, Lars248252 25.38
203 Robatsch, Karl248258 52.13
204 Ciocaltea, Victor248255 48.87
205 Commons, Kim S248274 29.35
206 Gaprindashvili, Nona248264 39.57
207 Rogulj, Branko248256 29.33
208 Petkevich, Jusefs248170 39.94
209 Sunye Neto, Jaime248153 23.58
210 Zuckerman, Bernard248172 37.66
211 Musil, Vojko248169 35.28
212 Řgaard, Leif248163 28.90
213 Ornstein, Axel247854 28.60
214 Ivanovic, Božidar247752 34.27
215 Hermann, Manfred247775 38.25
216 Sahovic, Dragutin247756 40.31
217 Rodriguez, Amador247558 24.23
218 Forintos, Gyözö V247557 45.33
219 Inkiov, Ventzislav247556 24.53
220 Piesina, Gintautas247575 28.64
221 Diesen, Mark C247560
222 Damjanovic, Mato247363 53.69
223 Portisch, Ferenc247255 41.64
224 Gavrikov, Victor N247263 23.34
225 Lederman, Leon247168 33.51
226 Karaklajic, Nikola247170 54.77
227 Bradford, Joseph M247063 30.08
228 Rytov, Boris247069
229 Georgiev, Krum246964 22.52
230 Spassov, Liuben246951 37.69
231 Schweber, Samuel246859 44.37
232 Vooremaa, Andres246869 36.36
233 Van Wijgerden, Cornelis246756 30.52
234 Hamann, Svend246767 40.14
235 Hartston, William R246656 33.30
236 Espig, Lutz246552 31.90
237 Podzielny, Karl Heinz246562 26.22
238 Cebalo, Mišo246572 35.82
239 Feustel, Bernd246570 26.19
240 Jelen, Iztok246568 33.86
241 Szekely, Peter246559 25.81
242 Vadasz, Laszlo246453 32.84
243 Birnboim, Nathan246463 30.01
244 Bisguier, Arthur B246459 51.14
245 Bohm, Hans246451 30.87
246 Mestel, A Jonathan246452 23.71
247 Jansa, Vlastimil246350 38.01
248 Hennings, Artur246365 40.38
249 Hausner, Ivan246356 28.62
250 Raicevic, Vladimir246257 31.58
251 Gutman, Lev246268 35.18
252 Qi Jingxuan246163 33.06
253 Chiburdanidze, Maia G246154 19.87
254 Hernandez, Roman246058 31.02
255 Lengyel, Levente245955 47.46
256 Myagmarsuren, Lhamsuren245975 42.79
257 Jakobsen, Ole245856 38.11
258 Prandstetter, Eduard245852 31.95
259 Ligterink, Gert245850 31.04
260 Rajkovic, Dusan245857 38.45
261 Messing, Hrvoje245773 40.34
262 Zapata, Alonso245758 22.27
263 Kaufman, Larry C245566 33.04
264 Lakic, Nikola245567 33.37
265 Cramling, Dan245562 21.82
266 Schussler, Harry245553 23.43
267 Ambroz, Jan245355 26.45
268 Bönsch, Uwe245353 22.12
269 Chandler, Murray G245253 20.65
270 Ghitescu, Theodor245255 46.85
271 Szmetan, Jorge245256 30.51
272 Pétursson, Margeir245255 20.79
273 Zichichi, Alvise245262 42.40
274 Castro Rojas, Oscar Humberto245258 27.56
275 Jamieson, Robert Murray245167
276 Honfi, Karoly245168 50.10
277 Adamski, Jan245152 37.05
278 Garcia, Raimundo245066 44.51
279 Garcia, Gildardo245061 26.72
280 Hug, Werner245058 28.22
281 Mochalov, Evgeny V245069 29.09
282 Sideif Sade, Fikret I244958 28.91
283 Velikov, Petar244867 29.67
284 Duer, Arne244865 21.39
285 Gerusel, Mathias244765 42.82
286 Krnic, Zdenko244674 33.16
287 Planinc, Albin244559 36.62
288 Arnason, Jon L244552 20.05
289 Cámpora, Daniel H244563 23.42
290 Rodriguez Vargas, Orestes244460 37.40
291 Rukavina, Josip244371 38.00
292 Spiridonov, Nikola244254 42.76
293 Westerinen, Heikki MJ244153 36.59
294 Dely, Peter244069 46.40
295 Taulbut, Shaun M244058 22.88
296 Debarnot, Roberto243961 33.32
297 Doda, Zbigniew243964 49.77
298 Ostojic, Predrag243864 42.77
299 Liebert, Heinz243767 44.52
300 Pomar Salamanca, Arturo243766 49.25
301 Pytel, Krzysztof243657 35.54
302 Haik, Aldo243564 28.11
303 Sydor, Andrzej243562 43.91
304 Kestler, Hans-Günter243570 40.96
305 Borik, Otto243562 33.18
306 Azmaiparashvili, Zurab A243469 20.70
307 Kunsztowicz, Uwe243464 36.87
308 Svensson, Bengt243274 20.40
309 Clemens, Christian243267 40.32
310 Joksic, Sinisa243263 40.14
311 Balinas, Rosendo Carrean243165
312 Pribyl, Josef243152 33.13
313 Tompa, Janos243157 33.58
314 Matera, Salvatore Joseph243164
315 Brinck Claussen, Bjorn243059
316 Martinovic, Slobodan242858 35.35
317 Botterill, George Steven242860
318 Wirthensohn, Heinz242861 29.57
319 Toth, Bela242859 37.61
320 Kristiansen, Jens242754 28.51
321 Rodriguez, Ruben242768 33.97
322 Klaric, Zlatko242767 24.10
323 Barle, Janez242762 28.69
324 Groszpeter, Attila242754 20.47
325 Hansson, Dan242669 28.47
326 Wockenfuss, Klaus242568 29.25
327 Bednarski, Jacek B242560 41.72
328 Kuijpers, Franciscus Antonius242463
329 Meduna, Eduard242458 30.22
330 Sisniega, Marcel242466 21.34
331 Sznapik, Aleksander242451 29.80
332 Tischbierek, Raj242358 18.18
333 Bukal, Vladimir Sr242365 41.08
334 Rubinetti, Jorge A242155 35.66
335 Cvetkovic, Srdjan242164 34.76
336 Plaskett, Jim242164 20.70
337 Ostermeyer, Peter242074 37.13
338 Augustin, Josef242057 38.53
339 Burger, Karl242067 47.86
340 Ioseliani, Nana242063 18.80
341 Hoelzl, Franz242056 34.65
342 Trapl, Jindrich242060 38.68
343 Webb, Simon242062 31.47
344 Garcia Martinez, Silvino241955 36.40
345 Bohosjan, Sarkis241968 39.68
346 Rocha, Antonio241867 36.46
347 Harandi, Khosro241767 30.25
348 Nikolic, Predrag241767 20.22
349 Vilela, Jose Luis241755 27.70
350 Fedder, Steen241658 29.46
351 Cuartas, Carlos241660 40.29
352 Ilic, Zoran241667 17.33
353 Pokojowczyk, Jerzy241654 31.77
354 Pavlov, Mircea241563 43.21
355 Pritchett, Craig William241564
356 Rohde, Michael A241472 21.26
357 Minev, Nikolay N241465 49.89
358 Djuric, Stefan241363 25.34
359 Ciric, Dragoljub M241365 45.05
360 Tomaszewski, Roman241357 20.54
361 Rantanen, Yrjo A241361 30.60
362 Van der Sterren, Paul241253 24.70
363 Franco Ocampos, Zenon241158 24.55
364 deFirmian, Nicholas E241061 23.34
365 Lobron, Eric241063 20.56
366 Bielczyk, Jacek240954 27.77
367 Morris, Walter D240959 22.24
368 Bellin, Robert240954 28.42
369 Nogueiras, Jesus240863 21.37
370 Dueckstein, Andreas240871 53.33
371 Enklaar, Bertus F240864
372 Watson, John L240869 29.23
373 Balshan, Amikam240763
374 Hase, Juan Carlos240663
375 Janoševic, Dragoljub240663 57.39
376 Wittmann, Walter240671 32.71
377 Dobosz, Henryk240554 27.69
378 Renman, Nils Gustaf240462
379 Bergstrom, Christer240476 22.18
380 Swic, Waldemar240365 27.72
381 Littlewood, Paul E240362 24.87
382 Fedorowicz, John P240255 22.18
383 Hartoch, Robert G240262
384 Vera, Reynaldo240173 19.90
385 Lombard, Andre240174 30.20
386 Welin, Thomas240165 21.23
387 Strauss, David J240168 34.31
388 Gonsior, Evzen240161 48.98
389 Gruenberg, Hans Ulrich240066 24.89
390 Law, Andrew P240073 30.39
391 Lau, Ralf240064 21.11
392 Henley, Ron W239965 23.98
393 Peev, Peicho Chonev239971 40.66
394 Gruchacz, Robert239965 26.99
395 Cappello, Renato239867
396 Garcia Padron, Jose239676 22.69
397 Franklin, Michael J239565 49.83
398 Skrobek, Ryszard239557 29.40
399 Emma, Jaime J239559 42.87
400 Bouaziz, Slim239563 30.62
401 Lanka, Zigurds239469 20.52
402 Vaisman, Volodia239475 42.92
403 Iskov, Gert239355 32.34
404 Nicevski, Risto239360 35.42
405 Short, Nigel D239355 15.50
406 Grigorov, Jordan N239265 26.97
407 Rumens, David E239267 41.19
408 Jacobsen, Bo239175 31.96
409 Sloth, Jorn239163 36.23
410 Coudari, Camille239166 29.34
411 Goodman, David SC239063
412 Despotovic, Momcilo239069 32.74
413 Kagan, Shimon239056 38.65
414 Przewoznik, Jan239056 23.20
415 Taylor, Timothy238974 27.81
416 Kaiszauri, Konstanty238956 28.10
417 Visier Segovia, Fernando238873 37.82
418 Van Riemsdijk, Herman C238857 32.26
419 Wahlbom, Magnus238871 35.54
420 Rigo, Janos238857 32.09
421 Garcia Palermo, Carlos238860 26.99
422 Bronstein, Luis238759 34.49
423 Sibarevic, Milenko238668 35.72
424 Hoi, Carsten238655 23.87
425 Banas, Jan238654 33.49
426 Foygel, Igor238672
427 Helmers, Knut J238562 23.81
428 Lanc, Alois238475 32.78
429 Borm, Franciscus WM238461
430 Moehring, Guenther238457 44.01
431 Hansen, Curt238469 16.20
432 Szymczak, Zbigniew238367 28.90
433 Brondum, Eric238265 38.95
434 Segal, Alexandru Sorin238259 33.15
435 Rogers, Ian238268 20.43
436 Basman, Michael J238166 34.70
437 Cording, Harm238066 43.89
438 Hebert, Jean238059 23.05
439 Horvath, Tamas238064 29.10
440 Adamski, Andrzej237960 41.88
441 Lieb, Harald237865 45.92
442 Schiffer, Karl Josef237872
443 Rajna, George237669 33.79
444 Benjamin, Joel L237661 16.72
445 Bellon Lopez, Juan Manuel237657 30.56
446 Schinzel, Wladyslaw237653 37.52
447 Neckar, Lubomir237665 30.33
448 Akesson, Ralf237665 19.81
449 Frias, Victor J237568 24.80
450 Mascarinas, Rico237567 27.74
451 Djukic, Zeljko237571 21.47
452 Van der Vliet, Fredrik237460
453 Odendahl, Steven M237462 21.10
454 Cuasnicu, Oscar237466 38.10
455 Pavlovic, Dejan237371
456 Angantysson, Haukur237361 31.99
457 De Bruycker, Bernard237370 39.46
458 Flear, Glenn C237367 21.80
459 Andres Mendez, Miguel237370
460 Whiteley, Andrew J237268 33.47
461 Mišta, Ladislav237268 37.08
462 Paehtz, Thomas Sr237163 24.24
463 Rossetto, Héctor D237165 58.23
464 Scheeren, Peter237158 25.33
465 Biriescu, Ioan237069 27.09
466 Soos, Bela237072 50.73
467 Rosenlund, Thorbjorn237075 29.45
468 Jamroz, Zbigniew236971 46.47
469 Ost Hansen, Jacob236872
470 Filguth, Rubens A236865 24.68
471 Mortensen, Erling236756 25.65
472 Fuller, Maxwell L236756 35.84
473 Goehring, Karl Heinz236768
474 Fries Nielsen, Jens Ove236655 20.77
475 Ristic, Nenad236571 22.03
476 Olafsson, Helgi236557 24.29
477 Sapi, Laszlo236568 45.69
478 Kastner, Jeffrey236573 30.88
479 Bojkovic, Slobodan236475 35.34
480 Danner, Georg236360 34.09
481 Shirazi, Kamran G236271 28.02
482 Sikora Lerch, Jan236154
483 Petran, Pal236057 34.21
484 Root, Douglas236066 17.80
485 Hess, Ralf236061 36.68
486 Lekander, Rolf236065 33.91
487 Cooper, John Grantley235970
488 Nun, Jiri235962 23.34
489 Filipowicz, Andrzej235966 42.55
490 Kengis, Edvins235871 21.63
491 Giffard, Nicolas235869 30.15
492 Roos, Louis235874 22.97
493 Watzka, Horst235774 42.21
494 Ionescu, Constantin235767 22.22
495 Szilágyi, György235764 59.40
496 Orso, Miklos235659 24.48
497 Kelecevic, Nedeljko235570 33.72
498 Trois, Francisco RT235555
499 Gross, Stefan235359 31.26
500 Giardelli, Sergio C235256 25.43

These ratings, calculated as of November 30, 1980, incorporate all games (against rated opponents) played in the time between November 1, 1979 and November 30, 1980, along with the ratings that were already calculated as of October 31, 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 November 30, 1980. This represents the player's estimated strength on December 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 December 1, 1980. The +/- value represents the standard deviation of that estimate; the player's true strength on December 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 December 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 November 30, 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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