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Top 10 active players as of October 31, 1979


Top 500 active players as of October 31, 1979

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E27955050.0% #328.44
2 Korchnoi, Viktor L27624921.4% #548.61
3 Tal, Mikhail27484914.0% #742.97
4 Portisch, Lajos2704502.9% #1842.57
5 Polugaevsky, Lev A2697492.0% #2044.94
6 Petrosian, Tigran V2692491.8% #2250.37
7 Spassky, Boris V2683501.2% #2642.75
8 Timman, Jan H2668480.5% #3327.87
9 Tseshkovsky, Vitaly V2666500.5% #3535.10
10 Hübner, Robert2657490.3% #4030.98
11 Mecking, Henrique2648630.9% #5227.77
12 Vaganian, Rafael A2647500.2% #4728.04
13 Kasparov, Garry K2647540.3% #4916.55
14 Geller, Efim P2646510.2% #4854.66
15 Larsen, Bent2645490.1% #4844.66
16 Ribli, Zoltán2641500.1% #5128.15
17 Romanishin, Oleg M2641490.1% #5227.81
18 Smyslov, Vassily V2641510.1% #5258.60
19 Hort, Vlastimil2640480.1% #5035.80
20 Vasiukov, Evgeny A2639560.3% #5646.65
21 Ljubojevic, Ljubomir2639490.1% #5228.99
22 Lerner, Konstantin Z2638570.3% #5729.67
23 Sveshnikov, Evgeny E2638500.1% #5329.72
24 Balashov, Yury S2637500.1% #5430.63
25 Gulko, Boris F2637510.1% #5532.73
26 Andersson, Ulf2636480.1% #5428.34
27 Gheorghiu, Florin2636500.1% #5535.57
28 Beliavsky, Alexander G2634510.1% #5625.87
29 Tukmakov, Vladimir B2633510.1% #5733.63
30 Kholmov, Ratmir D2622560.2% #6954.47
31 Savon, Vladimir A2621540.1% #7039.10
32 Dolmatov, Sergey V2616570.1% #7620.70
33 Kavalek, Lubomir261351 #7436.23
34 Unzicker, Wolfgang2611560.1% #7854.35
35 Kudriashov, Anatoly A2608730.4% #9137.54
36 Sax, Gyula260649 #8028.37
37 Kuzmin, Gennady P260549 #8133.78
38 Rashkovsky, Nukhim N2605570.1% #8533.54
39 Kochiev, Alexander260552 #8223.60
40 Dvoretsky, Mark I2605640.2% #8931.89
41 Smejkal, Jan260549 #8033.61
42 Gligoric, Svetozar260450 #8256.74
43 Gufeld, Eduard E260356 #8643.62
44 Dorfman, Iosif D260151 #8527.50
45 Bronstein, David I260054 #8855.70
46 Bagirov, Vladimir K259751 #8943.21
47 Razuvaev, Yury S259452 #9134.06
48 Palatnik, Semen A2594610.1% #9829.60
49 Sanguinetti, Raúl C2593680.1% #10346.74
50 Kurajica, Bojan259254 #9631.95
51 Liberzon, Vladimir M259254 #9642.61
52 Panno, Oscar R259052 #9644.62
53 Sosonko, Gennadi258949 #9536.45
54 Dzindzichashvili, Roman Y258953 #9835.49
55 Gipslis, Aivars258958 #10142.73
56 Browne, Walter S258850 #9630.81
57 Parma, Bruno258556 #10237.83
58 Mikhalchishin, Adrian B258553 #10124.95
59 Psakhis, Lev B258458 #10620.92
60 Antoshin, Vladimir S2582690.1% #11550.46
61 Chekhov, Valery A2580680.1% #11523.92
62 Szabó, László257968 #11762.62
63 Ivkov, Borislav257951 #10545.96
64 Miles, Anthony J257748 #10524.52
65 Olafsson, Fridrik257754 #10944.76
66 Makarichev, Sergey Y257654 #11025.95
67 Georgadze, Tamaz V257553 #11131.97
68 Ivanov, Igor V257365 #12132.81
69 Zakharov, Alexander V2572700.1% #12536.06
70 Tarjan, James E256953 #11627.69
71 Adorján, András256949 #11329.58
72 Grigorian, Karen A256756 #12032.15
73 Taimanov, Mark E256456 #12353.73
74 Uhlmann, Wolfgang256451 #12044.59
75 Vokác, Marek2564730.1% #13420.89
76 Tringov, Georgy P256363 #12942.65
77 Alburt, Lev O256354 #12334.19
78 Luczak, Andrzej256254 #12430.90
79 Csom, István256150 #12239.41
80 Byrne, Robert E256052 #12551.53
81 Suetin, Alexey S256057 #12852.95
82 Lein, Anatoly256051 #12448.59
83 Matanovic, Aleksandar255957 #12849.44
84 Darga, Klaus V255863 #13345.69
85 Pachmann, Ludek255757 #13055.47
86 Kupreichik, Viktor D255756 #13030.33
87 Lombardy, William J255655 #13041.90
88 Knaak, Rainer F255650 #12726.62
89 Nemet, Ivan255558 #13336.55
90 Tseitlin, Mikhail S255454 #13132.37
91 Pfleger, Helmut255356 #13336.23
92 Zaitsev, Igor A255258 #13541.43
93 Panchenko, Alexander N255157 #13626.07
94 Zaltsman, Vitaly F255071 #14538.01
95 Rogoff, Kenneth S254862 #14126.61
96 Timoshchenko, Gennady254752 #13630.51
97 Nikolac, Juraj254454 #14047.52
98 Veingold, Aleksander254361 #14526.06
99 Anikaev, Yury254362 #14631.34
100 Bukic, Enver254254 #14241.91
101 Yurtaev, Leonid254260 20.50
102 Evans, Larry M254068 47.61
103 Matulovic, Milan254056 44.39
104 Vogt, Lothar H254049 27.79
105 Kapengut, Albert Z253962 35.32
106 Filip, Miroslav253961 51.01
107 Klovans, Janis253764 44.56
108 Reshevsky, Samuel H253757 67.92
109 Najdorf, Miguel253654 69.54
110 Ree, Hans253549 35.13
111 Platonov, Igor V253569 45.79
112 Stean, Michael F253451 26.16
113 Shamkovich, Leonid A253352 56.41
114 Petrushin, Alexander I253369 32.64
115 Knezevic, Milorad253252 42.99
116 Nei, Iivo253058 47.99
117 Vitolinš, Alvis252858 33.38
118 Torre, Eugenio252751 27.98
119 Peresipkin, Vladimir252660
120 Gruenfeld, Yehuda252456 23.67
121 Ubilava, Elizbar E252371 29.18
122 Kaplan, Julio P252160 29.27
123 Vukcevich, Milan R252075
124 Velimirovic, Dragoljub252052 37.47
125 Quinteros, Miguel A251950 31.84
126 Hecht, Hans-Joachim251867 40.76
127 Petrosian, Arshak B251762 25.87
128 Sigurjónsson, Gudmundur251753 32.10
129 Jussupow, Artur M251756 19.72
130 Faibisovich, Vadim Z251575 35.48
131 Ivanov, Alexander V251558 23.50
132 Benko, Pal C251458 51.29
133 Nunn, John D M251454 24.52
134 Schneider, Lars Ake251456
135 Grefe, John A251364 32.15
136 Kovacevic, Vladimir251360 37.60
137 Wedberg, Tom251357 25.92
138 Lukin, Andrei M251370 31.17
139 Díez del Corral, Jesús251360 46.57
140 van der Wiel, John T H251256 20.23
141 Weinstein, Norman251161 29.07
142 Piasetski, Leon David251066
143 Gurgenidze, Bukhuti I251067 45.96
144 Bleiman, Yaacov251070 32.15
145 Lputian, Smbat G250960 21.71
146 Mariotti, Sergio250957 33.22
147 Biyiasas, Peter250855 28.94
148 Averkin, Orest N250868 35.68
149 Radulov, Ivan250855 40.81
150 Hulak, Krunoslav250661 28.43
151 Stoica, Valentin250668 29.71
152 Yuferov, Sergey N250672 33.90
153 Faragó, Iván250549 33.58
154 Regan, Kenneth250561 20.13
155 Vukic, Milan250554 36.20
156 Moiseev, Oleg L250464 54.48
157 Kakageldyev, Amanmurad250463 29.84
158 Zhuravliov, Valerij250373 40.88
159 Malich, Burkhard G250254 42.92
160 Lutikov, Anatoly S250158 46.74
161 Marangunic, Srdjan249960 35.99
162 Kharitonov, Andrey Y249972 20.57
163 Pintér, József249855 25.97
164 Peters, John A249756 28.72
165 Ftácnik, Lubomír249353 22.00
166 Keene, Raymond249353
167 Ungureanu, Emil249266 42.99
168 Rodriguez, Amador249255 23.15
169 Schmidt, Wlodzimierz249253 36.56
170 Zilberstein, Valery I249061 36.55
171 Marjanovic, Slavoljub249052 24.82
172 Inkiov, Ventzislav249057 23.45
173 Hartston, William R248953 32.22
174 Jansson, Borje248970 37.63
175 Diesen, Mark C248856
176 Christiansen, Larry M248852 23.34
177 Bilek, István248860 47.22
178 Forintos, Gyözö V248857 44.25
179 Donner, Johannes H248754 52.32
180 Seirawan, Yasser248763 19.60
181 Rajkovic, Dusan248756 37.37
182 Prandstetter, Eduard248654 30.87
183 Ciocaltea, Victor248657 47.79
184 Ghinda, Mihail Viorel248653 30.27
185 Simic, Radoslav248668 31.39
186 Ermenkov, Evgenij248554 30.09
187 Sunye Neto, Jaime248455 22.49
188 Calvo Minguez, Ricardo248170 36.02
189 Suba, Mihai248153 32.41
190 Lengyel, Levente248053 46.38
191 Bisguier, Arthur B248061 50.06
192 Gavrikov, Victor N247864 22.26
193 Tatai, Stefano247855 41.61
194 Marovic, Dražen247856 41.80
195 Lederman, Leon247769 32.43
196 Barczay, Laszlo247651 43.69
197 Soltis, Andrew E247661 32.42
198 García Gonzáles, Guillermo247553 25.89
199 Speelman, Jonathan S247554 23.08
200 Gaprindashvili, Nona247458 38.49
201 Jansa, Vlastimil247451 36.92
202 Piesina, Gintautas247466 27.56
203 Commons, Kim S247365 28.27
204 Kirov Ivanov, Nino247254 34.14
205 Popov, Luben247256 43.76
206 Petkevich, Jusefs247262 38.86
207 Zuckerman, Bernard247164 36.58
208 Lechtynsky, Jiri247056 31.93
209 Padevsky, Nikola B246963 46.42
210 Plachetka, Jan246950 34.70
211 Sofrevski, Jovan246871 44.20
212 Nikolic, Zivoslav246671 25.88
213 Westerinen, Heikki MJ246553 35.51
214 Kraidman, Yair246564 46.99
215 Jelen, Iztok246461 32.78
216 Karner, Hillar246368 44.26
217 Szekely, Peter246360 24.73
218 Damjanovic, Mato246357 52.61
219 Podzielny, Karl Heinz246373 25.14
220 Ligterink, Gert246251 29.95
221 Van Wijgerden, Cornelis246259 29.44
222 Karaklajic, Nikola246162 53.69
223 Mednis, Edmar J246155 42.61
224 Rytov, Boris246061
225 Rath, Ulrik246071 32.84
226 Hazai, Laszlo246057 26.38
227 Martinovic, Slobodan246063 34.27
228 Vadasz, Laszlo245954 31.76
229 Mnatsakanian, Eduard A245960 40.89
230 Podgaets, Mikhail Y245975 32.27
231 Vooremaa, Andres245862 35.28
232 Robatsch, Karl245857 51.05
233 Toth, Bela245862 36.53
234 Godes, Dmitry R245674 40.26
235 Hernandez, Roman245554 29.93
236 Hennings, Artur245568 39.30
237 Sahovic, Dragutin245553 39.23
238 Vladimirov, Evgeny Y245565 22.78
239 Mestel, A Jonathan245453 22.63
240 Espig, Lutz245350 30.82
241 Hug, Werner245258 27.14
242 Kristiansen, Jens245258 27.43
243 Garcia Martinez, Silvino245258 35.32
244 Qi Jingxuan245257 31.97
245 Pytel, Krzysztof245160 34.46
246 Gutman, Lev245163 34.10
247 Spassov, Liuben245154 36.61
248 Rubinetti, Jorge A244958 34.58
249 Antunac, Goran244973 34.54
250 Messing, Hrvoje244865 39.26
251 Portisch, Ferenc244856 40.56
252 Raicevic, Vladimir244859 30.49
253 Ciric, Dragoljub M244766 43.96
254 Rogulj, Branko244566 28.25
255 Zaichik, Gennady L244562 22.72
256 Adamski, Jan244451 35.96
257 Jakobsen, Ole244457 37.03
258 Eslon, Jaan244472 27.66
259 Langeweg, Kick244352 42.65
260 Kozlov, V.244376
261 Groszpeter, Attila244257 19.39
262 Schussler, Harry244254 22.35
263 Todorcevic, Miodrag244167 38.97
264 Zapata, Alonso244171 21.19
265 Lukacs, Peter244052 29.31
266 Minic, Dragoljub244074 42.65
267 Bellin, Robert243956 27.34
268 Sideif Sade, Fikret I243861 27.83
269 Sydor, Andrzej243873 42.83
270 Popovic, Petar243865 20.71
271 Mikenas, Vladas243670 69.54
272 Bertok, Mario243674 50.16
273 Planinc, Albin243654 35.54
274 Poutiainen, Pertti243672
275 Malevinsky, Alexander A243473 29.68
276 Řgaard, Leif243460 27.82
277 Hamann, Svend243465 39.06
278 Kuijpers, Franciscus Antonius243470
279 Rukavina, Josip243463 36.92
280 Nogueiras, Jesus243364 20.29
281 Mestrovic, Zvonimir243371 35.04
282 Velikov, Petar243365 28.59
283 Pomar Salamanca, Arturo243364 48.16
284 Matera, Salvatore Joseph243365
285 Castro Rojas, Oscar Humberto243259 26.48
286 Ornstein, Axel243157 27.52
287 Sznapik, Aleksander243152 28.72
288 Schweber, Samuel243160 43.29
289 Dely, Peter243162 45.32
290 Ghitescu, Theodor243156 45.77
291 Bönsch, Uwe243052 21.04
292 Gerusel, Mathias243061 41.74
293 Garcia, Raimundo243068 43.43
294 Szmetan, Jorge243054 29.43
295 Ivanovic, Božidar242953 33.19
296 Popov, Nikolay242867
297 Ostojic, Predrag242858 41.69
298 Liebert, Heinz242860 43.44
299 Balinas, Rosendo Carrean242859
300 Littlewood, Paul E242858 23.79
301 Duer, Arne242866 20.31
302 Borik, Otto242863 32.10
303 Sloth, Jorn242671 35.15
304 Doda, Zbigniew242669 48.69
305 Jamieson, Robert Murray242665
306 Minev, Nikolay N242571 48.81
307 Eolian, Levon S242573 20.12
308 Bohm, Hans242552 29.79
309 Flesch, Janos242470 46.09
310 Tompa, Janos242255 32.50
311 Balshan, Amikam242160
312 Honfi, Karoly242163 49.02
313 Georgiev, Krum242171 21.44
314 Hoelzl, Franz242163 33.57
315 Spiridonov, Nikola242157 41.67
316 Wirthensohn, Heinz242063 28.49
317 Magerramov, Elmar S242070 21.56
318 Krnic, Zdenko242067 32.08
319 Brinck Claussen, Bjorn242065
320 Garcia, Gildardo242060 25.64
321 Trapl, Jindrich242060 37.60
322 Kaiumov, Dmitry D242074 30.67
323 Skrobek, Ryszard242057 28.32
324 Botterill, George Steven241955
325 Donoso Velasco, Pedro H241872 35.68
326 Rocha, Antonio241862 35.38
327 Rodriguez, Ruben241861 32.89
328 Pribyl, Josef241852 32.05
329 Barle, Janez241856 27.61
330 Zilberman, Nathan R241872 39.49
331 Chiburdanidze, Maia G241759 18.79
332 Rossetto, Héctor D241569 57.15
333 Augustin, Josef241554 37.45
334 Ruderfer, Mark B241475
335 Strauss, David J241465 33.23
336 Taulbut, Shaun M241358 21.80
337 Webb, Simon241358 30.39
338 Bronstein, Luis241356 33.41
339 Plaskett, Jim241261 19.62
340 Littlewood, John Eric241269
341 Grinberg, Ricardo241269 31.80
342 Janoševic, Dragoljub241258 56.31
343 Cvetkovic, Srdjan241158 33.67
344 Iskov, Gert241160 31.26
345 Emma, Jaime J241157 41.79
346 Kaufman, Larry C241170 31.95
347 Bohosjan, Sarkis241061 38.59
348 Haygarth, Michael J240974
349 Hase, Juan Carlos240863
350 Wahlbom, Magnus240869 34.46
351 Sisniega, Marcel240864 20.26
352 Harandi, Khosro240760 29.16
353 Zichichi, Alvise240775 41.32
354 Bednarski, Jacek B240760 40.63
355 Vilela, Jose Luis240754 26.62
356 Watson, John L240761 28.15
357 Djuric, Stefan240661 24.26
358 Ostermeyer, Peter240671 36.05
359 Nicevski, Risto240658 34.34
360 Hausner, Ivan240559 27.54
361 Wittmann, Walter240563 31.63
362 Rohde, Michael A240564 20.18
363 Kestler, Hans-Günter240570 39.88
364 Kuligowski, Adam240453 23.85
365 Rodriguez Vargas, Orestes240462 36.32
366 Hoi, Carsten240458 22.79
367 Cuartas, Carlos240366 39.21
368 Enklaar, Bertus F240262
369 Meyer, E.240268
370 Soos, Bela240272 49.65
371 Gofshtein, Leonid D240273 26.53
372 Zwaig, Arne240273
373 Rigo, Janos240156 31.01
374 Haik, Aldo240063 27.03
375 Bradford, Joseph M239968 28.99
376 Dueckstein, Andreas239963 52.24
377 Joksic, Sinisa239866 39.06
378 Pritchett, Craig William239872
379 Bukal, Vladimir Sr239868 39.99
380 Kagan, Shimon239654 37.57
381 Morris, Walter D239662 21.16
382 Chandler, Murray G239657 19.57
383 Pokojowczyk, Jerzy239656 30.69
384 Evans, Larry D239575
385 Debarnot, Roberto239565 32.24
386 Gonsior, Evzen239560 47.89
387 Deze, Anton239569
388 Law, Andrew P239467 29.31
389 Swic, Waldemar239459 26.64
390 Ilievski, Dimitar239371 38.19
391 Lombard, Andre239265 29.12
392 Meduna, Eduard239156 29.14
393 Butnorius, Algimantas239174 32.94
394 Peev, Peicho Chonev239063 39.58
395 Lieb, Harald238965 44.84
396 Cappello, Renato238860
397 Taylor, Timothy238865 26.73
398 Banas, Jan238853 32.41
399 Horner, Jeff238874 30.18
400 Van der Sterren, Paul238752 23.62
401 Bellon Lopez, Juan Manuel238655 29.48
402 Filipowicz, Andrzej238667 41.47
403 Garcia Padron, Jose238667 21.61
404 Dobosz, Henryk238666 26.61
405 Hartoch, Robert G238657
406 Bouaziz, Slim238657 29.54
407 Pétursson, Margeir238557 19.71
408 Sibarevic, Milenko238561 34.63
409 Vaisman, Volodia238566 41.84
410 Fedder, Steen238469 28.38
411 Neckar, Lubomir238461 29.24
412 Dzuban, Oleg I238471
413 Segal, Alexandru Sorin238257 32.07
414 Pavlov, Mircea238264 42.13
415 Arnason, Jon L238255 18.96
416 Biriescu, Ioan238273 26.01
417 Cuasnicu, Oscar238275 37.02
418 Taruffi, Daniele238174 21.16
419 Bielczyk, Jacek238157 26.69
420 Sikora Lerch, Jan238155
421 Franklin, Michael J238068 48.74
422 Ilic, Zoran238075 16.24
423 Lau, Ralf237963 20.03
424 Hesse, Peter237960 35.09
425 Visier Segovia, Fernando237964 36.74
426 Van Riemsdijk, Herman C237952 31.18
427 Formanek, Edward W237864 37.48
428 Goodman, David SC237866
429 Cramling, Dan237866 20.74
430 Rajna, George237765 32.71
431 Schinzel, Wladyslaw237753 36.44
432 Orso, Miklos237660 23.40
433 Horvath, Tamas237661 28.02
434 Whiteley, Andrew J237567 32.39
435 Mortensen, Erling237564 24.57
436 Frias, Victor J237570 23.72
437 Mascarinas, Rico237562 26.66
438 Helmers, Knut J237562 22.73
439 Moehring, Guenther237452 42.93
440 Szymczak, Zbigniew237360 27.82
441 Kopec, Danny237373 25.67
442 Petran, Pal237160 33.13
443 Fedorowicz, John P237055 21.09
444 Filguth, Rubens A237059 23.60
445 Franco Ocampos, Zenon237070 23.47
446 Rantanen, Yrjo A236959 29.52
447 Akvist, Hakan236970 38.01
448 Olafsson, Helgi236858 23.21
449 Buljovcic, Ivan236867 42.84
450 Huss, Andreas236573 29.04
451 Rogers, Ian236463 19.35
452 Cooper, John Grantley236470
453 Kirpichnikov, Vladimir S236373
454 Bojkovic, Slobodan236366 34.26
455 Hebert, Jean236258 21.96
456 Andre, Wolfgang236274 26.62
457 Karlsson, Lars236164 24.30
458 Szilágyi, György236166 58.32
459 Birnboim, Nathan236171 28.92
460 Basman, Michael J236163 33.62
461 Mihaljcisin, Mihajlo236074 46.69
462 Jamroz, Zbigniew236063 45.39
463 Tischbierek, Raj235967 17.10
464 Shpilker, Boris235976 23.45
465 Morovic Fernández, Iván E235976 16.60
466 Spacek, Petr235872 25.68
467 Trois, Francisco RT235854
468 Lanc, Alois235872 31.70
469 Watzka, Horst235766 41.13
470 Sapi, Laszlo235560 44.61
471 Cámpora, Daniel H235567 22.34
472 Hebden, Mark235564 21.71
473 Anelli, Antonio235470 35.47
474 Fries Nielsen, Jens Ove235263 19.69
475 Coudari, Camille235275 28.26
476 Van der Vliet, Fredrik235260
477 Steiner, Drako235271
478 Rosenlund, Thorbjorn235171 28.37
479 Garcia Palermo, Carlos235060 25.91
480 Ambroz, Jan235066 25.37
481 Cebalo, Mišo234976 34.73
482 Kaiszauri, Konstanty234860 27.02
483 Kovacs, Laszlo M234755 41.07
484 Bjelajac, Milan234771 31.63
485 Duric, Slavko234676 25.44
486 Despotovic, Momcilo234669 31.66
487 Ristic, Nenad234669 20.94
488 Przewoznik, Jan234463 22.12
489 Tichy, Vladimir234462 33.08
490 Tisdall, Jonathan D234370 21.18
491 Day, Lawrence A234366 30.75
492 Shirazi, Kamran G234365 26.94
493 Niklasson, Christer234360 26.82
494 Barreras, Alberto234366 28.57
495 Lanka, Zigurds234071 19.44
496 Svensson, Bengt233876 19.31
497 Hess, Ralf233871 35.59
498 Wagman, Stuart233669 60.46
499 Roos, Louis233668 21.89
500 Lehmann, Heinz Dr233670

These ratings, calculated as of October 31, 1979, incorporate all games (against rated opponents) played in the time between November 1, 1978 and October 31, 1979, along with the ratings that were already calculated as of October 31, 1978. 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 October 31, 1979. This represents the player's estimated strength on November 1, 1979.

+/- 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 November 1, 1979. The +/- value represents the standard deviation of that estimate; the player's true strength on November 1, 1979 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 November 1, 1979. 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 October 31, 1979. 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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