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Top 10 active players as of June 30, 1979


Top 500 active players as of June 30, 1979

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E27964951.3% #328.10
2 Korchnoi, Viktor L27644923.0% #548.27
3 Tal, Mikhail2732498.2% #1042.64
4 Portisch, Lajos2714504.4% #1442.24
5 Polugaevsky, Lev A2699502.5% #2044.61
6 Tseshkovsky, Vitaly V2683501.2% #2734.76
7 Spassky, Boris V2682491.1% #2742.42
8 Petrosian, Tigran V2681491.0% #2750.04
9 Timman, Jan H2668480.5% #3327.54
10 Vaganian, Rafael A2665500.5% #3627.71
11 Mecking, Henrique2656621.2% #4727.44
12 Ljubojevic, Ljubomir2652490.2% #4428.66
13 Larsen, Bent2650490.2% #4644.32
14 Kasparov, Garry K2647540.3% #4916.21
15 Balashov, Yury S2646510.2% #4930.30
16 Ribli, Zoltán2646500.1% #4927.81
17 Hübner, Robert2644500.1% #5030.65
18 Vasiukov, Evgeny A2641550.3% #5446.32
19 Geller, Efim P2640510.2% #5354.33
20 Romanishin, Oleg M2636500.1% #5627.47
21 Gheorghiu, Florin2635500.1% #5735.23
22 Hort, Vlastimil2635480.1% #5535.47
23 Smyslov, Vassily V2635510.1% #5758.27
24 Lerner, Konstantin Z2633570.3% #6129.34
25 Beliavsky, Alexander G2633500.1% #5825.54
26 Sveshnikov, Evgeny E2632500.1% #5929.38
27 Tukmakov, Vladimir B2631500.1% #5933.29
28 Andersson, Ulf263048 #5928.01
29 Kholmov, Ratmir D2624550.1% #6854.13
30 Kavalek, Lubomir2623500.1% #6735.88
31 Gulko, Boris F262250 #6732.39
32 Savon, Vladimir A2620530.1% #7138.76
33 Krogius, Nikolay V2615710.5% #8648.93
34 Ivanov, Igor V2614640.2% #8332.48
35 Unzicker, Wolfgang2611550.1% #8054.01
36 Gligoric, Svetozar260850 #7956.41
37 Smejkal, Jan260751 #8033.27
38 Kuzmin, Gennady P260650 #8033.45
39 Bagirov, Vladimir K260451 #8442.87
40 Dvoretsky, Mark I2604600.1% #8931.56
41 Gufeld, Eduard E260356 #8643.28
42 Rashkovsky, Nukhim N260256 #8833.20
43 Dzindzichashvili, Roman Y260151 #8635.15
44 Palatnik, Semen A2601610.1% #9229.26
45 Dorfman, Iosif D260051 #8627.16
46 Chekhov, Valery A2598670.1% #9823.59
47 Mikhalchishin, Adrian B259752 #9024.62
48 Razuvaev, Yury S259653 #9333.72
49 Kochiev, Alexander259451 #9223.26
50 Sax, Gyula259450 #9228.03
51 Liberzon, Vladimir M259355 #9642.27
52 Bronstein, David I259353 #9455.36
53 Kurajica, Bojan259354 #9531.62
54 Parma, Bruno259255 #9637.50
55 Gipslis, Aivars259256 #9742.39
56 Sanguinetti, Raúl C2589650.1% #10646.41
57 Psakhis, Lev B258959 #10320.59
58 Sosonko, Gennadi258749 #9836.12
59 Panno, Oscar R258652 #10044.29
60 Uhlmann, Wolfgang258150 #10444.25
61 Browne, Walter S257849 #10730.47
62 Tarjan, James E257754 #11027.36
63 Szabó, László2577660.1% #11862.28
64 Dolmatov, Sergey V257662 #11720.36
65 Miles, Anthony J257648 #10824.19
66 Antoshin, Vladimir S2576670.1% #12050.13
67 Luczak, Andrzej257658 #11430.57
68 Georgadze, Tamaz V257552 #11131.64
69 Kudriashov, Anatoly A2571730.1% #12837.20
70 Makarichev, Sergey Y257053 #11725.62
71 Averbakh, Yury L2570710.1% #12957.39
72 Knaak, Rainer F257051 #11526.29
73 Zaitsev, Igor A256962 #12441.09
74 Olafsson, Fridrik256853 #11844.43
75 Pfleger, Helmut256854 #11935.89
76 Timoshchenko, Gennady256753 #11930.17
77 Grigorian, Karen A256656 #12331.81
78 Nemet, Ivan256362 #12936.21
79 Byrne, Robert E256152 #12451.19
80 Suetin, Alexey S256156 #12752.62
81 Zakharov, Alexander V256167 #13435.73
82 Csom, István256049 #12439.08
83 Tseitlin, Mikhail S256055 #12732.04
84 Tringov, Georgy P256060 #13042.31
85 Ivkov, Borislav256051 #12645.63
86 Taimanov, Mark E255955 #12853.40
87 Alburt, Lev O255953 #12733.85
88 Stean, Michael F255851 #12625.82
89 Lombardy, William J255855 #12941.57
90 Lein, Anatoly255852 #12748.26
91 Jussupow, Artur M255554 #13219.38
92 Matanovic, Aleksandar255356 #13449.10
93 Kupreichik, Viktor D255354 #13329.98
94 Darga, Klaus V2551730.1% #14745.35
95 Ubilava, Elizbar E254868 #14628.84
96 Pachmann, Ludek254757 #14055.13
97 Evans, Larry M254768 #14747.27
98 Klovans, Janis254763 #14444.22
99 Kapengut, Albert Z254659 #14234.98
100 Rogoff, Kenneth S254560 #14426.27
101 Zaltsman, Vitaly F254471 37.68
102 Najdorf, Miguel254456 69.21
103 Matulovic, Milan254356 44.05
104 Panchenko, Alexander N254356 25.73
105 Vokác, Marek254374 20.56
106 Adorján, András254250 29.25
107 Karasev, Vladimir I254274 41.04
108 Bukic, Enver254154 41.58
109 Díez del Corral, Jesús254063 46.23
110 Veingold, Aleksander253961 25.72
111 Knezevic, Milorad253852 42.66
112 Filip, Miroslav253565 50.67
113 Nikolac, Juraj253553 47.19
114 Reshevsky, Samuel H253355 67.59
115 Vogt, Lothar H253350 27.45
116 Shamkovich, Leonid A253355 56.08
117 Velimirovic, Dragoljub253153 37.13
118 Platonov, Igor V253070 45.45
119 Ivanov, Alexander V253057 23.16
120 Nunn, John D M253053 24.18
121 Nei, Iivo252858 47.66
122 Vitolinš, Alvis252759 33.04
123 Hecht, Hans-Joachim252665 40.42
124 Kaplan, Julio P252560 28.92
125 Petrushin, Alexander I252370 32.30
126 Ree, Hans252249 34.79
127 Benko, Pal C252058 50.95
128 Yurtaev, Leonid252060 20.16
129 Averkin, Orest N252067 35.35
130 Faragó, Iván251849 33.24
131 Radulov, Ivan251855 40.48
132 Anikaev, Yury251863 31.00
133 Lputian, Smbat G251761 21.38
134 Zhuravliov, Valerij251769 40.55
135 Sigurjónsson, Gudmundur251752 31.76
136 Peresipkin, Vladimir251660
137 Grefe, John A251662 31.81
138 Gurgenidze, Bukhuti I251565 45.63
139 Piasetski, Leon David251563
140 Quinteros, Miguel A251450 31.51
141 Vukcevich, Milan R251473
142 Hulak, Krunoslav251460 28.10
143 Petrosian, Arshak B251361 25.54
144 Kovacevic, Vladimir251360 37.26
145 Biyiasas, Peter251254 28.61
146 Stoica, Valentin251167 29.37
147 Weinstein, Norman250860 28.74
148 Malich, Burkhard G250753 42.59
149 Kakageldyev, Amanmurad250559 29.51
150 Lutikov, Anatoly S250457 46.40
151 Mariotti, Sergio250456 32.88
152 Regan, Kenneth250458 19.80
153 Vukic, Milan250353 35.86
154 Kharitonov, Andrey Y250373 20.24
155 Yuferov, Sergey N250373 33.57
156 Lukin, Andrei M250272 30.83
157 Bleiman, Yaacov250265 31.81
158 Schmidt, Wlodzimierz250151 36.22
159 Pintér, József250054 25.64
160 Torre, Eugenio249852 27.65
161 Marangunic, Srdjan249760 35.66
162 Bilek, István249668 46.88
163 Christiansen, Larry M249652 23.01
164 Prandstetter, Eduard249555 30.54
165 Marjanovic, Slavoljub249552 24.48
166 Schweber, Samuel249572 42.95
167 Peters, John A249455 28.39
168 Ftácnik, Lubomír249352 21.67
169 García Gonzáles, Guillermo249054 25.56
170 Donner, Johannes H249055 51.98
171 Hartston, William R249053 31.88
172 Lengyel, Levente248955 46.05
173 Diesen, Mark C248954
174 Piesina, Gintautas248961 27.23
175 Simic, Radoslav248768 31.06
176 Rajkovic, Dusan248656 37.04
177 Seirawan, Yasser248663 19.27
178 Schneider, Lars Ake248656
179 Keene, Raymond248653
180 Ungureanu, Emil248566 42.66
181 Ciocaltea, Victor248455 47.45
182 Forintos, Gyözö V248456 43.91
183 Suba, Mihai248352 32.08
184 Padevsky, Nikola B248263 46.09
185 Ghinda, Mihail Viorel248254 29.92
186 Barczay, Laszlo248051 43.36
187 Robatsch, Karl247956 50.71
188 Lechtynsky, Jiri247954 31.60
189 Zuckerman, Bernard247962 36.25
190 Zilberstein, Valery I247862 36.21
191 Rodriguez, Amador247853 22.81
192 Marovic, Dražen247856 41.46
193 Ghizdavu, Dumitru247771 30.11
194 Van Wijgerden, Cornelis247661 29.10
195 Tatai, Stefano247654 41.27
196 Mednis, Edmar J247557 42.27
197 Jansa, Vlastimil247551 36.59
198 Inkiov, Ventzislav247557 23.11
199 Soltis, Andrew E247559 32.09
200 Petkevich, Jusefs247562 38.53
201 Kirov Ivanov, Nino247453 33.81
202 Commons, Kim S247465 27.93
203 Hernandez, Roman247454 29.60
204 Lederman, Leon247369 32.10
205 Gaprindashvili, Nona247358 38.16
206 Bisguier, Arthur B247261 49.73
207 Szmetan, Jorge247255 29.09
208 Garcia Martinez, Silvino247155 34.98
209 Sofrevski, Jovan247171 43.86
210 Plachetka, Jan247151 34.37
211 Jakobsen, Ole247062 36.70
212 Calvo Minguez, Ricardo247063 35.69
213 Popov, Luben246955 43.42
214 Westerinen, Heikki MJ246853 35.17
215 Kraidman, Yair246666 46.66
216 Nikolic, Zivoslav246671 25.55
217 Podgaets, Mikhail Y246574 31.93
218 Mestel, A Jonathan246453 22.30
219 Jelen, Iztok246461 32.45
220 Vadasz, Laszlo246453 31.42
221 Sahovic, Dragutin246355 38.89
222 Martinovic, Slobodan246264 33.92
223 Gavrikov, Victor N246265 21.91
224 Mnatsakanian, Eduard A246266 40.56
225 Hennings, Artur246267 38.96
226 Szekely, Peter246158 24.39
227 Hug, Werner246056 26.80
228 Groszpeter, Attila246055 19.06
229 Vladimirov, Evgeny Y246066 22.44
230 Hazai, Laszlo245956 26.04
231 Ermenkov, Evgenij245854 29.75
232 Karner, Hillar245866 43.92
233 Spassov, Liuben245756 36.27
234 Rath, Ulrik245763 32.51
235 Ligterink, Gert245752 29.62
236 Rytov, Boris245661
237 Messing, Hrvoje245465 38.92
238 Horner, Jeff245475 29.84
239 Estrin, Yacov B245475 56.19
240 Karaklajic, Nikola245362 53.35
241 Vooremaa, Andres245262 34.94
242 Zaichik, Gennady L245162 22.38
243 Balinas, Rosendo Carrean245159
244 Toth, Bela245162 36.20
245 Langeweg, Kick245153 42.31
246 Antunac, Goran245173 34.20
247 Planinc, Albin245057 35.20
248 Gutman, Lev245059 33.76
249 Clarke, Peter H244974
250 Speelman, Jonathan S244854 22.74
251 Espig, Lutz244850 30.48
252 Rogulj, Branko244766 27.91
253 Portisch, Ferenc244754 40.22
254 Gruenfeld, Yehuda244663 23.34
255 Sunye Neto, Jaime244559 22.16
256 Ghitescu, Theodor244555 45.43
257 Gerusel, Mathias244462 41.40
258 Kozlov, V.244476
259 Řgaard, Leif244457 27.48
260 Wedberg, Tom244360 25.59
261 Castro Rojas, Oscar Humberto244257 26.14
262 Lukacs, Peter244251 28.97
263 Minic, Dragoljub244274 42.32
264 Godes, Dmitry R244174 39.92
265 Poutiainen, Pertti244172
266 Minev, Nikolay N244172 48.48
267 Raicevic, Vladimir244158 30.16
268 Malevinsky, Alexander A244073 29.34
269 Kuijpers, Franciscus Antonius243870
270 Mascarinas, Rico243861 26.33
271 Hamann, Svend243763 38.73
272 Todorcevic, Miodrag243767 38.64
273 Wirthensohn, Heinz243760 28.15
274 Mikenas, Vladas243763 69.20
275 Bertok, Mario243674 49.83
276 Rukavina, Josip243560 36.59
277 Ciric, Dragoljub M243567 43.63
278 Sydor, Andrzej243573 42.49
279 Ivanovic, Božidar243554 32.84
280 Pribyl, Josef243453 31.72
281 Garcia, Raimundo243368 43.09
282 Bohm, Hans243352 29.46
283 Qi Jingxuan243156 31.64
284 Pokojowczyk, Jerzy243056 30.36
285 Pomar Salamanca, Arturo243061 47.83
286 Mestrovic, Zvonimir243072 34.70
287 Liebert, Heinz242959 43.10
288 Kristiansen, Jens242956 27.10
289 Dely, Peter242960 44.98
290 Sideif Sade, Fikret I242962 27.49
291 Damjanovic, Mato242957 52.27
292 Popov, Nikolay242967
293 Bönsch, Uwe242951 20.71
294 Barcza, Gedeon242973 67.85
295 Ornstein, Axel242856 27.18
296 Williams, Arthur Howard242769
297 Borik, Otto242765 31.76
298 Eolian, Levon S242773 19.79
299 Matera, Salvatore Joseph242762
300 Trapl, Jindrich242659 37.27
301 Sloth, Jorn242565 34.82
302 Magerramov, Elmar S242570 21.22
303 Rubinetti, Jorge A242465 34.25
304 Ostojic, Predrag242457 41.36
305 Hoi, Carsten242458 22.45
306 Kagan, Shimon242455 37.23
307 Barle, Janez242456 27.27
308 Donoso Velasco, Pedro H242367 35.34
309 Flesch, Janos242365 45.75
310 Kuligowski, Adam242353 23.52
311 Rocha, Antonio242362 35.05
312 Brinck Claussen, Bjorn242363
313 Velikov, Petar242265 28.25
314 Honfi, Karoly242262 48.68
315 Adamski, Jan242252 35.63
316 Djuric, Stefan242162 23.92
317 Ruderfer, Mark B242075
318 Sznapik, Aleksander242051 28.39
319 Skrobek, Ryszard242057 27.98
320 Cvetkovic, Srdjan242062 33.34
321 Partos, Charles242069 42.88
322 Kaiumov, Dmitry D242074 30.34
323 Goodman, David SC241968
324 Janoševic, Dragoljub241857 55.97
325 Popovic, Petar241865 20.38
326 Bednarski, Jacek B241756 40.30
327 Hase, Juan Carlos241761
328 Augustin, Josef241754 37.12
329 Strauss, David J241770 32.89
330 Georgiev, Krum241671 21.10
331 Nogueiras, Jesus241664 19.95
332 Tompa, Janos241654 32.17
333 Hausner, Ivan241660 27.21
334 Doda, Zbigniew241565 48.36
335 Gofshtein, Leonid D241573 26.19
336 Bellon Lopez, Juan Manuel241554 29.14
337 Biriescu, Ioan241474 25.68
338 Garcia, Gildardo241459 25.31
339 Rossetto, Héctor D241469 56.81
340 Kaufman, Larry C241270 31.62
341 Taulbut, Shaun M241255 21.47
342 Plaskett, Jim241263 19.28
343 Grinberg, Ricardo241266 31.46
344 Banas, Jan241254 32.07
345 Krnic, Zdenko241171 31.74
346 Pytel, Krzysztof241164 34.12
347 Emma, Jaime J241161 41.45
348 Enklaar, Bertus F241074
349 Iskov, Gert240965 30.92
350 Bohosjan, Sarkis240959 38.26
351 Watson, John L240962 27.82
352 Bronstein, Luis240860 33.08
353 Spiridonov, Nikola240859 41.34
354 Meduna, Eduard240756 28.80
355 Kestler, Hans-Günter240765 39.55
356 Vilela, Jose Luis240753 26.28
357 Rodriguez Vargas, Orestes240561 35.98
358 Sisniega, Marcel240562 19.92
359 Bellin, Robert240559 26.99
360 Webb, Simon240456 30.05
361 Schussler, Harry240356 22.02
362 Eslon, Jaan240373 27.32
363 Balshan, Amikam240358
364 Zwaig, Arne240273
365 Zichichi, Alvise240275 40.98
366 Meyer, E.240168
367 Nicevski, Risto240165 34.01
368 Franklin, Michael J240175 48.41
369 Chiburdanidze, Maia G240155 18.45
370 Cuartas, Carlos240070 38.87
371 Zilberman, Nathan R239972 39.16
372 Hoelzl, Franz239971 33.23
373 Joksic, Sinisa239966 38.72
374 Bradford, Joseph M239968 28.66
375 Morris, Walter D239762 20.83
376 Soos, Bela239772 49.31
377 Butnorius, Algimantas239774 32.61
378 Littlewood, Paul E239763 23.45
379 Huss, Andreas239665 28.71
380 Rohde, Michael A239664 19.84
381 Rigo, Janos239556 30.67
382 Dobosz, Henryk239463 26.28
383 Evans, Larry D239475
384 Neckar, Lubomir239361 28.90
385 Debarnot, Roberto239365 31.89
386 Sibarevic, Milenko239261 34.30
387 Ilievski, Dimitar239272 37.84
388 Filipowicz, Andrzej239163 41.13
389 Cuasnicu, Oscar239175 36.68
390 Hartoch, Robert G239156
391 Pritchett, Craig William238965
392 Taylor, Timothy238965 26.39
393 Deze, Anton238865
394 Spacek, Petr238872 25.34
395 van der Wiel, John T H238760 19.88
396 Dzuban, Oleg I238771
397 Pétursson, Margeir238757 19.37
398 Bukal, Vladimir Sr238668 39.66
399 Cappello, Renato238660
400 Lombard, Andre238559 28.78
401 Whiteley, Andrew J238563 32.06
402 Bojkovic, Slobodan238566 33.92
403 Jamieson, Robert Murray238466
404 Lieb, Harald238365 44.51
405 Vaisman, Volodia238367 41.51
406 Swic, Waldemar238357 26.30
407 Moehring, Guenther238353 42.60
408 Silva, Fernando238175 28.90
409 Harandi, Khosro238174 28.83
410 Botterill, George Steven238156
411 Visier Segovia, Fernando238161 36.41
412 Peev, Peicho Chonev238061 39.24
413 Schinzel, Wladyslaw238056 36.11
414 Kopec, Danny238072 25.34
415 Garcia Padron, Jose237965 21.27
416 Franco Ocampos, Zenon237966 23.13
417 Ilic, Zoran237975 15.90
418 Haik, Aldo237963 26.70
419 Ambroz, Jan237766 25.03
420 Formanek, Edward W237764 37.15
421 Mortensen, Erling237767 24.23
422 Orso, Miklos237760 23.06
423 Helmers, Knut J237761 22.40
424 Hesse, Peter237660 34.75
425 Rajna, George237662 32.38
426 Horvath, Tamas237659 27.69
427 Taruffi, Daniele237674 20.82
428 Pavlov, Mircea237664 41.79
429 Sikora Lerch, Jan237555
430 Lau, Ralf237563 19.70
431 Fedder, Steen237564 28.04
432 Littlewood, John Eric237472
433 Buljovcic, Ivan237467 42.51
434 Segal, Alexandru Sorin237456 31.74
435 Basman, Michael J237267 33.29
436 Wahlbom, Magnus237272 34.12
437 Bouaziz, Slim237163 29.20
438 Szymczak, Zbigniew237069 27.49
439 Fedorowicz, John P237058 20.76
440 Filguth, Rubens A237059 23.27
441 Van der Sterren, Paul237054 23.29
442 Olafsson, Helgi236957 22.87
443 Coudari, Camille236869 27.91
444 Kostro, Jerzy236870 42.43
445 Sarapu, Ortvin236871 55.44
446 Petran, Pal236558 32.79
447 Akvist, Hakan236570 37.67
448 Cooper, John Grantley236566
449 Van Riemsdijk, Herman C236556 30.84
450 Law, Andrew P236370 28.97
451 Szilágyi, György236366 57.98
452 Tischbierek, Raj236368 16.77
453 Ivarsson, Stefan236276 26.41
454 Shpilker, Boris236276 23.12
455 Van der Vliet, Fredrik236160
456 Baljon, Christofoor236158 26.01
457 Maciejewski, Andrzej236075 27.97
458 Bielczyk, Jacek236057 26.35
459 Lanc, Alois235972 31.37
460 Birnboim, Nathan235968 28.59
461 Anelli, Antonio235970 35.13
462 Arnason, Jon L235659 18.63
463 Kaiszauri, Konstanty235659 26.68
464 Steiner, Drako235371
465 Chandler, Murray G235360 19.24
466 Sapi, Laszlo235360 44.28
467 Cámpora, Daniel H235364 21.99
468 Nickoloff, Bryon235272 23.02
469 Garcia Palermo, Carlos235260 25.58
470 Niklasson, Christer235164 26.49
471 Rayner, Emmanuel235173 21.05
472 Flear, Glenn C235073 20.38
473 Bjelajac, Milan234871 31.29
474 Duric, Slavko234876 25.11
475 Cebalo, Mišo234876 34.40
476 Kovacs, Laszlo M234754 40.73
477 Zapata, Alonso234666 20.85
478 Barreras, Alberto234566 28.23
479 Fichtl, Jirí234574 58.37
480 Rantanen, Yrjo A234558 29.19
481 Despotovic, Momcilo234471 31.32
482 Tisdall, Jonathan D234370 20.84
483 Danner, Georg234367 32.68
484 Trois, Francisco RT234360
485 Frias, Victor J234265 23.39
486 Day, Lawrence A234262 30.41
487 Tichy, Vladimir234262 32.74
488 Hess, Ralf234071 35.26
489 Lebredo, Gerardo233857 28.90
490 Liu Wenzhe233876 38.73
491 Mokrý, Karel233673 20.40
492 Borm, Franciscus WM233661
493 Rosenlund, Thorbjorn233672 28.03
494 Kirpichnikov, Vladimir S233674
495 Gruchacz, Robert233570 25.58
496 deFirmian, Nicholas E233467 21.92
497 Lehmann, Heinz Dr233471
498 Goldenberg, Richard233474 31.61
499 Kelecevic, Nedeljko233366 32.30
500 Hebert, Jean233364 21.63

These ratings, calculated as of June 30, 1979, incorporate all games (against rated opponents) played in the time between July 1, 1978 and June 30, 1979, along with the ratings that were already calculated as of June 30, 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 June 30, 1979. This represents the player's estimated strength on July 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 July 1, 1979. The +/- value represents the standard deviation of that estimate; the player's true strength on July 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 July 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 June 30, 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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