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Top 10 active players as of April 30, 1977


Top 500 active players as of April 30, 1977

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E27954958.6% #225.93
2 Polugaevsky, Lev A2731509.7% #1042.44
3 Korchnoi, Viktor L2720506.7% #1346.10
4 Petrosian, Tigran V2711494.7% #1647.86
5 Portisch, Lajos2700503.3% #2040.07
6 Tal, Mikhail2694492.4% #2240.47
7 Mecking, Henrique2688542.7% #2625.27
8 Spassky, Boris V2688512.1% #2540.25
9 Hort, Vlastimil2670490.7% #3333.30
10 Romanishin, Oleg M2667500.8% #3525.30
11 Balashov, Yury S2666500.7% #3628.13
12 Ljubojevic, Ljubomir2666500.7% #3626.49
13 Larsen, Bent2665500.7% #3642.15
14 Geller, Efim P2658500.5% #4052.16
15 Kuzmin, Gennady P2655530.6% #4431.28
16 Gufeld, Eduard E2650600.9% #5141.11
17 Smyslov, Vassily V2650510.3% #4756.10
18 Tseshkovsky, Vitaly V2648490.2% #4632.60
19 Gulko, Boris F2646500.2% #4830.22
20 Kholmov, Ratmir D2634540.2% #5951.96
21 Hübner, Robert2633520.1% #6028.48
22 Vasiukov, Evgeny A2631560.2% #6444.15
23 Savon, Vladimir A2626510.1% #6536.59
24 Gligoric, Svetozar2625520.1% #6554.24
25 Gipslis, Aivars2625540.1% #6740.23
26 Smejkal, Jan2624500.1% #6531.11
27 Chekhov, Valery A2623570.2% #7021.43
28 Ribli, Zoltán2622510.1% #6825.65
29 Sveshnikov, Evgeny E2622530.1% #6927.22
30 Evans, Larry M2620680.5% #7945.11
31 Vaganian, Rafael A2619520.1% #7125.54
32 Andersson, Ulf261748 #7025.84
33 Razuvaev, Yury S2616540.1% #7531.55
34 Dorfman, Iosif D2614540.1% #7624.99
35 Timman, Jan H261449 #7325.38
36 Byrne, Robert E261151 #7749.03
37 Gheorghiu, Florin261150 #7733.07
38 Panno, Oscar R260551 #8242.12
39 Marangunic, Srdjan2605650.2% #9133.50
40 Furman, Semen A260455 #8556.41
41 Krogius, Nikolay V2603620.2% #9146.77
42 Dvoretsky, Mark I2603570.1% #8829.39
43 Browne, Walter S260251 #8528.30
44 Dzindzichashvili, Roman Y2601600.1% #9132.98
45 Sosonko, Gennadi260050 #8533.94
46 Beliavsky, Alexander G259851 #9023.37
47 Bagirov, Vladimir K259757 #9340.71
48 Liberzon, Vladimir M259652 #9140.10
49 Lein, Anatoly2595650.2% #10046.09
50 Bronstein, David I259552 #9253.20
51 Zaitsev, Igor A259560 #9738.92
52 Unzicker, Wolfgang259455 #9651.84
53 Parma, Bruno259354 #9635.33
54 Kochiev, Alexander259257 #9921.10
55 Tukmakov, Vladimir B259151 #9531.12
56 Sanguinetti, Raúl C259153 #9644.24
57 Sax, Gyula258950 #9625.86
58 Olafsson, Fridrik258950 #9742.26
59 Kurajica, Bojan258851 #9829.46
60 Kavalek, Lubomir258651 #10033.72
61 Averbakh, Yury L258258 #10855.23
62 Darga, Klaus V2582640.1% #11243.18
63 Uhlmann, Wolfgang258149 #10342.09
64 Kupreichik, Viktor D258054 #10727.82
65 Velimirovic, Dragoljub258051 #10534.96
66 Alburt, Lev O258055 #10931.69
67 Miles, Anthony J257949 #10422.02
68 Bukic, Enver257958 #11039.41
69 Szabó, László257655 #11260.11
70 Torre, Eugenio257351 #11225.49
71 Taimanov, Mark E257151 #11351.23
72 Palatnik, Semen A257161 #11927.09
73 Kapengut, Albert Z2571740.1% #12732.82
74 Lerner, Konstantin Z257061 #12127.17
75 Pfleger, Helmut256956 #11933.73
76 Csom, István256850 #11536.90
77 Sakharov, A.256761 #123
78 Matulovic, Milan256653 #12041.88
79 Matanovic, Aleksandar256654 #12146.93
80 Sigurjónsson, Gudmundur256550 #11829.60
81 Schmid, Lothar M2565710.1% #13048.97
82 Panchenko, Alexander N256562 #12623.57
83 Najdorf, Miguel256456 #12367.04
84 Klovans, Janis256459 #12642.06
85 Lombardy, William J256454 #12239.40
86 Ivanov, Igor V256361 #12830.31
87 Adorján, András256151 #12327.08
88 Ivkov, Borislav256151 #12343.47
89 Grigorian, Karen A256053 #12529.65
90 Quinteros, Miguel A256052 #12529.34
91 Timoshchenko, Gennady256055 #12628.01
92 Commons, Kim S256064 #13325.77
93 Suetin, Alexey S255954 #12650.46
94 Nei, Iivo255960 #12945.50
95 Radulov, Ivan255957 #12938.31
96 Nikolac, Juraj255755 #12945.02
97 Lutikov, Anatoly S255757 #13044.23
98 Karasev, Vladimir I255761 #13238.86
99 Tarjan, James E254852 #13525.19
100 Rashkovsky, Nukhim N254652 #13731.03
101 Malich, Burkhard G254357 40.42
102 Platonov, Igor V254374 43.28
103 Schmidt, Wlodzimierz253951 34.05
104 Tringov, Georgy P253855 40.15
105 Knezevic, Milorad253755 40.50
106 Pachmann, Ludek253753 52.96
107 Petrosian, Arshak B253657 23.37
108 Shamkovich, Leonid A253660 53.91
109 Rogoff, Kenneth S253554 24.11
110 Filip, Miroslav253561 48.51
111 Suba, Mihai253557 29.91
112 Petrushin, Alexander I253560 30.14
113 Grefe, John A253461 29.65
114 Kovacevic, Vladimir253361 35.09
115 Hulak, Krunoslav253253 25.92
116 Averkin, Orest N253167 33.18
117 Reshevsky, Samuel H253059 65.43
118 Hermann, Manfred252962 34.66
119 Hecht, Hans-Joachim252557 38.25
120 Zakharov, Alexander V252561 33.56
121 Georgadze, Tamaz V252457 29.47
122 Antoshin, Vladimir S252464 47.95
123 Katalymov, Boris N252370
124 Karner, Hillar252260 41.76
125 Vogt, Lothar H252150 25.29
126 Makarichev, Sergey Y252060 23.45
127 Suttles, Duncan251966 31.36
128 Kirov Ivanov, Nino251953 31.64
129 Jansa, Vlastimil251850 34.43
130 Benko, Pal C251856 48.79
131 Vukcevich, Milan R251658
132 Pribyl, Josef251652 29.55
133 Vukic, Milan251456 33.70
134 Doroshkievich, Vladimir K251463 39.34
135 Bilek, István251355 44.72
136 Donner, Johannes H251253 49.82
137 Soltis, Andrew E251264 29.92
138 Faragó, Iván251250 31.08
139 Balinas, Rosendo Carrean251257
140 Gurgenidze, Bukhuti I251166 43.46
141 Sanguinetti, Renato251072 61.02
142 Tatai, Stefano250952 39.10
143 Vadasz, Laszlo250752 29.26
144 Díez del Corral, Jesús250764 44.07
145 Weinstein, Norman250755 26.57
146 Knaak, Rainer F250651 24.12
147 Stean, Michael F250552 23.65
148 Mariotti, Sergio250453 30.72
149 Keene, Raymond250351
150 García Gonzáles, Guillermo250355 23.39
151 Radev, Nikolai250161 38.36
152 Regan, Kenneth249964 17.63
153 Dueball, Juergen249965 32.09
154 Schweber, Samuel249857 40.79
155 Ree, Hans249751 32.62
156 Calvo Minguez, Ricardo249762 33.52
157 Lukin, Andrei M249774 28.67
158 Plachetka, Jan249453 32.20
159 Kaplan, Julio P249355 26.76
160 Rodriguez, Ruben249267 30.40
161 Simic, Radoslav249166 28.88
162 Stoica, Valentin249063 27.21
163 Christiansen, Larry M249058 20.84
164 Hartston, William R248953 29.72
165 Espig, Lutz248953 28.32
166 Barczay, Laszlo248850 41.19
167 Ciocaltea, Victor248854 45.29
168 Gaprindashvili, Nona248860 35.98
169 Peters, John A248862 26.22
170 Spassov, Liuben248760 34.11
171 Pereszupkin, Alexander248764
172 Nemet, Ivan248661 34.04
173 Ghitescu, Theodor248660 43.27
174 Ghizdavu, Dumitru248471 27.94
175 Padevsky, Nikola B248457 43.91
176 Rajkovic, Dusan248359 34.86
177 Mohrlok, Dieter248367
178 Schneider, Lars Ake248261
179 Karaklajic, Nikola248263 51.18
180 Podgaets, Mikhail Y248266 29.77
181 Bleiman, Yaacov248174 29.64
182 Eolian, Levon S248173 17.62
183 Rath, Ulrik247866 30.35
184 Planinc, Albin247852 33.03
185 Bednarski, Jacek B247760 38.13
186 Forintos, Gyözö V247554 41.75
187 Efimov, Igor247573 16.62
188 Marovic, Dražen247455 39.29
189 Kraidman, Yair247458 44.50
190 Ciric, Dragoljub M247263 41.47
191 Johannsson, Ingi Randver247265
192 Biyiasas, Peter247154 26.45
193 Nunn, John D M247157 22.01
194 Antunac, Goran247064 32.04
195 Hamann, Svend247070 36.56
196 Robatsch, Karl247059 48.54
197 Brasket, Curt Justin247067
198 Řgaard, Leif246959 25.32
199 Sahovic, Dragutin246763 36.73
200 Garcia Martinez, Silvino246755 32.82
201 Sofrevski, Jovan246669 41.70
202 Janoševic, Dragoljub246659 53.81
203 Barle, Janez246660 25.11
204 Damjanovic, Mato246554 50.10
205 Lputian, Smbat G246573 19.21
206 Gerusel, Mathias246556 39.23
207 Cvetkovic, Srdjan246468 31.17
208 Mestrovic, Zvonimir246464 32.54
209 Flesch, Janos246262 43.58
210 Popov, Luben246254 41.26
211 Kozlov, V.246264
212 Rodriguez, Amador246255 20.64
213 Mnatsakanian, Eduard A246167 38.40
214 Spiridonov, Nikola246154 39.17
215 Martz, William E246063
216 Zuckerman, Bernard245963 34.08
217 Hazai, Laszlo245855 23.87
218 Kestler, Hans-Günter245862 37.38
219 Anikaev, Yury245767 28.83
220 Poutiainen, Pertti245757
221 Zilberstein, Valery I245674 34.05
222 Vladimirov, Evgeny Y245663 20.28
223 Portisch, Ferenc245658 38.06
224 Rohde, Michael A245661 17.68
225 Raicevic, Vladimir245558 27.99
226 Honfi, Karoly245452 46.51
227 Botterill, George Steven245459
228 Dueckstein, Andreas245366 49.74
229 Goodman, David SC245363
230 McKay, Roderick M245271 25.22
231 Szekely, Peter245259 22.23
232 Cosulich, Roberto245270
233 Lengyel, Levente245261 43.87
234 Szmetan, Jorge245154 26.92
235 Bohosjan, Sarkis245164 36.09
236 Kuijpers, Franciscus Antonius245064
237 Ostojic, Predrag245056 39.19
238 Westerinen, Heikki MJ244951 33.01
239 Bohm, Hans244952 27.29
240 Mednis, Edmar J244855 40.11
241 Pintér, József244653 23.47
242 Martinovic, Slobodan244658 31.76
243 Jakobsen, Ole244569 34.53
244 Jansson, Borje244567 35.13
245 Minic, Dragoljub244459 40.15
246 Pomar Salamanca, Arturo244455 45.66
247 Khalikian, Ovik244373
248 Ungureanu, Emil244266 40.50
249 Pritchett, Craig William244262
250 Rodriguez Vargas, Orestes244259 33.82
251 Krnic, Zdenko244272 29.58
252 Bisguier, Arthur B244256 47.56
253 Castro Rojas, Oscar Humberto244154 23.97
254 Lakic, Nikola244164 29.79
255 Van Wijgerden, Cornelis244059 26.93
256 Haag, Ervin244061 44.30
257 Dely, Peter243963 42.82
258 Langeweg, Kick243953 40.15
259 Musil, Vojko243972 31.70
260 Ignatiev, Felix N243964 45.31
261 Sydor, Andrzej243857 40.32
262 Petkevich, Jusefs243869 36.36
263 Malevinsky, Alexander A243870 27.18
264 Hug, Werner243755 24.64
265 Ermenkov, Evgenij243754 27.59
266 Lederman, Leon243663 29.92
267 Zwaig, Arne243559
268 Eising, Johannes243461 41.91
269 Minev, Nikolay N243374 46.31
270 Toth, Bela243363 34.03
271 Rukavina, Josip243357 34.42
272 Cobo Arteaga, Eldis243365
273 Hase, Juan Carlos243267
274 Augustin, Josef243253 34.94
275 Guimard, Carlos E243264 64.07
276 Messing, Hrvoje243266 36.76
277 Estrin, Yacov B243267 54.03
278 Grinberg, Ricardo243168 29.29
279 Prandstetter, Eduard243161 28.37
280 Witkowski, Stefan243166 45.59
281 Buljovcic, Ivan243170 40.34
282 Gutman, Lev243159 31.59
283 Jiménez Zerquera, Eleazar243068 48.84
284 Liebert, Heinz243054 40.93
285 Brond, Victor242966
286 Rubinetti, Jorge A242954 32.08
287 Popov, Nikolay242867
288 Matera, Salvatore Joseph242857
289 Pytel, Krzysztof242756 31.95
290 Rogulj, Branko242767 25.75
291 Horner, Jeff242769 27.68
292 Yanofsky, Daniel A242666 52.09
293 Kagan, Shimon242657 35.07
294 Ligterink, Gert242652 27.45
295 Garcia, Raimundo242657 40.92
296 Williams, Arthur Howard242568
297 Haygarth, Michael J242469
298 Deze, Anton242471
299 Johannessen, Svein242275 39.54
300 Adamski, Jan242153 33.47
301 Ornstein, Axel242052 25.02
302 Hartoch, Robert G242054
303 Vaisman, Volodia241960 39.35
304 Ivanovic, Božidar241861 30.68
305 Doda, Zbigniew241753 46.19
306 Van Riemsdijk, Herman C241770 28.68
307 Bronstein, Luis241664 30.90
308 Rossetto, Héctor D241556 54.64
309 Ostermeyer, Peter241464 33.55
310 Penrose, Jonathan241470 43.56
311 van Scheltinga, Tjeerd D241471 63.15
312 Lechtynsky, Jiri241359 29.43
313 Wockenfuss, Klaus241361 25.67
314 Marjanovic, Slavoljub241263 22.32
315 Basman, Michael J241261 31.12
316 Bertok, Mario241166 47.66
317 Hernandez, Roman241156 27.44
318 Nicevski, Risto241159 31.83
319 Diesen, Mark C241161
320 Sunye Neto, Jaime241067 19.99
321 Bellin, Robert240958 24.83
322 Peev, Peicho Chonev240858 37.08
323 Enklaar, Bertus F240758
324 Soos, Bela240768 47.15
325 Webb, Simon240657 27.88
326 Ilievski, Dimitar240566 35.68
327 Sznapik, Aleksander240554 26.22
328 Bukal, Vladimir Sr240565 37.50
329 Gliksman, Darko240469 39.57
330 Moehring, Guenther240354 40.43
331 Jamieson, Robert Murray240363
332 Denker, Arnold S240369 63.19
333 Balduzzi, Reynaldo240269
334 Garcia, R.240269
335 Akvist, Hakan240265 35.51
336 Pohla, Harry240162 36.82
337 Kovacs, Laszlo M240066 38.57
338 Dake, Arthur William240067 67.06
339 Lehmann, Heinz Dr239971
340 Filipowicz, Andrzej239965 38.96
341 Sloth, Jorn239772 32.65
342 Zichichi, Alvise239767 38.82
343 De la Vega, Hector239570 51.12
344 Cuasnicu, Oscar239559 34.52
345 Lukacs, Peter239460 26.81
346 Visier Segovia, Fernando239266 34.24
347 Ghinda, Mihail Viorel239275 27.76
348 Soler, Alberto239168
349 Silva, Fernando239159 26.74
350 Pavlov, Mircea239073 39.63
351 Neckar, Lubomir238963 26.74
352 Uddenfeldt, Dan238975 26.09
353 Meduna, Eduard238868 26.64
354 Mestel, A Jonathan238658 20.13
355 Gesos, Pavlos238673 31.92
356 Bönsch, Uwe238554 18.54
357 De Bruycker, Bernard238569 35.87
358 Harandi, Khosro238558 26.66
359 Sapi, Laszlo238359 42.11
360 Bellon Lopez, Juan Manuel238352 26.97
361 Markland, Peter R238272 26.05
362 Knox, Victor W238169 32.27
363 Tompa, Janos238158 29.99
364 Kozma, Julius238059 47.91
365 Garcia, Jo238071
366 Formanek, Edward W237966 34.98
367 Seirawan, Yasser237967 17.10
368 Radashkovich, Itchak237975
369 Wade, Robert Graham237964
370 Gasic, Bozidar237765 39.55
371 Macles, Jacques237664 31.81
372 Navarovszky, Laszlo237663 44.07
373 Bjelajac, Milan237565 29.13
374 Cuartas, Carlos237565 36.71
375 Eslon, Jaan237567 25.15
376 Kostro, Jerzy237467 40.26
377 Betancort Curbelo, Juan237370 34.71
378 Szymczak, Zbigniew237257 25.32
379 Ervin, Roy C237266 26.32
380 Garcia Padron, Jose237271 19.10
381 Debarnot, Roberto237161 29.73
382 Rayner, Emmanuel237176 18.88
383 Pokojowczyk, Jerzy237156 28.19
384 Kinnmark, Ove237165 32.35
385 Heuer, Valter237162 48.79
386 Czerniak, Moshe237068 67.24
387 Sibarevic, Milenko236964 32.13
388 Barreras, Alberto236970 26.07
389 Emma, Jaime J236963 39.29
390 Ek, Hans236868 48.57
391 Banas, Jan236858 29.90
392 Rocha, Antonio236875 32.87
393 Akopian, Gagik236773 35.78
394 Iskov, Gert236763 28.76
395 Lombard, Andre236655 26.61
396 Zinn, Lothar236663 39.11
397 Levy, David Neil Lawrence236566
398 Mihaljcisin, Mihajlo236565 44.19
399 Alexandria, Nana236474 27.55
400 Maciejewski, Andrzej236359 25.81
401 Holm, Sejer236274 37.72
402 Whiteley, Andrew J236158 29.88
403 Garcia, Wilfredo236168 22.44
404 Onat, Ilhan236171 47.40
405 Corden, Martyn J236065
406 Tan Lian Ann236060
407 Casas, Fernando235673 50.69
408 Dieks, Roy G235573 21.25
409 Donchenko, Anatoly G235568 36.66
410 Petran, Pal235356 30.62
411 Trapl, Jindrich235374 35.10
412 Fuller, Maxwell L235263 32.26
413 Wirthensohn, Heinz235167 25.98
414 Spacek, Petr235073 23.18
415 Trabattoni, Franco234975 20.96
416 Lanc, Alois234967 29.20
417 Fichtl, Jirí234959 56.21
418 Cording, Harm234867 40.31
419 Rantanen, Yrjo A234868 27.02
420 Van Baarle, C John234861 32.03
421 Trois, Francisco RT234767
422 Estevez Morales, Guillermo234755
423 Speelman, Jonathan S234663 20.58
424 Manasterski, Lutoslaw234671 40.22
425 Szilágyi, György234459 55.82
426 Cardoso, Radolfo Tan234465
427 Naranja, Renato234473 36.60
428 Grabczewski, Romuald234366 45.23
429 Schinzel, Wladyslaw234256 33.93
430 Pinal, Nelson Borges234268
431 Ftácnik, Lubomír234264 19.50
432 Liljedahl, Lennart234171 29.68
433 Wahlbom, Magnus234174 31.95
434 Heinicke, Herbert T234069 72.13
435 Kluger, Guyla234062 63.29
436 De Greif, Boris233967 47.21
437 Boersma, Paulus A233763 28.79
438 Haik, Aldo233762 24.53
439 Kushnir, Alla233671
440 Van der Vliet, Fredrik233560
441 Hutchings, Stuart J233469
442 Kristiansen, Erling233466 40.37
443 Jancev, Lazo233471
444 Garcia Palermo, Carlos233462 23.41
445 Rostalski, Walter233369 24.31
446 Clemens, Christian233365 36.73
447 Eperjesi, Laszlo233362 33.95
448 Jankovec, Ivan233371 38.54
449 Baumbach, Friedrich233262 41.64
450 Horvath, Tamas233261 25.52
451 Ludgate, Alan233271 31.66
452 Osterman, Rudolf233170 30.78
453 Kuligowski, Adam233062 21.35
454 Quinones, Oscar Carillo232969
455 Schaufelberger, Heinz232867 29.45
456 Sikora Lerch, Jan232865
457 Gruenberg, Hans Ulrich232761 21.31
458 Franco Ocampos, Zenon232665 20.96
459 Bielczyk, Jacek232656 24.19
460 Rigo, Janos232563 28.51
461 Brkljaca, Ante232569 23.48
462 Bernard, Ryszard232470 32.69
463 Hesse, Peter232375 32.59
464 Tisdall, Jonathan D232276 18.68
465 Pesantes Carbajal, Carlos232267
466 Mueller, Klaus Uwe232159
467 Fedder, Steen232169 25.87
468 Boudy, Julio232059 25.88
469 Cleghorn, Peter231974
470 Borkowski, Franciszek231765 19.75
471 Niklasson, Christer231769 24.32
472 Franzen, Jozef231663 31.23
473 Seidler, Aldo231560
474 Hoen, Ragnar231573 36.57
475 Medina García, Antonio A231370 57.58
476 Taruffi, Daniele231375 18.65
477 Gereben, Ernö231270 69.86
478 Fedorowicz, John P231165 18.59
479 Kollberg, Lothar231167
480 Rosenlund, Thorbjorn231070 25.86
481 Rodriguez Cordoba, Jesus R230770 27.87
482 Helmertz, Per Inge230776
483 Day, Lawrence A230666 28.25
484 Govedarica, Radovan230565 29.21
485 Nowak, Ignacy230566 28.30
486 Menvielle Lacourrelle, Augusto230465 38.72
487 Olafsson, Helgi230361 20.71
488 Fraguela Gil, Jose Miguel230256
489 Braun, Gottfried230265 43.83
490 Dietze, Wolfgang230161 26.86
491 Paehtz, Thomas Sr230168 20.65
492 Petran, Peter230157 22.68
493 Cibulka, Vladimir230165 35.50
494 Verduga, Denis Homero230165
495 Novak, Ivan230158 34.26
496 Schmidt, Bodo230073 27.03
497 Kaiszauri, Konstanty230073 24.51
498 Andres Mendez, Miguel230069
499 Rumens, David E229761 37.60
500 Diaz, Joaquin C229657 28.82

These ratings, calculated as of April 30, 1977, incorporate all games (against rated opponents) played in the time between May 1, 1976 and April 30, 1977, along with the ratings that were already calculated as of April 30, 1976. 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 April 30, 1977. This represents the player's estimated strength on May 1, 1977.

+/- 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 May 1, 1977. The +/- value represents the standard deviation of that estimate; the player's true strength on May 1, 1977 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 May 1, 1977. 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 April 30, 1977. 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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