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Top 10 active players as of August 31, 1977

  #  

Player Rating +/-
1 Karpov, Anatoly E279449
2 Korchnoi, Viktor L274250
3 Polugaevsky, Lev A271549
4 Petrosian, Tigran V271250
5 Spassky, Boris V269951
6 Tal, Mikhail269449
7 Mecking, Henrique268756
8 Portisch, Lajos268650
9 Romanishin, Oleg M267949
10 Larsen, Bent267950

About these ratings

Top 500 active players as of August 31, 1977

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E27944956.0% #326.27
2 Korchnoi, Viktor L27425013.8% #946.44
3 Polugaevsky, Lev A2715495.1% #1542.78
4 Petrosian, Tigran V2712504.7% #1648.21
5 Spassky, Boris V2699513.3% #2140.59
6 Tal, Mikhail2694492.2% #2240.81
7 Mecking, Henrique2687562.6% #2825.61
8 Portisch, Lajos2686501.6% #2640.41
9 Romanishin, Oleg M2679491.2% #2925.64
10 Larsen, Bent2679501.2% #3042.49
11 Hort, Vlastimil2672480.8% #3333.64
12 Ljubojevic, Ljubomir2672511.0% #3426.83
13 Balashov, Yury S2664500.5% #3828.47
14 Geller, Efim P2664500.5% #3852.50
15 Smyslov, Vassily V2657510.4% #4256.44
16 Gufeld, Eduard E2651600.8% #5141.45
17 Tseshkovsky, Vitaly V2650490.2% #4632.93
18 Vasiukov, Evgeny A2645540.4% #5244.49
19 Savon, Vladimir A2641510.2% #5336.92
20 Gulko, Boris F2641500.1% #5430.56
21 Vaganian, Rafael A2636500.1% #5725.87
22 Kuzmin, Gennady P2633510.1% #5931.62
23 Ribli, Zoltán2632500.1% #6025.98
24 Kholmov, Ratmir D2632540.2% #6252.30
25 Gligoric, Svetozar262550 #6554.58
26 Gipslis, Aivars2625530.1% #6740.56
27 Hübner, Robert2625530.1% #6728.82
28 Sveshnikov, Evgeny E2623530.1% #6927.55
29 Evans, Larry M2620680.5% #8045.44
30 Tukmakov, Vladimir B2619510.1% #7131.46
31 Dorfman, Iosif D2617540.1% #7425.33
32 Browne, Walter S2616510.1% #7328.64
33 Bronstein, David I261351 #7753.53
34 Alburt, Lev O2612540.1% #7932.03
35 Razuvaev, Yury S261153 #7831.88
36 Dvoretsky, Mark I2608570.1% #8329.73
37 Smejkal, Jan260849 #7931.44
38 Timman, Jan H260748 #8025.71
39 Kochiev, Alexander260753 #8321.43
40 Marangunic, Srdjan2607650.2% #9033.83
41 Liberzon, Vladimir M260652 #8240.44
42 Uhlmann, Wolfgang260549 #8142.42
43 Byrne, Robert E260451 #8349.36
44 Krogius, Nikolay V2604620.1% #9047.11
45 Parma, Bruno260453 #8535.67
46 Sosonko, Gennadi260249 #8534.29
47 Miles, Anthony J260048 #8622.36
48 Sanguinetti, Raúl C260055 #8944.58
49 Dzindzichashvili, Roman Y2599600.1% #9533.32
50 Andersson, Ulf259848 #8826.18
51 Furman, Semen A259856 #9356.75
52 Panno, Oscar R259750 #9042.46
53 Gheorghiu, Florin259750 #9033.40
54 Bagirov, Vladimir K259756 #9441.04
55 Chekhov, Valery A259757 #9421.76
56 Beliavsky, Alexander G259451 #9223.71
57 Zaitsev, Igor A2593600.1% #9939.26
58 Kurajica, Bojan259351 #9429.79
59 Unzicker, Wolfgang259356 #9752.18
60 Olafsson, Fridrik259251 #9542.60
61 Taimanov, Mark E258250 #10351.57
62 Darga, Klaus V2581660.1% #11543.52
63 Kavalek, Lubomir258150 #10434.06
64 Averbakh, Yury L258164 #11455.56
65 Szabó, László258056 #11060.45
66 Nikolac, Juraj258055 #10945.36
67 Velimirovic, Dragoljub257952 #10735.30
68 Sax, Gyula257949 #10726.20
69 Kupreichik, Viktor D257654 #11228.16
70 Lein, Anatoly257459 #11746.43
71 Matanovic, Aleksandar257356 #11647.27
72 Palatnik, Semen A257261 #11927.43
73 Kapengut, Albert Z2570730.1% #12933.16
74 Bukic, Enver257055 #11839.75
75 Pfleger, Helmut256957 #12034.07
76 Klovans, Janis256961 #12342.39
77 Sakharov, A.256861 #123
78 Suetin, Alexey S256857 #12150.79
79 Torre, Eugenio256749 #11725.82
80 Matulovic, Milan256751 #11842.22
81 Najdorf, Miguel256556 #12367.38
82 Panchenko, Alexander N256462 #12823.90
83 Zakharov, Alexander V256457 #12533.89
84 Ivanov, Igor V256361 #12830.65
85 Lerner, Konstantin Z256267 #13327.51
86 Lombardy, William J256154 #12539.74
87 Nei, Iivo256160 #12945.83
88 Schmid, Lothar M2561740.1% #13749.31
89 Grigorian, Karen A256153 #12429.98
90 Commons, Kim S256164 #13226.11
91 Timoshchenko, Gennady256056 #12828.34
92 Ivkov, Borislav256051 #12443.80
93 Lutikov, Anatoly S256059 #12944.57
94 Pachmann, Ludek255454 #13353.30
95 Georgadze, Tamaz V255457 #13329.81
96 Rashkovsky, Nukhim N255052 #13531.37
97 Tarjan, James E254952 #13425.53
98 Karasev, Vladimir I254862 #14239.21
99 Malich, Burkhard G254757 #13940.76
100 Hulak, Krunoslav254553 #13826.27
101 Adorján, András254550 27.42
102 Radulov, Ivan254553 38.65
103 Schmidt, Wlodzimierz254451 34.39
104 Sigurjónsson, Gudmundur254250 29.93
105 Platonov, Igor V254274 43.62
106 Grefe, John A254257 29.98
107 Rogoff, Kenneth S254158 24.44
108 Knezevic, Milorad254153 40.83
109 Filip, Miroslav254058 48.84
110 Csom, István254050 37.25
111 Petrushin, Alexander I253861 30.47
112 Petrosian, Arshak B253557 23.71
113 Kovacevic, Vladimir253561 35.43
114 Tringov, Georgy P253457 40.48
115 Vogt, Lothar H253149 25.62
116 Hecht, Hans-Joachim252958 38.59
117 Averkin, Orest N252667 33.52
118 Makarichev, Sergey Y252664 23.79
119 Jansa, Vlastimil252450 34.76
120 Katalymov, Boris N252370
121 Suba, Mihai252256 30.25
122 Reshevsky, Samuel H252254 65.76
123 Pribyl, Josef252152 29.88
124 Schneider, Lars Ake252160
125 Suttles, Duncan252167 31.69
126 Karner, Hillar252060 42.09
127 Benko, Pal C251954 49.13
128 Knaak, Rainer F251951 24.46
129 Donner, Johannes H251852 50.15
130 Vukcevich, Milan R251758
131 Quinteros, Miguel A251650 29.68
132 Ree, Hans251650 32.95
133 Stean, Michael F251652 23.98
134 Vukic, Milan251653 34.03
135 García Gonzáles, Guillermo251554 23.73
136 Weinstein, Norman251557 26.90
137 Doroshkievich, Vladimir K251564 39.68
138 Kirov Ivanov, Nino251352 31.97
139 Díez del Corral, Jesús251169 44.40
140 Gurgenidze, Bukhuti I251166 43.80
141 Bilek, István251157 45.05
142 Hermann, Manfred251062 34.99
143 Antoshin, Vladimir S251063 48.30
144 Balinas, Rosendo Carrean250962
145 Faragó, Iván250850 31.41
146 Keene, Raymond250651
147 Shamkovich, Leonid A250557 54.25
148 Radev, Nikolai250561 38.70
149 Karaklajic, Nikola250362 51.52
150 Peters, John A250358 26.56
151 Regan, Kenneth250364 17.96
152 Tatai, Stefano250251 39.44
153 Dueball, Juergen250266 32.42
154 Rajkovic, Dusan250156 35.21
155 Schweber, Samuel249957 41.12
156 Soltis, Andrew E249959 30.26
157 Lukin, Andrei M249874 29.01
158 Barczay, Laszlo249750 41.53
159 Ghitescu, Theodor249655 43.60
160 Simic, Radoslav249566 29.23
161 Sanguinetti, Renato249560 61.36
162 Ciocaltea, Victor249255 45.62
163 Vadasz, Laszlo249251 29.59
164 Kaplan, Julio P249253 27.10
165 Nemet, Ivan249162 34.38
166 Calvo Minguez, Ricardo249161 33.85
167 Gaprindashvili, Nona249161 36.33
168 Spassov, Liuben249054 34.44
169 Pereszupkin, Alexander248964
170 Rodriguez, Ruben248872 30.73
171 Hartston, William R248753 30.05
172 Ghizdavu, Dumitru248662 28.28
173 Portisch, Ferenc248456 38.39
174 Mariotti, Sergio248453 31.06
175 Damjanovic, Mato248454 50.44
176 Forintos, Gyözö V248355 42.09
177 Zuckerman, Bernard248359 34.42
178 Kraidman, Yair248358 44.83
179 Rath, Ulrik248266 30.68
180 Mohrlok, Dieter248267
181 Eolian, Levon S248073 17.95
182 Szekely, Peter247959 22.56
183 Christiansen, Larry M247855 21.18
184 Bleiman, Yaacov247875 29.97
185 Podgaets, Mikhail Y247766 30.11
186 Stoica, Valentin247763 27.54
187 Ciric, Dragoljub M247666 41.80
188 Espig, Lutz247652 28.65
189 Marovic, Dražen247655 39.63
190 Padevsky, Nikola B247657 44.26
191 Efimov, Igor247673 16.95
192 Botterill, George Steven247557
193 Johannsson, Ingi Randver247466
194 Planinc, Albin247451 33.37
195 Biyiasas, Peter247356 26.78
196 Hazai, Laszlo247353 24.21
197 Rodriguez, Amador247257 20.97
198 Brasket, Curt Justin247267
199 Antunac, Goran247164 32.37
200 Nunn, John D M247057 22.35
201 Mestrovic, Zvonimir246963 32.87
202 Dely, Peter246859 43.15
203 Raicevic, Vladimir246857 28.33
204 Cvetkovic, Srdjan246768 31.51
205 Lakic, Nikola246764 30.12
206 Sofrevski, Jovan246669 42.04
207 Pintér, József246652 23.81
208 Gerusel, Mathias246656 39.57
209 Hamann, Svend246671 36.89
210 Barle, Janez246454 25.44
211 Kozlov, V.246464
212 Lputian, Smbat G246373 19.55
213 Sahovic, Dragutin246358 37.06
214 Jansson, Borje246369 35.47
215 Vladimirov, Evgeny Y246263 20.61
216 Cosulich, Roberto246170
217 Westerinen, Heikki MJ246152 33.34
218 Janoševic, Dragoljub246159 54.15
219 Mnatsakanian, Eduard A246167 38.73
220 Van Wijgerden, Cornelis246056 27.27
221 Martz, William E246063
222 Szmetan, Jorge245954 27.26
223 Hernandez, Roman245953 27.77
224 Zilberstein, Valery I245775 34.38
225 Anikaev, Yury245567 29.17
226 Lengyel, Levente245561 44.22
227 Castro Rojas, Oscar Humberto245552 24.31
228 Hug, Werner245453 24.97
229 Bohosjan, Sarkis245364 36.43
230 Honfi, Karoly245354 46.84
231 Řgaard, Leif245260 25.65
232 Robatsch, Karl245157 48.87
233 Ermenkov, Evgenij245056 27.92
234 Garcia Martinez, Silvino245058 33.16
235 Prandstetter, Eduard244956 28.71
236 Augustin, Josef244952 35.29
237 Dueckstein, Andreas244867 50.08
238 Popov, Luben244755 41.59
239 Kuijpers, Franciscus Antonius244765
240 Martinovic, Slobodan244758 32.10
241 Ungureanu, Emil244766 40.83
242 Mednis, Edmar J244556 40.44
243 Minic, Dragoljub244559 40.49
244 Ignatiev, Felix N244572 45.64
245 Bisguier, Arthur B244556 47.89
246 Haag, Ervin244466 44.64
247 Langeweg, Kick244454 40.48
248 Rukavina, Josip244454 34.76
249 Krnic, Zdenko244472 29.91
250 Poutiainen, Pertti244357
251 Sydor, Andrzej244358 40.66
252 Khalikian, Ovik244273
253 Meduna, Eduard244259 26.97
254 Jakobsen, Ole244274 34.86
255 Pomar Salamanca, Arturo244155 45.99
256 Bohm, Hans244051 27.63
257 Rodriguez Vargas, Orestes244060 34.16
258 Bednarski, Jacek B244055 38.47
259 Toth, Bela244064 34.37
260 McKay, Roderick M244074 25.55
261 Kagan, Shimon244054 35.40
262 Matera, Salvatore Joseph243955
263 Barcza, Gedeon243962 66.03
264 Petkevich, Jusefs243869 36.70
265 Malevinsky, Alexander A243870 27.51
266 Lederman, Leon243863 30.27
267 Ligterink, Gert243852 27.79
268 Diesen, Mark C243855
269 Estrin, Yacov B243767 54.36
270 Webb, Simon243553 28.22
271 Minev, Nikolay N243574 46.65
272 Doda, Zbigniew243555 46.53
273 Flesch, Janos243558 43.91
274 Messing, Hrvoje243466 37.10
275 Hase, Juan Carlos243367
276 Witkowski, Stefan243366 45.92
277 Guimard, Carlos E243364 64.40
278 Bellin, Robert243357 25.17
279 Grinberg, Ricardo243268 29.63
280 Ornstein, Axel243251 25.35
281 Ostojic, Predrag243253 39.53
282 Buljovcic, Ivan243170 40.68
283 Gutman, Lev243159 31.92
284 Brond, Victor243166
285 Eising, Johannes243064 42.25
286 Adamski, Jan242952 33.80
287 Rogulj, Branko242967 26.08
288 Haygarth, Michael J242974
289 Yanofsky, Daniel A242967 52.43
290 Popov, Nikolay242867
291 Rubinetti, Jorge A242754 32.42
292 Garcia, Raimundo242657 41.26
293 Liebert, Heinz242453 41.27
294 Spiridonov, Nikola242453 39.51
295 Pytel, Krzysztof242456 32.29
296 Cobo Arteaga, Eldis242370
297 Partos, Charles242261 41.06
298 Kovacs, Laszlo M242161 38.90
299 Plachetka, Jan242153 32.54
300 Rohde, Michael A242161 18.01
301 Williams, Arthur Howard242065
302 Lukacs, Peter241855 27.14
303 Rossetto, Héctor D241856 54.97
304 Hartoch, Robert G241855
305 Jelen, Iztok241864 30.62
306 Pritchett, Craig William241760
307 Sznapik, Aleksander241755 26.56
308 Ostermeyer, Peter241664 33.88
309 Ivanovic, Božidar241557 31.02
310 Podzielny, Karl Heinz241574 22.97
311 Lechtynsky, Jiri241556 29.77
312 Vaisman, Volodia241560 39.68
313 Soos, Bela241568 47.48
314 Rajna, George241560 30.55
315 van Scheltinga, Tjeerd D241471 63.48
316 Marjanovic, Slavoljub241463 22.65
317 Bertok, Mario241466 47.99
318 Pokojowczyk, Jerzy241454 28.53
319 Basman, Michael J241362 31.46
320 Enklaar, Bertus F241359
321 Jamieson, Robert Murray241264
322 Wockenfuss, Klaus241261 26.01
323 Bukal, Vladimir Sr241265 37.83
324 Moehring, Guenther241154 40.77
325 Kestler, Hans-Günter241157 37.72
326 Penrose, Jonathan241071 43.89
327 Sunye Neto, Jaime240967 20.33
328 Zwaig, Arne240858
329 Deze, Anton240761
330 Peev, Peicho Chonev240760 37.41
331 Gliksman, Darko240769 39.90
332 Akvist, Hakan240665 35.84
333 Nicevski, Risto240660 32.18
334 Ilievski, Dimitar240566 36.02
335 Filipowicz, Andrzej240557 39.30
336 Kristiansen, Jens240574 25.27
337 Denker, Arnold S240569 63.53
338 Wirthensohn, Heinz240456 26.32
339 Garcia, R.240369
340 Balduzzi, Reynaldo240369
341 Trapl, Jindrich240262 35.44
342 Bronstein, Luis240158 31.25
343 Bönsch, Uwe240155 18.87
344 Neckar, Lubomir240163 27.08
345 Debarnot, Roberto240157 30.07
346 Pohla, Harry240162 37.16
347 Hindle, Owen M240073 37.46
348 Dake, Arthur William239967 67.40
349 Lehmann, Heinz Dr239971
350 Goodman, David SC239961
351 Cuartas, Carlos239863 37.04
352 Ghinda, Mihail Viorel239875 28.10
353 Pavlov, Mircea239773 39.96
354 Mestel, A Jonathan239759 20.47
355 Zichichi, Alvise239567 39.16
356 Cuasnicu, Oscar239559 34.85
357 De la Vega, Hector239470 51.46
358 Rocha, Antonio239461 33.22
359 Garcia Padron, Jose239457 19.44
360 Schinzel, Wladyslaw239254 34.28
361 Andre, Wolfgang239275 24.45
362 Eslon, Jaan238967 25.49
363 Wade, Robert Graham238770
364 Gesos, Pavlos238773 32.27
365 Silva, Fernando238663 27.07
366 Van Riemsdijk, Herman C238660 29.01
367 Navarovszky, Laszlo238671 44.41
368 Visier Segovia, Fernando238657 34.58
369 Ftácnik, Lubomír238560 19.83
370 Sapi, Laszlo238559 42.45
371 Kinnmark, Ove238569 32.69
372 Harandi, Khosro238563 26.99
373 Seirawan, Yasser238367 17.44
374 Huss, Andreas238261 26.87
375 Rosenlund, Thorbjorn238075 26.20
376 Gasic, Bozidar238065 39.88
377 Formanek, Edward W237966 35.32
378 Kozma, Julius237963 48.25
379 Heuer, Valter237862 49.13
380 Banas, Jan237755 30.24
381 Horvath, Tamas237757 25.85
382 Rayner, Emmanuel237574 19.22
383 Bjelajac, Milan237465 29.46
384 Lombard, Andre237455 26.94
385 Iskov, Gert237467 29.09
386 Ervin, Roy C237466 26.66
387 Speelman, Jonathan S237268 20.91
388 Garcia, Wilfredo237173 22.77
389 Mihaljcisin, Mihajlo237064 44.53
390 Emma, Jaime J236963 39.62
391 Tompa, Janos236956 30.34
392 Zinn, Lothar236963 39.45
393 Bellon Lopez, Juan Manuel236853 27.31
394 Mascarinas, Rico236862 24.50
395 Kostro, Jerzy236860 40.60
396 De Bruycker, Bernard236875 36.21
397 Levy, David Neil Lawrence236868
398 Czerniak, Moshe236769 67.58
399 Whiteley, Andrew J236759 30.23
400 Akopian, Gagik236773 36.12
401 Szymczak, Zbigniew236658 25.66
402 Ek, Hans236571 48.90
403 Alexandria, Nana236474 27.88
404 Sibarevic, Milenko236464 32.47
405 Macles, Jacques236466 32.15
406 Lanc, Alois236267 29.54
407 Corden, Martyn J236265
408 Haik, Aldo235965 24.86
409 Trabattoni, Franco235975 21.30
410 Grabczewski, Romuald235872 45.57
411 Casas, Fernando235773 51.03
412 Tan Lian Ann235766
413 Sikora Lerch, Jan235757
414 Holm, Sejer235675 38.06
415 Donchenko, Anatoly G235568 36.99
416 Segal, Alexandru Sorin235563 29.90
417 Spacek, Petr235573 23.51
418 Dieks, Roy G235473 21.58
419 Heinicke, Herbert T235369 72.46
420 Estevez Morales, Guillermo235155
421 Fichtl, Jirí235059 56.54
422 Kristiansen, Erling234972 40.71
423 Taulbut, Shaun M234771 19.64
424 Rantanen, Yrjo A234770 27.36
425 Van Baarle, C John234663 32.37
426 Boersma, Paulus A234663 29.12
427 Szilágyi, György234659 56.16
428 De Greif, Boris234671 47.55
429 Maciejewski, Andrzej234563 26.14
430 Cording, Harm234567 40.64
431 Boudy, Julio234465 26.22
432 Onat, Ilhan234471 47.74
433 Fedorowicz, John P234359 18.92
434 Brkljaca, Ante234368 23.81
435 Cardoso, Radolfo Tan234267
436 Eperjesi, Laszlo234262 34.29
437 Kluger, Guyla234062 63.63
438 Knox, Victor W233967 32.61
439 Rostalski, Walter233869 24.65
440 Baumbach, Friedrich233762 41.97
441 Rigo, Janos233763 28.84
442 Trois, Francisco RT233759
443 Jancev, Lazo233671
444 Schussler, Harry233675 20.19
445 Petran, Pal233654 30.95
446 Manasterski, Lutoslaw233571 40.56
447 Kushnir, Alla233471
448 Fuller, Maxwell L233463 32.59
449 Garcia Palermo, Carlos233362 23.75
450 Hutchings, Stuart J233373
451 Clemens, Christian233265 37.07
452 Gruenberg, Hans Ulrich233161 21.64
453 Brondum, Eric233171 35.71
454 Bernard, Ryszard233070 33.03
455 Pesantes Carbajal, Carlos232971
456 Hesse, Peter232775 32.92
457 Kuligowski, Adam232768 21.69
458 Borkowski, Franciszek232665 20.08
459 Franco Ocampos, Zenon232665 21.30
460 Mueller, Klaus Uwe232659
461 Schaufelberger, Heinz232568 29.78
462 Van der Vliet, Fredrik232460
463 Hoen, Ragnar232375 36.90
464 Taruffi, Daniele232375 18.98
465 Camara, Helder232363 40.57
466 Povah, Nigel E232265 25.12
467 Kollberg, Lothar232267
468 Cleghorn, Peter232074
469 Verduga, Denis Homero232069
470 Kaiszauri, Konstanty231973 24.84
471 Franzen, Jozef231963 31.57
472 Rumens, David E231959 37.93
473 Braun, Gottfried231765 44.17
474 Govedarica, Radovan231759 29.55
475 Seidler, Aldo231760
476 Nowak, Ignacy231666 28.64
477 Gereben, Ernö231672 70.20
478 Van der Sterren, Paul231459 21.46
479 Lambert, Glenn EJ231462
480 Medina García, Antonio A231471 57.91
481 Martin Gonzalez, Angel231158 24.66
482 Fedder, Steen231176 26.21
483 Jankovec, Ivan231161 38.87
484 Thomas, Richard231175
485 Fraguela Gil, Jose Miguel231160
486 Tisdall, Jonathan D230975 19.01
487 Day, Lawrence A230866 28.58
488 Dietze, Wolfgang230861 27.20
489 Schmidt, Bodo230673 27.36
490 Olafsson, Helgi230661 21.04
491 Paehtz, Thomas Sr230568 20.98
492 Petran, Peter230457 23.02
493 Cibulka, Vladimir230465 35.83
494 Menvielle Lacourrelle, Augusto230465 39.05
495 Blackstock, Lesly SF230462
496 Novak, Ivan230358 34.60
497 Drvota, Antonin230266
498 Alster, Ladislav230266 50.41
499 Cafferty, Bernard230160 43.18
500 Diaz, Joaquin C229761 29.15

These ratings, calculated as of August 31, 1977, incorporate all games (against rated opponents) played in the time between September 1, 1976 and August 31, 1977, along with the ratings that were already calculated as of August 31, 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 August 31, 1977. This represents the player's estimated strength on September 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 September 1, 1977. The +/- value represents the standard deviation of that estimate; the player's true strength on September 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 September 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 August 31, 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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