< April 30, 1977     Back to date list    August 31, 1977 >

Top 10 active players as of June 30, 1977

  #  

Player Rating +/-
1 Karpov, Anatoly E278548
2 Polugaevsky, Lev A272750
3 Korchnoi, Viktor L271950
4 Petrosian, Tigran V270749
5 Portisch, Lajos269950
6 Tal, Mikhail269148
7 Mecking, Henrique268854
8 Spassky, Boris V268652
9 Larsen, Bent267949
10 Romanishin, Oleg M267649

About these ratings

Top 500 active players as of June 30, 1977

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E27854852.4% #326.10
2 Polugaevsky, Lev A27275010.4% #1142.61
3 Korchnoi, Viktor L2719508.0% #1346.27
4 Petrosian, Tigran V2707495.0% #1648.04
5 Portisch, Lajos2699503.7% #2040.24
6 Tal, Mikhail2691482.2% #2240.64
7 Mecking, Henrique2688543.0% #2525.44
8 Spassky, Boris V2686522.5% #2540.42
9 Larsen, Bent2679491.5% #2842.32
10 Romanishin, Oleg M2676491.2% #2925.47
11 Hort, Vlastimil2674491.2% #3033.47
12 Ljubojevic, Ljubomir2670501.0% #3226.66
13 Balashov, Yury S2662490.6% #3628.30
14 Smyslov, Vassily V2658500.5% #3956.27
15 Geller, Efim P2656500.5% #4052.33
16 Tseshkovsky, Vitaly V2651490.3% #4332.76
17 Gufeld, Eduard E2648601.0% #5041.28
18 Gulko, Boris F2640500.2% #5130.39
19 Savon, Vladimir A2638500.2% #5336.76
20 Kholmov, Ratmir D2635550.3% #5752.13
21 Kuzmin, Gennady P2635520.2% #5631.45
22 Vaganian, Rafael A2631500.1% #5825.71
23 Hübner, Robert2630520.2% #6028.65
24 Ribli, Zoltán2629500.1% #5925.81
25 Vasiukov, Evgeny A2627560.3% #6344.32
26 Gipslis, Aivars2622540.2% #6740.39
27 Sveshnikov, Evgeny E2620530.1% #6827.38
28 Chekhov, Valery A2620570.2% #7121.59
29 Evans, Larry M2619680.6% #7745.27
30 Gligoric, Svetozar2612500.1% #7454.41
31 Dorfman, Iosif D2610540.1% #7725.16
32 Andersson, Ulf261048 #7426.01
33 Smejkal, Jan261049 #7531.27
34 Razuvaev, Yury S2608530.1% #7931.72
35 Timman, Jan H260748 #7725.54
36 Dvoretsky, Mark I2606570.1% #8329.56
37 Marangunic, Srdjan2604650.2% #9033.66
38 Byrne, Robert E260351 #8249.19
39 Krogius, Nikolay V2602620.1% #8946.93
40 Liberzon, Vladimir M260251 #8340.27
41 Parma, Bruno2601530.1% #8435.50
42 Kochiev, Alexander260153 #8521.26
43 Panno, Oscar R260051 #8542.29
44 Browne, Walter S259950 #8528.47
45 Dzindzichashvili, Roman Y2598600.1% #9233.15
46 Uhlmann, Wolfgang259749 #8542.25
47 Sosonko, Gennadi259649 #8734.12
48 Gheorghiu, Florin259550 #8833.23
49 Bagirov, Vladimir K259557 #9340.87
50 Furman, Semen A259556 #9356.58
51 Zaitsev, Igor A2593600.1% #9739.09
52 Lein, Anatoly2592650.2% #10046.26
53 Bronstein, David I259252 #9353.36
54 Unzicker, Wolfgang259155 #9552.01
55 Sanguinetti, Raúl C259053 #9544.41
56 Kavalek, Lubomir258950 #9333.88
57 Tukmakov, Vladimir B258951 #9531.29
58 Beliavsky, Alexander G258851 #9623.54
59 Kurajica, Bojan258751 #9629.62
60 Olafsson, Fridrik258650 #9642.43
61 Miles, Anthony J258548 #9622.19
62 Taimanov, Mark E258550 #9951.40
63 Velimirovic, Dragoljub258051 #10335.13
64 Averbakh, Yury L258058 #10755.39
65 Sax, Gyula258049 #10226.03
66 Darga, Klaus V2579670.1% #11343.35
67 Kupreichik, Viktor D257854 #10727.98
68 Alburt, Lev O257755 #10831.85
69 Szabó, László257455 #11060.28
70 Pfleger, Helmut257256 #11433.89
71 Kapengut, Albert Z2569740.2% #12732.98
72 Palatnik, Semen A256861 #12027.26
73 Torre, Eugenio256750 #11425.65
74 Sakharov, A.256661 #122
75 Bukic, Enver256555 #12039.58
76 Matulovic, Milan256451 #11842.05
77 Lerner, Konstantin Z256461 #12427.34
78 Najdorf, Miguel256256 #12267.21
79 Panchenko, Alexander N256262 #12723.73
80 Klovans, Janis256159 #12642.22
81 Nikolac, Juraj256054 #12445.19
82 Ivanov, Igor V256061 #12830.48
83 Matanovic, Aleksandar255954 #12547.10
84 Ivkov, Borislav255951 #12343.63
85 Suetin, Alexey S255954 #12550.62
86 Lombardy, William J255954 #12539.57
87 Timoshchenko, Gennady255955 #12628.17
88 Grigorian, Karen A255853 #12529.81
89 Nei, Iivo255760 #12945.66
90 Commons, Kim S255764 #13225.93
91 Schmid, Lothar M2557740.1% #13849.14
92 Karasev, Vladimir I255661 #13139.04
93 Csom, István255650 #12537.08
94 Lutikov, Anatoly S255357 #13144.40
95 Hulak, Krunoslav254852 #13326.10
96 Tarjan, James E254752 #13425.36
97 Quinteros, Miguel A254751 #13329.51
98 Rashkovsky, Nukhim N254452 #13631.20
99 Adorján, András254450 #13527.25
100 Malich, Burkhard G254357 #13940.59
101 Radulov, Ivan254253 38.48
102 Sigurjónsson, Gudmundur254149 29.76
103 Platonov, Igor V254074 43.45
104 Knezevic, Milorad253953 40.66
105 Schmidt, Wlodzimierz253751 34.22
106 Petrushin, Alexander I253661 30.30
107 Pachmann, Ludek253653 53.13
108 Filip, Miroslav253661 48.67
109 Rogoff, Kenneth S253454 24.27
110 Shamkovich, Leonid A253360 54.08
111 Tringov, Georgy P253355 40.31
112 Petrosian, Arshak B253357 23.54
113 Kovacevic, Vladimir253261 35.26
114 Grefe, John A253061 29.81
115 Averkin, Orest N252967 33.35
116 Hecht, Hans-Joachim252558 38.42
117 Vogt, Lothar H252350 25.45
118 Kirov Ivanov, Nino252352 31.81
119 Georgadze, Tamaz V252357 29.64
120 Zakharov, Alexander V252261 33.73
121 Katalymov, Boris N252070
122 Suba, Mihai252057 30.08
123 Suttles, Duncan251767 31.52
124 Makarichev, Sergey Y251760 23.62
125 Jansa, Vlastimil251750 34.59
126 Karner, Hillar251760 41.92
127 Balinas, Rosendo Carrean251759
128 Vukcevich, Milan R251658
129 Benko, Pal C251454 48.95
130 Knaak, Rainer F251351 24.29
131 Vukic, Milan251256 33.86
132 Faragó, Iván251250 31.24
133 Doroshkievich, Vladimir K251263 39.51
134 Pribyl, Josef251253 29.72
135 Díez del Corral, Jesús251163 44.23
136 Vadasz, Laszlo251052 29.42
137 García Gonzáles, Guillermo251054 23.56
138 Calvo Minguez, Ricardo251062 33.69
139 Gurgenidze, Bukhuti I250866 43.63
140 Antoshin, Vladimir S250863 48.13
141 Donner, Johannes H250851 49.98
142 Bilek, István250855 44.88
143 Reshevsky, Samuel H250755 65.59
144 Ree, Hans250750 32.79
145 Hermann, Manfred250762 34.83
146 Weinstein, Norman250655 26.74
147 Soltis, Andrew E250664 30.09
148 Spassov, Liuben250658 34.27
149 Radev, Nikolai250161 38.53
150 Stean, Michael F250052 23.82
151 Regan, Kenneth249964 17.80
152 Keene, Raymond249951
153 Tatai, Stefano249850 39.27
154 Dueball, Juergen249866 32.25
155 Schweber, Samuel249657 40.95
156 Lukin, Andrei M249574 28.83
157 Plachetka, Jan249354 32.37
158 Sanguinetti, Renato249160 61.19
159 Simic, Radoslav249166 29.06
160 Barczay, Laszlo249051 41.36
161 Rath, Ulrik249067 30.51
162 Kaplan, Julio P248953 26.92
163 Nemet, Ivan248961 34.21
164 Rajkovic, Dusan248956 35.04
165 Stoica, Valentin248863 27.37
166 Christiansen, Larry M248858 21.01
167 Karaklajic, Nikola248763 51.35
168 Peters, John A248762 26.39
169 Pereszupkin, Alexander248764
170 Ciocaltea, Victor248654 45.45
171 Mariotti, Sergio248652 30.88
172 Gaprindashvili, Nona248560 36.16
173 Hartston, William R248554 29.88
174 Espig, Lutz248353 28.48
175 Ghitescu, Theodor248360 43.43
176 Rodriguez, Ruben248166 30.56
177 Padevsky, Nikola B248058 44.09
178 Eolian, Levon S247973 17.79
179 Podgaets, Mikhail Y247966 29.93
180 Schneider, Lars Ake247861
181 Planinc, Albin247751 33.20
182 Mohrlok, Dieter247767
183 Forintos, Gyözö V247755 41.91
184 Ghizdavu, Dumitru247673 28.11
185 Ciric, Dragoljub M247466 41.63
186 Kraidman, Yair247458 44.66
187 Bleiman, Yaacov247375 29.81
188 Efimov, Igor247273 16.79
189 Johannsson, Ingi Randver247266
190 Marovic, Dražen247155 39.46
191 Antunac, Goran246964 32.20
192 Rodriguez, Amador246857 20.81
193 Biyiasas, Peter246854 26.61
194 Nunn, John D M246857 22.18
195 Hamann, Svend246871 36.73
196 Brasket, Curt Justin246867
197 Barle, Janez246755 25.27
198 Damjanovic, Mato246554 50.27
199 Janoševic, Dragoljub246459 53.97
200 Sofrevski, Jovan246469 41.86
201 Garcia Martinez, Silvino246456 32.98
202 Lputian, Smbat G246373 19.38
203 Cvetkovic, Srdjan246368 31.34
204 Mestrovic, Zvonimir246264 32.70
205 Gerusel, Mathias246256 39.40
206 Spiridonov, Nikola246254 39.34
207 Robatsch, Karl246260 48.71
208 Řgaard, Leif246259 25.48
209 Portisch, Ferenc246160 38.22
210 Flesch, Janos246165 43.75
211 Kozlov, V.246164
212 Sahovic, Dragutin246158 36.89
213 Van Wijgerden, Cornelis246055 27.10
214 Hazai, Laszlo245955 24.04
215 Mnatsakanian, Eduard A245867 38.56
216 Vladimirov, Evgeny Y245863 20.44
217 Szmetan, Jorge245654 27.09
218 Martz, William E245663
219 Cosulich, Roberto245670
220 Zuckerman, Bernard245564 34.25
221 Zilberstein, Valery I245475 34.21
222 Raicevic, Vladimir245358 28.16
223 Popov, Luben245253 41.42
224 Anikaev, Yury245267 29.00
225 Szekely, Peter245160 22.39
226 Lengyel, Levente245161 44.05
227 Kestler, Hans-Günter245062 37.55
228 Honfi, Karoly245053 46.68
229 Kuijpers, Franciscus Antonius245065
230 Westerinen, Heikki MJ244951 33.17
231 Botterill, George Steven244959
232 Bohosjan, Sarkis244864 36.26
233 Ostojic, Predrag244856 39.36
234 Jansson, Borje244768 35.30
235 Mednis, Edmar J244655 40.27
236 Pintér, József244653 23.64
237 Martinovic, Slobodan244458 31.92
238 Langeweg, Kick244453 40.31
239 Goodman, David SC244360
240 Minic, Dragoljub244359 40.32
241 Poutiainen, Pertti244357
242 Dueckstein, Andreas244267 49.90
243 Bednarski, Jacek B244257 38.30
244 Khalikian, Ovik244173
245 Krnic, Zdenko244172 29.74
246 Ungureanu, Emil244166 40.66
247 Dely, Peter244166 42.98
248 Jakobsen, Ole244169 34.70
249 Hug, Werner243955 24.80
250 Augustin, Josef243953 35.12
251 Lakic, Nikola243964 29.95
252 Haag, Ervin243861 44.47
253 Bohm, Hans243851 27.46
254 Rodriguez Vargas, Orestes243760 33.98
255 Bisguier, Arthur B243756 47.73
256 Ermenkov, Evgenij243754 27.75
257 Sydor, Andrzej243658 40.49
258 Petkevich, Jusefs243669 36.53
259 Malevinsky, Alexander A243670 27.34
260 Ligterink, Gert243551 27.62
261 Castro Rojas, Oscar Humberto243553 24.14
262 Pomar Salamanca, Arturo243554 45.83
263 Ignatiev, Felix N243564 45.47
264 McKay, Roderick M243473 25.38
265 Lederman, Leon243463 30.10
266 Hernandez, Roman243454 27.60
267 Haygarth, Michael J243369
268 Pritchett, Craig William243363
269 Toth, Bela243364 34.20
270 Minev, Nikolay N243274 46.48
271 Estrin, Yacov B243267 54.19
272 Rukavina, Josip243157 34.59
273 Liebert, Heinz243154 41.10
274 Webb, Simon243156 28.05
275 Witkowski, Stefan243066 45.76
276 Messing, Hrvoje243066 36.92
277 Hase, Juan Carlos243067
278 Guimard, Carlos E243064 64.23
279 Prandstetter, Eduard242961 28.54
280 Grinberg, Ricardo242968 29.46
281 Horner, Jeff242968 27.84
282 Eising, Johannes242962 42.08
283 Gutman, Lev242859 31.76
284 Buljovcic, Ivan242870 40.51
285 Brond, Victor242866
286 Rogulj, Branko242767 25.91
287 Matera, Salvatore Joseph242757
288 Popov, Nikolay242667
289 Yanofsky, Daniel A242567 52.26
290 Kagan, Shimon242557 35.23
291 Williams, Arthur Howard242471
292 Rubinetti, Jorge A242454 32.25
293 Deze, Anton242471
294 Garcia, Raimundo242357 41.09
295 Cobo Arteaga, Eldis242170
296 Diesen, Mark C242058
297 Adamski, Jan241953 33.63
298 Pytel, Krzysztof241956 32.12
299 Hartoch, Robert G241854
300 Rohde, Michael A241861 17.84
301 Doda, Zbigniew241753 46.36
302 Ivanovic, Božidar241661 30.84
303 Rossetto, Héctor D241556 54.81
304 Ornstein, Axel241552 25.18
305 Penrose, Jonathan241472 43.73
306 Lechtynsky, Jiri241459 29.60
307 van Scheltinga, Tjeerd D241271 63.31
308 Ostermeyer, Peter241264 33.72
309 Soos, Bela241268 47.31
310 Enklaar, Bertus F241159
311 Nicevski, Risto241159 32.01
312 Jelen, Iztok241164 30.45
313 Marjanovic, Slavoljub241163 22.48
314 Moehring, Guenther241054 40.60
315 Podzielny, Karl Heinz241074 22.80
316 Vaisman, Volodia241060 39.51
317 Bertok, Mario241066 47.83
318 Basman, Michael J240961 31.29
319 Sunye Neto, Jaime240867 20.16
320 Wockenfuss, Klaus240861 25.83
321 Sznapik, Aleksander240855 26.39
322 Bellin, Robert240758 24.99
323 Jamieson, Robert Murray240664
324 Zwaig, Arne240458
325 Ilievski, Dimitar240366 35.84
326 Bukal, Vladimir Sr240265 37.66
327 Peev, Peicho Chonev240260 37.24
328 Gliksman, Darko240269 39.73
329 Denker, Arnold S240269 63.36
330 Balduzzi, Reynaldo240069
331 Garcia, R.240069
332 Kovacs, Laszlo M239966 38.73
333 De Bruycker, Bernard239969 36.04
334 Filipowicz, Andrzej239865 39.13
335 Bronstein, Luis239858 31.08
336 Debarnot, Roberto239857 29.89
337 Neckar, Lubomir239763 26.90
338 Akvist, Hakan239765 35.67
339 Dake, Arthur William239767 67.23
340 Lehmann, Heinz Dr239771
341 Pohla, Harry239762 36.98
342 Cuartas, Carlos239563 36.87
343 Bönsch, Uwe239554 18.71
344 Sloth, Jorn239472 32.82
345 Lukacs, Peter239460 26.97
346 Visier Segovia, Fernando239359 34.41
347 Ghinda, Mihail Viorel239375 27.92
348 Cuasnicu, Oscar239259 34.68
349 Tompa, Janos239259 30.17
350 De la Vega, Hector239170 51.29
351 Rocha, Antonio239161 33.05
352 Zichichi, Alvise239067 38.98
353 Pavlov, Mircea238875 39.79
354 Meduna, Eduard238768 26.80
355 Mestel, A Jonathan238558 20.30
356 Andre, Wolfgang238575 24.28
357 Van Riemsdijk, Herman C238360 28.84
358 Wade, Robert Graham238369
359 Gesos, Pavlos238373 32.10
360 Ftácnik, Lubomír238360 19.67
361 Silva, Fernando238359 26.90
362 Harandi, Khosro238358 26.83
363 Kinnmark, Ove238067 32.52
364 Sapi, Laszlo237959 42.28
365 Kozma, Julius237963 48.08
366 Bellon Lopez, Juan Manuel237952 27.14
367 Garcia Padron, Jose237860 19.27
368 Seirawan, Yasser237767 17.27
369 Formanek, Edward W237666 35.15
370 Navarovszky, Laszlo237663 44.24
371 Gasic, Bozidar237565 39.72
372 Bjelajac, Milan237265 29.29
373 Eslon, Jaan237267 25.32
374 Ervin, Roy C237266 26.49
375 Kostro, Jerzy237268 40.43
376 Wirthensohn, Heinz237261 26.15
377 Szymczak, Zbigniew237157 25.49
378 Rayner, Emmanuel237176 19.05
379 Iskov, Gert237067 28.92
380 Garcia, Wilfredo236873 22.60
381 Sibarevic, Milenko236764 32.30
382 Heuer, Valter236762 48.95
383 Pokojowczyk, Jerzy236656 28.36
384 Zinn, Lothar236663 39.28
385 Emma, Jaime J236663 39.45
386 Banas, Jan236658 30.07
387 Akopian, Gagik236673 35.94
388 Czerniak, Moshe236669 67.41
389 Lombard, Andre236656 26.78
390 Ek, Hans236468 48.73
391 Levy, David Neil Lawrence236367
392 Maciejewski, Andrzej236259 25.97
393 Whiteley, Andrew J236258 30.06
394 Alexandria, Nana236174 27.71
395 Macles, Jacques236166 31.97
396 Eley, Brian236076
397 Mihaljcisin, Mihajlo236065 44.36
398 Corden, Martyn J235965
399 Lanc, Alois235967 29.37
400 Tan Lian Ann235860
401 Hindle, Owen M235775 37.29
402 Haik, Aldo235465 24.70
403 Casas, Fernando235473 50.85
404 Petran, Pal235456 30.79
405 Knox, Victor W235369 32.44
406 Dieks, Roy G235373 21.41
407 Segal, Alexandru Sorin235363 29.74
408 Trapl, Jindrich235274 35.27
409 Holm, Sejer235274 37.88
410 Donchenko, Anatoly G235268 36.83
411 Rosenlund, Thorbjorn235169 26.03
412 Spacek, Petr235173 23.34
413 Heinicke, Herbert T234969 72.29
414 Van Baarle, C John234961 32.20
415 Grabczewski, Romuald234871 45.40
416 Estevez Morales, Guillermo234755
417 Fichtl, Jirí234759 56.37
418 Speelman, Jonathan S234563 20.74
419 Rantanen, Yrjo A234470 27.19
420 Trabattoni, Franco234475 21.13
421 Manasterski, Lutoslaw234471 40.39
422 Fuller, Maxwell L234464 32.42
423 De Greif, Boris234371 47.38
424 Szilágyi, György234259 55.98
425 Schinzel, Wladyslaw234156 34.11
426 Cording, Harm234167 40.47
427 Onat, Ilhan234171 47.57
428 Liljedahl, Lennart234073 29.84
429 Cardoso, Radolfo Tan233967
430 Wahlbom, Magnus233874 32.12
431 Boersma, Paulus A233663 28.95
432 Kluger, Guyla233662 63.46
433 Kushnir, Alla233571
434 Eperjesi, Laszlo233562 34.12
435 Rostalski, Walter233569 24.48
436 Baumbach, Friedrich233462 41.81
437 Trois, Francisco RT233459
438 Van der Vliet, Fredrik233460
439 Jancev, Lazo233371
440 Horvath, Tamas233361 25.69
441 Martin Gonzalez, Angel233262 24.49
442 Hutchings, Stuart J233272
443 Ludgate, Alan233271 31.83
444 Clemens, Christian233165 36.89
445 Kristiansen, Erling233166 40.54
446 Garcia Palermo, Carlos233062 23.58
447 Jankovec, Ivan233071 38.70
448 Boudy, Julio233060 26.05
449 Kuligowski, Adam232962 21.52
450 Gruenberg, Hans Ulrich232861 21.47
451 Sikora Lerch, Jan232765
452 Rigo, Janos232663 28.67
453 Bielczyk, Jacek232556 24.35
454 Pesantes Carbajal, Carlos232471
455 Bernard, Ryszard232470 32.85
456 Hesse, Peter232475 32.75
457 Van der Sterren, Paul232458 21.29
458 Brkljaca, Ante232469 23.64
459 Franco Ocampos, Zenon232365 21.13
460 Mueller, Klaus Uwe232159
461 Schaufelberger, Heinz232068 29.61
462 Camara, Helder232063 40.40
463 Cleghorn, Peter231774
464 Fedder, Steen231769 26.04
465 Borkowski, Franciszek231765 19.91
466 Verduga, Denis Homero231669
467 Franzen, Jozef231563 31.40
468 Kollberg, Lothar231467
469 Govedarica, Radovan231459 29.38
470 Seidler, Aldo231460
471 Hoen, Ragnar231374 36.73
472 Gereben, Ernö231272 70.03
473 Medina García, Antonio A231171 57.74
474 Taruffi, Daniele231075 18.82
475 Fedorowicz, John P230865 18.76
476 Olafsson, Helgi230561 20.87
477 Day, Lawrence A230566 28.41
478 Fraguela Gil, Jose Miguel230558
479 Tisdall, Jonathan D230575 18.84
480 Nowak, Ignacy230566 28.47
481 Helmertz, Per Inge230476
482 Braun, Gottfried230365 43.99
483 Schmidt, Bodo230273 27.19
484 Paehtz, Thomas Sr230268 20.82
485 Menvielle Lacourrelle, Augusto230165 38.88
486 McDonald Ross, Michael230169
487 Petran, Peter230057 22.84
488 Dietze, Wolfgang230061 27.03
489 Cibulka, Vladimir229965 35.66
490 Novak, Ivan229858 34.43
491 Rumens, David E229761 37.77
492 Diaz, Joaquin C229457 28.98
493 Andres Mendez, Miguel229476
494 Povah, Nigel E229462 24.95
495 Niklasson, Christer229469 24.49
496 Vulevic, Vjekoslav229367 28.24
497 Lipski, Tadeusz229263 33.73
498 Marszalek, Rafal229263 36.58
499 Arutiunov, Albert229272
500 Meyer, E.229176

These ratings, calculated as of June 30, 1977, incorporate all games (against rated opponents) played in the time between July 1, 1976 and June 30, 1977, along with the ratings that were already calculated as of June 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 June 30, 1977. This represents the player's estimated strength on July 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 July 1, 1977. The +/- value represents the standard deviation of that estimate; the player's true strength on July 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 July 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 June 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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