< August 31, 1977     Back to date list    December 31, 1977 >

Top 10 active players as of October 31, 1977

  #  

Player Rating +/-
1 Karpov, Anatoly E279949
2 Korchnoi, Viktor L274050
3 Polugaevsky, Lev A271350
4 Tal, Mikhail270948
5 Petrosian, Tigran V270250
6 Spassky, Boris V269651
7 Mecking, Henrique268556
8 Portisch, Lajos268350
9 Romanishin, Oleg M268049
10 Larsen, Bent267850

About these ratings

Top 500 active players as of October 31, 1977

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E27994960.4% #226.44
2 Korchnoi, Viktor L27405012.0% #946.61
3 Polugaevsky, Lev A2713505.0% #1542.94
4 Tal, Mikhail2709483.7% #1640.97
5 Petrosian, Tigran V2702503.0% #1948.37
6 Spassky, Boris V2696512.6% #2140.75
7 Mecking, Henrique2685562.2% #2825.77
8 Portisch, Lajos2683501.4% #2740.57
9 Romanishin, Oleg M2680491.1% #2825.81
10 Larsen, Bent2678501.1% #2942.66
11 Geller, Efim P2674500.8% #3252.66
12 Ljubojevic, Ljubomir2671510.9% #3326.99
13 Hort, Vlastimil2662480.4% #3733.80
14 Balashov, Yury S2657490.3% #4128.63
15 Tseshkovsky, Vitaly V2650490.2% #4633.10
16 Smyslov, Vassily V2648500.2% #4756.60
17 Gufeld, Eduard E2644610.7% #5541.62
18 Vasiukov, Evgeny A2639550.3% #5544.65
19 Kholmov, Ratmir D2638540.2% #5652.47
20 Savon, Vladimir A2636510.1% #5637.10
21 Vaganian, Rafael A2634500.1% #5726.04
22 Gulko, Boris F2633500.1% #5730.73
23 Kuzmin, Gennady P2633510.1% #5931.78
24 Hübner, Robert2630520.1% #6128.98
25 Ribli, Zoltán2629500.1% #6126.15
26 Gipslis, Aivars2623530.1% #6840.73
27 Gligoric, Svetozar2623500.1% #6654.74
28 Sveshnikov, Evgeny E2622540.1% #6927.72
29 Tukmakov, Vladimir B262251 #6731.63
30 Krogius, Nikolay V2620620.3% #7547.27
31 Dorfman, Iosif D2619550.1% #7225.50
32 Evans, Larry M2617680.5% #8145.61
33 Browne, Walter S261351 #7428.81
34 Marangunic, Srdjan2611650.3% #8433.99
35 Timman, Jan H261148 #7525.87
36 Dvoretsky, Mark I2610580.1% #8129.89
37 Miles, Anthony J260948 #7722.52
38 Razuvaev, Yury S260853 #8132.06
39 Bronstein, David I260651 #8153.70
40 Liberzon, Vladimir M260652 #8140.61
41 Uhlmann, Wolfgang260549 #8042.59
42 Byrne, Robert E260451 #8349.53
43 Chekhov, Valery A2603580.1% #8821.92
44 Furman, Semen A2603560.1% #8756.91
45 Smejkal, Jan260349 #8331.61
46 Parma, Bruno260253 #8535.83
47 Dzindzichashvili, Roman Y2602600.1% #9033.49
48 Kochiev, Alexander259953 #8821.60
49 Panchenko, Alexander N2599600.1% #9224.07
50 Sanguinetti, Raúl C259755 #9244.74
51 Andersson, Ulf259748 #8826.34
52 Beliavsky, Alexander G259551 #9223.87
53 Panno, Oscar R259550 #9142.62
54 Sosonko, Gennadi259349 #9234.45
55 Bagirov, Vladimir K259156 #9841.21
56 Kurajica, Bojan259151 #9529.95
57 Unzicker, Wolfgang259056 #9852.35
58 Kavalek, Lubomir259049 #9434.23
59 Gheorghiu, Florin258951 #9633.57
60 Alburt, Lev O258754 #10032.19
61 Darga, Klaus V2586660.1% #10943.69
62 Averbakh, Yury L2582640.1% #11155.73
63 Taimanov, Mark E257950 #10551.73
64 Szabó, László257857 #10960.62
65 Lein, Anatoly257858 #11146.59
66 Nikolac, Juraj257855 #11045.52
67 Velimirovic, Dragoljub257752 #10835.47
68 Suetin, Alexey S257655 #11050.95
69 Sax, Gyula257649 #10826.37
70 Kupreichik, Viktor D257554 #11128.33
71 Zaitsev, Igor A257360 #11739.43
72 Bukic, Enver257354 #11239.91
73 Matanovic, Aleksandar257056 #11747.44
74 Zakharov, Alexander V256757 #12134.06
75 Pfleger, Helmut256657 #12134.23
76 Palatnik, Semen A256561 #12427.60
77 Olafsson, Fridrik256450 #11842.76
78 Matulovic, Milan256351 #12042.39
79 Klovans, Janis256362 #12742.56
80 Timoshchenko, Gennady256357 #12328.51
81 Lombardy, William J256154 #12339.90
82 Lerner, Konstantin Z256167 #13227.67
83 Georgadze, Tamaz V256155 #12529.97
84 Torre, Eugenio256049 #12225.98
85 Nei, Iivo256060 #12845.99
86 Schmid, Lothar M2559740.1% #13849.47
87 Commons, Kim S255864 #13226.27
88 Grigorian, Karen A255853 #12630.15
89 Lutikov, Anatoly S255759 #13144.74
90 Najdorf, Miguel255757 #13067.54
91 Sakharov, A.255666 #137
92 Kapengut, Albert Z2556730.1% #14033.32
93 Platonov, Igor V255474 #14243.79
94 Rashkovsky, Nukhim N255353 #13031.54
95 Pachmann, Ludek255255 #13353.47
96 Ivkov, Borislav255051 #13143.96
97 Sigurjónsson, Gudmundur254550 #13630.10
98 Tarjan, James E254552 #13725.69
99 Karasev, Vladimir I254465 #14639.37
100 Adorján, András254350 #13827.58
101 Hulak, Krunoslav254252 26.43
102 Malich, Burkhard G254157 40.92
103 Radulov, Ivan254153 38.81
104 Rogoff, Kenneth S254058 24.61
105 Schmidt, Wlodzimierz254051 34.56
106 Filip, Miroslav254058 49.01
107 Grefe, John A253957 30.15
108 Tringov, Georgy P253856 40.65
109 Csom, István253850 37.41
110 Ubilava, Elizbar E253768 27.18
111 Knezevic, Milorad253753 40.99
112 Kovacevic, Vladimir253661 35.60
113 Petrushin, Alexander I253361 30.64
114 Petrosian, Arshak B253258 23.87
115 Hecht, Hans-Joachim253058 38.76
116 Jansa, Vlastimil253050 34.92
117 Lukin, Andrei M252773 29.17
118 Reshevsky, Samuel H252654 65.92
119 Stean, Michael F252551 24.16
120 Vogt, Lothar H252549 25.79
121 Vukcevich, Milan R252459
122 Makarichev, Sergey Y252264 23.95
123 Schneider, Lars Ake251860
124 Benko, Pal C251854 49.29
125 Pribyl, Josef251852 30.05
126 Suttles, Duncan251768 31.85
127 Donner, Johannes H251652 50.32
128 Averkin, Orest N251668 33.68
129 Doroshkievich, Vladimir K251464 39.84
130 Weinstein, Norman251457 27.07
131 Knaak, Rainer F251451 24.62
132 Zhuravliov, Valerij251365 38.88
133 Vukic, Milan251353 34.20
134 Quinteros, Miguel A251250 29.84
135 Ree, Hans251250 33.13
136 Katalymov, Boris N251070
137 Ivanov, Igor V250964 30.81
138 Maric, Rudolf250970 50.47
139 Antoshin, Vladimir S250967 48.46
140 Balinas, Rosendo Carrean250962
141 Hermann, Manfred250962 35.17
142 Bilek, István250857 45.22
143 Faragó, Iván250850 31.58
144 Suba, Mihai250854 30.41
145 Kirov Ivanov, Nino250852 32.14
146 Keene, Raymond250651
147 Gurgenidze, Bukhuti I250562 43.96
148 Díez del Corral, Jesús250471 44.57
149 Regan, Kenneth250463 18.13
150 Tatai, Stefano250351 39.61
151 Karaklajic, Nikola250262 51.69
152 Dueball, Juergen250167 32.59
153 Ghizdavu, Dumitru249862 28.44
154 Rajkovic, Dusan249756 35.37
155 Barczay, Laszlo249650 41.69
156 Schweber, Samuel249557 41.29
157 García Gonzáles, Guillermo249554 23.89
158 Soltis, Andrew E249558 30.42
159 Rodriguez, Amador249456 21.15
160 Peters, John A249357 26.72
161 Shamkovich, Leonid A249356 54.41
162 Calvo Minguez, Ricardo249261 34.02
163 Ghitescu, Theodor249255 43.77
164 Simic, Radoslav249166 29.39
165 Sanguinetti, Renato249160 61.52
166 Ciocaltea, Victor249055 45.79
167 Gaprindashvili, Nona249061 36.49
168 Vadasz, Laszlo248951 29.76
169 Nemet, Ivan248962 34.55
170 Kaplan, Julio P248853 27.27
171 Rodriguez, Ruben248772 30.89
172 Bleiman, Yaacov248675 30.15
173 Pereszupkin, Alexander248564
174 Hartston, William R248554 30.22
175 Christiansen, Larry M248455 21.34
176 Rath, Ulrik248466 30.84
177 Radev, Nikolai248461 38.86
178 Nunn, John D M248456 22.52
179 Mariotti, Sergio248153 31.22
180 Portisch, Ferenc248156 38.56
181 Damjanovic, Mato248154 50.61
182 Kraidman, Yair248059 44.99
183 Johannsson, Ingi Randver247871
184 Zuckerman, Bernard247858 34.58
185 Karner, Hillar247857 42.26
186 Szekely, Peter247759 22.73
187 Forintos, Gyözö V247655 42.25
188 Marovic, Dražen247555 39.80
189 Eolian, Levon S247573 18.12
190 Hazai, Laszlo247454 24.38
191 Podgaets, Mikhail Y247367 30.27
192 Brasket, Curt Justin247267
193 Ciric, Dragoljub M247266 41.96
194 Botterill, George Steven247257
195 Planinc, Albin247151 33.54
196 Hamann, Svend247172 37.06
197 Padevsky, Nikola B247157 44.42
198 Mohrlok, Dieter247167
199 Stoica, Valentin247067 27.71
200 Espig, Lutz247052 28.82
201 Antunac, Goran246964 32.54
202 Spassov, Liuben246853 34.61
203 Dely, Peter246759 43.32
204 Anikaev, Yury246766 29.34
205 Zilberstein, Valery I246775 34.55
206 Mestrovic, Zvonimir246763 33.04
207 Lakic, Nikola246564 30.29
208 Pintér, József246452 23.97
209 Biyiasas, Peter246456 26.94
210 Gerusel, Mathias246356 39.74
211 Cosulich, Roberto246371
212 Hernandez, Roman246353 27.93
213 Sofrevski, Jovan246370 42.20
214 Kozlov, V.246164
215 Jansson, Borje246169 35.63
216 Vladimirov, Evgeny Y246063 20.78
217 Hug, Werner245953 25.14
218 Janoševic, Dragoljub245959 54.31
219 Lputian, Smbat G245973 19.71
220 Van Wijgerden, Cornelis245856 27.44
221 Westerinen, Heikki MJ245852 33.51
222 Martz, William E245864
223 Cvetkovic, Srdjan245867 31.67
224 Szmetan, Jorge245554 27.43
225 Lengyel, Levente245461 44.38
226 Jakobsen, Ole245376 35.03
227 Castro Rojas, Oscar Humberto245352 24.48
228 Honfi, Karoly245254 47.02
229 Řgaard, Leif245160 25.82
230 Dueckstein, Andreas245167 50.24
231 Barle, Janez245154 25.61
232 Mnatsakanian, Eduard A245062 38.89
233 Raicevic, Vladimir245056 28.49
234 Robatsch, Karl245057 49.05
235 Bohosjan, Sarkis245064 36.59
236 Garcia Martinez, Silvino245058 33.32
237 Sahovic, Dragutin244958 37.23
238 Prandstetter, Eduard244957 28.87
239 Rukavina, Josip244854 34.92
240 Ermenkov, Evgenij244856 28.09
241 Meduna, Eduard244858 27.14
242 Bisguier, Arthur B244856 48.06
243 Estrin, Yacov B244775 54.53
244 Kuijpers, Franciscus Antonius244765
245 Popov, Luben244755 41.76
246 Martinovic, Slobodan244458 32.27
247 Toth, Bela244464 34.53
248 Mednis, Edmar J244456 40.61
249 Rodriguez Vargas, Orestes244460 34.32
250 Minic, Dragoljub244359 40.65
251 Ignatiev, Felix N244372 45.81
252 Haag, Ervin244366 44.80
253 Krnic, Zdenko244272 30.08
254 Diesen, Mark C244254
255 Langeweg, Kick244254 40.65
256 Ungureanu, Emil244267 40.99
257 Sydor, Andrzej244158 40.83
258 Kagan, Shimon244154 35.57
259 McKay, Roderick M244175 25.72
260 Augustin, Josef244052 35.45
261 Pomar Salamanca, Arturo244055 46.16
262 Matera, Salvatore Joseph244057
263 Poutiainen, Pertti244057
264 Bohm, Hans243951 27.79
265 Gutman, Lev243959 32.10
266 Partos, Charles243961 41.22
267 Lederman, Leon243863 30.43
268 Petkevich, Jusefs243869 36.86
269 Hase, Juan Carlos243868
270 Barcza, Gedeon243762 66.19
271 Khalikian, Ovik243773
272 Efimov, Igor243773 17.12
273 Witkowski, Stefan243766 46.09
274 Ligterink, Gert243652 27.95
275 Webb, Simon243653 28.39
276 Rohde, Michael A243360 18.18
277 Guimard, Carlos E243364 64.57
278 Ivanovic, Božidar243256 31.19
279 Flesch, Janos243258 44.09
280 Ostojic, Predrag243153 39.69
281 Bednarski, Jacek B243055 38.63
282 Malevinsky, Alexander A243070 27.68
283 Minev, Nikolay N243074 46.81
284 Grinberg, Ricardo243068 29.80
285 Buljovcic, Ivan242973 40.84
286 Doda, Zbigniew242955 46.69
287 Popov, Nikolay242967
288 Yanofsky, Daniel A242867 52.60
289 Ornstein, Axel242851 25.52
290 Rogulj, Branko242767 26.25
291 Adamski, Jan242752 33.96
292 Brond, Victor242766
293 Cobo Arteaga, Eldis242771
294 Eising, Johannes242664 42.42
295 Messing, Hrvoje242666 37.26
296 Rubinetti, Jorge A242655 32.58
297 Kotov, Alexander A242472 64.22
298 Pytel, Krzysztof242256 32.46
299 Garcia, Raimundo242257 41.43
300 Kovacs, Laszlo M242261 39.07
301 Bellin, Robert242156 25.34
302 Williams, Arthur Howard242166
303 Liebert, Heinz242053 41.44
304 Soos, Bela242068 47.65
305 Bukal, Vladimir Sr241965 37.99
306 Mestel, A Jonathan241957 20.63
307 Rossetto, Héctor D241856 55.15
308 Pritchett, Craig William241860
309 Lukacs, Peter241755 27.31
310 Pokojowczyk, Jerzy241656 28.69
311 Haygarth, Michael J241574
312 Sznapik, Aleksander241555 26.72
313 Jamieson, Robert Murray241464
314 Ostermeyer, Peter241464 34.05
315 Vaisman, Volodia241360 39.84
316 Rajna, George241360 30.71
317 Jelen, Iztok241364 30.78
318 Bertok, Mario241366 48.16
319 Hartoch, Robert G241355
320 Basman, Michael J241262 31.62
321 Deze, Anton241261
322 Peev, Peicho Chonev241260 37.58
323 van Scheltinga, Tjeerd D241271 63.65
324 Plachetka, Jan241253 32.70
325 Enklaar, Bertus F241159
326 Lechtynsky, Jiri241156 29.93
327 Marjanovic, Slavoljub241063 22.82
328 Penrose, Jonathan241071 44.06
329 Podzielny, Karl Heinz241074 23.14
330 Ftácnik, Lubomír240956 20.00
331 Spiridonov, Nikola240953 39.67
332 Wockenfuss, Klaus240861 26.17
333 Sunye Neto, Jaime240667 20.49
334 Zwaig, Arne240558
335 Denker, Arnold S240569 63.69
336 Ilievski, Dimitar240566 36.19
337 Kestler, Hans-Günter240457 37.88
338 Goodman, David SC240361
339 Gliksman, Darko240369 40.07
340 Debarnot, Roberto240257 30.24
341 Hindle, Owen M240273 37.63
342 Filipowicz, Andrzej240257 39.47
343 Balduzzi, Reynaldo240169
344 Garcia, R.240169
345 Akvist, Hakan240165 36.01
346 Eslon, Jaan240167 25.66
347 Moehring, Guenther240054 40.93
348 Trapl, Jindrich239962 35.60
349 Pavlov, Mircea239973 40.13
350 Pohla, Harry239962 37.33
351 Lehmann, Heinz Dr239871
352 Zichichi, Alvise239868 39.32
353 Kristiansen, Jens239774 25.43
354 Bronstein, Luis239658 31.41
355 Dake, Arthur William239667 67.56
356 Cuartas, Carlos239564 37.21
357 Garcia Padron, Jose239557 19.61
358 Ghinda, Mihail Viorel239475 28.27
359 Nicevski, Risto239359 32.34
360 Bönsch, Uwe239255 19.04
361 Sapi, Laszlo239061 42.61
362 De la Vega, Hector239070 51.62
363 Schinzel, Wladyslaw238954 34.44
364 Visier Segovia, Fernando238857 34.74
365 Gesos, Pavlos238873 32.43
366 Wirthensohn, Heinz238756 26.49
367 Rocha, Antonio238761 33.38
368 Kinnmark, Ove238569 32.85
369 Cuasnicu, Oscar238559 35.02
370 Van Riemsdijk, Herman C238561 29.18
371 Silva, Fernando238463 27.24
372 Andre, Wolfgang238475 24.62
373 Harandi, Khosro238464 27.16
374 Wade, Robert Graham238471
375 Onat, Ilhan238272 47.90
376 Seirawan, Yasser238167 17.60
377 Zaichik, Gennady L238176 20.72
378 Alexandria, Nana238068 28.05
379 Rantanen, Yrjo A237970 27.52
380 Formanek, Edward W237866 35.48
381 Kozma, Julius237863 48.41
382 Rosenlund, Thorbjorn237675 26.37
383 Horvath, Tamas237657 26.02
384 Czerniak, Moshe237569 67.74
385 Heuer, Valter237462 49.30
386 Neckar, Lubomir237464 27.24
387 Banas, Jan237455 30.41
388 Gasic, Bozidar237365 40.05
389 Bjelajac, Milan237265 29.63
390 Rayner, Emmanuel237274 19.39
391 Lombard, Andre237255 27.12
392 Navarovszky, Laszlo237070 44.58
393 Garcia, Wilfredo237073 22.93
394 Iskov, Gert237067 29.26
395 Speelman, Jonathan S236868 21.08
396 Mihaljcisin, Mihajlo236864 44.69
397 Tompa, Janos236856 30.50
398 Bellon Lopez, Juan Manuel236753 27.48
399 Ervin, Roy C236666 26.82
400 Casas, Fernando236673 51.19
401 Macles, Jacques236666 32.31
402 Ek, Hans236570 49.07
403 Levy, David Neil Lawrence236468
404 De Bruycker, Bernard236475 36.38
405 Emma, Jaime J236464 39.79
406 Kostro, Jerzy236361 40.77
407 Zinn, Lothar236363 39.62
408 Sikora Lerch, Jan236357
409 Sibarevic, Milenko236364 32.63
410 Knox, Victor W236267 32.77
411 Haik, Aldo236265 25.03
412 Szymczak, Zbigniew236258 25.82
413 Akopian, Gagik236173 36.29
414 Huss, Andreas236061 27.04
415 Lanc, Alois236067 29.70
416 Corden, Martyn J235965
417 Whiteley, Andrew J235959 30.39
418 Tan Lian Ann235666
419 Grabczewski, Romuald235672 45.73
420 Trabattoni, Franco235675 21.47
421 Fichtl, Jirí235561 56.71
422 Segal, Alexandru Sorin235464 30.07
423 Donchenko, Anatoly G235368 37.16
424 De Greif, Boris235371 47.72
425 Kristiansen, Erling235073 40.87
426 Heinicke, Herbert T235069 72.63
427 Dieks, Roy G234973 21.75
428 Maciejewski, Andrzej234862 26.31
429 Gofshtein, Leonid D234876 24.53
430 Taulbut, Shaun M234771 19.80
431 Boersma, Paulus A234463 29.29
432 Estevez Morales, Guillermo234456
433 Szilágyi, György234359 56.32
434 Fedorowicz, John P234358 19.09
435 Van Baarle, C John234363 32.53
436 Mascarinas, Rico234262 24.66
437 Cording, Harm234267 40.81
438 Boudy, Julio234165 26.39
439 Kaiszauri, Konstanty234166 25.02
440 Klaric, Zlatko234176 21.02
441 Eperjesi, Laszlo234062 34.46
442 Kushnir, Alla234071
443 Fuller, Maxwell L233963 32.76
444 Brkljaca, Ante233868 23.97
445 Kluger, Guyla233862 63.79
446 Rigo, Janos233663 29.01
447 Trois, Francisco RT233659
448 Rostalski, Walter233669 24.81
449 Pesantes Carbajal, Carlos233572
450 Law, Andrew P233369 27.31
451 Schussler, Harry233275 20.35
452 Petran, Pal233255 31.13
453 Garcia Palermo, Carlos233162 23.91
454 Manasterski, Lutoslaw233171 40.72
455 Clemens, Christian233165 37.24
456 Baumbach, Friedrich233062 42.15
457 Jancev, Lazo233071
458 Brondum, Eric232871 35.87
459 Bernard, Ryszard232870 33.19
460 Cardoso, Radolfo Tan232767
461 Franco Ocampos, Zenon232565 21.47
462 Fedder, Steen232575 26.38
463 Hoen, Ragnar232575 37.07
464 Lambert, Glenn EJ232558
465 Borkowski, Franciszek232565 20.25
466 Kuligowski, Adam232468 21.85
467 Schaufelberger, Heinz232269 29.94
468 Taruffi, Daniele232275 19.16
469 Van der Vliet, Fredrik232160
470 Hesse, Peter232175 33.09
471 Povah, Nigel E232165 25.29
472 Verduga, Denis Homero232169
473 Camara, Helder232063 40.73
474 Spacek, Petr231774 23.68
475 Franzen, Jozef231563 31.73
476 Thomas, Richard231575
477 Gereben, Ernö231573 70.37
478 Cleghorn, Peter231574
479 Rumens, David E231459 38.11
480 Gruenberg, Hans Ulrich231462 21.81
481 Seidler, Aldo231460
482 Kollberg, Lothar231267
483 Van der Sterren, Paul231259 21.62
484 Medina García, Antonio A231273 58.08
485 Fraguela Gil, Jose Miguel231160
486 Govedarica, Radovan231159 29.71
487 Martin Gonzalez, Angel231158 24.83
488 Lebredo, Gerardo230855 27.24
489 Jankovec, Ivan230861 39.04
490 Tisdall, Jonathan D230675 19.18
491 Braun, Gottfried230665 44.34
492 Day, Lawrence A230567 28.75
493 Menvielle Lacourrelle, Augusto230365 39.22
494 Schmidt, Bodo230273 27.53
495 Cibulka, Vladimir230165 35.99
496 Alster, Ladislav230066 50.58
497 Drvota, Antonin230066
498 Cafferty, Bernard230060 43.34
499 Dietze, Wolfgang229961 27.37
500 Novak, Ivan229858 34.76

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

Back to top

Home