< December 31, 1977     Back to date list    April 30, 1978 >

Top 10 active players as of February 28, 1978


Top 500 active players as of February 28, 1978

  #  

Player Rating +/- Best? 75%? Age
1 Karpov, Anatoly E27964955.3% #226.76
2 Korchnoi, Viktor L27614921.8% #546.93
3 Tal, Mikhail2709483.6% #1641.30
4 Spassky, Boris V2704503.3% #1841.08
5 Petrosian, Tigran V2696502.2% #2148.70
6 Polugaevsky, Lev A2695502.3% #2143.27
7 Larsen, Bent2686491.4% #2542.98
8 Portisch, Lajos2676500.9% #3040.89
9 Ljubojevic, Ljubomir2667510.7% #3627.32
10 Tseshkovsky, Vitaly V2667500.6% #3533.43
11 Geller, Efim P2665510.6% #3652.98
12 Hort, Vlastimil2661480.3% #3834.13
13 Mecking, Henrique2654560.7% #4626.10
14 Dorfman, Iosif D2653540.4% #4525.82
15 Romanishin, Oleg M2651490.3% #4426.13
16 Savon, Vladimir A2650520.3% #4737.42
17 Gulko, Boris F2649500.2% #4631.05
18 Vaganian, Rafael A2642510.2% #5226.37
19 Vasiukov, Evgeny A2640570.4% #5644.97
20 Balashov, Yury S2640490.1% #5228.95
21 Smyslov, Vassily V2638500.1% #5556.92
22 Kuzmin, Gennady P2634490.1% #5632.11
23 Kholmov, Ratmir D2632550.2% #6152.79
24 Hübner, Robert2630520.2% #6029.31
25 Chekhov, Valery A2629620.4% #6722.25
26 Browne, Walter S2628510.1% #6229.13
27 Timman, Jan H262648 #6226.21
28 Gufeld, Eduard E2624590.3% #7041.94
29 Bagirov, Vladimir K2622540.1% #6841.53
30 Miles, Anthony J262248 #6622.84
31 Tukmakov, Vladimir B2622510.1% #6831.95
32 Ribli, Zoltán261951 #6926.48
33 Dzindzichashvili, Roman Y2619570.1% #7333.81
34 Krogius, Nikolay V2617630.3% #7847.60
35 Evans, Larry M2614740.7% #8745.93
36 Gligoric, Svetozar261349 #7455.07
37 Beliavsky, Alexander G260952 #7824.20
38 Kurajica, Bojan260852 #7930.29
39 Gipslis, Aivars2607520.1% #8141.05
40 Sveshnikov, Evgeny E260652 #8128.05
41 Parma, Bruno260554 #8236.16
42 Razuvaev, Yury S260555 #8532.38
43 Furman, Semen A2604580.1% #8757.24
44 Dvoretsky, Mark I2603630.1% #9030.22
45 Lerner, Konstantin Z260156 #8827.99
46 Kochiev, Alexander259953 #8721.92
47 Bronstein, David I259752 #8954.03
48 Smejkal, Jan259749 #8731.93
49 Panno, Oscar R259551 #9042.94
50 Marangunic, Srdjan2593740.3% #10734.33
51 Liberzon, Vladimir M259251 #9340.93
52 Gheorghiu, Florin259152 #9433.89
53 Sanguinetti, Raúl C259058 #9945.07
54 Byrne, Robert E259051 #9549.85
55 Palatnik, Semen A2589600.1% #10127.92
56 Andersson, Ulf258948 #9426.67
57 Unzicker, Wolfgang258857 #10052.67
58 Sosonko, Gennadi258649 #9834.78
59 Kavalek, Lubomir258450 #10034.55
60 Matanovic, Aleksandar258256 #10547.76
61 Kupreichik, Viktor D258258 #10728.65
62 Lein, Anatoly258260 #10846.91
63 Darga, Klaus V2581660.1% #11244.01
64 Sax, Gyula257949 #10426.69
65 Lombardy, William J257755 #11140.23
66 Klovans, Janis257759 #11342.88
67 Taimanov, Mark E257651 #10852.06
68 Uhlmann, Wolfgang257649 #10842.91
69 Zaitsev, Igor A257562 #11639.75
70 Averbakh, Yury L257263 #11956.05
71 Olafsson, Fridrik257250 #11143.09
72 Pfleger, Helmut257059 #11834.56
73 Suetin, Alexey S257056 #11751.28
74 Szabó, László257059 #11860.94
75 Alburt, Lev O256952 #11532.52
76 Timoshchenko, Gennady256960 #12128.83
77 Ivkov, Borislav256850 #11544.29
78 Ubilava, Elizbar E256569 #12927.50
79 Mikhalchishin, Adrian B256566 #12723.28
80 Commons, Kim S2561730.1% #13426.60
81 Georgadze, Tamaz V256056 #12630.30
82 Sakharov, A.256068 #134
83 Najdorf, Miguel255757 #12967.86
84 Nei, Iivo255761 #13146.33
85 Zakharov, Alexander V255660 #13234.39
86 Karasev, Vladimir I255568 #13739.70
87 Vokác, Marek255566 #13719.23
88 Ivanov, Igor V255368 #13931.14
89 Torre, Eugenio255350 #12826.32
90 Rashkovsky, Nukhim N255255 #13331.86
91 Tarjan, James E255152 #13126.02
92 Bukic, Enver255152 #13140.24
93 Grigorian, Karen A255154 #13330.47
94 Tringov, Georgy P255056 #13540.97
95 Knaak, Rainer F255050 #13224.94
96 Velimirovic, Dragoljub254952 #13335.79
97 Malich, Burkhard G254858 #13741.25
98 Matulovic, Milan254752 #13542.72
99 Panchenko, Alexander N254559 #14124.40
100 Nikolac, Juraj254556 #13945.84
101 Platonov, Igor V254463 44.11
102 Radulov, Ivan254253 39.14
103 Kapengut, Albert Z254175 33.65
104 Pachmann, Ludek254156 53.80
105 Rogoff, Kenneth S254058 24.93
106 Vitolinš, Alvis253964 31.70
107 Knezevic, Milorad253952 41.33
108 Grefe, John A253859 30.48
109 Stean, Michael F253552 24.48
110 Filip, Miroslav253558 49.34
111 Adorján, András253350 27.90
112 Csom, István253250 37.74
113 Zhuravliov, Valerij253167 39.21
114 Sigurjónsson, Gudmundur253050 30.43
115 Quinteros, Miguel A252749 30.17
116 Petrushin, Alexander I252768 30.96
117 Hulak, Krunoslav252653 26.76
118 Shamkovich, Leonid A252555 54.74
119 Ree, Hans252450 33.45
120 Schmidt, Wlodzimierz252353 34.88
121 Benko, Pal C252356 49.62
122 Lutikov, Anatoly S252255 45.06
123 Vogt, Lothar H252150 26.11
124 Antoshin, Vladimir S252172 48.79
125 Makarichev, Sergey Y251968 24.28
126 García Gonzáles, Guillermo251855 24.22
127 Faragó, Iván251750 31.90
128 Hecht, Hans-Joachim251761 39.08
129 Peresipkin, Vladimir251663
130 Kovacevic, Vladimir251659 35.92
131 Reshevsky, Samuel H251554 66.26
132 Díez del Corral, Jesús251568 44.89
133 Jansa, Vlastimil251551 35.25
134 Doroshkievich, Vladimir K251570 40.17
135 Suba, Mihai251555 30.74
136 Vukic, Milan251353 34.53
137 Kasparov, Garry K251269 14.87
138 Vukcevich, Milan R251264
139 Petrosian, Arshak B251158 24.20
140 Pribyl, Josef251153 30.38
141 Gurgenidze, Bukhuti I251065 44.29
142 Donner, Johannes H250953 50.64
143 Schneider, Lars Ake250956
144 Peters, John A250657 27.05
145 Keene, Raymond250552
146 Rodriguez, Ruben250576 31.22
147 Rajkovic, Dusan250254 35.70
148 Weinstein, Norman250260 27.40
149 Maric, Rudolf250274 50.79
150 Murey, Yakov250168 36.57
151 Christiansen, Larry M249958 21.67
152 Dueball, Juergen249974 32.91
153 Rodriguez, Amador249859 21.47
154 Kirov Ivanov, Nino249853 32.47
155 Calvo Minguez, Ricardo249762 34.35
156 Soltis, Andrew E249761 30.75
157 Bilek, István249760 45.55
158 Sanguinetti, Renato249662 61.84
159 Schweber, Samuel249563 41.62
160 Lengyel, Levente249456 44.71
161 Ciocaltea, Victor249257 46.12
162 Hermann, Manfred249262 35.49
163 Bleiman, Yaacov249264 30.47
164 Balinas, Rosendo Carrean249162
165 Zuckerman, Bernard249161 34.90
166 Podgaets, Mikhail Y249075 30.60
167 Espig, Lutz248952 29.15
168 Nemet, Ivan248868 34.87
169 Ghizdavu, Dumitru248763 28.77
170 Marjanovic, Slavoljub248761 23.14
171 Anikaev, Yury248774 29.66
172 Barczay, Laszlo248651 42.02
173 Prandstetter, Eduard248655 29.20
174 Gaprindashvili, Nona248658 36.82
175 Tatai, Stefano248551 39.93
176 Mariotti, Sergio248553 31.55
177 Radev, Nikolai248567 39.19
178 Piasetski, Leon David248464
179 Kaplan, Julio P248355 27.59
180 Karaklajic, Nikola248371 52.01
181 Mohrlok, Dieter248369
182 Hartston, William R248256 30.54
183 Simic, Radoslav248274 29.72
184 Pereszupkin, Alexander248272
185 Regan, Kenneth247967 18.46
186 Biyiasas, Peter247758 27.28
187 Stoica, Valentin247766 28.04
188 Ghitescu, Theodor247755 44.09
189 Ciric, Dragoljub M247668 42.29
190 Vadasz, Laszlo247551 30.09
191 Karner, Hillar247558 42.59
192 Gerusel, Mathias247458 40.06
193 Planinc, Albin247452 33.86
194 Marovic, Dražen247259 40.12
195 Kraidman, Yair247158 45.32
196 Nunn, John D M247055 22.84
197 Sofrevski, Jovan246961 42.53
198 Mnatsakanian, Eduard A246965 39.23
199 Kristiansen, Jens246863 25.76
200 Johannsson, Ingi Randver246873
201 Portisch, Ferenc246755 38.88
202 Damjanovic, Mato246656 50.93
203 Barle, Janez246555 25.93
204 Garcia Martinez, Silvino246560 33.65
205 Janoševic, Dragoljub246464 54.64
206 Antunac, Goran246473 32.86
207 Padevsky, Nikola B246360 44.75
208 Szekely, Peter246358 23.05
209 Lederman, Leon246260 30.76
210 Jakobsen, Ole246166 35.36
211 Rath, Ulrik246068 31.18
212 Vladimirov, Evgeny Y246068 21.11
213 Hug, Werner245954 25.47
214 Hernandez, Roman245853 28.26
215 Martz, William E245869
216 Ivanovic, Božidar245856 31.51
217 Spassov, Liuben245754 34.93
218 Jansson, Borje245673 35.95
219 Forintos, Gyözö V245557 42.58
220 Robatsch, Karl245557 49.37
221 Poutiainen, Pertti245459
222 Sahovic, Dragutin245456 37.55
223 Van Wijgerden, Cornelis245358 27.76
224 Kozlov, V.245373
225 Pintér, József245353 24.30
226 Rukavina, Josip245355 35.25
227 Brasket, Curt Justin245267
228 Martinovic, Slobodan245164 32.59
229 Hazai, Laszlo245053 24.71
230 Meduna, Eduard245056 27.46
231 Řgaard, Leif245057 26.15
232 Dueckstein, Andreas244975 50.57
233 Szmetan, Jorge244955 27.76
234 Dely, Peter244861 43.65
235 Ermenkov, Evgenij244854 28.41
236 Minic, Dragoljub244865 40.97
237 Mestel, A Jonathan244755 20.95
238 Haag, Ervin244766 45.13
239 Rohde, Michael A244764 18.51
240 Mednis, Edmar J244660 40.93
241 Cvetkovic, Srdjan244562 31.99
242 Diesen, Mark C244454
243 Bisguier, Arthur B244460 48.39
244 Matera, Salvatore Joseph244457
245 Castro Rojas, Oscar Humberto244253 24.80
246 Westerinen, Heikki MJ244251 33.83
247 Grinberg, Ricardo244164 30.12
248 Ungureanu, Emil244068 41.32
249 Bronstein, Luis244056 31.74
250 Kuijpers, Franciscus Antonius244062
251 Honfi, Karoly244055 47.34
252 Langeweg, Kick243954 40.97
253 Pomar Salamanca, Arturo243957 46.49
254 Ftácnik, Lubomír243952 20.33
255 Guimard, Carlos E243872 64.89
256 Hamann, Svend243768 37.39
257 Vaisman, Volodia243665 40.18
258 Gutman, Lev243665 32.42
259 Ignatiev, Felix N243672 46.14
260 Goodman, David SC243561
261 Barcza, Gedeon243564 66.52
262 Cobo Arteaga, Eldis243572
263 Popov, Luben243556 42.08
264 Sydor, Andrzej243463 41.15
265 Witkowski, Stefan243375 46.42
266 Lakic, Nikola243373 30.62
267 Bohosjan, Sarkis243373 36.91
268 Adamski, Jan243351 34.30
269 Krnic, Zdenko243372 30.40
270 Toth, Bela243363 34.85
271 Mestrovic, Zvonimir243367 33.36
272 Zaichik, Gennady L243265 21.05
273 Rubinetti, Jorge A243159 32.90
274 Ligterink, Gert243152 28.28
275 Eising, Johannes243169 42.75
276 Lukacs, Peter243054 27.64
277 Garcia, Raimundo243063 41.75
278 Sunye Neto, Jaime242967 20.82
279 Webb, Simon242952 28.72
280 Messing, Hrvoje242974 37.59
281 Brond, Victor242774
282 Partos, Charles242761 41.55
283 Yanofsky, Daniel A242675 52.92
284 Williams, Arthur Howard242667
285 Ornstein, Axel242652 25.84
286 Augustin, Josef242551 35.78
287 Emma, Jaime J242560 40.11
288 Raicevic, Vladimir242456 28.82
289 Bohm, Hans242452 28.12
290 McKay, Roderick M242374 26.05
291 Flesch, Janos242358 44.41
292 Haygarth, Michael J242275
293 Hase, Juan Carlos242261
294 Bellin, Robert242259 25.66
295 Rogulj, Branko242176 26.57
296 Kotov, Alexander A242173 64.54
297 Kagan, Shimon241953 35.89
298 Doda, Zbigniew241958 47.02
299 Bertok, Mario241875 48.49
300 Plachetka, Jan241851 33.03
301 Enklaar, Bertus F241764
302 Bednarski, Jacek B241556 38.95
303 Pytel, Krzysztof241560 32.79
304 Jelen, Iztok241464 31.11
305 Sikora Lerch, Jan241454
306 Bukal, Vladimir Sr241474 38.32
307 Rossetto, Héctor D241461 55.47
308 Pokojowczyk, Jerzy241456 29.02
309 Kovacs, Laszlo M241357 39.40
310 Denker, Arnold S241373 64.02
311 Ostojic, Predrag241354 40.02
312 Sznapik, Aleksander241256 27.05
313 Ostermeyer, Peter241269 34.38
314 Debarnot, Roberto241157 30.56
315 Soos, Bela241067 47.97
316 Rodriguez Vargas, Orestes241058 34.65
317 Botterill, George Steven241055
318 Trapl, Jindrich241064 35.92
319 Eslon, Jaan241066 25.98
320 Pritchett, Craig William241062
321 Kestler, Hans-Günter240858 38.21
322 Velikov, Petar240863 26.91
323 Peev, Peicho Chonev240757 37.90
324 Lechtynsky, Jiri240756 30.26
325 Akvist, Hakan240767 36.34
326 Eolian, Levon S240673 18.45
327 Liebert, Heinz240655 41.76
328 Penrose, Jonathan240571 44.39
329 Deze, Anton240562
330 Ilievski, Dimitar240575 36.51
331 Wockenfuss, Klaus240562 26.50
332 Pavlov, Mircea240575 40.46
333 Rocha, Antonio240462 33.71
334 Podzielny, Karl Heinz240172 23.47
335 Pohla, Harry240163 37.65
336 Nicevski, Risto240158 32.67
337 Spiridonov, Nikola240055 39.99
338 Hartoch, Robert G239956
339 Ervin, Roy C239866 27.15
340 Watson, John L239673 26.48
341 Jamieson, Robert Murray239672
342 Banas, Jan239354 30.73
343 Dake, Arthur William239369 67.88
344 Garcia Padron, Jose239256 19.93
345 Moehring, Guenther239254 41.26
346 Bönsch, Uwe239257 19.37
347 Wirthensohn, Heinz239157 26.82
348 Filipowicz, Andrzej239157 39.79
349 Georgiev, Krum239074 19.76
350 Cuasnicu, Oscar238866 35.34
351 Seirawan, Yasser238768 17.92
352 Andre, Wolfgang238673 24.94
353 Zwaig, Arne238561
354 Van Riemsdijk, Herman C238459 29.51
355 Rajna, George238359 31.04
356 Veinger, Itzhak238368 39.65
357 Segal, Alexandru Sorin238160 30.40
358 Speelman, Jonathan S238159 21.40
359 Alexandria, Nana238173 28.37
360 Visier Segovia, Fernando238157 35.07
361 Navarovszky, Laszlo238071 44.90
362 Harandi, Khosro237965 27.49
363 Fedorowicz, John P237956 19.42
364 Huss, Andreas237961 27.37
365 Hindle, Owen M237972 37.95
366 Kozma, Julius237766 48.74
367 Wade, Robert Graham237573
368 Silva, Fernando237565 27.57
369 Basman, Michael J237461 31.94
370 Lombard, Andre237456 27.44
371 Neckar, Lubomir237261 27.57
372 Tisdall, Jonathan D237262 19.51
373 Kostro, Jerzy237162 41.09
374 Kinnmark, Ove237172 33.18
375 Szilágyi, György237159 56.65
376 Szymczak, Zbigniew237062 26.15
377 Bjelajac, Milan237074 29.95
378 Cuartas, Carlos237064 37.54
379 Schussler, Harry236967 20.68
380 Schinzel, Wladyslaw236956 34.77
381 Macles, Jacques236973 32.64
382 Rigo, Janos236960 29.33
383 Gasic, Bozidar236864 40.38
384 Iskov, Gert236762 29.58
385 Hausner, Ivan236765 25.86
386 Tompa, Janos236555 30.83
387 Czerniak, Moshe236572 68.07
388 Rayner, Emmanuel236474 19.71
389 Formanek, Edward W236359 35.81
390 Mihaljcisin, Mihajlo236373 45.02
391 Povah, Nigel E236361 25.61
392 Cámpora, Daniel H236361 20.66
393 Horvath, Tamas236360 26.35
394 Hesse, Peter236259 33.41
395 Sibarevic, Milenko236273 32.95
396 Mortensen, Erling236263 22.89
397 Bellon Lopez, Juan Manuel235953 27.80
398 Kirpichnikov, Vladimir S235965
399 Lanc, Alois235976 30.03
400 Ek, Hans235975 49.39
401 Whiteley, Andrew J235860 30.72
402 Heuer, Valter235863 49.62
403 Zinn, Lothar235771 39.94
404 Franklin, Michael J235774 47.07
405 Van der Sterren, Paul235654 21.94
406 Maciejewski, Andrzej235666 26.64
407 Borkowski, Franciszek235467 20.58
408 Silva Sanchez, Carlos235370 33.69
409 Anelli, Antonio235367 33.80
410 Heinicke, Herbert T235269 72.95
411 Kopec, Danny235171 23.99
412 Trabattoni, Franco235174 21.79
413 Van der Vliet, Fredrik235160
414 Levy, David Neil Lawrence235073
415 Van Baarle, C John235069 32.85
416 Mascarinas, Rico234961 24.98
417 Brueggemann, Joachim234769 26.40
418 Orso, Miklos234764 21.72
419 Tan Lian Ann234767
420 Rantanen, Yrjo A234565 27.84
421 Estevez Morales, Guillermo234558
422 Knox, Victor W234467 33.10
423 Pétursson, Margeir234460 18.04
424 Fichtl, Jirí234266 57.03
425 Klaric, Zlatko234276 21.34
426 Ambroz, Jan234266 23.69
427 Grabczewski, Romuald234275 46.06
428 Todorcevic, Miodrag234075 37.30
429 Lehmann, Heinz Dr234063
430 Camara, Helder234063 41.06
431 Rostalski, Walter233969 25.14
432 Fuller, Maxwell L233966 33.08
433 Schaufelberger, Heinz233873 30.28
434 De Greif, Boris233875 48.04
435 Sapi, Laszlo233758 42.93
436 Clemens, Christian233767 37.56
437 Kluger, Guyla233769 64.12
438 Olafsson, Helgi233758 21.54
439 Taulbut, Shaun M233571 20.13
440 Niklasson, Christer233464 25.15
441 Lekander, Rolf233476 31.15
442 Lanka, Zigurds233366 17.77
443 Kristiansen, Erling233375 41.20
444 Garcia Palermo, Carlos233267 24.24
445 Cording, Harm233168 41.14
446 Wedberg, Tom233171 24.26
447 Nogueiras, Jesus233163 18.61
448 Gross, Stefan233165 28.50
449 Boudy, Julio233065 26.71
450 Fedder, Steen233068 26.71
451 Law, Andrew P233068 27.64
452 Baumbach, Friedrich232870 42.47
453 Ujtelky, Maximilián232874 62.85
454 Haik, Aldo232866 25.36
455 Trois, Francisco RT232758
456 Jancev, Lazo232671
457 Arnason, Jon L232566 17.29
458 Kaiszauri, Konstanty232568 25.34
459 Corden, Martyn J232464
460 Casas, Fernando232467 51.52
461 Boersma, Paulus A232371 29.62
462 Franco Ocampos, Zenon232272 21.79
463 Tichy, Vladimir232265 31.41
464 Schmidt, Bodo232273 27.85
465 Gruenberg, Hans Ulrich232169 22.14
466 Martin Gonzalez, Angel232057 25.15
467 Bielczyk, Jacek231960 25.01
468 Fernandez, Juan C231960 26.57
469 Lambert, Glenn EJ231958
470 Chiburdanidze, Maia G231963 17.11
471 Lebredo, Gerardo231856 27.57
472 Kuligowski, Adam231870 22.18
473 Mueller, Klaus Uwe231766
474 Birnboim, Nathan231666 27.25
475 Garcia, Wilfredo231676 23.26
476 Bueno Perez, Lazaro231664
477 Govedarica, Radovan231661 30.04
478 Petran, Pal231557 31.45
479 Flear, Glenn C231473 19.04
480 Fraguela Gil, Jose Miguel231460
481 Ochoa de Echaguen, F Javier231374 23.48
482 Baljon, Christofoor231363 24.68
483 Starck, Bodo231268 43.37
484 Rumens, David E231163 38.43
485 Dietze, Wolfgang231069 27.69
486 Thomas, Richard231075
487 Franzen, Jozef231069 32.06
488 Rosenlund, Thorbjorn231065 26.69
489 Kollberg, Lothar230376
490 Verduga, Denis Homero230267
491 Menvielle Lacourrelle, Augusto230268 39.54
492 Day, Lawrence A230268 29.07
493 Wagman, Stuart229970 58.79
494 Alster, Ladislav229966 50.90
495 Drvota, Antonin229966
496 Seidler, Aldo229961
497 Medina García, Antonio A229864 58.40
498 Cafferty, Bernard229760 43.67
499 Sanz Alonso, Francisco Javier229770
500 Perenyi, Bela229763

These ratings, calculated as of February 28, 1978, incorporate all games (against rated opponents) played in the time between March 1, 1977 and February 28, 1978, along with the ratings that were already calculated as of February 28, 1977. 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 February 28, 1978. This represents the player's estimated strength on March 1, 1978.

+/- 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 March 1, 1978. The +/- value represents the standard deviation of that estimate; the player's true strength on March 1, 1978 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 March 1, 1978. 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 February 28, 1978. 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