< December 31, 1965     Back to date list    June 30, 1966 >

Top 10 active players as of March 31, 1966

  #  

Player Rating +/-
1 Fischer, Robert J276955
2 Petrosian, Tigran V274452
3 Botvinnik, Mikhail M272656
4 Spassky, Boris V271551
5 Korchnoi, Viktor L271049
6 Stein, Leonid Z270350
7 Geller, Efim P269450
8 Tal, Mikhail268450
9 Keres, Paul267652
10 Najdorf, Miguel267458

About these ratings

All active players as of March 31, 1966

  #  

Player Rating +/- Best? 75%? Age
1 Fischer, Robert J27695537.3% #423.06
2 Petrosian, Tigran V27445218.4% #736.78
3 Botvinnik, Mikhail M27265612.4% #1054.62
4 Spassky, Boris V2715517.3% #1129.17
5 Korchnoi, Viktor L2710495.5% #1235.02
6 Stein, Leonid Z2703504.3% #1331.38
7 Geller, Efim P2694503.0% #1541.08
8 Tal, Mikhail2684502.0% #1729.39
9 Keres, Paul2676521.7% #2050.23
10 Najdorf, Miguel2674582.4% #2155.95
11 Smyslov, Vassily V2673501.2% #2045.02
12 Boleslavsky, Isaak E2662601.8% #2646.80
13 Polugaevsky, Lev A2660500.6% #2531.36
14 Portisch, Lajos2651490.4% #2828.98
15 Taimanov, Mark E2637500.2% #3340.15
16 Gligoric, Svetozar2627490.1% #3743.16
17 Ivkov, Borislav2627480.1% #3732.38
18 Larsen, Bent2627510.1% #3831.07
19 Bronstein, David I2624510.1% #3942.12
20 Olafsson, Fridrik2615620.3% #4831.18
21 Unzicker, Wolfgang2612540.1% #4740.76
22 Kholmov, Ratmir D2611510.1% #4640.88
23 Uhlmann, Wolfgang260949 #4631.01
24 Furman, Semen A2606570.1% #5145.33
25 Reshevsky, Samuel H2606540.1% #5054.35
26 Benko, Pal C260553 #5037.71
27 Lutikov, Anatoly S2605580.1% #5333.15
28 Suetin, Alexey S259252 #5739.37
29 Vasiukov, Evgeny A259152 #5833.07
30 Antoshin, Vladimir S259051 #5836.87
31 Krogius, Nikolay V258852 #6035.69
32 Gipslis, Aivars258753 #6129.15
33 Averbakh, Yury L258652 #6244.15
34 Evans, Larry M258257 #6734.02
35 Pachmann, Ludek257849 #6541.88
36 Zaitsev, Alexander N2578690.1% #7530.79
37 Lein, Anatoly257653 #6835.01
38 Byrne, Robert E257159 #7637.94
39 Panno, Oscar R257055 #7431.04
40 Matulovic, Milan257049 #7130.80
41 Hort, Vlastimil256852 #7422.22
42 Shamkovich, Leonid A256754 #7642.83
43 Parma, Bruno256650 #7524.25
44 Sanguinetti, Raúl C256555 #7833.16
45 Bolbochán, Julio256554 #7746.03
46 Addison, William G256460 #8132.34
47 Szabó, László256350 #7749.03
48 Matanovic, Aleksandar256349 #7635.85
49 Donner, Johannes H255950 #8038.73
50 Bilek, István255749 #8033.64
51 Kotov, Alexander A255263 #9252.63
52 Darga, Klaus V255256 #8932.10
53 Pomar Salamanca, Arturo255252 #8734.58
54 Bagirov, Vladimir K254965 #9629.62
55 Schmid, Lothar M254656 #9237.88
56 Gufeld, Eduard E254355 #9430.03
57 Platonov, Igor V254170 #10632.20
58 Ilivitsky, Georgy A254065 #10344.91
59 Liberzon, Vladimir M254053 #9629.02
60 Rossolimo, Nicolas253963 #10356.09
61 Bannik, Anatoly A253971 #10644.32
62 Flohr, Salo253760 #10357.38
63 Filip, Miroslav253750 #9737.43
64 Nezhmetdinov, Rashid G253565 #10753.29
65 Gheorghiu, Florin253552 #9921.98
66 Saidy, Anthony F253360 #10628.87
67 Ciric, Dragoljub M253151 #10330.38
68 Nei, Iivo252752 #10634.42
69 Simagin, Vladimir P252552 #10846.77
70 Kavalek, Lubomir252450 #10822.64
71 Pfleger, Helmut252353 #11122.65
72 Fuchs, Reinhart252150 #11031.51
73 Sherwin, James T251766 #12332.43
74 Janoševic, Dragoljub251652 #11542.73
75 Padevsky, Nikola B251552 #11632.83
76 Díez del Corral, Jesús251561 #12232.98
77 Stĺhlberg, Gideon251456 #12058.18
78 Yanofsky, Daniel A251461 #12341.01
79 Gurgenidze, Bukhuti I251356 #12132.38
80 Trifunovic, Petar250851 #12255.58
81 Dzindzichashvili, Roman Y250868 #13121.90
82 Johansson, Martin250861 #12747.65
83 Byrne, Donald250663 #13035.80
84 Karaklajic, Nikola250560 #12940.10
85 Bondarevsky, Igor Z250575 #13952.88
86 Tringov, Georgy P250352 #12729.07
87 Klovans, Janis250365 #13430.97
88 Lilienthal, Andor250259 #13254.90
89 Savon, Vladimir A250259 #13125.51
90 Khasin, Abram I250065 #13743.13
91 Vladimirov, Boris T250060 #13436.87
92 O'Kelly de Galway, Albéric249952 #12954.87
93 Bisguier, Arthur B249955 #13236.48
94 Osnos, Viacheslav V249954 #13130.69
95 Minev, Nikolay N249660 #13735.23
96 Rossetto, Héctor D249553 #13443.56
97 Ciocaltea, Victor249550 #13234.21
98 Eliskases, Erich G249356 #13753.13
99 Zuckerman, Bernard249262 #14222.99
100 Bobotsov, Milko G249250 #13534.50
101 Ghitescu, Theodor249154 32.19
102 Tolush, Alexander K249172 55.91
103 Velimirovic, Dragoljub249056 23.88
104 Sakharov, Yury N249061 43.54
105 Lengyel, Levente248450 32.79
106 Pilnik, Herman248356 52.23
107 Penrose, Jonathan248060 32.48
108 Barcza, Gedeon248051 54.61
109 Rakic, Tomislav247973 31.39
110 Milev, Zdravko A247972 36.43
111 Bikhovsky, Anatoly A247864 31.91
112 Alster, Ladislav247871 38.99
113 Garcia, Raimundo247651 29.84
114 Minic, Dragoljub247552 29.07
115 Pietzsch, Wolfgang W247550 35.28
116 Kestler, Hans-Günter247466 26.30
117 Zakharov, Alexander V247262 22.48
118 Bouwmeester, Henk B247263 36.54
119 Ljavdansky, Vladimir247164
120 Nikitin, Aleksander S247164 31.18
121 Mikenas, Vladas246966 55.95
122 Smejkal, Jan246872 20.02
123 Sanguinetti, Renato246870 49.94
124 Guimard, Carlos E246859 52.98
125 Forintos, Gyözö V246852 30.67
126 Soos, Bela246756 36.07
127 Nikolac, Juraj246674 33.94
128 Nilsson, Zandor246475
129 Brinck Claussen, Bjorn246368
130 Nowak, Erwin246259
131 Trapl, Jindrich246273 24.02
132 Malich, Burkhard G245950 29.34
133 Radovici, Corvin245866 34.28
134 Damjanovic, Mato245750 39.02
135 Prins, Lodewijk245671 53.18
136 Kottnauer, Cenek245665 56.10
137 Sergievsky, Vladimir D245662 29.49
138 Flesch, Janos245451 32.50
139 Smederevac, Petar245457 43.60
140 Robatsch, Karl245252 37.46
141 Bokuchava, Alexander245273
142 Dueckstein, Andreas245256 38.66
143 Palmason, Gudmundur245168
144 Kolarov, Atanas S245160 32.08
145 Chistiakov, Alexander N244969 52.19
146 Buslaev, Alexander N244972 36.46
147 Dely, Peter244951 31.74
148 Jiménez Zerquera, Eleazar244851 37.76
149 Bukic, Enver244759 28.33
150 Udovcic, Mijo244654 45.55
151 Schmidt, Wlodzimierz244662 22.97
152 Schweber, Samuel244551 29.71
153 Radulov, Ivan244470 27.23
154 Böök, Eero244463 56.14
155 Kraidman, Yair244362 33.41
156 Kupper, Josef244366 34.06
157 Maric, Rudolf244068 38.88
158 Buljovcic, Ivan244059 29.26
159 Novopashin, Arkady243972
160 Jansa, Vlastimil243852 23.34
161 Johannessen, Svein243657 28.45
162 Milic, Borislav243559 40.45
163 Liebert, Heinz243452 29.85
164 Emma, Jaime J243454 28.20
165 Marovic, Dražen243356 28.21
166 Bogdanovic, Rajko243352 34.38
167 Blatny, Frantisek243269 32.99
168 Bertok, Mario243253 36.58
169 Lepeshkin, Vladimir243168
170 Hecht, Hans-Joachim243061 27.17
171 Mohrlok, Dieter243068
172 Medina García, Antonio A243054 46.50
173 Doda, Zbigniew243054 35.11
174 Lehmann, Heinz Dr242952
175 Vaisman, Alexander N242872
176 Nikolaevsky, Yuri V242759
177 Flores Alvarez, Rodrigo242776 52.61
178 Estrin, Yacov B242669 42.94
179 Mihaljcisin, Mihajlo242570 33.11
180 Hamann, Svend242458 25.48
181 Pelikán, Jorge242154 59.93
182 Borisenko, Georgy K242169 43.84
183 Sokolov, Vladimir242062 32.58
184 Bradvarevic, Aleksandar242057
185 Hübner, Robert242069 17.40
186 Teschner, Rudolf241970 44.12
187 Bednarski, Jacek B241952 27.05
188 Foguelman, Alberto241854 42.47
189 Andersen, Borge241863 32.03
190 Czerniak, Moshe241753 56.16
191 Barczay, Laszlo241555 30.11
192 Golz, Werner241555
193 Haag, Ervin241351 33.22
194 Mnatsakanian, Eduard A241263 27.32
195 Sofrevski, Jovan241270 30.62
196 Enevoldsen, Jens241162 58.52
197 Honfi, Karoly241050 35.43
198 van Scheltinga, Tjeerd D240954 52.07
199 Zinn, Lothar240954 28.03
200 Doroshkievich, Vladimir K240959 28.26
201 Clarke, Peter H240962
202 Neikirkh, Oleg N240761 52.06
203 Langeweg, Kick240753 29.07
204 Foldi, Jozsef240671 32.35
205 Kluger, Guyla240653 52.21
206 Nikolic, Stanimir240557 31.18
207 Fichtl, Jirí240457 45.12
208 Carmona, Jose Luis240465
209 Porat, Yosef240362 56.81
210 Puc, Stojan240371 44.97
211 Zuidema, Coenraad240255
212 Filipowicz, Andrzej240155 27.88
213 Torán Albero, Román240157 34.48
214 Aloni, Izak240064
215 Westerinen, Heikki MJ240064 21.92
216 Blau, Max239971 47.28
217 Haygarth, Michael J239874
218 Kozma, Julius239759 36.83
219 Tröger, Paul239768 52.75
220 Sliwa, Bogdan239655 44.16
221 Planinc, Albin239574 21.95
222 Alatortsev, Vladimir A239573 56.87
223 Lee, Peter N239464
224 Seifert, Milan239375 25.82
225 Kuijpers, Franciscus Antonius239254
226 Tatai, Stefano239266 28.02
227 Skold, Kristian239166
228 Kinnmark, Ove239164 21.27
229 Ujtelky, Maximilián238956 50.94
230 Hennings, Artur238854 25.72
231 Van den Berg, Carel Benjamin238855
232 Kotkov, Yuri M238671
233 Cuéllar Gacharná, Miguel238660 49.37
234 Ree, Hans238557 21.54
235 Myagmarsuren, Lhamsuren238472 28.12
236 Ostojic, Predrag238458 28.11
237 Henneberke, Franciscus238170
238 Osmanagic, Dusan238069
239 Drozd, Ryszard237875 31.78
240 Marsalek, Josef237874 31.04
241 Adorján, András237865 15.99
242 Djurovic, Dejan237874
243 Popov, Luben237772 30.18
244 Bukhman, Eduard237769 24.81
245 Wexler, Bernardo237660 40.99
246 Kozomara, Vladimir237564
247 Mecking, Henrique237462 14.19
248 Bakulin, Nikolac I237369
249 Adamski, Jan237368 22.39
250 Wade, Robert Graham237353
251 Bachtiar, Arovah237262 32.02
252 Golombek, Harry237157 55.08
253 Kuzmin, Gennady P237168 20.20
254 Eising, Johannes237068 30.83
255 Balcerowski, Witold237054 30.64
256 Pogats, Jozsef237057 37.72
257 Bolbochán, Jácobo237059 59.26
258 Blom, Kaj236971
259 Sandor, Bela236970 46.30
260 Rodriguez Gonzales, Jesus236863
261 Augustin, Josef236859 23.86
262 Plater, Kazimierz236870 51.08
263 Rubinetti, Jorge A236453 20.99
264 Walther, Edgar236469 35.27
265 Kovacs, Laszlo M236153 27.49
266 Kostro, Jerzy236065 29.18
267 Ekenberg, Bengt236076
268 Lee, F.236067
269 Pithart, Frantisek235960
270 Baumbach, Friedrich235972 30.56
271 Mestrovic, Zvonimir235859 21.45
272 Littlewood, John Eric235675
273 Litsberger, Rune235671
274 Naranja, Renato235676 25.52
275 Bazan, Osvaldo235670 31.46
276 Martinez, Gustavo235565 22.40
277 Roth, Rolf235566 27.82
278 Bhend, Edwin235571 34.56
279 Pirc, Vasja235559 58.28
280 Gerusel, Mathias235568 28.15
281 Brzozka, Stefan235561
282 Thorbergsson, Freysteinn235468
283 Navarovszky, Laszlo235354 32.99
284 Rocha, Antonio235258 21.79
285 Gat, Israel235164
286 Prameshuber, Aleksander235171
287 Barendregt, Johan Teunis235058
288 Grabczewski, Romuald235062 34.15
289 Rolland, Pierre235068
290 Rajkovic, Dusan235067 23.78
291 Tompa, Janos234963 18.91
292 Camara, Helder234962 29.15
293 Kagan, Shimon234964 23.98
294 Cruz, Raul C234756
295 Kramer, Haije234762 48.35
296 Holaszek, Hans234676
297 Cobo Arteaga, Eldis234556
298 Ujtumen, Tudev234462 26.59
299 Eisinger, Max Jr234373 56.76
300 Stefanov, P.234265
301 Pietrusiak, Bogdan234156 32.71
302 Jakobsen, Ole234066 23.45
303 Van Geet, Dirk Daniel233967 34.08
304 Menvielle Lacourrelle, Augusto233861 27.63
305 Quinones, Oscar Carillo233857
306 Jongsma, Alexander233771 27.83
307 Knezevic, Milorad233770 29.42
308 Cebalo, Mišo233572 21.15
309 Filep, Tibor233568 30.26
310 Gromek, Jozef233459 34.94
311 Quinteros, Miguel A233473 18.26
312 Stepak, Yedael233364 25.61
313 Jovcic, Milan233263 36.49
314 Szily, József233265 52.50
315 Starck, Bodo233170 31.47
316 Besser, Hans233069 31.16
317 Ulvestad, Olaf232962 53.43
318 Szilágyi, György232954 44.74
319 Domnitz, Zadok232861 32.46
320 Letelier Martner, René232656 50.53
321 Gaprindashvili, Nona232466 24.90
322 Gunsberger, A.232371
323 Gereben, Ernö232363 58.78
324 Franz, Joachim232275 31.89
325 Saborido, Rafael231966
326 Littlewood, Norman231961
327 Jenei, Ferenc231872 50.44
328 Besztercsenyi, Tibor231864 28.96
329 Perez Perez, Francisco Jose231757
330 Csom, István231555 25.82
331 Šajtar, Jaroslav231462 44.33
332 Yepez Obando, Olavo231461
333 Gojak, Ilija231475 31.85
334 Bielicki, Carlos231354 25.87
335 Soloviev, Vladimir A231370 38.11
336 Neukirch, Detlef231262 25.64
337 Kieninger, Georg231264 63.81
338 Polgar, Istvan231157 21.35
339 Liptay, Laszlo231160 28.74
340 Cuartas, Carlos231065 25.63
341 Witkowski, Stefan230963 34.51
342 Kerkhoff, Leo J230876 21.38
343 Gasztonyi, Endre230870
344 Luckis, Marcos230859 61.20
345 Schoeneberg, Manfred230676 19.73
346 Hartston, William R230567 18.63
347 Vranesic, Zvonko230565 27.49
348 Palermo, Vicente230457 34.05
349 Sloth, Jorn230469 21.57
350 Dunkelblum, Arthur230273 59.93
351 Varnusz, Egon230159 32.38
352 Beni, Alfred229863 42.82
353 Hindle, Owen M229862 26.05
354 Garcia Orus, Francisco229764
355 Szilagyi, Peter229462 28.42
356 Behrensen, Jorge229258 35.92
357 Peretz, Malkiel229067 22.80
358 Horberg, Beng Eric229064
359 Ilievski, Dimitar228974 24.60
360 Ortega, Rogelio228858
361 Tarnowski, Alfred228665 49.08
362 Pavlov, Mircea228661 28.55
363 Rodriguez, Al228671
364 De las Heras, Juan Carlos228570 25.66
365 Portisch, Ferenc228560 26.97
366 Visier Segovia, Fernando228263 23.16
367 Bronstein, Luis228169 19.82
368 Sydor, Andrzej228157 29.24
369 Ankerst, Marjan228069 23.29
370 Ader Hausman, Walter227967
371 Santa Cruz, Hugo227961
372 Pilnick, Carl227976 42.27
373 Scanavino, Eduardo227969
374 Pugach, Mario227862
375 Hajtun, Josef227660
376 Susic, Idriz227472 29.97
377 Moehring, Guenther227357 29.35
378 Garcia, Gilberto227257
379 Shashin, Boris S226972
380 Thorsteinsson, Bjorn226867
381 Reinhardt, Enrique H226769 63.01
382 Cafure, Emilio226661
383 Faragó, Iván226463 19.99
384 De Rooi, Paul226364 37.59
385 Berger, Bela226275 34.63
386 Schroeder, Hannes226176
387 Delander, Adolf226176 31.38
388 Aloni, Yoel226074
389 Boey, Josef225865 31.87
390 Leban, Slavko225374
391 Zinser, Sylvain225357
392 Aitken, James M225175 57.43
393 Gadia, Olicio225062
394 Mazzoni, Guy225059 31.51
395 Franklin, Michael J225073 35.16
396 Alvarez del Monte, Jose Luis225057
397 Roos, Michel224768 33.59
398 Studenetzky, Moises224774 32.74
399 Lewi, Jerzy224566
400 Boutteville, Cesar224264 48.76
401 Schroeder, E.224076
402 Durao, Joaquim224058 35.43
403 Opocenský, Karel224061 74.15
404 Ozsvath, Andras224062 36.62
405 Cotta, Eduardo223476
406 Garcia Martinez, Silvino223359 21.74
407 Litkiewicz, Kurt223176 31.86
408 Aaron, Manuel223175 30.25
409 Sapi, Laszlo222958 31.03
410 Miranda, Marcio MC222863
411 Spassov, Liuben222774 23.02
412 Hartoch, Robert G222666
413 Füster, Géza222166 56.12
414 Csulits, Anton222174 23.99
415 Garcia, JM.222073
416 Molteni, O.222073
417 Suttles, Duncan221873 20.28
418 Bakali, M.221871
419 Serwinski, Benedykt221471
420 Partos, Charles221463 29.64
421 Garcia, Horacio221367
422 Palacios de la Prida, Ernesto221173 22.38
423 Gasic, Bozidar221162 28.47
424 Bokor, Istvan220871 30.18
425 Farah, Rodolfo220774 34.70
426 Kristinsson, Jon220667 23.78
427 Pelitov, Dimitar220363 35.80
428 Ortega, L.220264
429 Prelovszky, Laszlo220162
430 Lachut, Jan220069
431 Fonrobert, Gert Wolfgang219575
432 Koberl, Ferenc219469
433 Sigurjónsson, Gudmundur219271 18.52
434 Zoltek, Tadeusz218869 28.58
435 Nicolai, Werner218873
436 Hodakowsky, Georg218676
437 Godoy Bugueno, David A218361
438 Calneggia, Raul218267
439 Malcanek, Oldrich218167
440 Galvez Extremera, Francisco217971
441 Neamtu, Serban217865 32.14
442 Luna, Julio217768
443 Paoli, Enrico217555 58.22
444 Waltemathe, A.217471
445 Kolbak, Jens217076 21.16
446 Figueroa, Eduardo216871
447 Struner, Philipp216775
448 Duin, L.216671
449 Littleton, Michael Flannan216467
450 Ong Yok Hwa216164
451 Brameyer, Hermann215776 26.63
452 Nerenz, Werner215776
453 Chemes, L.215673
454 Fletzer, Gino215473
455 Perez Cascella, Julio215471 25.95
456 Ramirez, R.215471
457 Halfdanarson, Jon215471
458 Schinzel, Wladyslaw215274 22.85
459 de Souza Mendes, Joăo215062 73.69
460 Silva Nazzari, Raul215074
461 Ziembinski, Marian215069 37.72
462 Degenhardt, Norbert214976
463 Bruentrup, Dieter214466
464 Schroeder, R.213876
465 Calero, Ivan213363
466 Roux Cabral, Fausto213066
467 Gonzalez Haro, E.212566
468 Conrady, Alphonse212164
469 Hesse, Peter212076 21.51
470 Nielsen, Jonny211974
471 Iglesias, Alfredo211566
472 Boehnisch, Manfred211175 24.95
473 Mondaini, Giulio Cesare209569
474 Capece, Adolivio209569
475 Arraya, Jorge208666

These ratings, calculated as of March 31, 1966, incorporate all games (against rated opponents) played in the time between April 1, 1965 and March 31, 1966, along with the ratings that were already calculated as of March 31, 1965. 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 March 31, 1966. This represents the player's estimated strength on April 1, 1966.

+/- 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 April 1, 1966. The +/- value represents the standard deviation of that estimate; the player's true strength on April 1, 1966 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 April 1, 1966. 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 March 31, 1966. 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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