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Top 10 active players as of August 31, 1973

  #  

Player Rating +/-
1 Fischer, Robert J289455
2 Karpov, Anatoly E273749
3 Korchnoi, Viktor L272349
4 Tal, Mikhail272148
5 Portisch, Lajos271148
6 Spassky, Boris V269949
7 Stein, Leonid Z269851
8 Petrosian, Tigran V269449
9 Polugaevsky, Lev A269049
10 Geller, Efim P268650

About these ratings

Top 500 active players as of August 31, 1973

  #  

Player Rating +/- Best? 75%? Age
1 Fischer, Robert J28945595.4% #130.48
2 Karpov, Anatoly E2737491.3% #922.27
3 Korchnoi, Viktor L2723490.7% #1242.44
4 Tal, Mikhail2721480.6% #1236.81
5 Portisch, Lajos2711480.5% #1436.41
6 Spassky, Boris V2699490.2% #1836.59
7 Stein, Leonid Z2698510.3% #1938.80
8 Petrosian, Tigran V2694490.2% #1944.21
9 Polugaevsky, Lev A2690490.2% #2138.78
10 Geller, Efim P2686500.1% #2348.50
11 Hübner, Robert2681510.1% #2524.82
12 Larsen, Bent267449 #2738.49
13 Smyslov, Vassily V266549 #3152.44
14 Byrne, Robert E265852 #3545.36
15 Tukmakov, Vladimir B264650 #4027.46
16 Dvoretsky, Mark I264255 #4525.73
17 Hort, Vlastimil264047 #4329.64
18 Savon, Vladimir A263850 #4532.92
19 Furman, Semen A263653 #4752.75
20 Keres, Paul263551 #4757.65
21 Krogius, Nikolay V263456 #5043.11
22 Mecking, Henrique263354 #4921.61
23 Smejkal, Jan263148 #4927.44
24 Grefe, John A2631670.1% #5625.98
25 Gligoric, Svetozar262748 #5150.58
26 Kavalek, Lubomir262249 #5430.06
27 Ljubojevic, Ljubomir261948 #5522.83
28 Vasiukov, Evgeny A261951 #5740.49
29 Olafsson, Fridrik261759 #6238.60
30 Suetin, Alexey S261553 #6146.79
31 Bronstein, David I261350 #6049.53
32 Gipslis, Aivars261156 #6436.56
33 Balashov, Yury S261150 #6224.47
34 Uhlmann, Wolfgang261149 #6238.42
35 Schmid, Lothar M260660 #7045.31
36 Lein, Anatoly260554 #6942.43
37 Kuzmin, Gennady P260353 #6927.62
38 Taimanov, Mark E260251 #6947.57
39 Browne, Walter S260050 #7024.64
40 Averbakh, Yury L259960 #7551.56
41 Panno, Oscar R259850 #7138.46
42 Kholmov, Ratmir D259751 #7348.30
43 Vaganian, Rafael A259551 #7421.87
44 Sanguinetti, Raúl C259563 #8040.58
45 Szabó, László259349 #7556.45
46 Gufeld, Eduard E259352 #7737.45
47 Reshevsky, Samuel H258752 #8161.76
48 Unzicker, Wolfgang258554 #8448.18
49 Gheorghiu, Florin258348 #8229.40
50 Benko, Pal C258350 #8345.13
51 Dzindzichashvili, Roman Y258255 #8729.32
52 Nezhmetdinov, Rashid G258174 #9960.71
53 Liberzon, Vladimir M258160 #9136.44
54 Andersson, Ulf258047 #8422.18
55 Tseshkovsky, Vitaly V257957 #9028.93
56 Pachmann, Ludek257561 #9649.30
57 Ivkov, Borislav257547 #8839.80
58 Najdorf, Miguel257251 #9363.38
59 Klovans, Janis257059 #10138.39
60 Planinc, Albin256850 #9629.37
61 Matulovic, Milan256550 #9838.22
62 Razuvaev, Yury S256354 #10227.88
63 Evans, Larry M256357 #10441.44
64 Darga, Klaus V256156 #10539.52
65 Podgaets, Mikhail Y256056 #10626.11
66 Nei, Iivo255860 #11041.83
67 Mukhin, Mikhail A255754 #10725.53
68 Ribli, Zoltán255749 #10421.98
69 Csom, István255749 #10433.25
70 Gurgenidze, Bukhuti I255563 #11439.80
71 Parma, Bruno255549 #10631.67
72 Lombardy, William J255359 #11335.74
73 Bagirov, Vladimir K255355 #11337.04
74 Velimirovic, Dragoljub254851 #11431.30
75 Pfleger, Helmut254453 #11930.07
76 Hecht, Hans-Joachim254149 #11834.59
77 Kapengut, Albert Z254155 #12329.16
78 Ciric, Dragoljub M253965 #12937.80
79 Adorján, András253949 #12123.42
80 Beliavsky, Alexander G253860 #12719.71
81 Commons, Kim S253865 #13122.11
82 Matanovic, Aleksandar253851 #12343.27
83 Kupreichik, Viktor D253765 #13124.16
84 Murey, Yakov253670 #13532.08
85 Filip, Miroslav253553 #12644.84
86 Grigorian, Karen A253459 #13125.98
87 Karasev, Vladimir I253461 #13235.21
88 Gulko, Boris F253473 #13926.56
89 Zhidkov, Valery S253362 #13433.98
90 Platonov, Igor V253157 #13339.62
91 Díez del Corral, Jesús252954 #13240.40
92 Dementiev, Oleg I252973 #14335.66
93 Radulov, Ivan252749 #13134.65
94 Bilek, István252649 #13241.05
95 Antoshin, Vladimir S252656 #13644.30
96 Lutikov, Anatoly S252559 #13840.57
97 Romanishin, Oleg M252465 #14321.64
98 Zaitsev, Igor A252463 #14235.26
99 Donner, Johannes H252348 #13546.15
100 Osnos, Viacheslav V252260 #14338.10
101 Addison, William G252168 39.76
102 Kurajica, Bojan252053 25.79
103 Hartston, William R251953 26.05
104 Kovacevic, Vladimir251859 31.43
105 Quinteros, Miguel A251849 25.68
106 Karner, Hillar251659 38.09
107 Marovic, Dražen251552 35.63
108 Tarjan, James E251564 21.53
109 Shamkovich, Leonid A251456 50.25
110 Kraidman, Yair251355 40.83
111 Nikolaevsky, Yuri V251265
112 Rogoff, Kenneth S251264 20.44
113 Suttles, Duncan251254 27.69
114 Palatnik, Semen A251161 23.43
115 Timman, Jan H251048 21.71
116 Jansa, Vlastimil250849 30.76
117 Bobotsov, Milko G250853 41.91
118 Bukic, Enver250256 35.75
119 Schmidt, Wlodzimierz250151 30.39
120 Forintos, Gyözö V250050 38.09
121 Padevsky, Nikola B249854 40.26
122 Sosonko, Gennadi249856 30.29
123 O'Kelly de Galway, Albéric249659 62.29
124 Malich, Burkhard G249551 36.76
125 De Fotis, Gregory249468 21.73
126 Minic, Dragoljub249252 36.49
127 Teschner, Rudolf249169 51.54
128 Karaklajic, Nikola249060 47.52
129 Ciocaltea, Victor248849 41.62
130 Tseitlin, Mark D248760 29.93
131 Zilberstein, Valery I248556 30.38
132 Rashkovsky, Nukhim N248459 27.37
133 Soltis, Andrew E248462 26.26
134 Keene, Raymond248449
135 Barczay, Laszlo248458 37.53
136 Dueball, Juergen248354 28.42
137 Maric, Rudolf248271 46.30
138 Sax, Gyula248250 22.20
139 Tringov, Georgy P248252 36.48
140 Schweber, Samuel248155 37.12
141 Antunac, Goran248163 28.37
142 Ghitescu, Theodor248053 39.60
143 Lengyel, Levente248050 40.22
144 Sigurjónsson, Gudmundur247760 25.93
145 Georgadze, Tamaz V247660 25.81
146 Kaplan, Julio P247554 23.10
147 Barcza, Gedeon247557 62.03
148 Mikenas, Vladas247570 63.37
149 Estrin, Yacov B247564 50.36
150 Rodriguez, Ruben247370 26.73
151 Buljovcic, Ivan247367 36.68
152 Shereshevsky, Mikhail I247376 23.36
153 Nemet, Ivan247168 30.38
154 Popov, Luben247054 37.59
155 Byrne, Donald247061 43.22
156 Dely, Peter247056 39.15
157 Gerusel, Mathias247055 35.57
158 Pomar Salamanca, Arturo246950 41.99
159 Ornstein, Axel246959 21.35
160 Pilnik, Herman246955 59.65
161 Tatai, Stefano246949 35.44
162 Hamann, Svend246855 32.89
163 Enklaar, Bertus F246851
164 Stean, Michael F246856 19.98
165 Yanofsky, Daniel A246859 48.43
166 Zuckerman, Bernard246762 30.42
167 Ree, Hans246648 28.95
168 Minev, Nikolay N246657 42.65
169 Pribyl, Josef246651 25.88
170 Sveshnikov, Evgeny E246667 23.55
171 Botterill, George Steven246559
172 Ubilava, Elizbar E246474 23.01
173 Radev, Nikolai246474 34.70
174 Damjanovic, Mato246451 46.44
175 Amos, Bruce M246367 26.67
176 Balshan, Amikam246368
177 Anikaev, Yury246369 25.17
178 Espig, Lutz246353 24.65
179 Spiridonov, Nikola246257 35.51
180 Alburt, Lev O246265 28.03
181 Rossetto, Héctor D246153 50.97
182 Rytov, Boris245962
183 Rukavina, Josip245952 30.76
184 Calvo Minguez, Ricardo245853 29.85
185 Robatsch, Karl245756 44.87
186 Schauwecker, Meinrad245668 22.45
187 Doroshkievich, Vladimir K245565 35.68
188 Bogdanovic, Rajko245564 41.79
189 Zuidema, Coenraad245553
190 Johannessen, Svein245561 35.87
191 Ghizdavu, Dumitru245456 24.28
192 Messing, Hrvoje245364 33.10
193 Bertok, Mario245366 43.99
194 Jansson, Borje245256 31.47
195 Biyiasas, Peter245155 22.78
196 Vranesic, Zvonko245163 34.90
197 Sofrevski, Jovan245059 38.04
198 Torán Albero, Román245061 41.89
199 Williams, Arthur Howard245057
200 Cvetkovic, Srdjan244966 27.51
201 Faragó, Iván244757 27.41
202 Cosulich, Roberto244760
203 Capelan, Guenter244661 41.09
204 Mišta, Ladislav244668 29.83
205 Hennings, Artur244652 33.14
206 Basagic, Zlatko244573 25.70
207 Liebert, Heinz244454 37.27
208 Stanciu, Traian244372 37.96
209 Kuijpers, Franciscus Antonius244362
210 Moiseev, Oleg L244376 48.32
211 Torre, Eugenio244251 21.82
212 Nikolic, Stanimir244274 38.60
213 Knezevic, Milorad244260 36.83
214 McKay, Roderick M244272 21.55
215 Garcia, Raimundo244252 37.26
216 Weinstein, Norman244172 22.90
217 Westerinen, Heikki MJ244050 29.34
218 Mednis, Edmar J243960 36.44
219 Lehmann, Heinz Dr243959
220 Bednarski, Jacek B243850 34.47
221 Saidy, Anthony F243851 36.29
222 Penrose, Jonathan243859 39.89
223 Rakic, Tomislav243875 38.80
224 Suess, Alois243762 30.22
225 Cortlever, Nicolaas243765 58.21
226 Makarichev, Sergey Y243660 19.79
227 Haygarth, Michael J243674
228 Kuindzhi, Alexander243661
229 Christoph, Manfred243566 42.26
230 Vooremaa, Andres243272 29.12
231 Hase, Juan Carlos243256
232 Rossolimo, Nicolas243264 63.51
233 Kirov Ivanov, Nino243266 27.97
234 Mariotti, Sergio243158 27.06
235 Cuasnicu, Oscar243160 30.85
236 Bisguier, Arthur B243053 43.89
237 Dueckstein, Andreas243066 46.08
238 Ojanen, Kaarle Sakari243075
239 Vukic, Milan243057 30.03
240 Haag, Ervin242964 40.64
241 Langeweg, Kick242850 36.48
242 Sahovic, Dragutin242670 33.06
243 Peretz, Malkiel242660 30.23
244 Plachetka, Jan242653 28.54
245 Kestler, Hans-Günter242657 33.72
246 Honfi, Karoly242554 42.84
247 Estevez Morales, Guillermo242555
248 Zwaig, Arne242564
249 Krnic, Zdenko242463 25.91
250 Kozma, Julius242466 44.25
251 Moe, Mogens242473 29.47
252 Sliwa, Bogdan242372 51.57
253 Jakobsen, Ole242254 30.86
254 Hug, Werner242251 20.97
255 Ostojic, Predrag242154 35.53
256 Schiffer, Karl Josef242169
257 Ek, Hans242063 44.90
258 Nowak, Erwin242073
259 Pedersen, Karl242069 32.92
260 Drimer, Dolfi241971 38.87
261 Szmetan, Jorge241856 23.26
262 Ungureanu, Emil241858 36.83
263 Foguelman, Alberto241868 49.88
264 Rodriguez Vargas, Orestes241854 30.16
265 Janoševic, Dragoljub241752 50.15
266 Nicevski, Risto241556 28.18
267 Brinck Claussen, Bjorn241571
268 Flesch, Janos241469 39.91
269 Kosanski, Stanko241273 31.86
270 Kolarov, Atanas S241167 39.50
271 Spassov, Liuben241164 30.44
272 Scholl, Eddie C241054 28.87
273 Hernandez, Roman241066 23.77
274 Portisch, Ferenc240962 34.39
275 Campos Lopez, Mario240858 30.29
276 Tompa, Janos240769 26.34
277 Jiménez Zerquera, Eleazar240762 45.18
278 Cuéllar Gacharná, Miguel240756 56.79
279 Debarnot, Roberto240655 26.07
280 Korensky, Valeri S240663
281 Myagmarsuren, Lhamsuren240558 35.54
282 Toth, Bela240558 30.37
283 Doda, Zbigniew240452 42.53
284 Ujtumen, Tudev240457 34.01
285 Cobo Arteaga, Eldis240455
286 Ermenkov, Evgenij240355 23.92
287 Soos, Bela240264 43.48
288 Eising, Johannes240260 38.25
289 Bohosjan, Sarkis240160 32.43
290 Filipowicz, Andrzej240054 35.30
291 Clarke, Peter H240068
292 Gaprindashvili, Nona240065 32.33
293 Gilden, Lawrence C240069
294 Adamski, Jan240054 29.80
295 Chellstorp, Craig V239965
296 Pytel, Krzysztof239951 28.29
297 Porat, Yosef239964 64.23
298 van Scheltinga, Tjeerd D239857 59.48
299 Pritchett, Craig William239761
300 Martz, William E239755
301 Siaperas, Triantafyllos239662 41.08
302 Ilievski, Dimitar239668 32.02
303 Geller, Uzi239669 42.59
304 Liljedahl, Lennart239456 26.01
305 Cuartas, Carlos239460 33.04
306 Friedman, Shmuel239463
307 Lechtynsky, Jiri239358 25.77
308 Rubinetti, Jorge A239352 28.42
309 Kupka, Slavoj239065 31.15
310 Vujacic, Borivoje239067 23.96
311 Boey, Josef239065 39.29
312 Andersen, Borge238972 39.45
313 Ivanovic, Božidar238963 27.02
314 Markland, Peter R238952 22.38
315 Rajkovic, Dusan238857 31.21
316 Belmonte, Juan S238871
317 Barle, Janez238862 21.44
318 Rocha, Antonio238773 29.22
319 Mestrovic, Zvonimir238770 28.87
320 Hartoch, Robert G238650
321 Karklins, Andrew238563 26.38
322 Blau, Max238573 54.70
323 Sydor, Andrzej238356 36.66
324 Vogt, Lothar H238253 21.62
325 Bukal, Vladimir Sr238063 33.83
326 Mestel, A Jonathan238058 16.47
327 Bellin, Robert238057 21.17
328 Pedersen, Eigil238064
329 Řgaard, Leif237959 21.65
330 Miles, Anthony J237967 18.36
331 Basman, Michael J237971 27.46
332 Corden, Martyn J237872
333 Kinnmark, Ove237864 28.69
334 Czerniak, Moshe237858 63.58
335 Zinn, Lothar237859 35.45
336 Muco, Fatos237769 24.37
337 Lundin, Erik237771 69.16
338 Kristiansen, Erling237760 36.71
339 Kostro, Jerzy237652 36.60
340 Peev, Peicho Chonev237656 33.41
341 Eley, Brian237556
342 Betancort Curbelo, Juan237471 31.04
343 Fichtl, Jirí237359 52.54
344 Mititelu, Gheorghe237367 38.83
345 Jankovec, Ivan237371 34.87
346 Vadasz, Laszlo237359 25.59
347 Wade, Robert Graham237254
348 Pelikán, Jorge237260 67.36
349 Naranja, Renato237258 32.93
350 Masic, Ljubomir237157 37.15
351 Deze, Anton237159
352 Belkadi, Ridha237166 48.35
353 Balcerowski, Witold237064 38.06
354 Trapl, Jindrich237066 31.44
355 Kovacs, Laszlo M236963 34.90
356 Hansson, Dan236971 21.22
357 Roehrl, Karl236965 32.64
358 Kaldor, Avraham236960 26.28
359 Bhend, Edwin236966 41.97
360 Kagan, Shimon236855 31.40
361 Olsson, Ake236862 39.33
362 Poulsson, Eivind236769 30.74
363 Pavlov, Mircea236767 35.96
364 Wirthensohn, Heinz236659 22.32
365 Piasetski, Leon David236575
366 Sloth, Jorn236563 28.98
367 Mueller, Klaus Uwe236565
368 Polgar, Istvan236461 28.76
369 Partos, Charles236462 37.06
370 Knaak, Rainer F236354 20.46
371 Ekenberg, Bengt236371
372 Brostrom, Goran236376 31.34
373 Kluger, Guyla236369 59.63
374 Hohler, Peter236263 32.38
375 Whiteley, Andrew J236261 26.23
376 Puc, Stojan236261 52.39
377 Shaw, Terrey Ian236170
378 Hlousek, Zdenek236072
379 German, Eugenio Maciel236069
380 Wright, Daniel236073
381 Akvist, Hakan235965 31.84
382 Pietrusiak, Bogdan235961 40.13
383 Nagy, Ervin235862 28.09
384 Kunsztowicz, Uwe235857 29.62
385 Holaszek, Hans235875
386 Schoeneberg, Manfred235856 27.15
387 Jacobsen, Bo235765 24.72
388 Hazai, Laszlo235765 20.21
389 Emma, Jaime J235757 35.62
390 Shabanov, Yury F235774 35.80
391 Kanko, Ilkka235775 38.78
392 Garcia Martinez, Silvino235752 29.16
393 Baumbach, Friedrich235761 37.97
394 Van Riemsdijk, Herman C235659 25.01
395 Denker, Arnold S235465 59.53
396 De Greif, Boris235467 43.55
397 Bachtiar, Arovah235367 39.43
398 Gasiorowski, Ryszard235369 37.72
399 Harandi, Khosro235263 22.99
400 Pustina, Ylvi235263
401 Levy, Louis235171 52.56
402 Brond, Victor235170
403 Witkowski, Stefan235073 41.92
404 Bellon Lopez, Juan Manuel234953 23.31
405 Holm, Sejer234857 34.06
406 Saren, Ilkka J234762 33.29
407 Quinones, Oscar Carillo234762
408 Gasic, Bozidar234768 35.88
409 Moehring, Guenther234762 36.77
410 Levy, David Neil Lawrence234660
411 Fuller, Maxwell L234570 28.59
412 Jongsma, Alexander234466 35.25
413 Serwinski, Benedykt234372
414 Kupper, Josef234274 41.47
415 Romm, Meir234064 34.19
416 Medina García, Antonio A233851 53.91
417 Szilágyi, György233762 52.16
418 Nordstrom, Felix233769 29.24
419 Tan Lian Ann233659
420 Krabbe, Tim233669 30.38
421 Webb, Simon233664 24.22
422 Cafferty, Bernard233560 39.18
423 Palermo, Vicente233564 41.47
424 Kushnir, Alla233561
425 Helmertz, Per Inge233576
426 Kaufman, Larry C233467 25.79
427 Reicher, Emanoil233464 43.43
428 Grabczewski, Romuald233459 41.57
429 Fridh, Anton233371 53.70
430 Uddenfeldt, Dan233368 22.42
431 Troianescu, Octav233369 57.57
432 Vila Dupla, Aurelio233368 14.35
433 Visier Segovia, Fernando233259 30.58
434 Cibulka, Vladimir233062 31.83
435 Banas, Jan232856 26.24
436 Mikhalchishin, Adrian B232876 18.79
437 Domnitz, Zadok232763 39.87
438 Maciejewski, Andrzej232659 22.14
439 Carvalho, Herbert Abreu232565 18.91
440 Camara, Helder232457 36.57
441 Garcia, Horacio232471
442 Van Geet, Dirk Daniel232465 41.50
443 Van Baarle, C John232361 28.37
444 Sumiacher, Carlos232268
445 Cardoso, Radolfo Tan232254
446 Friedgood, David232272 27.14
447 Sznapik, Aleksander232255 22.56
448 Poch, Cesar Guillermo232261
449 Rebizzo, Cayetano232169 65.07
450 Kristinsson, Jon232158 31.21
451 Boersma, Paulus A232065 25.12
452 Franzen, Jozef232067 27.57
453 Bronstein, Luis231963 27.25
454 Gereben, Ernö231859 66.20
455 Schaufelberger, Heinz231859 25.78
456 Janetschek, Karl231766 33.37
457 Cornelis, Frans B231671 31.65
458 Skalkotas, Nikolaos231564 23.94
459 Moles, John231465 23.94
460 Van den Berg, AMJ.231366
461 Zichichi, Alvise231361 35.16
462 Silva, Fernando231364 23.07
463 Hoen, Ragnar231264 32.90
464 Sarapu, Ortvin231165 49.61
465 Nowak, Ignacy231173 24.64
466 Estimo, Samuel230973
467 Van Seters, Frits230866
468 Juarez, Carlos Eleodoro230761 35.17
469 Lombard, Andre230654 22.94
470 Casas, Fernando230661 47.03
471 Zoltek, Tadeusz230566 35.99
472 Eales, Richard G230571
473 Lekander, Rolf230471 26.66
474 Gasztonyi, Endre230465
475 Franklin, Michael J230468 42.58
476 Wagman, Stuart230368 54.30
477 Garcia, H.230369
478 Pinto Paiva, Jose230275
479 Ghinda, Mihail Viorel230173 24.10
480 Wotulo, Max230162 41.07
481 Rodriguez Cordoba, Jesus R230067 24.21
482 Menvielle Lacourrelle, Augusto230066 35.05
483 Agdamus, Jose Luis229870
484 Manasterski, Lutoslaw229763 36.56
485 Ujtelky, Maximilián229765 58.36
486 Knox, Victor W229774 28.61
487 Wibe, Terje229559 25.90
488 Toth, Peter229574 32.98
489 Meduna, Eduard229576 22.97
490 Leskovar, Mario229363 22.88
491 Ardiansyah, Haji229356 21.74
492 Eperjesi, Laszlo229165 30.29
493 Durao, Joaquim228962 42.84
494 Borngaesser, Rene228875 21.94
495 Chemin, Vitorio228774 23.31
496 Littleton, Michael Flannan228774
497 Osterman, Rudolf228762 27.11
498 Nobrega, Adaucto da228671
499 Novak, Ivan228660 30.60
500 Belliard, Luis228565

These ratings, calculated as of August 31, 1973, incorporate all games (against rated opponents) played in the time between September 1, 1972 and August 31, 1973, along with the ratings that were already calculated as of August 31, 1972. 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, 1973. This represents the player's estimated strength on September 1, 1973.

+/- 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, 1973. The +/- value represents the standard deviation of that estimate; the player's true strength on September 1, 1973 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, 1973. 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, 1973. 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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