< April 30, 1973     Back to date list    August 31, 1973 >

Top 10 active players as of June 30, 1973

  #  

Player Rating +/-
1 Fischer, Robert J289453
2 Karpov, Anatoly E273649
3 Korchnoi, Viktor L272149
4 Tal, Mikhail272048
5 Spassky, Boris V271249
6 Portisch, Lajos271048
7 Stein, Leonid Z269851
8 Petrosian, Tigran V269549
9 Polugaevsky, Lev A268949
10 Geller, Efim P268650

About these ratings

Top 500 active players as of June 30, 1973

  #  

Player Rating +/- Best? 75%? Age
1 Fischer, Robert J28945396.0% #130.31
2 Karpov, Anatoly E2736491.1% #922.10
3 Korchnoi, Viktor L2721490.6% #1242.27
4 Tal, Mikhail2720480.5% #1236.64
5 Spassky, Boris V2712490.4% #1436.42
6 Portisch, Lajos2710480.3% #1536.24
7 Stein, Leonid Z2698510.2% #1938.63
8 Petrosian, Tigran V2695490.2% #1944.04
9 Polugaevsky, Lev A2689490.1% #2138.61
10 Geller, Efim P2686500.1% #2248.33
11 Hübner, Robert2680510.1% #2524.65
12 Larsen, Bent267149 #2838.32
13 Smyslov, Vassily V266649 #3052.27
14 Byrne, Robert E265752 #3545.19
15 Tukmakov, Vladimir B264550 #4027.29
16 Hort, Vlastimil264147 #4229.47
17 Savon, Vladimir A263850 #4532.76
18 Furman, Semen A263553 #4752.58
19 Mecking, Henrique263454 #4921.44
20 Keres, Paul263451 #4857.48
21 Krogius, Nikolay V263356 #5042.93
22 Smejkal, Jan263248 #4727.27
23 Grefe, John A2631670.1% #5625.81
24 Dvoretsky, Mark I263158 #5325.56
25 Gligoric, Svetozar262848 #5050.41
26 Kavalek, Lubomir262349 #5329.88
27 Vasiukov, Evgeny A262250 #5440.32
28 Ljubojevic, Ljubomir261948 #5622.66
29 Olafsson, Fridrik261759 #6138.43
30 Bronstein, David I261450 #5949.36
31 Suetin, Alexey S261453 #6146.62
32 Balashov, Yury S261350 #6124.30
33 Gipslis, Aivars261156 #6436.39
34 Uhlmann, Wolfgang260948 #6238.25
35 Schmid, Lothar M260660 #7045.14
36 Lein, Anatoly260454 #6942.26
37 Kuzmin, Gennady P260253 #7027.45
38 Taimanov, Mark E260151 #6947.40
39 Browne, Walter S260150 #6924.47
40 Panno, Oscar R260050 #7038.29
41 Averbakh, Yury L259960 #7651.39
42 Kholmov, Ratmir D259651 #7348.13
43 Vaganian, Rafael A259551 #7421.71
44 Sanguinetti, Raúl C259563 #8040.41
45 Szabó, László259349 #7456.28
46 Gufeld, Eduard E259252 #7737.28
47 Reshevsky, Samuel H258752 #8061.59
48 Unzicker, Wolfgang258454 #8448.01
49 Benko, Pal C258350 #8344.95
50 Dzindzichashvili, Roman Y258255 #8729.15
51 Gheorghiu, Florin258248 #8329.23
52 Andersson, Ulf258147 #8322.01
53 Nezhmetdinov, Rashid G258074 #9960.54
54 Liberzon, Vladimir M258060 #9136.27
55 Tseshkovsky, Vitaly V257957 #9128.76
56 Pachmann, Ludek257761 #9449.13
57 Ivkov, Borislav257447 #8939.63
58 Najdorf, Miguel257251 #9363.21
59 Klovans, Janis257059 #9938.22
60 Planinc, Albin256850 #9529.20
61 Evans, Larry M256656 #10041.27
62 Darga, Klaus V256356 #10339.35
63 Matulovic, Milan256150 #10138.05
64 Razuvaev, Yury S256153 #10227.72
65 Ribli, Zoltán256049 #10121.81
66 Podgaets, Mikhail Y256056 #10625.93
67 Nei, Iivo255660 #11141.66
68 Mukhin, Mikhail A255654 #10825.36
69 Csom, István255649 #10533.08
70 Gurgenidze, Bukhuti I255563 #11539.63
71 Parma, Bruno255449 #10731.50
72 Bagirov, Vladimir K255355 #11136.87
73 Lombardy, William J255359 #11435.57
74 Velimirovic, Dragoljub254851 #11431.13
75 Pfleger, Helmut254453 #11829.89
76 Kapengut, Albert Z254355 #12028.98
77 Hecht, Hans-Joachim254049 #11934.42
78 Ciric, Dragoljub M253864 #12937.63
79 Matanovic, Aleksandar253751 #12343.10
80 Kupreichik, Viktor D253665 #13223.98
81 Beliavsky, Alexander G253660 #12919.54
82 Adorján, András253549 #12323.25
83 Commons, Kim S253565 #13321.93
84 Murey, Yakov253570 #13631.90
85 Grigorian, Karen A253459 #13125.81
86 Karasev, Vladimir I253461 #13135.04
87 Filip, Miroslav253453 #12744.67
88 Gulko, Boris F253373 #13926.39
89 Romanishin, Oleg M253363 #13421.47
90 Zhidkov, Valery S253262 #13433.82
91 Platonov, Igor V253157 #13239.45
92 Díez del Corral, Jesús253054 #13040.23
93 Dementiev, Oleg I252973 #14335.49
94 Zaitsev, Igor A252862 #13735.09
95 Radulov, Ivan252649 #13234.48
96 Lutikov, Anatoly S252657 #13640.40
97 Antoshin, Vladimir S252355 #13744.13
98 Bilek, István252349 #13440.88
99 Donner, Johannes H252348 #13445.98
100 Osnos, Viacheslav V252260 #14137.93
101 Addison, William G252068 39.59
102 Kurajica, Bojan252053 25.62
103 Kovacevic, Vladimir251759 31.26
104 Hartston, William R251752 25.88
105 Quinteros, Miguel A251749 25.51
106 Karner, Hillar251559 37.92
107 Tarjan, James E251464 21.36
108 Shamkovich, Leonid A251455 50.08
109 Marovic, Dražen251252 35.46
110 Kraidman, Yair251255 40.66
111 Nikolaevsky, Yuri V251265
112 Palatnik, Semen A251161 23.26
113 Suttles, Duncan251154 27.52
114 Timman, Jan H250748 21.54
115 Bobotsov, Milko G250752 41.75
116 Jansa, Vlastimil250649 30.59
117 Rogoff, Kenneth S250364 20.27
118 Bukic, Enver250156 35.58
119 Forintos, Gyözö V249950 37.91
120 Sosonko, Gennadi249856 30.12
121 Padevsky, Nikola B249754 40.09
122 Malich, Burkhard G249651 36.59
123 O'Kelly de Galway, Albéric249659 62.12
124 De Fotis, Gregory249468 21.56
125 Schmidt, Wlodzimierz249451 30.22
126 Minic, Dragoljub249452 36.32
127 Keene, Raymond249150
128 Karaklajic, Nikola249060 47.35
129 Teschner, Rudolf248969 51.37
130 Ciocaltea, Victor248749 41.45
131 Tseitlin, Mark D248760 29.77
132 Zilberstein, Valery I248556 30.21
133 Rashkovsky, Nukhim N248459 27.20
134 Soltis, Andrew E248462 26.09
135 Barczay, Laszlo248358 37.36
136 Maric, Rudolf248271 46.13
137 Dueball, Juergen248154 28.25
138 Schweber, Samuel248155 36.95
139 Antunac, Goran248163 28.20
140 Tringov, Georgy P248052 36.31
141 Lengyel, Levente247950 40.05
142 Zuckerman, Bernard247758 30.25
143 Sigurjónsson, Gudmundur247760 25.76
144 Kaplan, Julio P247654 22.92
145 Hamann, Svend247655 32.73
146 Georgadze, Tamaz V247660 25.64
147 Mikenas, Vladas247570 63.20
148 Ghitescu, Theodor247552 39.43
149 Sax, Gyula247450 22.03
150 Shereshevsky, Mikhail I247476 23.19
151 Barcza, Gedeon247457 61.85
152 Rodriguez, Ruben247370 26.56
153 Buljovcic, Ivan247367 36.51
154 Enklaar, Bertus F247251
155 Espig, Lutz247253 24.48
156 Byrne, Donald247061 43.05
157 Pomar Salamanca, Arturo247050 41.83
158 Dely, Peter247056 38.98
159 Nemet, Ivan247068 30.21
160 Ree, Hans246948 28.79
161 Popov, Luben246954 37.42
162 Tatai, Stefano246849 35.27
163 Pilnik, Herman246855 59.48
164 Gerusel, Mathias246754 35.40
165 Stean, Michael F246755 19.82
166 Yanofsky, Daniel A246759 48.26
167 Estrin, Yacov B246761 50.19
168 Spiridonov, Nikola246556 35.34
169 Pribyl, Josef246551 25.72
170 Sveshnikov, Evgeny E246567 23.38
171 Minev, Nikolay N246557 42.48
172 Ubilava, Elizbar E246474 22.84
173 Radev, Nikolai246474 34.53
174 Balshan, Amikam246468
175 Damjanovic, Mato246351 46.27
176 Amos, Bruce M246367 26.50
177 Anikaev, Yury246269 25.00
178 Rossetto, Héctor D246253 50.81
179 Alburt, Lev O246165 27.85
180 Calvo Minguez, Ricardo245953 29.69
181 Rytov, Boris245762
182 Rukavina, Josip245752 30.59
183 Doroshkievich, Vladimir K245662 35.51
184 Kuijpers, Franciscus Antonius245662
185 Robatsch, Karl245556 44.71
186 Schauwecker, Meinrad245568 22.28
187 Johannessen, Svein245561 35.70
188 Jansson, Borje245456 31.30
189 Bogdanovic, Rajko245464 41.62
190 Zuidema, Coenraad245353
191 Biyiasas, Peter245355 22.61
192 Bertok, Mario245366 43.83
193 Smederevac, Petar245274 50.84
194 Torre, Eugenio245251 21.65
195 Penrose, Jonathan245259 39.73
196 Messing, Hrvoje245264 32.92
197 Vranesic, Zvonko245163 34.74
198 Sofrevski, Jovan245059 37.86
199 Ghizdavu, Dumitru244956 24.11
200 Torán Albero, Román244961 41.73
201 Hug, Werner244850 20.80
202 Cvetkovic, Srdjan244866 27.34
203 Faragó, Iván244757 27.24
204 Cosulich, Roberto244660
205 Liebert, Heinz244653 37.10
206 Botterill, George Steven244661
207 Capelan, Guenter244561 40.92
208 Hennings, Artur244552 32.96
209 Mišta, Ladislav244568 29.66
210 Basagic, Zlatko244473 25.53
211 Stanciu, Traian244372 37.79
212 Moiseev, Oleg L244376 48.15
213 Nikolic, Stanimir244274 38.43
214 Garcia, Raimundo244152 37.09
215 Knezevic, Milorad244060 36.66
216 Lehmann, Heinz Dr244059
217 Weinstein, Norman243972 22.74
218 Mednis, Edmar J243860 36.27
219 Cortlever, Nicolaas243864 58.04
220 Rakic, Tomislav243775 38.63
221 Makarichev, Sergey Y243660 19.62
222 Kuindzhi, Alexander243661
223 Westerinen, Heikki MJ243649 29.17
224 Suess, Alois243662 30.05
225 Saidy, Anthony F243451 36.12
226 Williams, Arthur Howard243359
227 Plachetka, Jan243254 28.37
228 Haygarth, Michael J243275
229 Hase, Juan Carlos243156
230 Rossolimo, Nicolas243164 63.34
231 Mariotti, Sergio243158 26.88
232 Cuasnicu, Oscar243060 30.68
233 Ojanen, Kaarle Sakari243075
234 Dueckstein, Andreas243066 45.90
235 Vooremaa, Andres243072 28.94
236 Bisguier, Arthur B242953 43.73
237 Vukic, Milan242957 29.86
238 Christoph, Manfred242865 42.09
239 Langeweg, Kick242750 36.31
240 Kirov Ivanov, Nino242766 27.81
241 Bednarski, Jacek B242750 34.30
242 Kozma, Julius242763 44.08
243 Sahovic, Dragutin242670 32.89
244 Peretz, Malkiel242660 30.06
245 Kestler, Hans-Günter242557 33.55
246 Haag, Ervin242560 40.47
247 Honfi, Karoly242554 42.68
248 Estevez Morales, Guillermo242455
249 Krnic, Zdenko242463 25.74
250 Zwaig, Arne242464
251 Moe, Mogens242373 29.30
252 Sliwa, Bogdan242372 51.40
253 Jakobsen, Ole242254 30.70
254 Ostojic, Predrag242254 35.36
255 Ermenkov, Evgenij242156 23.75
256 Schiffer, Karl Josef242069
257 Janoševic, Dragoljub242052 49.97
258 Nowak, Erwin241973
259 Pedersen, Karl241969 32.76
260 Drimer, Dolfi241971 38.70
261 Rodriguez Vargas, Orestes241854 29.98
262 Szmetan, Jorge241856 23.09
263 Foguelman, Alberto241768 49.71
264 Ungureanu, Emil241758 36.66
265 Řgaard, Leif241458 21.48
266 Flesch, Janos241469 39.75
267 Brinck Claussen, Bjorn241371
268 Kolarov, Atanas S241167 39.33
269 Kosanski, Stanko241173 31.70
270 Spassov, Liuben241064 30.27
271 Hernandez, Roman240966 23.60
272 Clarke, Peter H240966
273 Ek, Hans240964 44.73
274 Portisch, Ferenc240862 34.22
275 Campos Lopez, Mario240858 30.12
276 Myagmarsuren, Lhamsuren240856 35.37
277 Scholl, Eddie C240854 28.70
278 Tompa, Janos240769 26.17
279 Jiménez Zerquera, Eleazar240762 45.01
280 Cuéllar Gacharná, Miguel240656 56.62
281 Debarnot, Roberto240655 25.89
282 Korensky, Valeri S240563
283 Cobo Arteaga, Eldis240554
284 Doda, Zbigniew240452 42.36
285 Ujtumen, Tudev240457 33.84
286 Nicevski, Risto240458 28.01
287 Toth, Bela240358 30.20
288 Gaprindashvili, Nona240263 32.16
289 Soos, Bela240264 43.31
290 Eising, Johannes240159 38.08
291 Pytel, Krzysztof240051 28.12
292 Gilden, Lawrence C240069
293 Bohosjan, Sarkis240060 32.26
294 Chellstorp, Craig V240065
295 Porat, Yosef239864 64.06
296 Liljedahl, Lennart239856 25.84
297 van Scheltinga, Tjeerd D239857 59.31
298 Ornstein, Axel239760 21.18
299 Siaperas, Triantafyllos239662 40.91
300 Geller, Uzi239669 42.42
301 Ilievski, Dimitar239668 31.84
302 Martz, William E239655
303 Markland, Peter R239453 22.21
304 Cuartas, Carlos239460 32.87
305 Friedman, Shmuel239463
306 Lechtynsky, Jiri239358 25.60
307 Rubinetti, Jorge A239252 28.25
308 Hartoch, Robert G239150
309 Kinnmark, Ove239163 28.52
310 Kupka, Slavoj238965 30.97
311 Boey, Josef238965 39.12
312 Vujacic, Borivoje238967 23.80
313 Ivanovic, Božidar238963 26.84
314 Littlewood, John Eric238869
315 Belmonte, Juan S238771
316 Barle, Janez238762 21.27
317 Rajkovic, Dusan238757 31.04
318 Andersen, Borge238772 39.28
319 Rocha, Antonio238773 29.05
320 Kostro, Jerzy238652 36.43
321 Mestrovic, Zvonimir238670 28.70
322 Filipowicz, Andrzej238655 35.13
323 Adamski, Jan238553 29.63
324 Blau, Max238473 54.53
325 Karklins, Andrew238463 26.21
326 Bhend, Edwin238267 41.81
327 Czerniak, Moshe238157 63.41
328 Bukal, Vladimir Sr238063 33.66
329 Pedersen, Eigil238064
330 Vogt, Lothar H238053 21.45
331 Muco, Fatos237969 24.20
332 Pritchett, Craig William237861
333 Zinn, Lothar237759 35.28
334 Lundin, Erik237671 68.99
335 Kristiansen, Erling237660 36.54
336 Peev, Peicho Chonev237556 33.24
337 Sydor, Andrzej237456 36.49
338 Betancort Curbelo, Juan237371 30.87
339 Mititelu, Gheorghe237367 38.67
340 Fichtl, Jirí237359 52.37
341 Olsson, Ake237361 39.16
342 Vadasz, Laszlo237259 25.42
343 Jankovec, Ivan237271 34.70
344 Basman, Michael J237274 27.29
345 Corden, Martyn J237268
346 Pelikán, Jorge237160 67.19
347 Naranja, Renato237158 32.77
348 Masic, Ljubomir237157 36.98
349 Wade, Robert Graham237054
350 Belkadi, Ridha237066 48.18
351 Kagan, Shimon237055 31.23
352 Deze, Anton237059
353 Trapl, Jindrich236966 31.27
354 Kovacs, Laszlo M236963 34.73
355 Kaldor, Avraham236960 26.11
356 Knaak, Rainer F236855 20.29
357 Roehrl, Karl236865 32.47
358 Balcerowski, Witold236763 37.88
359 Bellin, Robert236757 20.99
360 Pavlov, Mircea236667 35.79
361 Wright, Daniel236672
362 Piasetski, Leon David236675
363 Poulsson, Eivind236569 30.57
364 Wirthensohn, Heinz236559 22.15
365 Mueller, Klaus Uwe236465
366 Polgar, Istvan236361 28.59
367 Eley, Brian236356
368 Brostrom, Goran236369 31.17
369 Sloth, Jorn236263 28.82
370 German, Eugenio Maciel236269
371 Partos, Charles236262 36.88
372 Hohler, Peter236263 32.21
373 Shaw, Terrey Ian236170
374 Puc, Stojan236161 52.22
375 Kluger, Guyla236169 59.46
376 Hlousek, Zdenek236072
377 Akvist, Hakan235962 31.67
378 Schoeneberg, Manfred235957 26.98
379 Holaszek, Hans235975
380 Baumbach, Friedrich235861 37.81
381 Maciejewski, Andrzej235867 21.97
382 Nagy, Ervin235862 27.91
383 Uddenfeldt, Dan235765 22.25
384 Van Riemsdijk, Herman C235759 24.84
385 Garcia Martinez, Silvino235752 28.98
386 Emma, Jaime J235657 35.45
387 Shabanov, Yury F235674 35.63
388 Hazai, Laszlo235665 20.04
389 Jacobsen, Bo235665 24.55
390 Kunsztowicz, Uwe235657 29.45
391 Kanko, Ilkka235475 38.61
392 Webb, Simon235463 24.05
393 Whiteley, Andrew J235363 26.06
394 De Greif, Boris235367 43.38
395 Denker, Arnold S235365 59.36
396 Gasiorowski, Ryszard235369 37.55
397 Harandi, Khosro235263 22.83
398 Bachtiar, Arovah235267 39.26
399 Pustina, Ylvi235163
400 Levy, Louis235171 52.39
401 Brond, Victor235170
402 Witkowski, Stefan234973 41.76
403 Saren, Ilkka J234862 33.12
404 Bellon Lopez, Juan Manuel234853 23.14
405 Pietrusiak, Bogdan234862 39.95
406 Holm, Sejer234756 33.88
407 Gasic, Bozidar234668 35.72
408 Quinones, Oscar Carillo234662
409 Levy, David Neil Lawrence234660
410 Mestel, A Jonathan234659 16.30
411 Fuller, Maxwell L234369 28.42
412 Kupper, Josef234374 41.30
413 Jongsma, Alexander234264 35.08
414 Serwinski, Benedykt234272
415 Moehring, Guenther234162 36.60
416 Medina García, Antonio A234051 53.74
417 Romm, Meir233964 34.02
418 Kushnir, Alla233961
419 Tan Lian Ann233859
420 Krabbe, Tim233770 30.21
421 Szilágyi, György233762 51.98
422 Kaufman, Larry C233567 25.62
423 Palermo, Vicente233464 41.30
424 Van Baarle, C John233461 28.20
425 Reicher, Emanoil233464 43.26
426 Visier Segovia, Fernando233359 30.41
427 Cafferty, Bernard233260 39.01
428 Vila Dupla, Aurelio233268 14.18
429 Cibulka, Vladimir233062 31.66
430 Carvalho, Herbert Abreu232965 18.75
431 Troianescu, Octav232965 57.40
432 Banas, Jan232856 26.07
433 Mikhalchishin, Adrian B232876 18.62
434 Van Geet, Dirk Daniel232863 41.33
435 Domnitz, Zadok232663 39.71
436 Camara, Helder232557 36.40
437 Garcia, Horacio232471
438 Grabczewski, Romuald232361 41.40
439 Zoltek, Tadeusz232367 35.83
440 Sznapik, Aleksander232253 22.39
441 Sumiacher, Carlos232168
442 Poch, Cesar Guillermo232161
443 Cardoso, Radolfo Tan232154
444 Friedgood, David232172 26.96
445 Rebizzo, Cayetano232069 64.89
446 Kristinsson, Jon231958 31.04
447 Franzen, Jozef231867 27.40
448 Bronstein, Luis231863 27.08
449 Gereben, Ernö231759 66.03
450 Manasterski, Lutoslaw231761 36.39
451 Skalkotas, Nikolaos231764 23.77
452 Janetschek, Karl231766 33.20
453 Miles, Anthony J231771 18.19
454 Cornelis, Frans B231671 31.48
455 Perkins, Alan H231475 24.28
456 Schaufelberger, Heinz231459 25.61
457 Moles, John231365 23.77
458 Zichichi, Alvise231261 34.98
459 Van den Berg, AMJ.231266
460 Hoen, Ragnar231164 32.73
461 Silva, Fernando231164 22.90
462 Sarapu, Ortvin231065 49.44
463 Estimo, Samuel230873
464 Van Seters, Frits230866
465 Juarez, Carlos Eleodoro230661 35.00
466 Casas, Fernando230561 46.85
467 Lombard, Andre230554 22.78
468 Gasztonyi, Endre230465
469 Nordstrom, Felix230372 29.07
470 Wagman, Stuart230368 54.13
471 Boersma, Paulus A230365 24.95
472 Garcia, H.230369
473 Franklin, Michael J230267 42.41
474 Pinto Paiva, Jose230175
475 Wotulo, Max230162 40.89
476 Menvielle Lacourrelle, Augusto230066 34.88
477 Nowak, Ignacy230073 24.47
478 Rodriguez Cordoba, Jesus R230067 24.04
479 Agdamus, Jose Luis229770
480 Ghinda, Mihail Viorel229773 23.92
481 Ujtelky, Maximilián229765 58.19
482 Toth, Peter229574 32.81
483 Borngaesser, Rene229473 21.77
484 Wibe, Terje229359 25.73
485 Meduna, Eduard229376 22.80
486 Leskovar, Mario229363 22.72
487 Ardiansyah, Haji229256 21.57
488 Eperjesi, Laszlo229065 30.12
489 Durao, Joaquim228862 42.68
490 Fappas, Joannis228876
491 Behling, Robert228876 25.99
492 Littleton, Michael Flannan228774
493 Chemin, Vitorio228774 23.14
494 Osterman, Rudolf228762 26.94
495 Novak, Ivan228660 30.43
496 Nobrega, Adaucto da228571
497 Belliard, Luis228465
498 Wostin, Rik Hendrik228275
499 Taha, A.228071
500 Watzka, Horst228071 34.80

These ratings, calculated as of June 30, 1973, incorporate all games (against rated opponents) played in the time between July 1, 1972 and June 30, 1973, along with the ratings that were already calculated as of June 30, 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 June 30, 1973. This represents the player's estimated strength on July 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 July 1, 1973. The +/- value represents the standard deviation of that estimate; the player's true strength on July 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 July 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 June 30, 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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