New and updated
** Players and events that are newly added since the previous update
* Players and events whose information or references have been revised since the previous update

Update notes  

Players

** Adeler, E.  
 * Alekhine, A.A.  
 * Alekhine, A.A. (2)  
 * Alexander, F.F.L.  
** Anaya Oger, C.  
 * Anaya Oger, H.  
** Anufriev  
 * Apsenieks, F.  
 * Asztalos, L.  
 * Atkins, H.E.  
 * Atkinson, Wa.  
 * Aurbach, A.  
 * Bakonyi, E.  
 * Bakos, J.  
** Bakunin  
 * Balla, Z.  
 * Ballek, E.C.  
** Ballodit, S.F.  
 * Baranov, K.K.  
 * Barasz, Z.  
** Baratz, A.  
** Barron, T.S.  
** Barth, E.  
 * Barthe, V.  
 * Barzin, M.  
 * Becker, A.  
 * Bee, J.M.  
 * Beihoff, G.J.  
** Belin, E.S.  
** Birnberg, J.  
 * Blake, J.H.  
** Blass, A.  
 * Blumenfeld, B.M.  
 * Blumich, R.M.  
** Bogdanov  
 * Bogoljubow, E.D.  
 * Bohatirchuk, F.P.  
 * Bolland, P.D.  
 * Botvinnik, M.M.  
 * Brinckmann, A.  
** Brodsky, B.I.  
** Buerger, Vi.  
 * Busvine, E.  
 * Calvert, E.T.  
 * Capablanca, J.R.  
 * Carls, C.J.M.  
 * Censer, I.  
 * Chalupetzky, F.  
 * Chebishev-Dmitriev, A.A.  
** Chekhovich  
 * Cheron, A.  
 * Chilton, H.J.  
 * Chodera, M.  
 * Colle, E.  
** Costigan, G.  
 * Coultas, W.F.J.  
 * Crakanthorp, L.S.  
 * Crakanthorp, S.  
 * Crane, H.V.  
 * Crepeaux, R.  
** da Cunha, E.G.  
 * Davidson, Jac.  
 * Dewing, L.C.G.  
** Dietrich, A.  
 * Dobias, J.  
** Dofopischev  
 * Drewitt, J.A.J.  
 * Duchamp, M.  
 * Duhrssen, R.  
 * Dunkelblum, A.  
 * Dus-Chotimirsky, F.I.  
 * Elstner, R.  
 * Engel, H.  
 * Eppens, J.C.  
 * Erskine, J.A.  
 * Euwe, M.  
 * Ewbank, A.M.  
 * Exner, G.R.  
 * Factor, S.D.  
** Farkas  
** Fazekas, S.  
 * Fick, W.A.J.M.  
** Fodor, I.  
 * Foldessy, E.  
** Folga  
 * van Foreest, A.E.  
** Freidberg, M.Y.  
 * Freiman, S.N.  
 * de Freitas, J.P.  
** Frenkel, A.Z.  
 * Frey, T.  
 * Frink, O.  
** Frydman, P.  
** Gabarain, J.  
 * Gaevsky, A.N.  
 * Geiler, G.M.  
 * Genttner, J.  
 * Gibaud, A.  
 * Gilg, K.  
** Goerlich, R.S.  
 * Goetz, A.  
 * Goldstein, M.E.  
 * Golubev, I.P.  
 * Gooding, W.  
** Gordian, M.F.  
** Gorfinkel, A.M.  
 * Gothilf, S.B.  
 * von Gottschall, H.  
** Grammatikoff, J.  
 * Grant, H.E.  
 * Grau, R.G.  
 * Grigorenko, D.D.  
 * Grigoriev, N.D.  
 * Grob, H.  
 * Groos  
** Gross (1)  
 * Grossl, F.  
 * Gruber, S.  
 * Gruber, T.  
 * Grunfeld, E.F.  
 * Guetsky, A.G.  
 * Gundersen, G.  
 * Gurnhill, C.R.  
 * Gygli, F.  
 * Hago, M.D.  
 * Haida, A.K.  
 * Hajek, F.V.  
 * Harvey, J.B.  
 * Hasek, J.  
 * Havasi, K.  
 * Havlicek, F.  
 * Helling, K.  
 * Henneberger, M.  
 * Henneberger, W.  
 * von Hennig, H.  
 * Hercz, N.  
 * Herland, S.  
 * Holloway, Ms. E.M.  
 * Hopper, L.  
** Horak, F.  
** Horvath, L.  
 * Hromadka, K.  
 * Ibanez, E.  
** Iglitsky, A.M.  
 * Ilyin-Zhenevsky, A.F.  
 * Ivanov (1)  
** Ivanov (2)  
 * Jacobs, H.L.  
 * Jaffe, C.  
 * Jakab, A.  
 * Janowsky, D.M.  
 * Jesty, E.T.  
 * Johner, H.L.  
 * Johner, P.F.  
 * Jonas, W.H.  
 * Kagan, B.  
** Kagan, M.Y.  
 * Kahn, V.  
** Kalinin  
** Kaminer, S.M.  
 * Kannuluik, W.G.  
** Kaspersky, A.A.  
 * Katz, S.  
** Kellner, B.  
 * Kholodkevich, K.I.  
 * Kinman, J.A.  
 * Kleczynski, J. (1)  
 * Kleczynski, J. (2)  
** Kleczynski, J. (3)  
 * Kmoch, H.  
 * Koch, W.  
 * Kohn, S.  
 * te Kolste, J.W.  
 * Koltanowski, G.  
 * Konig, I.R.  
 * Korb, J.  
 * Koyalovich, B.M.  
** Kraemer, A.  
 * Kramer, A.  
** Kremer, L.  
 * Kretzschmar, W.  
 * Krivoss, B.  
 * Krofta, K.  
 * Kroone, G.H.  
 * Kruger, P.  
 * Kubanek, J.  
 * Kubbel, A.O.H.I.  
 * Kuhn, P.R.  
 * Kupchik, A.  
** Kutuzov, N.N.  
 * Kuzelka, J.  
 * Lancel, E.E.  
 * Lasker, B.  
 * Lasker, Em.  
** Lassanyi  
 * Lastovets, G.A.  
 * Lawrence, P.J.  
 * Lean, R.E.  
 * Lenglez, M.  
** Lesman, E.  
 * Levenfish, G.Y.  
 * Littlejohn, P.C.  
** Liutov, N.M.  
 * Loman, R.J.  
 * Lorch, C.H.  
 * Louis, A.  
 * Louviau, A.  
 * Lovas, G.  
 * Lowcki, M.L.  
 * Lynch, J.A.  
 * Macalister, J.  
 * Macdonald, E.E.  
 * MacDonnell, G.A.  
 * Mackenzie, A.J.  
** Maizelis, I.L.  
** Makarczyk, K.  
** Makhlin  
 * Margolis, A.C.  
 * Marin, V.  
 * Maroczy, G.  
 * Marshall, F.J.  
 * Matisons, H.  
** Maxfield, M.J.  
** Maximovic, E.  
** Melnitsky  
** Mendelssohn, I.  
 * Merkel, S.M.  
** Mersh  
 * Michel, W.  
 * Michell, R.P.  
 * Mieses, J.  
** Mikhnevich  
 * Mikulka, R.  
 * Model, A.Y.  
 * Monticelli, M.  
 * Moritz, B.  
 * Morrison, J.H.  
 * Moses, G.W.  
 * Muller, Ha.  
 * Muller, Osc.C.  
 * Muller, W.  
** Nadporozhsky, K.  
 * Naegeli, O.  
 * Nagy, G.  
 * Nebel, M.  
 * Nenarokov, V.I.  
 * Nilsson, O.  
 * Nimzowitsch, A.  
** Noel-Johnson, R.C.  
 * Nollmann, J.  
 * Norman, G.M.  
** Norwood, C.E.  
 * Novak, J.  
 * O'Hanlon, J.J.  
 * Olland, A.G.  
 * Opocensky, K.  
 * Ottensooser, O.  
 * Palau, L.A.  
 * Palitzsch, F.M.  
 * Palmer, M.  
** Palmi, A.H.  
 * Panchenko, N.A.  
 * Parry, J.E.  
** Parsons, H.  
 * Pavlov-Pianov, N.M.  
 * Peppmoller, H.  
** Perfiliev, A.S.  
 * Piacentini, J.M.  
 * Pokorny, A.  
 * Poliak, A.B.  
 * Portela, C.M.  
 * Post, A.M.E.  
 * Potemkin, P.P.  
 * Preiswerk, W.E.  
 * Price, H.E.  
 * Prokes, L.  
** Proskurin, N.V.  
 * Prucha, K.  
 * Przepiorka, D.  
** Pulcherio, C.  
 * Purdy, C.J.S.  
 * Rabinovich, A.I.  
 * Rabinovich, I.L.  
** Racz, L.  
 * Rathbone, A.  
** Ratner, E.  
 * Reca, D.M.  
** Reich, L.  
 * Rethy, P.  
 * Reti, R.  
 * Richter, K.  
 * Riemann, H.  
 * Rivas Costa, S.  
 * Rivier, W.  
** Rivlin, B.K.  
** Rokhlin, Y.G.  
** Romano, V.T.  
 * Romanovsky, P.A.  
 * Romi, M.  
 * Rosenkrantz, K.W.  
** Ross, L.D.  
 * Rosselli del Turco, S.  
** Rossels, E.M.  
 * Rubinstein, A.K.  
** Russo, D.I.  
** Rutherford, V.H.  
 * Sacconi, A.  
 * Samisch, F.  
 * Samuels, L.W.  
 * Sapira, E.J.  
 * Sarkozy, B.  
 * Saunders, H.  
 * Savage, L.P.  
** Schafer (2)  
 * Schapiro, M.A.  
 * Schara, A.  
 * Scherer, L.  
 * Schmitt, L.  
 * Schonmann, W.  
 * Schulz, J.  
** Schwartzburg, I.D.  
 * Scrivener, R.S.  
 * Seitz, J.A.  
 * Selezniev, A.S.  
 * Sergeant, E.G.  
 * Sergeant, P.W.  
 * Sergeev, A.S.  
 * Sery, S.  
 * Sharp, S.T.  
** Shneyvas  
 * Shories, G.F.W.  
** Short, F.C.  
** Sidorov, P.P.  
 * Sika, T.  
 * Skalicka, C.  
 * Smirnov, A.A.  
** Soloviev, K.K.  
 * Sorokin, N.T.  
 * Sournin, V.N.  
 * Sozin, V.I.  
 * Spencer, E.  
 * Spero, I.H.  
 * Spielmann, R.  
** Sprakhovich  
** Springe, W.  
 * Stanes, E.D.  
 * Staniforth, H.S.  
 * Stearns, E.E.  
 * Steiner, E.  
** Steiner, H.  
 * Steiner, L.  
 * Steneberg, F.  
 * Sterk, K.  
 * Stopinski, Z.A.  
 * Storr-Best, J.  
** Storr-Best, L.  
 * Stout, G.H.  
 * Straat, E.J.  
 * Szabo, D.  
 * Szekely, J.  
 * Szigeti, M.  
** Szvoboda, G.  
 * Tackels, A.  
 * Takacs, S.  
** Tamm  
 * Tarrasch, S.  
 * Tartakover, S.G.  
 * Taylor, Th. (1)  
 * Teller, A. (2)  
 * Tenner, O.  
 * Tereba, R.  
 * Terrill, F.H.  
** Teslenko, P.I.  
 * Thelen, B.  
 * Thomas, G.A.  
 * Torre, C.  
 * Toth, L.  
** Towbin, M.  
 * Travin, L.Y.  
 * Treybal, F.  
 * Treybal, K.  
** Trompowsky, O.F.  
** Tuhan-Baranowski, L.  
 * Turover, I.S.  
** Tylor, T.H.  
 * Tyroler, A.  
 * Uber, H.B.  
 * Vajda, A.  
** Veigert, A.A.  
** Venalein  
 * Verlinsky, B.M.  
 * Verschueren, E.  
** Viktorov, G.A.  
 * Villegas, B.H.  
 * Vilner, Y.S.  
 * Viner, W.S.  
 * Vitkovsky, A.  
 * Voellmy, E.  
 * Vukovic, V.  
** Wachter, P.  
 * Wagner, H. (1)  
 * Wahltuch, V.L.  
 * Wallace, A.E.N.  
 * Walter, M.  
 * Watts, W.H.  
** Wechsler, T.M.  
 * Weenink, H.G.M.  
 * Wegemund, O.  
 * Weinstein, S.O.  
 * Westphal, L.  
 * Whitaker, N.T.  
 * Wiarda, G.  
 * Widmeyer, W.  
 * Winter, Jo.  
 * Winter, W.  
 * Woinarski, S.H.Z.  
 * Wolf, S.R.  
** Wolfsohn  
 * Wright, G. (2)  
** Wright, H.G.  
** Yagdfeld, G.  
 * Yanushpolsky, I.L.  
 * Yates, F.D.  
 * Young, J.W. (1)  
 * Yurdanski, P.K.  
** Yuriev, B.B.  
** Yuriev, V.B.  
** Zabodroczky, E.  
 * Zander, O.  
 * Zidlicky, B.  
 * Zimmer, E.  
 * Zimmermann, O.  
** Zinovyev  
 * Znosko-Borovsky, E.A.  
 * Zubarev, N.M.  
** Zurmuhl  
 * Zverev, Y.P.  
Events

Matches
 
**  Balla, Z. - Steiner, E. 1925    Budapest
**  Brinckmann, A. - Schonmann, W. 1925    Kiel
**  Colle, E. - Koltanowski, G. 1925    Antwerp
**  Spielmann, R. - Nilsson, O. 1925    Goteborg
**  Ottensooser, O. - Springe, W. 1925    Munich
**  Schmitt, L. - Springe, W. 1925    Munich
**  Torre, C. - Kupchik, A. 1925    New York
**  Rokhlin, Y.G. - Ilyin-Zhenevsky, A.F. 1925    Russia (?)
**  Botvinnik, M.M. - Liutov, N.M. 1925    Leningrad
**  Botvinnik, M.M. - Rivlin, B.K. 1925    Leningrad
**  Sacconi, A. - Monticelli, M. 1925    Venice
**  Freiman, S.N. - Dus-Chotimirsky, F.I. 1925    Russia (?)
**  Reca, D.M. - Lynch, J.A. 1925    Buenos Aires
 
Tournaments
 
 *  Atlantic City 1921    8th American Chess Congress
**  Leningrad 1924 (4)    Leningrad - Category 2 and 3 Tournament
**  Hastings 1925 (1)    5th Hastings Christmans Tournament - Section 1
**  Hastings 1925 (2)    5th Hastings Christmans Tournament - Section 2
**  Hastings 1925 (3)    5th Hastings Christmans Tournament - Play-off
**  Hastings 1925 (4)    5th Hastings Christmans Tournament - Premier Reserves
**  Prague 1925 (1)    1st Kautský Memorial Tournament
**  Leningrad 1925 (1)    Leningrad Tournament
**  London 1925 (1)    London Chess League Tournament
**  Paris 1925 (1)    Paris Tournament
**  Prague 1925 (2)    2nd Prague Championship
**  Paris 1925 (2)    Palais Royale Winter Tournament
**  Bern 1925    Bern Tournament
**  Wiesbaden 1925    Wiesbaden Tournament
**  Bromley 1925 (1)    20th Kent County Chess Association Congress - Preliminary Section A
**  Bromley 1925 (2)    20th Kent County Chess Association Congress - Preliminary Section B
**  Bromley 1925 (3)    20th Kent County Chess Association Congress - Preliminary Section C
**  Bromley 1925 (4)    20th Kent County Chess Association Congress - Preliminary Section D
**  Bromley 1925 (5)    20th Kent County Chess Association Congress - Final Section
**  Berlin 1925 (1)    Berlin City Championship
**  Chemnitz 1925    13th Saxonian Chess Federation Congress
**  London 1925 (2)    London Tournament
**  Baden-Baden 1925    Baden-Baden Tournament
**  Vienna 1925    Austrian Chess Federation Tournament
**  Kharkov 1925    2nd Ukrainian Championship
**  Marienbad 1925    Marienbad Tournament
**  Sydney and Melbourne 1925    40th New South Wales - Victoria Telegraphic Match
**  Bucharest 1925    Bucharest Tournament
**  Zurich 1925    29th Swiss Chess Association Championship
**  Breslau 1925    24th German Chess Federation Congress - Master Tournament
**  Buenos Aires 1925    Buenos Aires Tournament
**  Debrecen 1925 (1)    Debrecen Master Tournament
**  Debrecen 1925 (2)    Debrecen Siegergruppe A
**  Bratislava 1925    9th Czech Chess Association Congress
**  Stratford-on-Avon 1925 (1)    18th British Chess Federation Congress - Championship
**  Stratford-on-Avon 1925 (2)    18th British Chess Federation Congress - Major Open Tournament
**  Salzuflen 1925    3rd Westphalian Chess Federation Congress
**  Cedar Point 1925    26th Western Chess Association Tournament
**  Kolin 1925    Kolin Tournament
**  Leningrad 1925 (2)    4th Soviet Union Championship
**  Gentbrugge 1925    5th Belgian Championship
**  Berlin 1925 (2)    Berlin Tournament
**  Montevideo 1925    2nd South American Championship
**  The Hague 1925    Belgium - Holland Team Match
**  Amsterdam 1925    Amsterdam Tournament
**  Moscow 1925 (1)    Moscow Tournament
**  Moscow 1925 (2)    1st Trade Unions Championship
**  Moscow 1925 (3)    Moscow Tournament
**  London 1925 (3)    35th City of London Club Championship
**  New York 1925    Manhattan Club Championship
**  Budapest 1925 (1)    Budapest Tournament
**  Budapest 1925 (2)    Budapest Tournament
**  Budapest 1925 (3)    Budapest Tournament
**  Gyor 1925 (1)    Gyor Tournament
**  Gyor 1925 (2)    Gyor Tournament
**  Leningrad 1925 (3)    Leningrad Tournament
**  Leningrad 1925 (4)    Leningrad Tournament
**  Leningrad 1925 (5)    4th Leningrad Championship
**  Leningrad 1925 (6)    Leningrad - Category 2a and 1b Tournament
**  Leningrad 1925 (7)    Leningrad - Category 1 Tournament
**  Moscow 1925 (4)    6th Moscow Championship
**  Odessa 1925    Odessa Tournament
**  Warsaw 1925    Warsaw Tournament