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Nimzo-Indian, 4.e3, Main line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 d5 6. Bd3 c5 7. 0-0 Nc6 8. a3 Bxc3+ 9. bxc3 dxc4

In each game under Location you see masterchessopen.com but it's not a valid website, so please don't use it. Claus Gamborg, Jan. 2023

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#WhiteRatingBlackRatingResultMovesECOTournamentDate
13Kotov Alexander A...2500Matanovic Aleksan...24901-041 ≣E41Izt
721Kostov Galin (BUL)2197Pantev Veselin (BUL)23730-145 ≣E47Ch Bulgaria (team...05 Jun 2011
472Kostin Sergei (RUS)2290Tunik Gennady (RUS)24500-147 ≣E41Cup Russia (open)
242Koski PekkaHeikkinen Jyrki0-125 ≣E47?
231Koski PekkaRantanen Veikko1-023 ≣E41?
510Korotylev Alexey ...2528Paramonov Dimitri...23321-032 ≣E47Memorial M.Chigor...
584Korotylev Alexey ...2604Negi Parimarjan (...23521-039 ≣E47It (cat.7)23 Jan 2005
661Korobov Anton (UKR)2605Wang Hao (CHN)26960-135 ≣E47World Mindsports ...04 Oct 2008
749Korobov Anton (UKR)2679Swiercz Dariusz (...25651-045 ≣E47Match \29 May 2012
413Komljenovic Luka ...2228Niedermaier Hans ...22690-140 ≣E47Bundesliga (2nd) ...
172Kolarov Atanas S ...2415Sapunov Lilko1-028 ≣E41Ch Bulgaria01 Mar 1966
636Koelbl Wolfgang (...1912Schulte Torsten (...22310-130 ≣E47It (open)02 Aug 2007
499Kodentsov Grisja ...2275Werle Jan (NED)22161-040 ≣E20Ch Netherlands (j...
458Kock Hans-Uwe (LIE)2235Kiesslich W1-029E10It (open)
325Knaak Rainer (GER)2505Horvath Jozsef M ...21041-030 ≣E47It (cat.12)
216Knaak Rainer (GER)2515Garcia Gonzales G...24501-042 ≣E41Memorial J.Capabl...
238Knaak Rainer (GER)2520Timoscenko Gennad...24830-134 ≣E47?
425Knaak Rainer (GER)2540Korchnoi Viktor (...26351-023 ≣E47Cup Hofmann
324Knaak Rainer (GER)2505Georgiev Kiril (MKD)25351-038 ≣E47Match \
286Knaak Rainer (GER)2505Tischbierek Raj (...24541-042 ≣E41It
288Knaak Rainer (GER)2490Prandstetter Edua...24401-027 ≣E47Ch Czechoslovakia...
83Kluger Gyula (HUN)2250Ivkov Borislav (SRB)24160-130 ≣E47Match \
15Kluger Gyula (HUN)2250Florian Tibor (HUN)1-038 ≣E41Ch Hungary
179Klompus GrigoryRoskov V1-037 ≣E47corr.
390Kjeldsen Jens (DEN)2365Tolnai Tibor (HUN)24950-131 ≣E47It (open)
551Khurtsidze Nino (...2433Balashov Yuri S (...25211-033 ≣A40It (open) \
471Khasin Abram (RUS)2420Leonidov Vitaly (...23650-142 ≣E41It (seniors)
751Kharitonov Alexan...2547Biriukov Nikolai ...24201-032 ≣E47It (open)18 Jun 2012
209Ketzscher Roland ...2085Jordan Garcia Jos...1-032 ≣E47corr.
248KeneszDuenhaupt HW (GER)1-040 ≣E41Ch Europe (team) ...
282Kell KlausSelke Horst1-024 ≣A40corr.
522Kekki Petri (FIN)2300Sorsa Nuutti (FIN)22771-046 ≣E47Ch Finland
263Keene Raymond D (...2455Romanishin Oleg M...25600-140 ≣E41?
494Kay JBStracy D (NZL)1-033 ≣E41Ch North Island (b)
182Kausek KBubenik J1-037 ≣E47?
297Kausek KZlebcik L1-037 ≣E41Ch Czechoslovakia...
690Kashlinskaya Alin...2358Girya Olga (RUS)24141-050 ≣E41Ch Russia (junior...18 Apr 2010
634Kashlinskaya Alin...2263Ogleznev Alexandr...22621-041 ≣E47It \22 Jul 2007
442Karp Serge (LUX)2095Pytel Krzysztof (...24250-122 ≣E10It (open)
196Karjarinta TapaniNurmi Toivo0-128 ≣E41?
467Karayannis Athana...2245Nikolaidis Ioanni...25200-143 ≣E41It (open)
697Kapnisis Spyridon...2511Pavlidou Ekaterin...21911-041 ≣E47Cup Artemis (open)14 Jul 2010
508Kantsler Boris (ISR)2524Gershon Alik (ISR)25021-030 ≣E47Ch Israel (team)
640Kanakaris G (GRE)2236Bakos Balazs (HUN)24010-133 ≣E47Ch World (juniors...28 Nov 2007
734Kamel Salama (EGY)2037Elhares Alaa17411-029 ≣E47Tournament (Elo) \15 Oct 2011
570Kaidanov Gregory ...2611Lerner Konstantin...25041-039 ≣E47It (open) \
303Kahn Manfred (GER)2139Staller Peter (GER)22441-043 ≣A40It
281KahlGuenther1-045 ≣E47corr.
249Kaarlonen KaarloMettinen Timo1-031 ≣E47?
234Just Joachim (GER)2047Potthammel Joerg ...21300-140 ≣A17Ch DDR (corr.)
419Jussupow Artur (GER)2655Beliavsky Alexand...26400-139 ≣E47It
530Jussupow Artur (GER)2633Solomunovic Igor ...24211-037 ≣E47It (open)
245Juhnke Karl (GER)2178Ruehrig Volkhard ...0-137 ≣E47Ch Germany (team)...
477Juhnke Karl (GER)2290Wronn Bernd (GER)21921-048 ≣E47Oberliga Northwes...
580Jovic Stevan (SRB)2080Ilincic Zlatko (SRB)25220-125 ≣E47Ch Vojvodina (team)26 Sep 2004
39Jorgensen Vagn RauheSpassky Boris V (...25480-133 ≣E41Ch World (juniors...
368Jolowicz Matias D...2243Wronn Bernd (GER)21920-124 ≣E47Regionalliga Nort...
90Johannsson Ingi R...2410Anderson Frank R ...0-127 ≣A17Olympiad
91Johannsson Ingi R...2410Safvat Y1-038 ≣A15Olympiad
536Johannessen Leif ...2527Moussa Alaa-Eddin...22121-045 ≣E47Olympiad
542Johannessen Leif ...2527Jenni Florian (SUI)25161-029 ≣A15Bundesliga 2002/03
555Johannessen Leif ...2527Moen Andreas (NOR)22650-134 ≣A15It (cat.6)
356JerabekKubis0-135 ≣E47Ch Czechoslovakia...
146Jenik JHannemann H0-119 ≣E41Europe Tournament...
344Jedrzejowski Maci...2064Hanusek G1-037 ≣E47?
556Jasny Stanislav (...1858Machycek Lubomir ...22711-034 ≣E47It (open)
387Janssen Ger (NED)2228Bellin Robert (ENG)23850-136 ≣E47It (open)
327Jandke Manfred (GER)2163Wicklund Hansen G...1-040 ≣E47Europe Tournament...
563Jakab Attila (HUN)2402Berczes Csaba (HUN)24191-039 ≣E47It (cat.2)
616Jakab Attila (HUN)2402Ilincic Zlatko (SRB)24510-130 ≣E40It (cat.7)07 Jun 2006
760Jacso Adam (HUN)2224Kozma Gabor19591-040 ≣E41It (open)19 Aug 2012
110Ivkov Borislav (SRB)2416Wexler Bernardo (...1-040 ≣E41?
101Ivanov P (BUL)Filipov F (BUL)1-040 ≣E47Ch Bulgaria
243Ivanov Igor V (CAN)2424Popov Nikolay (MDA)24100-140 ≣E41Tournament
433Ivanchuk Vassily ...2740Tiviakov Sergei (...26551-036 ≣E47It (cat.17)
197Ivanchenko Sergey...2054Rovner Dmitry (RUS)0-138 ≣E41?
753Ivana Maria Furtado2065Jargalmaa Sarantuya17731-034 ≣D02Ch Asia (juniors)...27 Jun 2012
386Israel Jens (GER)2193Fritze Bernd (GER)22350-124 ≣A40Oberliga Northwes...
429Iskusnyh Sergei (...2430Balashov Yuri S (...24900-147 ≣E47Ch Russia
452Iskusnyh Sergei (...2460Skvortsov A (RUS)23370-137 ≣E47Ch Russia (1/2 fi...
611Iotov Valentin (BUL)2503Petkov Vladimir (...24431-031 ≣E47Ch Bulgaria
632Iotov Valentin (BUL)2509Kuzubov Yuriy (UKR)25821-045 ≣E41It \07 Jun 2007
587Iljushin Alexei (...2546Wang Hao (CHN)25190-144 ≣E47It (open) \20 Feb 2005
44Idigoras GregorioSanguinetti J0-145 ≣E41Ch Argentina
16Idigoras GregorioMarini Luis0-143 ≣E41Ch Argentina
43Idigoras GregorioNajdorf Miguel (POL)24450-139 ≣E41Ch Argentina
131Hybl Jaroslav (CZE)2172Blatny Frantisek ...21120-133 ≣E47Ch Czechoslovakia
474Huss Rolf (GER)2163Schild Christoph ...22880-132 ≣A40It (open)
439Hultin Per (SWE)2102Plato Bo (SWE)20800-130 ≣E47Ch Sweden (team)
272Hovde Frank (NOR)2285Henttinen Markku ...22700-136 ≣E46It (open)
398Hoszowski PiotrNowak Z1-037 ≣E47Ch Poland (corr.)
422HolstLundin Alexandr (...23030-125 ≣E47Ch Sweden (team)
285Hoi Carsten (DEN)2390Norgaard Jesper (...24081-034 ≣E47Tournament
312Hoi Carsten (DEN)2420Kormanyos Zoltan ...23141-034 ≣E41It (open)
192Hofmann GeorgeSchmid Hans-Peter...18990-142 ≣E41corr.
320Hoffmann Hans (GER)2120Garscha F0-125 ≣E46corr.
631Hoang Thi Bao Tra...2265Andriasian Siranu...22341-044 ≣E21Ch World (team) (w)21 May 2007
392Hlavnicka Jiri (CZE)2243Prandstetter Edua...24100-129 ≣E47Ch Czech Chess Union
335Hinchey CBenjamin Joel (USA)25600-132 ≣E47It (open)
630Hesselbarth Karlh...1878Bauer Norbert (GER)21180-133 ≣E47It (open) \16 May 2007