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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
76Dittmann SieghardOlafsson Fridrik ...24340-140 ≣E41Olympiad (student...
37Milic Borislav (YUG)Matanovic Aleksan...24900-140 ≣E41Match
44Idigoras GregorioSanguinetti J0-145 ≣E41Ch Argentina
199Baart JoanWeyerstrass Ronal...0-148E41Match
153Emma Jaime (ARG)2395Polo Gomez Vicent...22120-144 ≣E41Ch Buenos Aires (...
77SehlstedtBlatny Frantisek ...21120-141 ≣E41Olympiad (student...
559Golovchenko Gleb ...2260Vlasov Egor (RUS)22510-136 ≣E41Ch City (juniors)...
462Usachyi Vladimir ...2245Baklan Vladimir (...25700-130 ≣E41It (open)
243Ivanov Igor V (CAN)2424Popov Nikolay (MDA)24100-140 ≣E41Tournament
40Schweber Samuel (...2348Spassky Boris V (...25480-135 ≣E41Ch World (juniors...
7Vukovic Sava (YUG)Rabar Braslav (YUG)0-123 ≣E41Ch Yugoslavia
251Rodriguez Orestes...2485Olafsson Fridrik ...25300-126 ≣E41It (cat.10)
8Vukovic Sava (YUG)Rabar Braslav (YUG)0-123 ≣E41Ch Yugoslavia
472Kostin Sergei (RUS)2290Tunik Gennady (RUS)24500-147 ≣E41Cup Russia (open)
192Hofmann GeorgeSchmid Hans-Peter...18990-142 ≣E41corr.
23Geller Efim P (RUS)2455Kotov Alexander A...25000-142 ≣E41Tournament (candi...
196Karjarinta TapaniNurmi Toivo0-128 ≣E41?
29Rabar Braslav (YUG)Janosevic Dragolj...23300-147 ≣E41It
119Borja MEuwe Max (NED)0-134 ≣E41Olympiad
39Jorgensen Vagn RauheSpassky Boris V (...25480-133 ≣E41Ch World (juniors...
295Letic Stevan (SRB)2104Franzen Jozef (SVK)23020-140 ≣E41corr.
326Frieser Klaus (GER)2151Prizant Michael (...21360-138 ≣E41Europe Tournament...
43Idigoras GregorioNajdorf Miguel (POL)24450-139 ≣E41Ch Argentina
213Bergdahl AssarNordstrom Felix (...21810-140 ≣E41corr.
186Bronstein Luis (ARG)2349Schweber Samuel (...23480-138 ≣E41It
176Diez Del Corral J...2415O'kelly De Galway...24600-144 ≣E41It
45Furman Semen (RUS)2550Antoshin Vladimir...22500-146 ≣E41Ch URS
263Keene Raymond D (...2455Romanishin Oleg M...25600-140 ≣E41?
197Ivanchenko Sergey...2054Rovner Dmitry (RUS)0-138 ≣E41?
41Somers StafJorgensen Vagn Rauhe0-139 ≣E41Ch World (juniors...
81Yepez Olavo (ECU)2305Blatny Frantisek ...21120-123 ≣E41Ch World (team) (...
82Dzieciolowski AdamWiniwarter Felix ...21760-133 ≣E41Memorial Przepiorka
266Heiberg ThomasJohannessen Svein...22730-124 ≣E41Memorial Sigurd S...30 Aug 1979
275Mann VPiastowski Kurt (...19780-124 ≣E41Ch DDR (corr.)
200Cardoso Carlos Al...2207Sharif Mehrshad (...23300-141 ≣E41Olympiad
87Donner Jan-Hein (...2430Larsen Bent (DEN)24150-133 ≣E41Match
95Evans Larry M (USA)2470Sherwin James T (...22460-142 ≣E41Ch USA
67Gligoric Svetozar...2447Stenborg Ake (SWE)22800-148 ≣E41Zt
59Ciocaltea Viktor ...2420Safvat Yousof (IRN)0-146 ≣E41Olympiad (sf)06 Sep 1956
311Maresca FilippoVincenzi R0-122 ≣E41?
362Garralda AGarcia Trobat Fra...22910-133E41It (open)
48Vladimirov Boris ...2340Lisitsyn Georgy (...0-133 ≣E41Ch URS (1/2 final)
9Germek MilanO'kelly De Galway...24600-134 ≣E41It
113Minev Nikolay N (...2370Blatny Frantisek ...21120-137 ≣E41It
349SchepersPiekorz Roland19300-132 ≣E41Ch DDR (corr.)
355Foldi Istvan (HUN)2285Schmittdiel Eckha...24550-136 ≣E41Memorial Elekes
366Siciarz JHoszowski Piotr0-146 ≣E41Ch Poland (corr.)
374Ferrer Serrano Ro...2138Dominguez Ofretor...21380-129 ≣E41It \
115Donner Jan-Hein (...2430Matanovic Aleksan...24900-137 ≣E41It
120Thorbergsson Frey...2340Humerez C0-132 ≣E41Olympiad
54Enevoldsen Jens (...2350Larsen Bent (DEN)24150-129 ≣E41It
414Parulava Temur (GER)2287Dudek Richard (GER)22450-120 ≣E41Bundesliga (2nd) ...
417Gelfand Boris (ISR)2680Korchnoi Viktor (...26150-137 ≣E41It (cat.16)
58Barda Yngvar (NOR)2280Keller Dieter Ren...23590-128 ≣E41Olympiad (sf)02 Sep 1956
92Ojanen Kaarle S (...2335Euwe Max (NED)0-131 ≣E41Olympiad
428Storkebaum Karl H...Cors Heinz-Friedr...19350-137 ≣E41Memorial Weber (o...
438Lyrberg Patrik (SWE)2400Koch Thomas (GER)20540-143 ≣E41It (open)
138Omari FatosSafvat Younnus0-142 ≣E41Olympiad
450Lyrberg Patrik (SWE)2415Bilalic Merim (BIH)22810-129 ≣E41Ch World (juniors...
140Herren WalterBernhardt Rolf (GER)22880-140 ≣E41It
459Valden Petros (GRE)2243Tzoumbas Anastasi...23800-141 ≣E41Ch Greece (team)
463Pihlajamaki JaakkoPennanen Eino0-130 ≣E41?
145Morgulov Alexsand...2335Sardarov Edward (...22060-131 ≣E41Ch Azerbaijan
467Karayannis Athana...2245Nikolaidis Ioanni...25200-143 ≣E41It (open)
470Burlov Vassili (RUS)2345Nikolenko Oleg (RUS)24900-143 ≣E41Ch Moscow
471Khasin Abram (RUS)2420Leonidov Vitaly (...23650-142 ≣E41It (seniors)
146Jenik JHannemann H0-119 ≣E41Europe Tournament...
479Eberhardt Olaf (GER)2099Wohlfart Paulus D...22220-140 ≣E41Oberliga 1997/98
486Galt ArMikhailov Sergey ...23970-130 ≣E41It (open)
147Krutiansky Anatoly AZhdanov Igor0-127 ≣E41Ch Latvia
673Bublei Pavel (RUS)2189Musaev Rasul (RUS)21100-129 ≣E41Ch Russia (junior...19 Apr 2009
502Elsness Frode (NOR)2395Khenkin Igor (GER)26330-150 ≣E41Cup Rilton
25Taimanov Mark E (...2386Euwe Max (NED)0-141 ≣E41Tournament (candi...
532Degtiarev Evgeny ...2180Faizrakhmanov Gen...21900-133 ≣E41Ch Russia (junior...
565Navrotescu Catali...2410Bagheri Amir (FRA)24960-146 ≣E41Ch France (team) ...
676Miranda Yerisbel ...2194Garcia Pantoja Ro...23760-134 ≣E41Memorial J.Capabl...11 Jun 2009
573Biswas KarlCarlucci Paul A0-150 ≣E41It (open) \23 Oct 2003
152Garcia Horacio2200Polo Gomez Vicent...22120-134 ≣E41Ch Buenos Aires
156Harjunpaa VeikkoTschernauskas0-134 ≣E41Cup Baltic (corr.)
159Lapienis Donatas ...2282Rusakov Jury (RUS)22470-124 ≣E41Ch Lithuania
161Bachtiar Arovah (...2285Donner Jan-Hein (...24300-144 ≣E41It \
603Radziewicz Iweta ...2453Turov Maxim (RUS)25460-120 ≣E41It (cat.7)06 Nov 2005
16Idigoras GregorioMarini Luis0-143 ≣E41Ch Argentina
17Najdorf Miguel (POL)2445Reshevsky Samuel ...24300-135 ≣E41Match
645Danilov Evgeny (RUS)2215Iljiushenok Ilia ...23140-126 ≣E41Ch Russia (junior...
653Zavadil Michal (CZE)2057Narayanan Srinath...24120-122 ≣E41It (cat.1) \05 Jul 2008
6Nikolac Juraj (CRO)2438Matanovic Aleksan...24900-128 ≣E41Ch Yugoslavia
664Marinone Lucio (ITA)2008Provera Emanuele ...21380-131 ≣E41It (open)28 Dec 2008
180ZverevicMarkovic Igor (CRO)22070-140 ≣E41Tournament (corr.)
696Lahiri Atanu (IND)2341Savic Miodrag R (...25030-143 ≣E41It (open)12 Jul 2010
703Pesqueira Jose (ARU)1982Dzhumabayev Rinat...25470-135 ≣E41Olympiad21 Sep 2010
715Nieto Emanuel (BEL)2275Tjiam Dharma (NED)23820-140 ≣E41Ch Belgium (team)...27 Feb 2011
181Cherepkov Alexand...2395Tseshkovsky Vital...24720-141 ≣E41Ch URS
496Balogh JBoros Laszlo (HUN)19190-139 ≣E41Ch Hungary (team)...
589Glavas Dragan (CRO)2333Krkljes Slaven (CRO)21671-039 ≣E41Ch Croatia (team)...20 Mar 2005
605Rosin Federico (ITA)2143Bevilacqua Mauriz...21721-044 ≣E41It (open)20 Nov 2005
629Kozhuharov Spas (...2463Daurelle Herve (FRA)22631-030 ≣E41It (open)17 Apr 2007
655Perez Inclan Jorg...1626Lorinczi Retek Pe...16861-035 ≣E41It (open)
672Kozakov Mikhail (...2437Ganin Maksim (UKR)24271-040 ≣E41It \17 Apr 2009
727Gomez Ledo Robert...2452Gensana Berzunces...19971-029 ≣E41It (open)18 Jul 2011