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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
692Ruschukov BojanNikolova Adriana ...22950-137 ≣E40It \22 May 2010
643Andreev Stanislav...2097Nikolova Adriana ...22811-041 ≣E47It \24 Feb 2008
674Nikolov Sasho (BUL)2416Nikolov Momchil (...25170-136 ≣E47Ch Bulgaria (team)09 May 2009
637Nikolov Sasho (BUL)2409Nikolov Momchil (...24890-122 ≣E47Memorial Kesarovs...13 Sep 2007
430Mertanen Janne (FIN)2369Nokso-Koivisto An...22350-141 ≣E47Ch Finland (team)...
213Bergdahl AssarNordstrom Felix (...21810-140 ≣E41corr.
285Hoi Carsten (DEN)2390Norgaard Jesper (...24081-034 ≣E47Tournament
546Davydenko Andrey ...2080Novoselsky Oleg (...21950-140 ≣E46Memorial Y.Sakhar...
398Hoszowski PiotrNowak Z1-037 ≣E47Ch Poland (corr.)
759Arishin Sergei (KGZ)2183Nukin Ashat (KAZ)23470-125 ≣E21Memorial Izmailov...12 Aug 2012
196Karjarinta TapaniNurmi Toivo0-128 ≣E41?
518Salo Heikki (FIN)2242Nyysti Sampsa (FIN)22150-148 ≣E47Ch Finland (team)...
268Hermlin Aarne (EST)2233Oberwalthal1-047 ≣E47World Tournament ...
306Ostenstad Berge (...2315O'Cinneide Mel (IRL)22341-028 ≣E46Ch World (juniors...03 Aug 1984
634Kashlinskaya Alin...2263Ogleznev Alexandr...22621-041 ≣E47It \22 Jul 2007
191Colon Romero MiguelO'kelly De Galway...24600-136 ≣E47It
9Germek MilanO'kelly De Galway...24600-134 ≣E41It
176Diez Del Corral J...2415O'kelly De Galway...24600-144 ≣E41It
426Maki-Torkko Martt...2195Oksanen Yrjo1-032 ≣E47?
76Dittmann SieghardOlafsson Fridrik ...24340-140 ≣E41Olympiad (student...
251Rodriguez Orestes...2485Olafsson Fridrik ...25300-126 ≣E41It (cat.10)
332Lalic Bogdan (ENG)2485Ortega Lexy (ITA)24401-040 ≣E47It (cat.11)
183Shashin Alexsande...2350Osnos Viatcheslav...23841-041 ≣E47Ch Leningrad
103Geller Efim P (RUS)2455Osnos Viatcheslav...23841-050 ≣E47Ch URS (1/2 final)
444Tikkanen Kari (FIN)2265Osterman Georg (FIN)22811-048 ≣E47?
370Anapolsky Sergey ...2407Ostojic Nikola (SRB)24461-039 ≣E47Match \
481Nesic Nebojsa (SRB)2175Ostojic Nikola (SRB)24450-138 ≣E47It (cat.8)
97Gligoric Svetozar...2447Pachman Ludek (GER)22781-042 ≣E47Izt
237Tarjan James E (USA)2490Padevsky Nikola (...23551-030 ≣E41It
107Geller Efim P (RUS)2455Padevsky Nikola (...23551-044 ≣E41It
163Furman Semen (RUS)2550Padevsky Nikola (...23551-042 ≣E41Ch Czechoslovakia...
406Semkov Semko (BUL)2450Padreny J1-036 ≣E47It (open)
721Kostov Galin (BUL)2197Pantev Veselin (BUL)23730-145 ≣E47Ch Bulgaria (team...05 Jun 2011
682Rees Ioan (WLS)2339Pap Gyula (HUN)25030-146 ≣E10It (cat.8)03 Aug 2009
601Peralta Fernando ...2538Papp Gabor (HUN)24740-125 ≣E47It (open)24 Oct 2005
617Ganaus Hannes (AUT)2326Papp Gabor (HUN)24660-132 ≣E47It (open)14 Jul 2006
591Drozdowski Kacper...1812Paprocki Jaroslaw...22270-148 ≣E21Tournament (regio...04 Apr 2005
510Korotylev Alexey ...2528Paramonov Dimitri...23321-032 ≣E47Memorial M.Chigor...
718Tyn Ondrej1902Pavelek Karel (CZE)21550-134E21Czech League 2010...03 Apr 2011
598Galopoulos N (GRE)2016Pavlidis Antonios...20100-145 ≣E47Ch Greece (team)08 Jul 2005
615Galopoulos N (GRE)2063Pavlidis Antonios...21070-124 ≣E47Ch World (schools)01 May 2006
730Peralta Fernando ...2601Pavlidou Ekaterin...22201-039 ≣E47It (open)19 Aug 2011
697Kapnisis Spyridon...2511Pavlidou Ekaterin...21911-041 ≣E47Cup Artemis (open)14 Jul 2010
547Ferrufino Boris (...2201Pecorelli Garcia ...24510-133 ≣E47It \
463Pihlajamaki JaakkoPennanen Eino0-130 ≣E41?
611Iotov Valentin (BUL)2503Petkov Vladimir (...24431-031 ≣E47Ch Bulgaria
434Vaisser Anatoly (...2555Petursson Margeir...25651-026 ≣E47It (open)
275Mann VPiastowski Kurt (...19780-124 ≣E41Ch DDR (corr.)
291Hesselbarth Karlh...1808Piastowski Kurt (...19781-039 ≣E41Ch DDR (corr.)
339BaruckerPiekarz P1-022 ≣E47corr.
349SchepersPiekorz Roland19300-132 ≣E41Ch DDR (corr.)
273Lukacs Peter (HUN)2405Pinkas Karol (POL)23201-041 ≣E21It (a)
236Sydor Andrzej (POL)2325Pinkas Karol (POL)23201-045 ≣E41It (b)
415Erwes Theo (GER)2104Pioch Thomas (GER)21651-043 ≣E47Hessenliga 1993/94
439Hultin Per (SWE)2102Plato Bo (SWE)20800-130 ≣E47Ch Sweden (team)
188Taimanov Mark E (...2386Platonov Igor V (...24301-037 ≣E47Ch URS
750Shiva Ravi Pillai...1861Podolchenko Evgen...24640-127 ≣E46Cup Mayors (open)10 Jun 2012
757Meins Gerlef (GER)2475Poetsch Hagen (GER)24361-041 ≣E47It \14 Jul 2012
158Farago Ivan (HUN)2488Pogats Jozsef (HUN)22301-028 ≣E47Ch Hungary
30Szabo Laszlo (HUN)1903Pogats Jozsef (HUN)22301-034 ≣E41Ch Hungary
152Garcia Horacio2200Polo Gomez Vicent...22120-134 ≣E41Ch Buenos Aires
153Emma Jaime (ARG)2395Polo Gomez Vicent...22120-144 ≣E41Ch Buenos Aires (...
654Baciu Stefan (ROM)2242Pop Alexandru (ROM)19660-136 ≣E47Tournament (open)20 Jul 2008
243Ivanov Igor V (CAN)2424Popov Nikolay (MDA)24100-140 ≣E41Tournament
150Portisch Lajos (HUN)2523Porath Yosef (ISR)23401-044 ≣E41Olympiad
144Reshevsky Samuel ...2430Porath Yosef (ISR)23401-034 ≣E41Izt
10Bronstein David I...2432Porath Yosef (ISR)23401-049 ≣E47Olympiad
383Michenka Jozef (CZE)2346Prandstetter Edua...24100-133 ≣E47Ch Czechoslovakia...
395Muir Andrew J (SCO)2360Prandstetter Edua...23750-149E47Cup European Club
392Hlavnicka Jiri (CZE)2243Prandstetter Edua...24100-129 ≣E47Ch Czech Chess Union
538Netusil Miroslav ...2306Prandstetter Edua...23650-135 ≣E47Czech League (V) ...
288Knaak Rainer (GER)2490Prandstetter Edua...24401-027 ≣E47Ch Czechoslovakia...
326Frieser Klaus (GER)2151Prizant Michael (...21360-138 ≣E41Europe Tournament...
239Reid Alan (SCO)2205Prizant Michael (...21360-120 ≣E47Ch Great Britain
664Marinone Lucio (ITA)2008Provera Emanuele ...21380-131 ≣E41It (open)28 Dec 2008
625Henrichs Thomas (...2498Prusikin Michael ...25640-126 ≣E47Ch Germany23 Jan 2007
157MeeristePulliainen Erkki1-024 ≣E47Cup Baltic (corr.)
442Karp Serge (LUX)2095Pytel Krzysztof (...24250-122 ≣E10It (open)
277Loschi EQuattrocchi Gaetano1-022E46?
7Vukovic Sava (YUG)Rabar Braslav (YUG)0-123 ≣E41Ch Yugoslavia
38Fuderer Andrija (...Rabar Braslav (YUG)0-139 ≣E47Ch Yugoslavia (ma...
8Vukovic Sava (YUG)Rabar Braslav (YUG)0-123 ≣E41Ch Yugoslavia
51O'kelly De Galway...2460Rabar Braslav (YUG)1-030 ≣E47It
274Hawelko Marek (POL)2380Radziejewski Dari...23001-045 ≣E47It
231Koski PekkaRantanen Veikko1-023 ≣E41?
137Tanin SRausch Wilfried (...22451-029 ≣E41corr.
111Letelier Rene (CHI)2151Redolfi1-049 ≣E41?
441Sanchez Cutillas ...2083Reig Albero Ferra...21621-029 ≣E41Ch Aragon (team)
193Schmidt Waldemar ...2029Reimer Karl17040-134 ≣E46corr.
117Schweber Samuel (...2348Reinhardt Enrique...1-046 ≣E47Ch Argentina (pla...
62Tserendagva D (MGL)Reissmann Paul (PRO)1-030 ≣E40Olympiad12 Sep 1956
68Golz Werner (GER)2410Rellstab Ludwig S...22650-124 ≣E40It
17Najdorf Miguel (POL)2445Reshevsky Samuel ...24300-135 ≣E41Match
258Portisch Ferenc (...2475Rigo Janos (HUN)23851-036 ≣E41Ch Hungary
313Portisch Ferenc (...2405Rigo Janos (HUN)23190-141 ≣E47It (open)
257Pinter Jozsef (HUN)2445Rigo Janos (HUN)23851-040 ≣E21Ch Hungary
501Babula Vlastimil ...2567Rigo Zsolt (SVK)22221-027 ≣E47Ch Slovakia
644Chuprikov Dmitry ...2443Rodin Dmitrij (RUS)24211-046 ≣E47Ch City06 Mar 2008
401Reinemer Frank (GER)2275Roemling Sven (GER)21601-046 ≣E41It (open)
133Zilber Israel (USA)2400Roizman Michael (...21941-048 ≣E41Ch URS (team)