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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
338Marks IanTenev Teno P0-139 ≣E47Europe Tournament...
720Maroszyk Wieslaw ...1938Jaworski Miroslaw...23200-128 ≣E47It (open)22 May 2011
5Martin Pedro (ARG)2021Souza Mendes Joao1-034 ≣E41Zt
4Martin Pedro (ARG)2021Bolbochan Julio (...24400-132 ≣E47Zt
328MatthaeiJust0-132 ≣E47corr.
329MatthaeiSebald Ralph1-028 ≣E41corr.
762Maurer Fritz (SUI)2152Duruz Noe (SUI)19301-033 ≣E47It (open)15 Oct 2012
651Maurer Fritz (SUI)2080Grabher Heinz (AUT)22260-130 ≣E47It (open)26 Apr 2008
170McSheehy CJLudgate Alan (IRL)22650-139 ≣E47Ch Great Britain ...
168Mecking Henrique ...2578Alvarez Jose_ (CUB)23681-022 ≣E47Zt
157MeeristePulliainen Erkki1-024 ≣E47Cup Baltic (corr.)
757Meins Gerlef (GER)2475Poetsch Hagen (GER)24361-041 ≣E47It \14 Jul 2012
572Melkumjanc NicolajDeuber Roman (SUI)20960-121 ≣E20Ch Switzerland
430Mertanen Janne (FIN)2369Nokso-Koivisto An...22350-141 ≣E47Ch Finland (team)...
464Michenka Jozef (CZE)2330Machycek Lubomir ...22550-140 ≣E47Ch MSS
524Michenka Jozef (CZE)2323Holeksa Zdenek (CZE)21061-031 ≣E47It (open)
383Michenka Jozef (CZE)2346Prandstetter Edua...24100-133 ≣E47Ch Czechoslovakia...
337Michenka Jozef (CZE)2346Kazek Krzysztof (...20001-026 ≣E41It
487Michenka Jozef (CZE)2315Klima Lukas (CZE)22851-038 ≣E47It
218Miettinen ReinoBjorkqvist Armas1-028 ≣E47corr.
498Mihelakis GeorgiosGelashvili Tamaz ...25311-019 ≣E47It (open)
560Milanovic Danilo ...2429Vasovski Nikola (...23251-031 ≣E47It (open)
37Milic Borislav (YUG)Matanovic Aleksan...24900-140 ≣E41Match
113Minev Nikolay N (...2370Blatny Frantisek ...21120-137 ≣E41It
676Miranda Yerisbel ...2194Garcia Pantoja Ro...23760-134 ≣E41Memorial J.Capabl...11 Jun 2009
729Mitchell Martin (...2226Jakovljevic Vlado...23860-122 ≣E47It (open)16 Aug 2011
669Mogoranskikh Anto...2080Sotnikovich Georg...20431-029 ≣E47Ch Club MEPHI (1 ...19 Feb 2009
20Moisieev Oleg L (...2385Stoeckl Ernst (AUT)21741-038 ≣E46Match \
12Moisieev Oleg L (...2385Byvshev Vasily Mi...1-034 ≣E41Ch URS
302MolzahnSelke Horst1-035E47corr.
526Montalvo Alejandr...2259Warner Delisle (BAR)21761-031 ≣E47Sub-zt
745Monticelli Romain1820De Gueldre Philip...21270-127 ≣E00Tournament (open)30 Mar 2012
206MoranSantoro O1-031 ≣E47Ch Europe (team) ...
145Morgulov Alexsand...2335Sardarov Edward (...22060-131 ≣E41Ch Azerbaijan
531Motuz Karol (SVK)2354Markos Jan (SVK)24350-137 ≣E47Extra League 2001/02
679Mouritsen Jan (DEN)1758Skovgaard Tom (DEN)19830-143 ≣E47It (open) \22 Jul 2009
296Movre DKalvelis1-025 ≣E47corr.
357MrazCallens Alex22001-045 ≣E47Ch Europe (corr.)
262Mueller Georg (GER)2054Zimmermann Martin...22381-042 ≣E47corr.
395Muir Andrew J (SCO)2360Prandstetter Edua...23750-149E47Cup European Club
610Muir Andrew J (SCO)2341Bellia Fabrizio (...23950-136 ≣E47It (cat.7)17 Feb 2006
393Murdzia Piotr (POL)2472Aleksandrov Aleks...25050-143 ≣E47Ch Europe (juniors)
678Murillo Alexis (CRC)2310Iturrizaga Eduard...25550-146 ≣E40Zt24 Jun 2009
314MyslivecVan Der Kooij Jaap0-123 ≣E47corr.
17Najdorf Miguel (POL)2445Reshevsky Samuel ...24300-135 ≣E41Match
32Najdorf Miguel (POL)2445Salas Romo Julio ...1-031 ≣E47It
565Navrotescu Catali...2410Bagheri Amir (FRA)24960-146 ≣E41Ch France (team) ...
481Nesic Nebojsa (SRB)2175Ostojic Nikola (SRB)24450-138 ≣E47It (cat.8)
738Netusil Miroslav ...2318Sura Jaroslav (CZE)21871-033 ≣E47Ch Czech Republic...27 Nov 2011
538Netusil Miroslav ...2306Prandstetter Edua...23650-135 ≣E47Czech League (V) ...
175Neumann AbrahamCabezudo Carlos1-026 ≣E46Ch World (juniors...
579Ngo Manh Ha (VIE)Vo Thanh Ninh (VIE)23471-039 ≣E41Ch Vietnam (junio...
304Nieland CLaarhoven Thijs (...22111-039 ≣E47corr.
539Niemela Antti (FIN)2256Koskela Niina (FIN)23101-045 ≣E47Ch Finland (team)...
149Niemela IlmariSafvat Y1-029 ≣E41Olympiad
710Nieto De La Cruz ...2154Sanchez Gonzalez ...22861-043 ≣E47Liga Madrilena 20...09 Jan 2011
715Nieto Emanuel (BEL)2275Tjiam Dharma (NED)23820-140 ≣E41Ch Belgium (team)...27 Feb 2011
537Niklasch Oliver (...2324Kveinys Aloyzas (...25410-132 ≣E47It (open)
6Nikolac Juraj (CRO)2438Matanovic Aleksan...24900-128 ≣E41Ch Yugoslavia
657Nikolaev Alexande...1986Abylkassymova Rau...18341-039E40Tournament (open) \05 Aug 2008
674Nikolov Sasho (BUL)2416Nikolov Momchil (...25170-136 ≣E47Ch Bulgaria (team)09 May 2009
677Nikolov Sasho (BUL)2416Videnova Iva (BUL)21970-148 ≣E47It (open)23 Jun 2009
637Nikolov Sasho (BUL)2409Nikolov Momchil (...24890-122 ≣E47Memorial Kesarovs...13 Sep 2007
488Nor Igor (ISR)2280Jagodzinski Andre...22150-141 ≣E47It (cat.2)
478Nor Igor (ISR)2280Seidl Juergen (GER)21701-035 ≣E41Memorial Karl Wag...
369Norri Joose (FIN)2291Hall Jesper (SWE)24931-042 ≣E47It (open)
365Ograbek Grzegorz ...2177Gaida H0-124 ≣E47Ch Poland (corr.)
130Oikamo ReijoUitto Matti1-030 ≣E47?
92Ojanen Kaarle S (...2335Euwe Max (NED)0-131 ≣E41Olympiad
162Ojanen Kaarle S (...2335Cuartas Carlos (COL)22561-026 ≣E41Olympiad
105O'kelly De Galway...2460Secchi Ernesto1-042 ≣E41Ch World (corr.)
126O'kelly De Galway...2460Stockl E1-039 ≣E47It
51O'kelly De Galway...2460Rabar Braslav (YUG)1-030 ≣E47It
138Omari FatosSafvat Younnus0-142 ≣E41Olympiad
358Oriansky AGaspariants I1-048 ≣E47Ch Europe (corr.)
306Ostenstad Berge (...2315O'Cinneide Mel (IRL)22341-028 ≣E46Ch World (juniors...03 Aug 1984
646Ovod Evgenija (RUS)2429Iljushina Olga (RUS)23111-034 ≣E47Ch Russia (club) (w)04 Apr 2008
596Ovod Evgenija (RUS)2366Kosintseva Nadezh...24860-135 ≣E47Ch Europe (w)14 Jun 2005
595Pacheco Daniel (ARG)2297Ferrufino Boris (...22111-041 ≣E21It (cat.2)12 Jun 2005
93Pachman Ludek (GER)2278Sterner Olaf1-043 ≣E47Olympiad
50Palmason Gudmundu...2270Einarsson Jon1-029 ≣E41It
232Palmo Pentti (FIN)2065Hietanen Pentti1-033 ≣E21?
210Pamperin Gerhard ...1999Albert Garrote Am...18681-028 ≣E47corr.
84Panno Oscar (ARG)2438Garcia Vera Romeo1-032 ≣E41Ch Argentina
18Panno Oscar (ARG)2438Ivkov Borislav (SRB)24161-024 ≣E10Ch World (juniors)
410Pappa Domingo (ARG)2120Deforel Jorge Edu...1-021 ≣E47corr.
414Parulava Temur (GER)2287Dudek Richard (GER)22450-120 ≣E41Bundesliga (2nd) ...
432Parulava Temur (GER)2287Ellers Holger (GER)23600-138 ≣E47Ch Germany (junio...
31PasmanTal Mikhail N (LAT)25200-133 ≣E47Ch Latvia
564Pavlovic Milos (SRB)2481Beliavsky Alexand...26600-124 ≣E47Ch Slovenia (team)
619Pelletier Yannick...2588Volokitin Andrei ...26451-030 ≣E47It (cat.17)03 Aug 2006
562Pelletier Yannick...2589Lutz Christopher ...25961-041 ≣E47It (cat.16)
754Peralta Fernando ...2602Cori T Deysi (PER)23861-031 ≣E47It (open)03 Jul 2012
730Peralta Fernando ...2601Pavlidou Ekaterin...22201-039 ≣E47It (open)19 Aug 2011
601Peralta Fernando ...2538Papp Gabor (HUN)24740-125 ≣E47It (open)24 Oct 2005
725Peralta Fernando ...2602Cruz Jonathan (PER)24121-042 ≣E47It (open)03 Jul 2011
607Perepelitsky Edwa...2123De Guzman Ricardo...23830-133 ≣E47It (open)19 Dec 2005
655Perez Inclan Jorg...1626Lorinczi Retek Pe...16861-035 ≣E41It (open)
703Pesqueira Jose (ARU)1982Dzhumabayev Rinat...25470-135 ≣E41Olympiad21 Sep 2010
136Petersons AndrejsVoitkevics P1-030 ≣E47Ch Latvia