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QGD; Semi-Tarrasch 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e3

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
97Olafsson Fridrik ...2434Gruenfeld Ernst F...1-047 ≣A17It \
105Ophoff Rigobert (...1999Latko1-016 ≣E00Ch OWL
23Opocensky Karel (...Foltys Jan (CZE)1-074 ≣E00Match
93Opocensky Karel (...Kozma Julius (CSR)23801-041 ≣D30Ch Czechoslovakia
517Orzechowski Jacek...2228Bures Martin (CZE)21691-057 ≣A16Czech League 2005...09 Apr 2006
480Ovsejevitsch Serg...2521Zubov Alexander (...24871-031 ≣A05Ukrainian Games
131Pachman Ludek (GER)2278Zita Frantisek (CZE)1-037 ≣A13Ch Czechoslovakia
78Pachman Ludek (GER)2278Neikirkh Oleg N (...23701-026 ≣A17Izt
207Pachman Ludek (GER)2278Yanofsky D A (CAN)24101-041 ≣A05It (a)
41Pachman Ludek (GER)2278Wallis Philip1-053 ≣A40Ch Great Britain
275Pachman Ludek (GER)2410Cserna Laszlo (HUN)23900-154 ≣A16It
92Pachman Ludek (GER)2278Giustolisi Albert...22701-041 ≣A17Izt
134Pachman Ludek (GER)2278Porath Yosef (ISR)23401-038 ≣A17Izt
86Padevsky Nikola (...2355Hadjipetrov Alexa...22901-030 ≣D41Ch Bulgaria
305Paehtz Thomas (GER)2515Andrijevic Milan ...23951-024 ≣E10?
609Paikidze Nazi (GEO)2381Sahin Gizem (TUR)15781-028 ≣A40Ch Turkey (team)16 Jul 2012
542Palacios Efrain (...2117Harter Jorge (PER)21360-170 ≣A56Memorial Jose Mar...15 Jan 2008
160Palmason Gudmundu...2270Kieninger Georg (...1-050 ≣E10It
344Panzalovic Srdjan...2458Sinanovic Muhamed...24031-055 ≣A04It
272Peev Peicho (BUL)2405Karolyi Tibor Jr ...24301-069 ≣E10It (cat.7)
322Peev Peicho (BUL)2284Andrijevic Milan ...23330-135 ≣E10It
274Pein Malcolm (ENG)2382Orr Mark J L (IRL)22600-142 ≣A05It
505Pelletier Yannick...2583Prusikin Michael ...25641-046 ≣A05Ch Switzerland (t...05 Jun 2005
495Peng Zhaoqin (NED)2420Gagunashvili Mera...25671-054 ≣A46It (cat.9)
385Peralta Eduardo (...2350Kropff Ricardo (PAR)22360-172 ≣A46Ch Paraguay
498Peralta Fernando ...2531Borges Mateos Jua...24840-147 ≣D41It (open)16 Jul 2004
522Perez Mauricio Xo...2120Roca Rivera Aleja...17991-044 ≣A06It (open)12 Aug 2006
491Perrin RichardCoburn Joe1-015 ≣D41It (open)09 Nov 2003
167Petrosian Tigran ...2580Najdorf Miguel (POL)24451-035 ≣A17It \
32Petrosian Tigran ...2580Khavsky Sergey V ...23141-053 ≣A46Ch URS (juniors) ...
577Petukhov Dmitry (...2309Fedukin Alexandre...19091-022 ≣A13Ch City25 Feb 2010
433Petukhov Vasily N...2183Sultangareev Mara...22910-139 ≣A05Cup Russia (open)
296Piarnpuu Leili (EST)2109Khadilkar Rohini ...22150-136 ≣A05It (w)
590Piasetski Leon (CAN)2305Kierzek Matthias ...21531-034 ≣A15It (open)11 Jan 2011
557Pinter Jozsef (HUN)2536Almasi Istvan (HUN)23991-033 ≣A04Ch Hungary (team)...21 Dec 2008
307Piontek HKeskowski Thilo (...21271-021 ≣D41corr.
199Podgaets Mikhail ...2485Klovsky Rafail (UKR)23051-034 ≣E00Olympiad URS
604Podgornova AnnaSemenova Alena (RUS)19550-132 ≣A43Ch PriFO (w)20 Mar 2012
145Polgar Istvan (HUN)2425Lengyel Levente (...22930-130 ≣A05Ch Hungary
370Polgar Zsuzsa (USA)2550Chiburdanidze Mai...25051-037 ≣E10Tournament (candi...
180Polugaevsky Lev A...2585Kholmov Ratmir D ...24321-042 ≣A17Ch URS (team)
103Polugaevsky Lev A...2585Khasin Abram (RUS)23901-034 ≣D02Ch URS
181Polugaevsky Lev A...2585Gheorghiu Florin ...23831-033 ≣A17It
258Popov Luben (BUL)2435Nikolov Sasho (BUL)24040-139A13Ch Bulgaria
124Popov Luben (BUL)2317Aitken James22001-021 ≣E10Zt
297Portisch Ferenc (...2420Zier Ludwig (GER)22401-035 ≣E00It (open)
178Portisch Lajos (HUN)2523Padevsky Nikola (...23551-035 ≣A17It
138Portisch Lajos (HUN)2523O'kelly De Galway...24601-027 ≣A17It
82Portisch Lajos (HUN)2523Florian Tibor (HUN)1-034 ≣A17Memorial Asztalos
217Poulsson Eivind (...2340Farago Ivan (HUN)24200-132 ≣A40?
535Premnath R (IND)2254Golizadeh Asghar ...22851-018 ≣E10Ch Asia (juniors)...30 Jun 2007
347Pribyl Josef (CZE)2305Halouzka Jiri (CZE)1-043 ≣E10Ch Czechoslovakia...
544Prohaszka Peter (...2502Wittmann Walter (...22811-043 ≣D35It (cat.8)09 May 2008
257Psakhis Lev (ISR)2615Semkov Semko (BUL)23751-0112 ≣E00It (cat.11)
323Raetsky Alexander...2437Zankovich Viaches...0-142 ≣A46Ch URS (club)
380Ragozin Evgeni (RUS)2430Lima Darcy (BRA)24750-144 ≣A13It (open)
238Razuvaev Yuri S (...2470Farago Ivan (HUN)25101-031 ≣A40It
254Razuvaev Yuri S (...2495Deze Anton (YUG)24351-040 ≣A04It (cat.11)
237Rein GLentzsch H1-044 ≣A17corr.
508Repasi Zoltan (HUN)2127Szabo Balazs (HUN)22321-063 ≣E10It (open) (b)24 Jun 2005
428Riazantsev Alexan...2417Lugovoi Aleksei (...25090-130 ≣A46Memorial M.Chigor...
108Ribeiro Sabino JrAsfora Eduardo1-026 ≣E10Ch Brazil
255Ribli Zoltan (HUN)2580Deze Anton (YUG)24351-037 ≣A04It (cat.11)
7Rjumin N (RUS)Levenfish Grigori...1-035 ≣D02It
269Robatsch Karl (AUT)2430Goehring Karl-Hei...23350-152 ≣A09Bundesliga 1983/84
393Roca Alfredo (ARG)2385Diaz Fernandez Iv...22490-141 ≣A46Ch Spain (team) (b)
423Rocivan JoseDe Araujo Jose Ni...0-144 ≣E00Ch Cearense
474Roiz Michael (ISR)2512Michenka Jozef (CZE)23511-034 ≣E10It (open)
496Roiz Michael (ISR)2560Beccaris Gabriele...20661-022 ≣A05It (open)08 Feb 2004
299Rolle HannesGruenberg G1-030 ≣A56corr.
13Romanovsky Peter ...Ilyin-Zhenevsky A...1-019 ≣E10Ch URS (1/2 final)
291Rosenkranz HLederer G0-131 ≣E10corr.
288Roshkov VVZuechner G1-037 ≣A17Europe Tournament...
462Rosin Ralf (GER)2060Boecking Uwe17091-025 ≣E00Landesliga (2nd) ...28 Jan 2001
571Rubio Mancebon Pe...1943Martinez Lopez-Co...17041-061 ≣A46Ch Spain (team) \23 Nov 2009
403Ruether Rudolf (GER)2184Galow Wolfgang (GER)21291-022 ≣D02Bayern Landesliga...
475Ruiz MarioDe Andres Carlos1-011 ≣D02Ch Salamanca
449Ruzele Darius (LTU)2541Bilinskas Raimund...23061-031 ≣E00Ch Lithuania
172Sanchez MiguelHort Vlastimil (GER)24660-124 ≣E10Ch Armies
79Sanguinetti Raul ...2485Averbakh Yuri L (...24450-129 ≣A17Izt
601Saric Ante (CRO)2528Galic Ivan (CRO)23601-039 ≣A30It (open)08 Mar 2012
201Savon Vladimir A ...2595Jansa Vlastimil (...24801-031 ≣A17It04 Sep 1972
188Sazontiev SSosonko Gennadi (...25201-042 ≣E00Ch Leningrad
59Scafarelli France...2269Bergraser Volf (FRA)1-051 ≣A06Olympiad
225Schinzel Wladysla...2375Tepper M22001-021 ≣A17It
80Schlieder RolfIglitzkij AM0-123 ≣A16corr.
213Schmid Lothar (GER)2530Commons Kim S (USA)24450-132 ≣A04?
441Schmidt Jan Peter...2315Blanco Sanjuan Jo...21851-026 ≣A05It (open)
21Schmidt Paul F (EST)Keller Hans0-133 ≣E10Ch Germany
292Schreiber Kurt (GER)2102Scheil Dietrich1-028 ≣D41corr.
204SchubertSchlicht Heinz1-029 ≣D41corr.
183Schweber Samuel (...2348Riego Victorio (PAR)21681-052 ≣A34Zt
161Schweber Samuel (...2348Emma Jaime (ARG)23950-170 ≣E00Zt
510Sciwarski Mariusz...1936Labun Kornel (POL)18201-023 ≣A56It (open) (b)
18Seidman HerbertFine Reuben (USA)0-137 ≣A16Ch USA
532Seifert Gerhard1424Pfefferle Nico14150-142 ≣D02Ch Baden (AT1)12 Apr 2007
149Shamkovich Leonid...2342Robatsch Karl (AUT)23491-045 ≣A13It
437Shchekachev Andre...2503Kohlweyer Bernd (...24551-042 ≣A05It (open)
524Shimanov Aleksand...2389Valov Ilya (RUS)22981-028 ≣A05It (cat.4) \18 Aug 2006
545Shimanov Aleksand...2476Amanov Zhanibek (...24210-152 ≣D35It \