Ambassadeurs : Upton, Timothy J (19x), Sadowski, Marek (14x), Zeidler, Sven P. (14x), Schakel, Corky (11x), Soderberg, Per (11x), Mikhailukov, Ivan (10x), Starostits, Ilmars (10x), Ashby Prajeesh (9x)
4.Bb5 — 20.2% (602 parties)
Ambassadeurs : Ablancourt, Jordan (8x), Dunn, Carl E (7x), Gonzalez, Alejandro Raul (7x), Markus, Roland (5x), Kun, Gabor (5x), Simmelink, Joop Theo (5x), Law, Steve (5x), McDonald, Graham R (5x)
4.exd5 — 5.9% (175 parties)
Ambassadeurs : Gierth, Karlheinz (3x), Boyd, Stefan (2x), Eraclides, George (2x), Jones, Chris (2x), Wheeler, James M (2x), Jenneborg, Seved (2x), Szymanowski, Igor (2x), Friede, Gunnar (1x)
1950 — Milev, Zdravko vs Bobekov, Radko — 1/2-1/2 — Sofia BUL 1951 — Fink, Adolf Jay vs Fajans, Harry — 0-1 — Forth Worth 1952 — Piskov, Kamen Penev vs Bobotsov, Milko G — 0-1 — Sofia BUL 1953 — Fink, Adolf Jay vs Burger, Robert — 0-1 — No. California 1955 — Prochownik, Franciszek vs Litmanowicz, Wladyslaw — 1-0 — Poland ch13
4.Bb5 — 20.2% (602 parties)
1951 — Rutherford vs Andersson, Ebba 2009 — 0-1 — Stockholm SWE 1953 — Travnitzky, Gustav vs Nievergelt, Erwin — 0-1 — Vienna AUT 1954 — Filichev, Alexander vs Pelitov, Dimitar — 1-0 — Sofia BUL 1956 — Mechkarov, Ventzeslav vs Christoph, Manfred, Dr. — 1/2-1/2 — Teteven 1960 — Alkan, Tan vs Paidousis, Aristidis — 1-0 — Leipzig olm
4.exd5 — 5.9% (175 parties)
1957 — Foley, Phil T vs Blackstone, John — 0-1 — San Jose, CA USA 1965 — Friede, Gunnar vs Gerolies — 1/2-1/2 — corr Baltic 1972 — Stanciu, Traian vs Nacht, Edgar — 1/2-1/2 — Bucharest ROU 1989 — Kuban, Guenther vs Schuchardt, Guenter — 1-0 — GER 1991 — Vlahovic, Svetozar vs Vujosevic, Vladimir — 0-1 — Pula CRO
4.d3 — 3.8% (112 parties)
1957 — Kozomara, Vlado vs Bahro, Tom — 1/2-1/2 — Sombor 1957 — Kozomara, Vlado vs Milic, Borislav — 0-1 — Sombor 1982 — Thomassen, Kjell Arne vs Aprinda Kornelius Hanson — 0-1 — Hammerfest 1989 — Schurade, Matthias vs Pokorny, Zdenek — 0-1 — Olomouc Olomouc CZE 1992 — Petersen, Flemming Petri vs Pedersen, Daniel Vesterbaek — 0-1 — Aarhus DEN
1951 — Fink, Adolf Jay vs Fajans, Harry — 0-1 — Forth Worth
1952 — Piskov, Kamen Penev vs Bobotsov, Milko G — 0-1 — Sofia BUL
1953 — Fink, Adolf Jay vs Burger, Robert — 0-1 — No. California
1955 — Prochownik, Franciszek vs Litmanowicz, Wladyslaw — 1-0 — Poland ch13
1953 — Travnitzky, Gustav vs Nievergelt, Erwin — 0-1 — Vienna AUT
1954 — Filichev, Alexander vs Pelitov, Dimitar — 1-0 — Sofia BUL
1956 — Mechkarov, Ventzeslav vs Christoph, Manfred, Dr. — 1/2-1/2 — Teteven
1960 — Alkan, Tan vs Paidousis, Aristidis — 1-0 — Leipzig olm
1965 — Friede, Gunnar vs Gerolies — 1/2-1/2 — corr Baltic
1972 — Stanciu, Traian vs Nacht, Edgar — 1/2-1/2 — Bucharest ROU
1989 — Kuban, Guenther vs Schuchardt, Guenter — 1-0 — GER
1991 — Vlahovic, Svetozar vs Vujosevic, Vladimir — 0-1 — Pula CRO
1957 — Kozomara, Vlado vs Milic, Borislav — 0-1 — Sombor
1982 — Thomassen, Kjell Arne vs Aprinda Kornelius Hanson — 0-1 — Hammerfest
1989 — Schurade, Matthias vs Pokorny, Zdenek — 0-1 — Olomouc Olomouc CZE
1992 — Petersen, Flemming Petri vs Pedersen, Daniel Vesterbaek — 0-1 — Aarhus DEN