De Koster, Franzke K. (NED) - Svanholm, Børge W. 0-1, Oslo Chess International, Elo-group (1), Oslo, 2011.10.02
De Koster, Franzke K. (NED) - Torgersen, Eric 0-1, Oslo Chess International, Elo-group (5), Oslo, 2011.10.02
De Koster, Franzke K. (NED) - Gholami, Anita 0-1, Oslo Chess International, Elo-group (9), Oslo, 2011.10.02
De Koster, Franzke K. (NED) - Mihajlov, Svetoslav 0-1, Sveins Minneturnering (1), Oslo, 2010.06.18
De Koster, Franzke K. (NED) - Roholdt, Njaal 0-1, Sveins Minneturnering (7), Oslo, 2010.06.18
De Koster, Franzke K. (NED) - Sætre, Roger 0-1, Sveins Minneturnering (9), Oslo, 2010.06.18
De Koster, Franzke K. (NED) - Johansen, Bjørn Berg 0-1, Gausdal Classics, Elo (8), Gausdal, 2008.04.15
De Koster, Franzke K. (NED) - Hansen, Erle Andrea Marki 1-0, Gausdal Classics, Elo (6), Gausdal, 2008.04.13
De Koster, Franzke K. (NED) - Lie, Terje 1-0, Gausdal Classics, Elo (5), Gausdal, 2008.04.12
De Koster, Franzke K. (NED) - De Luna, Alberto (ESP) 0-1, Gausdal Classics, Elo (2), Gausdal, 2008.04.09
De Koster, Franzke K. (NED) - Jacobsen, Maria Pitz 0-1, Gausdal Classics, Elo (9), Gausdal, 2007.04.26
De Koster, Franzke K. (NED) - Hansson, Bo (SWE) 1-0, Gausdal Classics, Elo (7), Gausdal, 2007.04.24
De Koster, Franzke K. (NED) - Johansen, Bjørn Berg 0-1, Gausdal Classics, Elo (5), Gausdal, 2007.04.22
De Koster, Franzke K. (NED) - Thingstad, Even 0-1, Gausdal Classics, Elo (2), Gausdal, 2007.04.19
De Koster, Franzke K. (NED) - Haug, Sverre A. 0-1, Gausdal Classics, Elo (1), Gausdal, 2007.04.18
Antall partier: 15