William Doubleday vs Sergey Gennadyevich Kudrin
Ontario Open Brantford round 1 2004.05.22
Grünfeld Defense: Three Knights Variation, Hungarian Attack 0-1

William Doubleday vs Francisco De la Paz Perdomo
Canadian Open Ottawa CAN round 1 2007.07.07
King’s Indian Defense: Kazakh Variation 1-0