Wolperts on Competitive Bidding Notes: Doubles You cannot view this unit as you're not logged in yet. To access this content, you must purchase Wolpert's Competitive Bidding: Doubles (September 25 2020).Post navigationPrevious post: Wolperts on Competitive Bidding: Doubles – September 25, 2020 Video CourseNext post: Conventional Wisdom Notes: Two Over One Game Forcing