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A 49-page PDF (and text file version) with a bidding-tree of the whole system as played by Verhees – van Prooijen during their career, which included a Bermuda Bowl title.
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Symmetric relay system with Meckwell tendencies, played by one of the most successful Dutch pairs in history, Simon de Wijs and Bauke Muller.
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A 66-page PDF description of the professional system that grew out of the Italian system created for the Dutch junior team but is now distinctly Dutch, exciting to play, used by pairs such as Brink-Drijver and de Leon-Sprinkhuizen.
