select date from a previous set array from another node

I have created the folowing nodes using CCK Content types:

Node1: Competition A - from 1/1/2011 - 1/3/2011 (both data with Date module)
Node2: Competition B - from 3/15/2011 - 3/18/2011 (both data with Date module)

Node3: game1
Node4: game2

For the game content type I have created a Node reference field (using CCK) to be able to link the created game to one of the existing competitions.

I also would like to have a date & time set for the game that is between the startdate and enddate of the linked competition.

Anyone an Idea how to proceed with that?
Help would be appreciated!

Thanks,
Wim