Take a look at the following table. The vertical columns have all picks by the player listed at the very top, one after the other. You'll also notice different shades of grey moving in a weird way through the picks, first descending to the left, then right, then left again. As you might guess, the same shade of grey here denotes cards taken from the same booster pack. That's to help you see what choices the player faced when he made a particular pick. By going along the diagonal line of same-colored boxes downwards, you can see what cards were left in the booster at any point in the draft.
Neat, isn't it?
A big thankyou goes to the judge staff at this Grand Prix, who made all of this possible by meticulously recording all of the picks!