Petals Around the Rose: Fraternity Register

I had a few friends who told me of this great game which was complicated and was a simple puzzle which took them each over a few hours. They're all pretty smart so I'd figure it was a tricky puzzle. They kept putting it off, busy and what not. Till about a few minutes ago I was sent the link to the bill gates story, I was reading through it and by the time I had gotten to the third roll on there it hit me. I was thinking similarly throughout the passage, but something about those sixes gave it away. Dunno what. Intuition is my balance to genius.