3oaM went through at least three format changes during its nearly three year run. IIRC, the last format had the players win three matches against their opponents to win $5000 in prizes. That means that each contest took between two or three days to complete. So that somebody might win something during a episode, The Big Match was added.
The gameboard was set up so that black dots were behind ten of of the twelve choices. The other two choices were drawings of half of a one thousand dollar bill (remember those, oldtimers?). Each player, in turn, chose a box and if one of the half bills was revealed, that player chose one more box and if the other half were there that player won the money. If the money was not won, the bonus accumulated to the next day's jackpot.
In the episodes I saw, each half-bill was in a separate column and the right half was always in a column that was on the right of the left half. My question is: was that always the set up? If so, that was increase the chances of a winner.