There is a monthly scratch tournament here in Louisville, KY called THE MAIN EVENT that has some really challenging conditions, which are different every month.  $60 entry fee, 5 games across 10 lanes for qualifying, top 16 go on to 2 match match-play, highest total pinfall moves on.  High qualifier and highest 2 game match play pinfall usually win a free ball.  $1000 first place.  Check out kyanabowl.com for information