Dutch 200
In ten-pin bowling, a Dutch 200 is a game in which the bowler records a score of 200 by getting strikes and spares in alternation throughout the game. Strikes, when thrown in the even-numbered frames, require six spares. For strikes in the odd-numbered frames, five spares are needed, with a strike on the last shot of the game. When bowled in certified play, the certifying body may issue a patch or other award commemorating the feat.
The term is thought to originate from the phrase "Dutch treat" which is when two individuals share the cost of a date.
Traditionally, a Dutch 200 is one of the hardest games to bowl due to the alternation of the spares and strikes which gives each frame a score of 20. Note that there are over 1.5 billion other ways to bowl an exact 200 game without using either method.