Bockrounds and Ramschrounds
A Bockround is a round (i.e. 3 consecutive deals when there are 3 players; 4 deals when there are 4 players) played for double stakes (i.e. double scores). Note that this doubling only affects the final scores on the scoresheet; the bids and game values are unaffected. It is usual to play a Bockround after some special event; the events which cause a Bockround should be agreed before the game. Possibilities are:
a hand where the declarer and the opponents take 60 points each
a successful Kontra - i.e. the opponents Kontra and the declarer loses
a successful Grand Hand
a player's cumulative score being some special number - for example a multiple of 100, or a number with 3 or more digits all equal, such as 222.
Note that if you have too many of these, you will end up playing for double score all the time, and you might as well have just agreed to double the stake and not have bothered with the Bockrounds.