Karet


This version mainly involves more money and more advantages for the dealer. It's not called Dealer's Diamondback for nothing. The differences are ( numbered with the steps in the basic rules they apply to):

1. The New Dealer

The winner of the previous hand becomes the dealer in the next round. Though it is not mentioned, we can assume that in case of more than one winner, a draw is held.

2. Paying an ante

Before even dealing starts, each player has to pay an ante of varying height in the pot. In the cities, this went up to 10 copper bits, and the game was thus known as Rich Man's Folly. The ante means that you can't fold without loss.

3./4. Doubling wagers

Players don't only have to match the dealer's wager; they have to double it. According to one source, the initial wager has to be only matched, not doubled; this may be the feature that distinguishes Dealers's Diamondback (match) from Karet (double). Obviously this leaves the dealer in a very favourable position in any case: he only risks half as much as the others during betting.

4. Folding

Folding is only possible after doubling the dealer's initial bet, so it can come quite expensive.
 

Match Diamondback


A more group-oriented version that gives less power to the dealer. The difference is (again related to the basic rules):

4. Ending Bets

Betting stops when a majority of the players agree on it. The dealer gets no special vote here. Match diamondback games have been known to go on for days, or even months, with interruptions.
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