Dragon's Keep:

Rules:
* Gamble-Master (G.M.) will roll D100 once. Then the gambler rolls once:

Payoff:
If the gambler rolls the exact number as the G.M. rolls = 50 to 1.
If gambler rolls within 1, higher or lower, of the gamble-master's throw = 20 to 1
If gambler rolls within 2, higher or lower, of the gamble-master's throw = 10 to 1
If gambler rolls within 3, higher or lower, of the gamble-master's throw = 2 to 1

* Minimum bet is usually one Electrum.