Who do I have to play to beat everyone in Dice in Flotsam?

Solution 1:

You must beat two guys (Casmir and Bendeck) at the Inn before the third (Sindram) will play you. Must beat him before the dwarf bookseller (Einar Gausler) will play you. Must beat him before you can play Sendler (found in Lobinden village to the east of Flotsam). Beating Sendler makes you the best in Flotsam and completes a side-quest (Poker Face: Flotsam) and he'll offer you the troll head as a reward.