Yamb (game)
Yamb is a public domain dice game similar to Yacht and Yahtzee (trademarked by Hasbro in the United States). Gameplay. Yamb can be played solitaire or by any number of players. Players take turns rolling five dice. After each roll, the player chooses which dice to keep, and which to reroll. A player may reroll some or all of the dice up to two times on a turn. The player must put a score or zero into a score box each turn. The game ends when all score boxes are used. The player with the highest total score  wins the game. The table consists of several columns (usually 4 or 6) and two sections. Each column is filled according to the following rules: Extra columns. It is possible to expand the game with additional columns selected at the discretion of the players. The most common additional columns include: Scoring. The following combinations earn points: Upper Section. If a player manages to score at least 63 points (an average of three of each number) in the upper section, they are awarded a bonus of 30 points. Lower Section. "Two Pairs" and "Full House" must have different numbers so that  the combination 15566 will score 32 as "Two Pairs", but 15555 will score nothing in that category. Differences from Yahtzee. Yahtzee rules and scoring categories are somewhat different from Yamb: