black chips. If a number is already covered, it still counts one of the five numbers. Points are scored by "closing a row," i.e. covering all numbers of a single color, covering a sequence of numbers or all numbers that repeat. A string corresponds to a score space, and therefore points for that player. All of a player's actions must be announced to both the scorekeeper and all other players; failure to do so might result in a player closing the same row and score those points. As mentioned earlier, only one player can use a score space. A player can also go for a bonus by attempting to roll the five dice and show different numbers. If the roll turns up sequential numbers, a Rainbow bonus is scored, doubling the total bonus points. The game ends when all rows are closed and scored. The scorekeeper totals all the points obtained by each player. The player with the highest score wins the game. Showdown Yahtzee Showdown Yahtzee, which appeared in 1991, is a board game which makes use of the concepts and scoring categories in Yahtzee. Its gameplay is divided into two parts: Placement Mode and Showdown Mode. Six dice are used in the game, five to form the combinations (the combination dice) and a differently-colored one to move a player's piece around the board (the movement die). In Placement Mode, players take turns moving their pieces around a sixteen-space game board clockwise. The object of this mode is to place twelve cards, one for the lower twelve of the thirteen combinations in standard Yahtzee. The Yahtzee combination is not among them, but such a combination has a special purpose to be explained later. When a player lands on a blank space, that player would roll the combination dice to establish a certain combination for that space. Once such a combination is established, a card corresponding to that combination is placed on the space and an appropriate number of chips is stacked on the card. Each chip is worth ten points. The chips also signify a player's control on that combination. When a player lands on a covered space with an established combination, the player's reaction depends on whose chips are on that space. If the chips are the player's own, one can reroll the movement die and go further or try to increase the chips on that space by