CONNECT FOUR VS GIPF

Connect Four (also known as Four Up, Plot Four, Find Four, Captain's Mistress, Four in a Row, Drop Four, and Gravitrips in the Soviet Union) is a two-player connection board game, in which the players choose a color and then take turns dropping colored discs into a seven-column, six-row vertically suspended grid. The pieces fall straight down, occupying the lowest available space within the column. The objective of the game is to be the first to form a horizontal, vertical, or diagonal line of four of one's own discs. Connect Four is a solved game. The first player can always win by playing the right moves. The game was first sold under the Connect Four trademark by Milton Bradley in February 1974. Connect Four is a two-player game with perfect information for both sides. This term describes games where one player at a time plays, players have all the information about moves that have taken place and all moves that can take place, for a given game state. Connect Four also belongs to the classification of an adversarial, zero-sum game, since a player's advantage is an opponent's disadvantage. One measure of complexity of the Connect Four game is the number of possible games board positions. For classic Connect Four played on 6 high, 7 wide grid, there are 4,531,985,219,092 positions for all game boards populated with 0 to 42 pieces. The game was first solved by James Dow Allen (October 1, 1988), and independently by Victor Allis (October 16, 1988).

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GIPF is an abstract strategy board game by Kris Burm, the first of six games in his series of games called the GIPF Project. GIPF was recommended by Spiel des Jahres in 1998. Players take turns pushing tokens (one player taking black, the other white) from the edge of the tri-gridded, hexagonal board, with pieces already in play pushed in front of the new placements rather than allowing more than one piece on any space. The game is lost if a player has no more tokens to play, and since each starts with a set number of tokens, it is clearly necessary to recycle pieces already positioned to keep playing. This is achieved by contriving to line up four pieces of the same colour in a row on the board, at which point those tokens are returned to their owner, and any opposing tokens extending from the line of four are captured. Because a single player will often move several pieces and change numerous on-board relationships, it is remarkably difficult to predict the state of the board more than one turn ahead, despite GIPF being a game of perfect information. Play tends to be highly fluid and there is no real concept of long term territorial or spatial development. The game can be expanded with extra pieces (available separately) called Potentials, which allow different kinds of moves to be made. These are named for the other games in the GIPF Project, though the other games are not actually necessary in order to utilise the Potentials named after them.

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