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-...
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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KAMISADO
Kamisado is an abstract strategy board game for two players that's played on an 8x8 multicoloured board. Each player controls a set of eight octagonal...
Kamisado is an abstract strategy board game for two players that's played on an 8x8 multicoloured board. Each player controls a set of eight octagonal dragon tower pieces. Each player's set of dragon towers contains a tower to match each of the colours that appear on the squares of the board (i.e., a brown tower, a green tower, etc.). One player's towers have gold dragons mounted on the top, while the other player's towers are topped with black dragons.
In an interview, designer Peter Burley said that the design of Kamisado dated back to a chance observation in a men's room in the 1970s. "I noticed that the floor had an interesting pattern of small colored tiles", he said. "I mentally made a note that this could possibly be used as a basis for a board game – this is something that I do quite a lot, whenever I see something a bit different. It must have made a deep impression on this occasion, however, because that night I had a vivid dream involving this tile pattern, and somehow the notion of 'whatever colour you land on, your opponent must move a piece that matches this'. I guess my subconscious mind had been working on this and sorted it out while I was asleep."
The players’ towers start the game on the row nearest to them. The players take turns moving one tower any number of spaces in a straight line, either directly forwards or diagonally forwards, but not into or through a square already containing another dragon tower.
The player with the black dragons moves first and may choose any tower. From this point onwards, each player must move the dragon tower that matches the colour of the square that the opponent's last move finished on. The object of the game is to reach your opponent's Home Row with one of your dragon towers. The first player to achieve this goal is the winner of the round.
Games may be played as single rounds, or as more advanced ‘Match’ formats. Matches are played up to 3 points (Standard Match), 7 points (Long Match) or 15 points (Marathon Match). During a match, each time a round is won, a special ‘Sumo Ring’ is added to the dragon tower that has fought its way through to the opponent's Home Row. The sumo rings provide the scoring system for the game, and also endow special powers to the dragon towers that carry them. These towers are known as Sumo towers and have the ability to push opponent's towers back one space, by using a move known as a ‘Sumo Push’.
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