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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SUGOROKU
Sugoroku (雙六 or 双六) (literally 'double six') refers to two different forms of a Japanese board game: ban-sugoroku (盤双六, 'board-sugoroku') which...
Sugoroku (雙六 or 双六) (literally 'double six') refers to two different forms of a Japanese board game: ban-sugoroku (盤双六, 'board-sugoroku') which is similar to western backgammon, and e-sugoroku (絵双六, 'picture-sugoroku') which is similar to western Snakes and Ladders.
The game is thought to have been introduced from China (where it was known as Shuanglu) into Japan in the sixth century.
It is known that in the centuries following the game's introduction into Japan it was made illegal several times, most prominently in 689 and 754. This is because the simple and luck-based nature of sugoroku made it an ideal gambling game. This version of sugoroku and records of playing for gambling continuously appeared until early Edo era. In early Edo-era, a new and quick gambling game called Chō-han (丁半) appeared and using sugoroku for gambling quickly dwindled.
This variant of the backgammon family has died out in Japan and most other countries, with the Western style modern backgammon (with doubling-cube) having some avid players.
A simpler e-sugoroku, with rules similar to snakes and ladders, appeared as early as late 13th century and was made popular due to the cheap and elaborate wooden block printing technology of the Edo period. Thousands of variations of boards were made with pictures and themes from religion, political, actors, and even adult material. In the Meiji and later periods, this variation of the game remained popular and was often included in child-oriented magazines. With ban-sugoroku being obsolete, today the word sugoroku almost always means e-sugoroku.
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