Wonderful World of Tetris
By now, I think everyone has heard of Tetris. The game was created by Alexey Pajitnov in 1985 while working for the Computer Centre in the Russian Academy of Science. The original game was programmed in Pascal and featured black and white graphics.
The following year, the game was released in the United States with color graphics. Alexey got the idea from a puzzle game called Pentomino (a board game with many blocks of different shapes that can fit together in only one way).
Tetrominoes fall from the top of the screen and you can rotate these pieces as they fall. The object is to make the falling piece "lock" in to the other tetrominoes that have already reached the bottom of the playfield.
The tetrominoes come in 7 different types: the I, J, L, O, S, T, and Z, with each tetrominoe approximating the shape of its letter. (for instance the I is simply a rectangle and the T tetrominoe looks like a capital t).
The playfield is actually divided up into a grid of rows and columns. The offical game specification calls for there to be 10 columns. Whenever a row is completely filled it is removed from the playfield, and all of the tetrominoes above drop down one row. And this is the goal of the game, to keep enough space in the playfield so all the remaining tetrominoes will fit. When there is no longer room for a tetrominoe to enter the playfield the game ends.
As with all popular games, this one has inspired countless game developers to make their own version. If you are interested in playing I recommend downloading this Tetris game called Brix Quest.
Tetris remains one of the most popular games of all time! And new versions of the game are released every year. Because of this, Alexey's company released a specification defining the elements of the game. This was done in an attempt to keep the basic feel and playability of the original game intact in all new versions released by other developers.
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