Tetris (
Russian :
Те́трис) is a
puzzle video game originally designed and programmed by
Alexey Pajitnov in the
Soviet Union. It was released on June 6, 1984, while he was working for the
Dorodnicyn Computing Centre of the
Academy of Science of the USSR in
Moscow. He derived its name from the
Greek numerical prefix
tetra- (all of the game's pieces, known as
Tetrominoes, contain four segments) and
tennis, Pajitnov's favorite sport.
The
Tetris game is a popular use of
tetrominoes, the four element special case of
polyominoes. Polyominoes have been used in popular puzzles since at least 1907, and the name is given by the mathematician
Solomon W. Golomb in 1953. However, even the enumeration of pentominoes is dated to antiquity.
A random sequence of
tetrominoes (sometimes called "tetrads" in older versions)—shapes composed of four square blocks each—fall down the playing field (a rectangular vertical shaft, called the "well" or "matrix").
The objective of the game is to manipulate these tetrominoes, by moving each one sideways and rotating it by 90 degree units, with the
aim of creating a horizontal line of blocks without gaps.
When such a line is created, it disappears, and any block above the deleted line will fall. With every ten lines that are cleared, the game enters a new level. As the game progresses, each level causes the tetrominoes to fall faster, and the game ends when the stack of tetrominoes reaches the top of the playing field and no new tetrominoes are able to enter. In certain versions, the game can also end if the player is able to get all the way to level 15
Tetris Apartments is an innovative project completed by slovenian architects
Ofis in
Ljubljana. As you can see from these pictures these apartments are inspired by the well known game named Tetris. The building stands on the edge of the 650 apartments development which was finished year ago. By urban rules the block is 3 floors high and 65 meters long. Since the orientation of the apartments is towards the car road the apartment areas together with balconies are orientated to the quieter south side.