Tetris

TETRIS

Tetris is a game of logic and reasoning created by Alexey Pažitnov while working for the Russian Academy of Sciences of Moscow. On 6 June 1984 Pažitnov completed the first playable version. The following year was made a version for IBM by Vadim Gerasimov and 1988 Tetris became the best-selling American computer game.

The Tetris name derives from the Greek word "tetra" which means "four" because the "bricks" that make up the game are formed at most by four pieces. These, combined with other bricks (with at least one side entire joint) make seven possible figures each of which takes its name from the following letters of the alphabet: I, J, L, O, S, T, Z, which looks like form.
The game consists in rotating and moving these figures so that you fit them, without spaces, in order to achieve a whole line of blocks. Each completed new line is immediately deleted to make room for other figures, so that the bricks don’t pile up. When you accumulate incomplete lines, the game becomes more difficult.
Adding to this difficulty the time factor, the Tetris success was world-wide.
Today Tetris, thanks to the creation of versions for mobile phones and smartphones, maintains its popularity.

From a mathematical point of view the Tetris was object of studies through which it could demonstrate that the game concludes in some way with the defeat of the player, because in the random alternating figures certainly occur, sooner or later, the sequential appearance of S and T figures that will lead to the inevitable defeat.