Planet Puzzle League

Planet Puzzle League

""Alexey Pajitnov was just 29 years old when he was working for the Soviet Academy of Sciences in 1984. In that year, on June 6, he completed development on the first edition of Tetris. Yes, the puzzle game that has invaded our dreams and is built using nothing more than seven unique shapes made up of four blocks (officially called tetrads or tetriminos) turns 25 years old today.""