Puzzle 15 - Version 4.7 The game Soviet Puzzle 15 is a computerized rendering of a Soviet-era child's puzzle, one of the most popular in the world. This game fosters creativity and boosts cognitive functions. There are three modes to improve recognizing of numbers, symbols and images. The boards fully replicate the historical analogues.The game Soviet Puzzle 15 is a computerized rendering of a Soviet-era child's puzzle, one of the most popular in the world. This game fosters creativity and boosts cognitive functions. There are three modes to improve recognizing of numbers, symbols and images. The boards fully replicate the historical analogues.The game Soviet Puzzle 15 is a computerized rendering of a Soviet-era child's puzzle, one of the most popular in the world. This game fosters creativity and boosts cognitive functions. There are three modes to improve recognizing of numbers, symbols and images. The boards fully replicate the historical analogues.The game Soviet Puzzle 15 is a computerized rendering of a Soviet-era child's puzzle, one of the most popular in the world. This game fosters creativity and