Rubik Challenge offers from 2x2x2 to 9x9x9 Rubik's cubes with scrambling code.The scrambling code allows you to compete with your opponents in a fair way the same code and the cube scrambles exactly the same way. The scrambling code is a 5 digit Hexadecimal number.But zero number is also valid. For example, 00000 is a valid code. The code determined randomly by the application is 4 digits. However, the user can enter a code himself, if the wrong code is entered, the application indicates that the code is wrong and asks whether a random code is requested. If no code is entered, the application scrambles the cube with a random code and the code appears in the lower right corner.Clicking the link you send with the share button, the cube will automatically scrambles in the same way as yours.