Case battle

User has opportunity to purchase any number of cases without opening them and create battle with another user. Example: User №1 buys 5 cases, creates battle for them, and waits for user №2 to join battle. Winner is determined by amount of allocation knocked out and takes opponent's allocation. If user №1 receives $300X from 5 cases and user №2 receives $250X from same number of cases, then user №1 wins and takes $550X. Battles can be arranged between two, three, or four users.