This is a test version running on the Ropsten testnet, read this on how to get Metamask, connect to Ropsten and get Ropsten ethers to play:
https://blog.bankex.org/how-to-buy-ethereum-using-metamask-ccea0703daecWin ether by simply guessing the smallest number nobody else thought of!
The point of this game is to guess the lowest unique number of a round. For example if the numbers in the round are: 1, 1, 3, 4, 6:
The Ethereum blockchain and therefore the the data and the transactions of an application built on it are readable by anyone. But in this game we need to hide the numbers guessed, so we had to employ a little trick: Encrypting the numbers with a passwod given by the player. Thats why we need a separate "send number" and "uncover number" phase in the game. When sending the encrypted number we also need to add a tiny decoy ether value to hide the actual transaction value which could be used to deduce the number.
The numbers of a round are first sumbitted with password encryption. After the given round ends (one round is one day by default) it's uncover phase starts which lasts for the same time. During the uncover round players have to uncover their numbers with the password they have given. At the end of the uncover phase the winner is determined, and they can claim their prize.
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