Bitcoin cash supporters have been discussing a new type of lottery system that uses the BCH chain to operate in a transparent fashion. Nakamoto Game was announced on March 6 and allows anyone to participate without registration. Basically, a user chooses to send a bet for 0.01 BCH or to place multiple bets by using the scannable QR code. The last alphanumeric digit of the transaction ID (TxID) that the user generated by sending BCH is their lucky number. The system uses a block height every three days which requires 400 blocks to find out the winner of each round.
So far there's been a bunch of jackpots given away to random players and users can see the reward distribution on the website. The jackpots can vary in size and the current prize that will be rewarded in two days at block height 573,329 is approximately 1.92 BCH ($256). When the user's lucky number (TxID) matches the last alphanumeric digits within the hash of block 573,329, the user wins that round. If no lucky number is found within the target block's hash then the round rolls over into a new one. The creators of Nakamoto Game announced the lottery system on r/btc and the BCH community seems to like the idea.