BitCoin Gold is a fork from Bitcoin, idealized over the prevailing impression that miners had too much power on its ecosystem. Therefore, it has the equihash protocol implemented on its proof-of-work algorithm.
Equihash decentralizes mining, balancing the difficulty of the hashcash puzzles needed to be solved for creating a block to be proportional to how much RAM the device has, making it profitable to mine using common CPUs, which will have just the same level of decision over a block as aShow more [+] dicated device (ASIC) has.
Besides being resistant to devices built dedicated to mining, Bitcoin Gold blockchain is almost identical to Bitcoin's.