I analyzed the 2POW protocol.
In the early days, everyone used CPU mining, as the more nodes, the higher the luck value.
However, since some time, some GPUs have participated in mining, and the power has increased by about 1000 times. The CPU can no longer mined blocks at all, and luck is not so important. Because in the design of 2POW, there is a basic assumption that when the power of all nodes is almost equal, blocks are mined by luck. However, GPU has a performance advantage of 1000 times compared with CPU, this is equivalent to only a few scattered GPUs in the system mining blocks.
Although the system has been monopolized by several GPU miners, I believe that as the number of GPUs increases, the importance of luck will come.