gistfile1.txt

bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
cccccccccccccccccccccccccccccccccccccccccccccccccccccccc

  figure 1.  proof-of-work blockchain, with computational work marked as
             'c'.




bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
                                                ssssssss

  figure 2.  proof-of-stack blockchain, with active stakers marked as 's'.
             previous stakers have cashed out.




                           s
                           s
                           s
                           s
                           s
                           s
                           s
                           s
                           s
                           .
                          ...
                   ................
             .............................
    ...............................................
........................................................
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

  figure 3.  proof-of-stack blockchain, with active stakers being on the
             roof of the merkle tree (marked as 's').




                           .
                          ...
                   sssssssss.......
             ..s................s......s..
    ...............................................
.....................s.................................
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

  figure 4.  proof-of-stack blockchain, with active stakers being on all
             over the merkle tree (marked as 's').