Calvinball has some similarity to earlier Nomic. Even if all variants are solvable, for practical purposes, as someone states, we can buy all the time we want by Mutators, mixing back-rank like Alexandre and Fischer, drops or gates, moveable squares. [It turns out Aaron Alexandre, originator of idea that eventually led to what we now call FRC or Chess960, was one of hidden operators of Maelzel's automaton Turk around the 1820's.] Actually CVPage probably has 5000 Mutators and maybe 100 good ones. So deadend need not be deadend after all. Now how does any system evaluate 5000 Mutators? Can 1000 people evaluate 10,000 Mutators in reasonable time? Where are the minds set on the task? Probably instead, Chess needs to be handed down from above. Just before year 1500, likely only few dozens were playing in Northern Italy with the Queen ranging across the diagonals full-length, Pawns double-stepping etc., and that caught on, OrthoChess 64. If no one much plays CVPage games, even their inventors within own Game Courier, they may not have theoretical interest in evaluations. Equally important (and just saying the same thing differently) is practical aspect of getting respected piece-mixes or Mutators, and that is all but impossible without impartiality.