The following levels have a variable difficulty. This category is reserved for those levels whose difficulty vary enormously with have a significant risk of being at least very hard. It is often based on initial outcome of the board. This is a rare difficulty level.

These are the typical features of variable levels:

  • Initial outcome of the board is enough to completely affect the difficulty of completing.
  • There is at least one particular outcome or set of outcomes that can make a level extremely hard or even impossible solely due to random chance (>30%). However, you also have a reasonable chance of getting an outcome that represents a difficulty of only medium or lower.
  • The difficulty responses vary enormously, with a reasonable proportion rating it extremely hard, while the others rating it only medium or even easy.