anchor.diff:  This move selector does not support <<cacheType,phase or solver caching>>.
   
   [[subChainChangeMoveSelector]]
  -=== SubChainChangeMoveSelector (chained variables only)
  +==== SubChainChangeMoveSelector
   
   A _subChain_ is a set of planning entities with a chained planning variable which form part of a chain.
   The `subChainChangeMoveSelector` selects a subChain and moves it to another place (in a different or the same anchor chain).
  
positive.code:     </pillarChangeMoveSelector>
  ----
  
  A sub pillar is a subset of entities that share the same value(s) for their variable(s). For example if queen A, B, C and D are all located on row 0, they are a pillar and `[A, D]` is one of the many sub pillars.
  If `subPillarEnabled` (defaults to ``true``) is false, no sub pillars are selected.
  If sub pillars are enabled, the pillar itself is also included and the properties `minimumSubPillarSize` (defaults to ``1``) and `maximumSubPillarSize` (defaults to ``infinity``) limit the size of the selected (sub) pillar.
  
  [NOTE]
  ====
  The number of sub pillars of a pillar is exponential to the size of the pillar.
  For example a pillar of size 32 has `(2^32 - 1)` subpillars.
  Therefore a `pillarSelector` only supports <<justInTimeRandomSelection,JIT random selection>> (which is the default).
  ====
  
  The other properties are explained in <<changeMoveSelector,changeMoveSelector>>.
  This move selector does not support <<cacheType,phase or solver caching>>
  
negative.code: [source,xml,options="nowrap"]
  ----
      <pillarChangeMoveSelector>
        <subPillarType>SEQUENCE</subPillarType>
        <subPillarSequenceComparatorClass>...</subPillarSequenceComparatorClass>
        ... <!-- Normal selector properties -->
        <pillarSelector>
          <entitySelector>
            <entityClass>...Lecture</entityClass>
            ...
          </entitySelector>
          <minimumSubPillarSize>1</minimumSubPillarSize>
          <maximumSubPillarSize>1000</maximumSubPillarSize>
        </pillarSelector>
  