public override IEnumerable <IState> Successors()
{
var newColor = (_color + 1) % Colors;
// ReSharper disable once ImpureMethodCallOnReadonlyValueField
return(_location.Neighbors().
Where(loc => !_solver._isBlocked[loc.Row][loc.Col]).
Select(loc => new MonocycleState(newColor, loc, NewDirection(_location, loc), _solver)));
}
public IEnumerable <IState> Successors()
{
return(_location.Neighbors()
.Where(IsClear)
.Select(l => new Position(l)));
}