C#

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Visit( target )
{
  this.Visited = true;

  if this == target
    You've found a route through!
    exit
  endif
  

  for each of the 6 neighbour
    if neighbour.visited == false 
      if neighbour.filled == false 
        neighbour.Visit( target )
      endif
    endif
  endfor

}

else if ((AmIPartOfTheWay(cubeaboveme) || AmIPartOfTheWay (cubeleftofme) || 
....... (for each cube, just not the one I came from) )
return true;

using System;
using System.DirectoryServices;
using System.Runtime.InteropServices;
 
public sealed class AdsiUtils
{
    private AdsiUtils() {}
    
    [
        ComImport,
        Guid("9068270b-0939-11d1-8be1-00c04fd8d503"),
        InterfaceType(ComInterfaceType.InterfaceIsIDispatch)
    ]
    private interface IADsLargeInteger
    {
        [DispId(2)] int HighPart { get; set; }
        [DispId(3)] int LowPart { get; set; }
    }
    
    public static DateTime AdsDateValue(object value)
    {
        try
        {
            IADsLargeInteger v = value as IADsLargeInteger;
            if (null == v) return DateTime.MinValue;
            
            long dV = ((long)v.HighPart << 32) + (long)v.LowPart;
            return DateTime.FromFileTime(dV);
        }
        catch
        {
            return DateTime.MinValue;
        }
    }
}

IADsLargeInteger v = value as IADsLargeInteger;