* @param diff nehézségi szint, értékei: {@link ITable#DIFFICULTY_EASY},{@link ITable#DIFFICULTY_MEDIUM},
* {@link ITable#DIFFICULTY_HARD}
* @return Üres skeleton, bal és felső sor fekete
* */
protected ISkeletonTable getNewSkeleton(final int i, final int j, final int diff) {
return new ISkeletonTable() {
public int getColumnCount() { return i; }
public int getRowCount() { return j; }
public int getDifficulty() { return diff; }
public int getType(kakuro.table.Position p) {
return ((p.x==0 || p.y==0)?ISkeletonTable.CELL_BLACK:ISkeletonTable.CELL_WHITE);