*/
private void updateNeighborStringsAfterMove(GoBoardPosition stone, GoBoardPositionSet nbrs) {
GoBoardPosition nbrStone = nbrs.getOneMember();
GoString str = (GoString) nbrStone.getString();
str.addMember( stone, getBoard() );
getAllGroups().debugPrint( 3, "groups before merging:", true, true);
if ( nbrs.size() > 1 ) {
mergeStringsIfNeeded(str, nbrs);
}