+/// RootMove::extract_ponder_from_tt() is called in case we have no ponder move before
+/// exiting the search, for instance in case we stop the search during a fail high at
+/// root. We try hard to have a ponder move to return to the GUI, otherwise in case of
+/// 'ponder on' we have nothing to think on.
+
+Move RootMove::extract_ponder_from_tt(Position& pos)
+{
+ StateInfo st;
+ bool found;
+
+ assert(pv.size() == 1);
+
+ pos.do_move(pv[0], st);
+ TTEntry* tte = TT.probe(pos.key(), found);
+ Move m = found ? tte->move() : MOVE_NONE;
+ if (!MoveList<LEGAL>(pos).contains(m))
+ m = MOVE_NONE;
+
+ pos.undo_move(pv[0]);
+ pv.push_back(m);
+ return m;
+}
+
+