diff --git a/gnugo/interface/main.c b/gnugo/interface/main.c
index 2a8b00d..7711e43 100644
--- a/gnugo/interface/main.c
+++ b/gnugo/interface/main.c
@@ -250,7 +250,7 @@ gnugo_analyze_dragon_status(int* moves, uint8_t* critical)
   }
 
   genmove(gameinfo.to_move, NULL, NULL);
-
+
   for (int pos = BOARDMIN; pos < BOARDMAX; pos++) {
     color = board[pos];
     if (!IS_STONE(color))
@@ -275,12 +275,14 @@ gnugo_analyze_dragon_status(int* moves, uint8_t* critical)
     size = dragon[dragon2[d].origin].size;
     enum dragon_status safety = dragon2[d].safety;
 
+    /*
     if (is_worm_origin(pos, pos)) {
       gprintf("\nanalyzing %C %1m size:%d\n", color, dragon2[d].origin, size);
       gprintf("status=%s, safety=%s -> %d\n",
         snames[dragon2[d].owl_status], snames[safety],
         safety_map[safety]);
     }
+    */
 
     int x = J(pos);
     int y = I(pos);
diff --git a/src/UctSearch.cpp b/src/UctSearch.cpp
index b6bbba3..2680f10 100644
--- a/src/UctSearch.cpp
+++ b/src/UctSearch.cpp
@@ -1506,7 +1506,7 @@ ParallelUctSearch( thread_arg_t *arg )
 
   CheckSeki(targ->game, seki);
 #if 1
-  if (threads == 1 || threads > 1 && targ->thread_id == 1) {
+  if (targ->game->moves > pure_board_size * 3 - 17 && (threads == 1 || threads > 1 && targ->thread_id == 1)) {
     auto req = CreateGnugoReq(targ->game);
     req->tree_depth = 1;
     req->gnugo_depth = 1;
@@ -1728,6 +1728,7 @@ UctSearch(game_info_t *game, int color, mt19937_64 *mt, LGR& lgrf, LGRContext& l
     game->record[game->moves - 2].pos == PASS;
 #if 1
   if (uct_child[next_index].move_count > 1000
+    && game->moves > pure_board_size * 3 - 17
     && uct_child[next_index].move_count % 100 == 0
     && atomic_compare_exchange_strong(&uct_child[next_index].eval_gnugo, &expected, true)) {
     LOCK_EXPAND;