X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftt.cpp;h=a8aa1b6574604d48fb91a513a066e6dedbaec0ae;hp=a16d5cac636496888b9f7e506aad67902907b92c;hb=bc0871acbce42a02ae9bbbfb95529b0a49f7588a;hpb=fd2b3df77083ae60d9233023119d6d0a076070b9

diff --git a/src/tt.cpp b/src/tt.cpp
index a16d5cac..a8aa1b65 100644
--- a/src/tt.cpp
+++ b/src/tt.cpp
@@ -208,7 +208,9 @@ void TranspositionTable::insert_pv(const Position& pos, Move pv[]) {
 
   for (int i = 0; pv[i] != MOVE_NONE; i++)
   {
-      store(p.get_key(), VALUE_NONE, VALUE_TYPE_NONE, Depth(-127*OnePly), pv[i]);
+      TTEntry *tte = retrieve(p.get_key());
+      if (!tte || tte->move() != pv[i])
+          store(p.get_key(), VALUE_NONE, VALUE_TYPE_NONE, Depth(-127*OnePly), pv[i]);
       p.do_move(pv[i], st);
   }
 }
@@ -220,7 +222,7 @@ void TranspositionTable::insert_pv(const Position& pos, Move pv[]) {
 /// will often get single-move PVs when the search stops while failing high,
 /// and a single-move PV means that we don't have a ponder move.
 
-void TranspositionTable::extract_pv(const Position& pos, Move pv[], int pvSize) {
+void TranspositionTable::extract_pv(const Position& pos, Move pv[], const int PLY_MAX) {
 
   const TTEntry* tte;
   StateInfo st;
@@ -236,7 +238,7 @@ void TranspositionTable::extract_pv(const Position& pos, Move pv[], int pvSize)
          && tte->move() != MOVE_NONE
          && move_is_legal(p, tte->move())
          && (!p.is_draw() || ply < 2)
-         && ply < pvSize)
+         && ply < PLY_MAX)
   {
       pv[ply] = tte->move();
       p.do_move(pv[ply++], st);