X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=61475a2f3f3be641fc19b2222d5665cc85d1f214;hp=dbbfa022a8920f246f42ed417dca591edc621f50;hb=cd4604b05c2d61928b26ab50c5864c36ef1d3785;hpb=e6863f46de3eea91a1093465959f1acd75d6d02c

diff --git a/src/search.cpp b/src/search.cpp
index dbbfa022..61475a2f 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1126,6 +1126,7 @@ namespace {
       // Make and search the move
       StateInfo st;
       pos.do_move(move, st, dcCandidates);
+      TT.prefetch(pos.get_key());
 
       if (moveCount == 1) // The first move in list is the PV
           value = -search_pv(pos, ss, -beta, -alpha, newDepth, ply+1, threadID);
@@ -1296,6 +1297,8 @@ namespace {
 
         StateInfo st;
         pos.do_null_move(st);
+        TT.prefetch(pos.get_key());
+
         int R = (depth >= 5 * OnePly ? 4 : 3); // Null move dynamic reduction
 
         Value nullValue = -search(pos, ss, -(beta-1), depth-R*OnePly, ply+1, false, threadID);
@@ -1410,6 +1413,7 @@ namespace {
       // Make and search the move
       StateInfo st;
       pos.do_move(move, st, dcCandidates);
+      TT.prefetch(pos.get_key());
 
       // Try to reduce non-pv search depth by one ply if move seems not problematic,
       // if the move fails high will be re-searched at full depth.
@@ -1619,6 +1623,7 @@ namespace {
       // Make and search the move.
       StateInfo st;
       pos.do_move(move, st, dcCandidates);
+      TT.prefetch(pos.get_key());
       Value value = -qsearch(pos, ss, -beta, -alpha, depth-OnePly, ply+1, threadID);
       pos.undo_move(move);