X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftt.h;h=677f38edc84e1cc0a28954168629dad09f589c6c;hp=d411ffa867089da315be62167b7d0113bfc00a70;hb=01ee509a5c33e11d7d62d2f325f55720d8be9cfb;hpb=d4af15f682c1967450233ab62cba1a6c5d601df6

diff --git a/src/tt.h b/src/tt.h
index d411ffa8..677f38ed 100644
--- a/src/tt.h
+++ b/src/tt.h
@@ -39,18 +39,20 @@ struct TTEntry {
   Move  move()  const { return (Move )move16; }
   Value value() const { return (Value)value16; }
   Value eval()  const { return (Value)eval16; }
-  Depth depth() const { return (Depth)depth8; }
+  Depth depth() const { return (Depth)(depth8 * int(ONE_PLY)); }
   Bound bound() const { return (Bound)(genBound8 & 0x3); }
 
   void save(Key k, Value v, Bound b, Depth d, Move m, Value ev, uint8_t g) {
 
+    assert(d / ONE_PLY * ONE_PLY == d);
+
     // Preserve any existing move for the same position
     if (m || (k >> 48) != key16)
         move16 = (uint16_t)m;
 
     // Don't overwrite more valuable entries
     if (  (k >> 48) != key16
-        || d > depth8 - 2
+        || d / ONE_PLY > depth8 - 4
      /* || g != (genBound8 & 0xFC) // Matching non-zero keys are already refreshed by probe() */
         || b == BOUND_EXACT)
     {
@@ -58,7 +60,7 @@ struct TTEntry {
         value16   = (int16_t)v;
         eval16    = (int16_t)ev;
         genBound8 = (uint8_t)(g | b);
-        depth8    = (int8_t)d;
+        depth8    = (int8_t)(d / ONE_PLY);
     }
   }