X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftt.cpp;h=0b4a59de55915962e7ed9409ae462be2556366f3;hp=b8fe7567c569a6a3d633c2d9b086fcd39fafd96d;hb=384bff4264f199ded8fa28d241ce0e7dc021a97c;hpb=893a08a8c2eac3c2e7d2216b51811cc7378e2239

diff --git a/src/tt.cpp b/src/tt.cpp
index b8fe7567..0b4a59de 100644
--- a/src/tt.cpp
+++ b/src/tt.cpp
@@ -2,7 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
-  Copyright (C) 2015-2019 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2020 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -35,23 +35,22 @@ TranspositionTable TT; // Our global transposition table
 
 void TTEntry::save(Key k, Value v, bool pv, Bound b, Depth d, Move m, Value ev) {
 
-  assert(d / ONE_PLY * ONE_PLY == d);
-
   // Preserve any existing move for the same position
   if (m || (k >> 48) != key16)
       move16 = (uint16_t)m;
 
   // Overwrite less valuable entries
   if (  (k >> 48) != key16
-      || d / ONE_PLY + 10 > depth8
+      || d - DEPTH_OFFSET > depth8 - 4
       || b == BOUND_EXACT)
   {
+      assert(d >= DEPTH_OFFSET);
+
       key16     = (uint16_t)(k >> 48);
       value16   = (int16_t)v;
       eval16    = (int16_t)ev;
       genBound8 = (uint8_t)(TT.generation8 | uint8_t(pv) << 2 | b);
-      assert((d - DEPTH_NONE) / ONE_PLY >= 0);
-      depth8    = (uint8_t)((d - DEPTH_NONE) / ONE_PLY);
+      depth8    = (uint8_t)(d - DEPTH_OFFSET);
   }
 }