X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Ftt.h;h=76ecad81e101254dea4832984f2022dd9e2055da;hp=02913efe7f66f0bd1a162de084bdbf1b54cb4a38;hb=72c7595f8ac72c7831ee319b8b0bc46404c5fc27;hpb=5a0581498cde3d0904924d8ef7ed25ea1a2c855a

diff --git a/src/tt.h b/src/tt.h
index 02913efe..76ecad81 100644
--- a/src/tt.h
+++ b/src/tt.h
@@ -34,7 +34,21 @@
 //// Types
 ////
 
-/// The TTEntry class is the class of transposition table entries.
+/// The TTEntry class is the class of transposition table entries
+///
+/// A TTEntry needs 128 bits to be stored
+///
+/// bit    0-63: key
+/// bit   64-95: data
+/// bit  96-111: value
+/// bit 112-127: depth
+///
+/// the 32 bits of the data field are so defined
+///
+/// bit  0-16: move
+/// bit 17-19: not used
+/// bit 20-22: value type
+/// bit 23-31: generation
 
 class TTEntry {
 
@@ -43,7 +57,7 @@ public:
   TTEntry(Key k, Value v, ValueType t, Depth d, Move m, int generation);
   Key key() const { return key_; }
   Depth depth() const { return Depth(depth_); }
-  Move move() const { return Move(data & 0x7FFFF); }
+  Move move() const { return Move(data & 0x1FFFF); }
   Value value() const { return Value(value_); }
   ValueType type() const { return ValueType((data >> 20) & 7); }
   int generation() const { return (data >> 23); }