X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovepick.h;h=93061ee6fc6a81c8aaf277b817dab41a0d02dd34;hp=572025f20e0edb936f8dba3b7df4eb74dc2013cf;hb=a518d5d3adf0709471be906fd03ee4744477a214;hpb=4064ee540649cb46ad4cc4a6080bd4ef41314cb9
diff --git a/src/movepick.h b/src/movepick.h
index 572025f2..93061ee6 100644
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -17,7 +17,7 @@
along with this program. If not, see .
*/
-#if !defined MOVEPICK_H_INCLUDED
+#ifndef MOVEPICK_H_INCLUDED
#define MOVEPICK_H_INCLUDED
#include // For std::max
@@ -30,14 +30,13 @@
/// The Stats struct stores moves statistics. According to the template parameter
-/// the class can store History, Gains and Countermoves. History records how often
+/// the class can store History and Countermoves. History records how often
/// different moves have been successful or unsuccessful during the current search
-/// and is used for reduction and move ordering decisions. Gains records the move's
-/// best evaluation gain from one ply to the next and is used for pruning decisions.
+/// and is used for reduction and move ordering decisions.
/// Countermoves store the move that refute a previous one. Entries are stored
/// according only to moving piece and destination square, hence two moves with
/// different origin but same destination and piece will be considered identical.
-template
+template
struct Stats {
static const Value Max = Value(2000);
@@ -56,10 +55,7 @@ struct Stats {
void update(Piece p, Square to, Value v) {
- if (Gain)
- table[p][to] = std::max(v, table[p][to] - 1);
-
- else if (abs(table[p][to] + v) < Max)
+ if (abs(table[p][to] + v) < Max)
table[p][to] += v;
}
@@ -67,9 +63,8 @@ private:
T table[PIECE_NB][SQUARE_NB];
};
-typedef Stats< true, Value> GainsStats;
-typedef Stats HistoryStats;
-typedef Stats > CountermovesStats;
+typedef Stats HistoryStats;
+typedef Stats > CountermovesStats;
/// MovePicker class is used to pick one pseudo legal move at a time from the
@@ -107,4 +102,4 @@ private:
ExtMove moves[MAX_MOVES];
};
-#endif // !defined(MOVEPICK_H_INCLUDED)
+#endif // #ifndef MOVEPICK_H_INCLUDED