DroidFish: Updated Stockfish engine to version 2.1.1.

DroidFish/jni/stockfish/book.cpp

@@ -502,6 +502,18 @@ int Book::find_entry(uint64_t key) {
 }
 
 
+/// Book::get_number() reads sizeof(T) chars from the file's binary byte
+/// stream and converts them in a number of type T.
+template<typename T>
+void Book::get_number(T& n) {
+
+  n = 0;
+
+  for (size_t i = 0; i < sizeof(T); i++)
+      n = (n << 8) + (T)bookFile.get();
+}
+
+
 /// Book::read_entry() takes an integer index, and returns the BookEntry
 /// at the given index in the book file.
 
@@ -514,7 +526,10 @@ BookEntry Book::read_entry(int idx) {
 
   bookFile.seekg(idx * sizeof(BookEntry), ios_base::beg);
 
-  *this >> e.key >> e.move >> e.count >> e.learn;
+  get_number(e.key);
+  get_number(e.move);
+  get_number(e.count);
+  get_number(e.learn);
 
   if (!bookFile.good())
   {

DroidFish/jni/stockfish/book.h

@@ -48,12 +48,7 @@ public:
   const std::string name() const { return bookName; }
 
 private:
-  // read n chars from the file stream and converts them in an
+  template<typename T> void get_number(T& n);
-  // integer number. Integers are stored with highest byte first.
-  template<int n> uint64_t get_int();
-
-  template<typename T>
-  Book& operator>>(T& n) { n = (T)get_int<sizeof(T)>(); return *this; }
 
   BookEntry read_entry(int idx);
   int find_entry(uint64_t key);
@@ -64,8 +59,4 @@ private:
   RKISS RKiss;
 };
 
-// Yes, we indulge a bit here ;-)
-template<int n> inline uint64_t Book::get_int() { return 256 * get_int<n-1>() + bookFile.get(); }
-template<> inline uint64_t Book::get_int<1>() { return bookFile.get(); }
-
 #endif // !defined(BOOK_H_INCLUDED)

DroidFish/jni/stockfish/evaluate.cpp

@@ -142,9 +142,9 @@ namespace {
     { S(0, 0), S(15, 39), S(15, 39), S(15, 39), S(15, 39), S( 0,  0) }  // QUEEN
   };
 
-  // ThreatedByPawnPenalty[PieceType] contains a penalty according to which
+  // ThreatenedByPawnPenalty[PieceType] contains a penalty according to which
   // piece type is attacked by an enemy pawn.
-  const Score ThreatedByPawnPenalty[] = {
+  const Score ThreatenedByPawnPenalty[] = {
     S(0, 0), S(0, 0), S(56, 70), S(56, 70), S(76, 99), S(86, 118)
   };
 
@@ -524,7 +524,7 @@ namespace {
         // Decrease score if we are attacked by an enemy pawn. Remaining part
         // of threat evaluation must be done later when we have full attack info.
         if (bit_is_set(ei.attackedBy[Them][PAWN], s))
-            score -= ThreatedByPawnPenalty[Piece];
+            score -= ThreatenedByPawnPenalty[Piece];
 
         // Bishop and knight outposts squares
         if ((Piece == BISHOP || Piece == KNIGHT) && pos.square_is_weak(s, Us))

DroidFish/jni/stockfish/misc.cpp

@@ -54,7 +54,7 @@ using namespace std;
 /// current date (in the format YYMMDD) is used as a version number.
 
 static const string AppName = "Stockfish";
-static const string EngineVersion = "2.1";
+static const string EngineVersion = "2.1.1";
 static const string AppTag  = "";
 
 

DroidFish/jni/stockfish/search.cpp

@@ -1068,7 +1068,6 @@ split_point_start: // At split points actual search starts from here
               ss->reduction = reduction<PvNode>(depth, moveCount);
               if (ss->reduction)
               {
-                  alpha = SpNode ? sp->alpha : alpha;
                   Depth d = newDepth - ss->reduction;
                   value = -search<NonPV>(pos, ss+1, -(alpha+1), -alpha, d);