X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fposition.cpp;h=db4c857b0d25401cf97e3f70b56c8aeb10a46ee1;hp=7b345fd9c9c731515a46490fe1768d3687f134b6;hb=880e3cd7c82c82776e85042c849e884811378e21;hpb=223ebe7b4019c4b85b0f7f43b4dae534932d2287

diff --git a/src/position.cpp b/src/position.cpp
index 7b345fd9..db4c857b 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -25,12 +25,12 @@
 
 #include "bitcount.h"
 #include "movegen.h"
-#include "notation.h"
 #include "position.h"
 #include "psqtab.h"
 #include "rkiss.h"
 #include "thread.h"
 #include "tt.h"
+#include "notation.h"
 
 using std::string;
 
@@ -226,7 +226,7 @@ void Position::set(const string& fenStr, bool isChess960, Thread* th) {
       incremented after Black's move.
 */
 
-  char col, row, token;
+  unsigned char col, row, token;
   size_t idx;
   Square sq = SQ_A8;
   std::istringstream ss(fenStr);
@@ -297,7 +297,7 @@ void Position::set(const string& fenStr, bool isChess960, Thread* th) {
 
   // Convert from fullmove starting from 1 to ply starting from 0,
   // handle also common incorrect FEN with fullmove = 0.
-  gamePly = std::max(2 * (gamePly - 1), 0) + int(sideToMove == BLACK);
+  gamePly = std::max(2 * (gamePly - 1), 0) + (sideToMove == BLACK);
 
   chess960 = isChess960;
   thisThread = th;
@@ -424,23 +424,18 @@ const string Position::fen() const {
       ss << '-';
 
   ss << (ep_square() == SQ_NONE ? " - " : " " + to_string(ep_square()) + " ")
-     << st->rule50 << " " << 1 + (gamePly - int(sideToMove == BLACK)) / 2;
+     << st->rule50 << " " << 1 + (gamePly - (sideToMove == BLACK)) / 2;
 
   return ss.str();
 }
 
 
-/// Position::pretty() returns an ASCII representation of the position to be
-/// printed to the standard output together with the move's san notation.
+/// Position::pretty() returns an ASCII representation of the position
 
-const string Position::pretty(Move m) const {
+const string Position::pretty() const {
 
   std::ostringstream ss;
 
-  if (m)
-      ss << "\nMove: " << (sideToMove == BLACK ? ".." : "")
-         << move_to_san(*const_cast<Position*>(this), m);
-
   ss << "\n +---+---+---+---+---+---+---+---+\n";
 
   for (Rank r = RANK_8; r >= RANK_1; --r)
@@ -457,14 +452,23 @@ const string Position::pretty(Move m) const {
   for (Bitboard b = checkers(); b; )
       ss << to_string(pop_lsb(&b)) << " ";
 
-  ss << "\nLegal moves: ";
-  for (MoveList<LEGAL> it(*this); *it; ++it)
-      ss << move_to_san(*const_cast<Position*>(this), *it) << " ";
-
   return ss.str();
 }
 
 
+/// Position::game_phase() calculates the game phase interpolating total non-pawn
+/// material between endgame and midgame limits.
+
+Phase Position::game_phase() const {
+
+  Value npm = st->npMaterial[WHITE] + st->npMaterial[BLACK];
+
+  npm = std::max(EndgameLimit, std::min(npm, MidgameLimit));
+
+  return Phase(((npm - EndgameLimit) * 128) / (MidgameLimit - EndgameLimit));
+}
+
+
 /// Position::check_blockers() returns a bitboard of all the pieces with color
 /// 'c' that are blocking check on the king with color 'kingColor'. A piece
 /// blocks a check if removing that piece from the board would result in a
@@ -821,7 +825,7 @@ void Position::do_move(Move m, StateInfo& newSt, const CheckInfo& ci, bool moveI
           k ^= Zobrist::enpassant[file_of(st->epSquare)];
       }
 
-      if (type_of(m) == PROMOTION)
+      else if (type_of(m) == PROMOTION)
       {
           PieceType promotion = promotion_type(m);
 
@@ -1113,10 +1117,6 @@ Value Position::see(Move m) const {
 
 bool Position::is_draw() const {
 
-  if (   !pieces(PAWN)
-      && (non_pawn_material(WHITE) + non_pawn_material(BLACK) <= BishopValueMg))
-      return true;
-
   if (st->rule50 > 99 && (!checkers() || MoveList<LEGAL>(*this).size()))
       return true;