X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fendgame.cpp;h=f1f29d61249371f9302d51d4c93ae3049489991d;hp=00c707267575d816c5c0d12750768b9fa9610038;hb=cdfe43eb8ff6f8b4315442318a4259deb4614167;hpb=d98150dffc69a810b0b842244aec0d29deddabfb

diff --git a/src/endgame.cpp b/src/endgame.cpp
index 00c70726..f1f29d61 100644
--- a/src/endgame.cpp
+++ b/src/endgame.cpp
@@ -22,7 +22,7 @@
 
 #include "bitcount.h"
 #include "endgame.h"
-#include "pawns.h"
+#include "movegen.h"
 
 using std::string;
 
@@ -77,7 +77,7 @@ namespace {
     string fen =  sides[0] + char('0' + int(8 - code.length()))
                 + sides[1] + "/8/8/8/8/8/8/8 w - - 0 10";
 
-    return Position(fen, false, 0).material_key();
+    return Position(fen, false, NULL).material_key();
   }
 
   template<typename M>
@@ -116,10 +116,8 @@ Endgames::~Endgames() {
 template<EndgameType E>
 void Endgames::add(const string& code) {
 
-  typedef typename eg_family<E>::type T;
-
-  map((T*)0)[key(code, WHITE)] = new Endgame<E>(WHITE);
-  map((T*)0)[key(code, BLACK)] = new Endgame<E>(BLACK);
+  map((Endgame<E>*)0)[key(code, WHITE)] = new Endgame<E>(WHITE);
+  map((Endgame<E>*)0)[key(code, BLACK)] = new Endgame<E>(BLACK);
 }
 
 
@@ -133,6 +131,13 @@ Value Endgame<KXK>::operator()(const Position& pos) const {
   assert(pos.non_pawn_material(weakerSide) == VALUE_ZERO);
   assert(pos.piece_count(weakerSide, PAWN) == VALUE_ZERO);
 
+  // Stalemate detection with lone king
+  if (    pos.side_to_move() == weakerSide
+      && !pos.in_check()
+      && !MoveList<MV_LEGAL>(pos).size()) {
+    return VALUE_DRAW;
+  }
+
   Square winnerKSq = pos.king_square(strongerSide);
   Square loserKSq = pos.king_square(weakerSide);
 
@@ -143,9 +148,9 @@ Value Endgame<KXK>::operator()(const Position& pos) const {
 
   if (   pos.piece_count(strongerSide, QUEEN)
       || pos.piece_count(strongerSide, ROOK)
-      || pos.piece_count(strongerSide, BISHOP) > 1)
-      // TODO: check for two equal-colored bishops!
-      result += VALUE_KNOWN_WIN;
+      || pos.bishop_pair(strongerSide)) {
+    result += VALUE_KNOWN_WIN;
+  }
 
   return strongerSide == pos.side_to_move() ? result : -result;
 }
@@ -405,7 +410,7 @@ ScaleFactor Endgame<KBPsK>::operator()(const Position& pos) const {
   File pawnFile = file_of(pos.piece_list(strongerSide, PAWN)[0]);
 
   // All pawns are on a single rook file ?
-  if (   (pawnFile == FILE_A || pawnFile == FILE_H)
+  if (    (pawnFile == FILE_A || pawnFile == FILE_H)
       && !(pawns & ~file_bb(pawnFile)))
   {
       Square bishopSq = pos.piece_list(strongerSide, BISHOP)[0];
@@ -416,7 +421,7 @@ ScaleFactor Endgame<KBPsK>::operator()(const Position& pos) const {
           && abs(file_of(kingSq) - pawnFile) <= 1)
       {
           // The bishop has the wrong color, and the defending king is on the
-          // file of the pawn(s) or the neighboring file. Find the rank of the
+          // file of the pawn(s) or the adjacent file. Find the rank of the
           // frontmost pawn.
           Rank rank;
           if (strongerSide == WHITE)
@@ -645,7 +650,7 @@ ScaleFactor Endgame<KPsK>::operator()(const Position& pos) const {
   {
       // Does the defending king block the pawns?
       if (   square_distance(ksq, relative_square(strongerSide, SQ_A8)) <= 1
-          || (   file_of(ksq) == FILE_A
+          || (    file_of(ksq) == FILE_A
               && !in_front_bb(strongerSide, ksq) & pawns))
           return SCALE_FACTOR_DRAW;
   }
@@ -654,7 +659,7 @@ ScaleFactor Endgame<KPsK>::operator()(const Position& pos) const {
   {
     // Does the defending king block the pawns?
     if (   square_distance(ksq, relative_square(strongerSide, SQ_H8)) <= 1
-        || (   file_of(ksq) == FILE_H
+        || (    file_of(ksq) == FILE_H
             && !in_front_bb(strongerSide, ksq) & pawns))
         return SCALE_FACTOR_DRAW;
   }
@@ -705,7 +710,7 @@ ScaleFactor Endgame<KBPKB>::operator()(const Position& pos) const {
           return SCALE_FACTOR_DRAW;
       else
       {
-          Bitboard path = squares_in_front_of(strongerSide, pawnSq);
+          Bitboard path = forward_bb(strongerSide, pawnSq);
 
           if (path & pos.pieces(KING, weakerSide))
               return SCALE_FACTOR_DRAW;
@@ -768,7 +773,7 @@ ScaleFactor Endgame<KBPPKB>::operator()(const Position& pos) const {
         return SCALE_FACTOR_NONE;
 
   case 1:
-    // Pawns on neighboring files. Draw if defender firmly controls the square
+    // Pawns on adjacent files. Draw if defender firmly controls the square
     // in front of the frontmost pawn's path, and the square diagonally behind
     // this square on the file of the other pawn.
     if (   ksq == blockSq1