Avoid sending info strings before 'uci' has been received

[stockfish] / src / movegen.cpp

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 8f6edffbfc33da9034530038912dadbbc1eb1dc5..a3abcde8d1e8dda3bf46d322ace4e529eafccd23 100644 (file)
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -52,8 +52,7 @@ namespace {
   template<Color Us, GenType Type>
   ExtMove* generate_pawn_moves(const Position& pos, ExtMove* moveList, Bitboard target) {
 
-    // Compute some compile time parameters relative to the white side
-    constexpr Color     Them     = (Us == WHITE ? BLACK      : WHITE);
+    constexpr Color     Them     = ~Us;
     constexpr Bitboard  TRank7BB = (Us == WHITE ? Rank7BB    : Rank2BB);
     constexpr Bitboard  TRank3BB = (Us == WHITE ? Rank3BB    : Rank6BB);
     constexpr Direction Up       = pawn_push(Us);
@@ -215,9 +214,6 @@ namespace {
 
   template<Color Us, GenType Type>
   ExtMove* generate_all(const Position& pos, ExtMove* moveList, Bitboard target) {
-
-    constexpr CastlingRights OO  = Us & KING_SIDE;
-    constexpr CastlingRights OOO = Us & QUEEN_SIDE;
     constexpr bool Checks = Type == QUIET_CHECKS; // Reduce template instantations
 
     moveList = generate_pawn_moves<Us, Type>(pos, moveList, target);
@@ -233,14 +229,10 @@ namespace {
         while (b)
             *moveList++ = make_move(ksq, pop_lsb(&b));
 
-        if (Type != CAPTURES && pos.can_castle(CastlingRights(OO | OOO)))
-        {
-            if (!pos.castling_impeded(OO) && pos.can_castle(OO))
-                *moveList++ = make<CASTLING>(ksq, pos.castling_rook_square(OO));
-
-            if (!pos.castling_impeded(OOO) && pos.can_castle(OOO))
-                *moveList++ = make<CASTLING>(ksq, pos.castling_rook_square(OOO));
-        }
+        if ((Type != CAPTURES) && pos.can_castle(Us & ANY_CASTLING))
+            for(CastlingRights cr : { Us & KING_SIDE, Us & QUEEN_SIDE } )
+                if (!pos.castling_impeded(cr) && pos.can_castle(cr))
+                    *moveList++ = make<CASTLING>(ksq, pos.castling_rook_square(cr));
     }
 
     return moveList;
@@ -285,16 +277,13 @@ ExtMove* generate<QUIET_CHECKS>(const Position& pos, ExtMove* moveList) {
   assert(!pos.checkers());
 
   Color us = pos.side_to_move();
-  Bitboard dc = pos.blockers_for_king(~us) & pos.pieces(us);
+  Bitboard dc = pos.blockers_for_king(~us) & pos.pieces(us) & ~pos.pieces(PAWN);
 
   while (dc)
   {
      Square from = pop_lsb(&dc);
      PieceType pt = type_of(pos.piece_on(from));
 
-     if (pt == PAWN)
-         continue; // Will be generated together with direct checks
-
      Bitboard b = pos.attacks_from(pt, from) & ~pos.pieces();
 
      if (pt == KING)
@@ -325,10 +314,7 @@ ExtMove* generate<EVASIONS>(const Position& pos, ExtMove* moveList) {
   // the king evasions in order to skip known illegal moves, which avoids any
   // useless legality checks later on.
   while (sliders)
-  {
-      Square checksq = pop_lsb(&sliders);
-      sliderAttacks |= LineBB[checksq][ksq] ^ checksq;
-  }
+      sliderAttacks |= LineBB[ksq][pop_lsb(&sliders)] & ~pos.checkers();
 
   // Generate evasions for king, capture and non capture moves
   Bitboard b = pos.attacks_from<KING>(ksq) & ~pos.pieces(us) & ~sliderAttacks;