Further simplify unstoppable (#938)

[stockfish] / src / movegen.cpp

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 322d2a6584711d5cc9a7e661ff93bffd18dc4576..6a3cdc244d8d5c27b92d2a9ef23d39eb7f023c8b 100644 (file)
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -42,8 +42,8 @@ namespace {
 
     assert(!pos.checkers());
 
-    const Square K = Chess960 ? kto > kfrom ? DELTA_W : DELTA_E
-                              : KingSide    ? DELTA_W : DELTA_E;
+    const Square K = Chess960 ? kto > kfrom ? WEST : EAST
+                              : KingSide    ? WEST : EAST;
 
     for (Square s = kto; s != kfrom; s += K)
         if (pos.attackers_to(s) & enemies)
@@ -65,23 +65,23 @@ namespace {
   }
 
 
-  template<GenType Type, Square Delta>
+  template<GenType Type, Square D>
   ExtMove* make_promotions(ExtMove* moveList, Square to, Square ksq) {
 
     if (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
-        *moveList++ = make<PROMOTION>(to - Delta, to, QUEEN);
+        *moveList++ = make<PROMOTION>(to - D, to, QUEEN);
 
     if (Type == QUIETS || Type == EVASIONS || Type == NON_EVASIONS)
     {
-        *moveList++ = make<PROMOTION>(to - Delta, to, ROOK);
-        *moveList++ = make<PROMOTION>(to - Delta, to, BISHOP);
-        *moveList++ = make<PROMOTION>(to - Delta, to, KNIGHT);
+        *moveList++ = make<PROMOTION>(to - D, to, ROOK);
+        *moveList++ = make<PROMOTION>(to - D, to, BISHOP);
+        *moveList++ = make<PROMOTION>(to - D, to, KNIGHT);
     }
 
     // Knight promotion is the only promotion that can give a direct check
     // that's not already included in the queen promotion.
     if (Type == QUIET_CHECKS && (StepAttacksBB[W_KNIGHT][to] & ksq))
-        *moveList++ = make<PROMOTION>(to - Delta, to, KNIGHT);
+        *moveList++ = make<PROMOTION>(to - D, to, KNIGHT);
     else
         (void)ksq; // Silence a warning under MSVC
 
@@ -94,13 +94,13 @@ namespace {
 
     // Compute our parametrized parameters at compile time, named according to
     // the point of view of white side.
-    const Color    Them     = (Us == WHITE ? BLACK    : WHITE);
-    const Bitboard TRank8BB = (Us == WHITE ? Rank8BB  : Rank1BB);
-    const Bitboard TRank7BB = (Us == WHITE ? Rank7BB  : Rank2BB);
-    const Bitboard TRank3BB = (Us == WHITE ? Rank3BB  : Rank6BB);
-    const Square   Up       = (Us == WHITE ? DELTA_N  : DELTA_S);
-    const Square   Right    = (Us == WHITE ? DELTA_NE : DELTA_SW);
-    const Square   Left     = (Us == WHITE ? DELTA_NW : DELTA_SE);
+    const Color    Them     = (Us == WHITE ? BLACK      : WHITE);
+    const Bitboard TRank8BB = (Us == WHITE ? Rank8BB    : Rank1BB);
+    const Bitboard TRank7BB = (Us == WHITE ? Rank7BB    : Rank2BB);
+    const Bitboard TRank3BB = (Us == WHITE ? Rank3BB    : Rank6BB);
+    const Square   Up       = (Us == WHITE ? NORTH      : SOUTH);
+    const Square   Right    = (Us == WHITE ? NORTH_EAST : SOUTH_WEST);
+    const Square   Left     = (Us == WHITE ? NORTH_WEST : SOUTH_EAST);
 
     Bitboard emptySquares;
 
@@ -115,8 +115,8 @@ namespace {
     {
         emptySquares = (Type == QUIETS || Type == QUIET_CHECKS ? target : ~pos.pieces());
 
-        Bitboard b1 = shift_bb<Up>(pawnsNotOn7)   & emptySquares;
-        Bitboard b2 = shift_bb<Up>(b1 & TRank3BB) & emptySquares;
+        Bitboard b1 = shift<Up>(pawnsNotOn7)   & emptySquares;
+        Bitboard b2 = shift<Up>(b1 & TRank3BB) & emptySquares;
 
         if (Type == EVASIONS) // Consider only blocking squares
         {
@@ -138,8 +138,8 @@ namespace {
             Bitboard dcCandidates = pos.discovered_check_candidates();
             if (pawnsNotOn7 & dcCandidates)
             {
-                Bitboard dc1 = shift_bb<Up>(pawnsNotOn7 & dcCandidates) & emptySquares & ~file_bb(ksq);
-                Bitboard dc2 = shift_bb<Up>(dc1 & TRank3BB) & emptySquares;
+                Bitboard dc1 = shift<Up>(pawnsNotOn7 & dcCandidates) & emptySquares & ~file_bb(ksq);
+                Bitboard dc2 = shift<Up>(dc1 & TRank3BB) & emptySquares;
 
                 b1 |= dc1;
                 b2 |= dc2;
@@ -168,9 +168,9 @@ namespace {
         if (Type == EVASIONS)
             emptySquares &= target;
 
-        Bitboard b1 = shift_bb<Right>(pawnsOn7) & enemies;
-        Bitboard b2 = shift_bb<Left >(pawnsOn7) & enemies;
-        Bitboard b3 = shift_bb<Up   >(pawnsOn7) & emptySquares;
+        Bitboard b1 = shift<Right>(pawnsOn7) & enemies;
+        Bitboard b2 = shift<Left >(pawnsOn7) & enemies;
+        Bitboard b3 = shift<Up   >(pawnsOn7) & emptySquares;
 
         Square ksq = pos.square<KING>(Them);
 
@@ -187,8 +187,8 @@ namespace {
     // Standard and en-passant captures
     if (Type == CAPTURES || Type == EVASIONS || Type == NON_EVASIONS)
     {
-        Bitboard b1 = shift_bb<Right>(pawnsNotOn7) & enemies;
-        Bitboard b2 = shift_bb<Left >(pawnsNotOn7) & enemies;
+        Bitboard b1 = shift<Right>(pawnsNotOn7) & enemies;
+        Bitboard b2 = shift<Left >(pawnsNotOn7) & enemies;
 
         while (b1)
         {
@@ -238,7 +238,7 @@ namespace {
         if (Checks)
         {
             if (    (Pt == BISHOP || Pt == ROOK || Pt == QUEEN)
-                && !(PseudoAttacks[Pt][from] & target & pos.check_info().checkSquares[Pt]))
+                && !(PseudoAttacks[Pt][from] & target & pos.check_squares(Pt)))
                 continue;
 
             if (pos.discovered_check_candidates() & from)
@@ -248,7 +248,7 @@ namespace {
         Bitboard b = pos.attacks_from<Pt>(from) & target;
 
         if (Checks)
-            b &= pos.check_info().checkSquares[Pt];
+            b &= pos.check_squares(Pt);
 
         while (b)
             *moveList++ = make_move(from, pop_lsb(&b));