Bonus for reachable outpost

[stockfish] / src / pawns.cpp

diff --git a/src/pawns.cpp b/src/pawns.cpp
index f3ceadbe130f481221eb8ffe553093ce7d3867a5..8b44587f6962ccfc0e05ca1a7b91e4a15d84a85e 100644 (file)
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -110,13 +110,13 @@ namespace {
     Square s;
     bool passed, isolated, opposed, backward, lever, connected;
     Score score = SCORE_ZERO;
-    const Square* pl = pos.list<PAWN>(Us);
+    const Square* pl = pos.squares<PAWN>(Us);
     const Bitboard* pawnAttacksBB = StepAttacksBB[make_piece(Us, PAWN)];
 
     Bitboard ourPawns   = pos.pieces(Us  , PAWN);
     Bitboard theirPawns = pos.pieces(Them, PAWN);
 
-    e->passedPawns[Us] = 0;
+    e->passedPawns[Us] = e->pawnAttacksSpan[Us] = 0;
     e->kingSquares[Us] = SQ_NONE;
     e->semiopenFiles[Us] = 0xFF;
     e->pawnAttacks[Us] = shift_bb<Right>(ourPawns) | shift_bb<Left>(ourPawns);
@@ -133,6 +133,8 @@ namespace {
         // This file cannot be semi-open
         e->semiopenFiles[Us] &= ~(1 << f);
 
+        e->pawnAttacksSpan[Us] |= pawn_attack_span(Us, s);
+
         // Flag the pawn
         neighbours  =   ourPawns   & adjacent_files_bb(f);
         doubled     =   ourPawns   & forward_bb(Us, s);
@@ -243,6 +245,7 @@ Entry* probe(const Position& pos) {
 
   e->key = key;
   e->score = evaluate<WHITE>(pos, e) - evaluate<BLACK>(pos, e);
+  e->asymmetry = popcount<Max15>(e->semiopenFiles[WHITE] ^ e->semiopenFiles[BLACK]);
   return e;
 }