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Rename Position::list

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Use Position::square and Position::squares instead.

This allow us to remove king_square(), simplify
endgames and to have more naming uniformity.

Moreover, this is a prerequisite step in case
in the future we decide to retire piece lists
altoghter and use pop_lsb() to loop across
pieces and serialize the moves. In this way
we just need to change definition of Position::square
to something like:

template<PieceType Pt> inline
Square Position::square(Color c) const {
  return lsb(byColorBB[c]);
}

No functional change.
This commit is contained in:
Marco Costalba
2015-08-04 09:00:52 +02:00
parent 68d61b80c6
commit e6310b3469
6 changed files with 109 additions and 109 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/endgame.cpp
+72 -73
View File
@@ -71,7 +71,7 @@ namespace {
assert(pos.count<PAWN>(strongSide) == 1); assert(pos.count<PAWN>(strongSide) == 1);
if (file_of(pos.list<PAWN>(strongSide)[0]) >= FILE_E) if (file_of(pos.square<PAWN>(strongSide)) >= FILE_E)
sq = Square(sq ^ 7); // Mirror SQ_H1 -> SQ_A1 sq = Square(sq ^ 7); // Mirror SQ_H1 -> SQ_A1
if (strongSide == BLACK) if (strongSide == BLACK)
@@ -147,8 +147,8 @@ Value Endgame<KXK>::operator()(const Position& pos) const {
if (pos.side_to_move() == weakSide && !MoveList<LEGAL>(pos).size()) if (pos.side_to_move() == weakSide && !MoveList<LEGAL>(pos).size())
return VALUE_DRAW; return VALUE_DRAW;
Square winnerKSq = pos.king_square(strongSide); Square winnerKSq = pos.square<KING>(strongSide);
Square loserKSq = pos.king_square(weakSide); Square loserKSq = pos.square<KING>(weakSide);
Value result = pos.non_pawn_material(strongSide) Value result = pos.non_pawn_material(strongSide)
+ pos.count<PAWN>(strongSide) * PawnValueEg + pos.count<PAWN>(strongSide) * PawnValueEg
@@ -158,8 +158,8 @@ Value Endgame<KXK>::operator()(const Position& pos) const {
if ( pos.count<QUEEN>(strongSide) if ( pos.count<QUEEN>(strongSide)
|| pos.count<ROOK>(strongSide) || pos.count<ROOK>(strongSide)
||(pos.count<BISHOP>(strongSide) && pos.count<KNIGHT>(strongSide)) ||(pos.count<BISHOP>(strongSide) && pos.count<KNIGHT>(strongSide))
||(pos.count<BISHOP>(strongSide) > 1 && opposite_colors(pos.list<BISHOP>(strongSide)[0], ||(pos.count<BISHOP>(strongSide) > 1 && opposite_colors(pos.squares<BISHOP>(strongSide)[0],
pos.list<BISHOP>(strongSide)[1]))) pos.squares<BISHOP>(strongSide)[1])))
result += VALUE_KNOWN_WIN; result += VALUE_KNOWN_WIN;
return strongSide == pos.side_to_move() ? result : -result; return strongSide == pos.side_to_move() ? result : -result;
@@ -174,9 +174,9 @@ Value Endgame<KBNK>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, KnightValueMg + BishopValueMg, 0)); assert(verify_material(pos, strongSide, KnightValueMg + BishopValueMg, 0));
assert(verify_material(pos, weakSide, VALUE_ZERO, 0)); assert(verify_material(pos, weakSide, VALUE_ZERO, 0));
Square winnerKSq = pos.king_square(strongSide); Square winnerKSq = pos.square<KING>(strongSide);
Square loserKSq = pos.king_square(weakSide); Square loserKSq = pos.square<KING>(weakSide);
Square bishopSq = pos.list<BISHOP>(strongSide)[0]; Square bishopSq = pos.square<BISHOP>(strongSide);
// kbnk_mate_table() tries to drive toward corners A1 or H8. If we have a // kbnk_mate_table() tries to drive toward corners A1 or H8. If we have a
// bishop that cannot reach the above squares, we flip the kings in order // bishop that cannot reach the above squares, we flip the kings in order
@@ -203,9 +203,9 @@ Value Endgame<KPK>::operator()(const Position& pos) const {
assert(verify_material(pos, weakSide, VALUE_ZERO, 0)); assert(verify_material(pos, weakSide, VALUE_ZERO, 0));
// Assume strongSide is white and the pawn is on files A-D // Assume strongSide is white and the pawn is on files A-D
Square wksq = normalize(pos, strongSide, pos.king_square(strongSide)); Square wksq = normalize(pos, strongSide, pos.square<KING>(strongSide));
Square bksq = normalize(pos, strongSide, pos.king_square(weakSide)); Square bksq = normalize(pos, strongSide, pos.square<KING>(weakSide));
Square psq = normalize(pos, strongSide, pos.list<PAWN>(strongSide)[0]); Square psq = normalize(pos, strongSide, pos.square<PAWN>(strongSide));
Color us = strongSide == pos.side_to_move() ? WHITE : BLACK; Color us = strongSide == pos.side_to_move() ? WHITE : BLACK;
@@ -228,10 +228,10 @@ Value Endgame<KRKP>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, RookValueMg, 0)); assert(verify_material(pos, strongSide, RookValueMg, 0));
assert(verify_material(pos, weakSide, VALUE_ZERO, 1)); assert(verify_material(pos, weakSide, VALUE_ZERO, 1));
Square wksq = relative_square(strongSide, pos.king_square(strongSide)); Square wksq = relative_square(strongSide, pos.square<KING>(strongSide));
Square bksq = relative_square(strongSide, pos.king_square(weakSide)); Square bksq = relative_square(strongSide, pos.square<KING>(weakSide));
Square rsq = relative_square(strongSide, pos.list<ROOK>(strongSide)[0]); Square rsq = relative_square(strongSide, pos.square<ROOK>(strongSide));
Square psq = relative_square(strongSide, pos.list<PAWN>(weakSide)[0]); Square psq = relative_square(strongSide, pos.square<PAWN>(weakSide));
Square queeningSq = make_square(file_of(psq), RANK_1); Square queeningSq = make_square(file_of(psq), RANK_1);
Value result; Value result;
@@ -271,7 +271,7 @@ Value Endgame<KRKB>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, RookValueMg, 0)); assert(verify_material(pos, strongSide, RookValueMg, 0));
assert(verify_material(pos, weakSide, BishopValueMg, 0)); assert(verify_material(pos, weakSide, BishopValueMg, 0));
Value result = Value(PushToEdges[pos.king_square(weakSide)]); Value result = Value(PushToEdges[pos.square<KING>(weakSide)]);
return strongSide == pos.side_to_move() ? result : -result; return strongSide == pos.side_to_move() ? result : -result;
} }
@@ -284,8 +284,8 @@ Value Endgame<KRKN>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, RookValueMg, 0)); assert(verify_material(pos, strongSide, RookValueMg, 0));
assert(verify_material(pos, weakSide, KnightValueMg, 0)); assert(verify_material(pos, weakSide, KnightValueMg, 0));
Square bksq = pos.king_square(weakSide); Square bksq = pos.square<KING>(weakSide);
Square bnsq = pos.list<KNIGHT>(weakSide)[0]; Square bnsq = pos.square<KNIGHT>(weakSide);
Value result = Value(PushToEdges[bksq] + PushAway[distance(bksq, bnsq)]); Value result = Value(PushToEdges[bksq] + PushAway[distance(bksq, bnsq)]);
return strongSide == pos.side_to_move() ? result : -result; return strongSide == pos.side_to_move() ? result : -result;
} }
@@ -301,9 +301,9 @@ Value Endgame<KQKP>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, QueenValueMg, 0)); assert(verify_material(pos, strongSide, QueenValueMg, 0));
assert(verify_material(pos, weakSide, VALUE_ZERO, 1)); assert(verify_material(pos, weakSide, VALUE_ZERO, 1));
Square winnerKSq = pos.king_square(strongSide); Square winnerKSq = pos.square<KING>(strongSide);
Square loserKSq = pos.king_square(weakSide); Square loserKSq = pos.square<KING>(weakSide);
Square pawnSq = pos.list<PAWN>(weakSide)[0]; Square pawnSq = pos.square<PAWN>(weakSide);
Value result = Value(PushClose[distance(winnerKSq, loserKSq)]); Value result = Value(PushClose[distance(winnerKSq, loserKSq)]);
@@ -326,8 +326,8 @@ Value Endgame<KQKR>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, QueenValueMg, 0)); assert(verify_material(pos, strongSide, QueenValueMg, 0));
assert(verify_material(pos, weakSide, RookValueMg, 0)); assert(verify_material(pos, weakSide, RookValueMg, 0));
Square winnerKSq = pos.king_square(strongSide); Square winnerKSq = pos.square<KING>(strongSide);
Square loserKSq = pos.king_square(weakSide); Square loserKSq = pos.square<KING>(weakSide);
Value result = QueenValueEg Value result = QueenValueEg
- RookValueEg - RookValueEg
@@ -356,15 +356,15 @@ ScaleFactor Endgame<KBPsK>::operator()(const Position& pos) const {
// be detected even when the weaker side has some pawns. // be detected even when the weaker side has some pawns.
Bitboard pawns = pos.pieces(strongSide, PAWN); Bitboard pawns = pos.pieces(strongSide, PAWN);
File pawnFile = file_of(pos.list<PAWN>(strongSide)[0]); File pawnsFile = file_of(lsb(pawns));
// All pawns are on a single rook file ? // All pawns are on a single rook file?
if ( (pawnFile == FILE_A || pawnFile == FILE_H) if ( (pawnsFile == FILE_A || pawnsFile == FILE_H)
&& !(pawns & ~file_bb(pawnFile))) && !(pawns & ~file_bb(pawnsFile)))
{ {
Square bishopSq = pos.list<BISHOP>(strongSide)[0]; Square bishopSq = pos.square<BISHOP>(strongSide);
Square queeningSq = relative_square(strongSide, make_square(pawnFile, RANK_8)); Square queeningSq = relative_square(strongSide, make_square(pawnsFile, RANK_8));
Square kingSq = pos.king_square(weakSide); Square kingSq = pos.square<KING>(weakSide);
if ( opposite_colors(queeningSq, bishopSq) if ( opposite_colors(queeningSq, bishopSq)
&& distance(queeningSq, kingSq) <= 1) && distance(queeningSq, kingSq) <= 1)
@@ -372,17 +372,17 @@ ScaleFactor Endgame<KBPsK>::operator()(const Position& pos) const {
} }
// If all the pawns are on the same B or G file, then it's potentially a draw // If all the pawns are on the same B or G file, then it's potentially a draw
if ( (pawnFile == FILE_B || pawnFile == FILE_G) if ( (pawnsFile == FILE_B || pawnsFile == FILE_G)
&& !(pos.pieces(PAWN) & ~file_bb(pawnFile)) && !(pos.pieces(PAWN) & ~file_bb(pawnsFile))
&& pos.non_pawn_material(weakSide) == 0 && pos.non_pawn_material(weakSide) == 0
&& pos.count<PAWN>(weakSide) >= 1) && pos.count<PAWN>(weakSide) >= 1)
{ {
// Get weakSide pawn that is closest to the home rank // Get weakSide pawn that is closest to the home rank
Square weakPawnSq = backmost_sq(weakSide, pos.pieces(weakSide, PAWN)); Square weakPawnSq = backmost_sq(weakSide, pos.pieces(weakSide, PAWN));
Square strongKingSq = pos.king_square(strongSide); Square strongKingSq = pos.square<KING>(strongSide);
Square weakKingSq = pos.king_square(weakSide); Square weakKingSq = pos.square<KING>(weakSide);
Square bishopSq = pos.list<BISHOP>(strongSide)[0]; Square bishopSq = pos.square<BISHOP>(strongSide);
// There's potential for a draw if our pawn is blocked on the 7th rank, // There's potential for a draw if our pawn is blocked on the 7th rank,
// the bishop cannot attack it or they only have one pawn left // the bishop cannot attack it or they only have one pawn left
@@ -419,11 +419,11 @@ ScaleFactor Endgame<KQKRPs>::operator()(const Position& pos) const {
assert(pos.count<ROOK>(weakSide) == 1); assert(pos.count<ROOK>(weakSide) == 1);
assert(pos.count<PAWN>(weakSide) >= 1); assert(pos.count<PAWN>(weakSide) >= 1);
Square kingSq = pos.king_square(weakSide); Square kingSq = pos.square<KING>(weakSide);
Square rsq = pos.list<ROOK>(weakSide)[0]; Square rsq = pos.square<ROOK>(weakSide);
if ( relative_rank(weakSide, kingSq) <= RANK_2 if ( relative_rank(weakSide, kingSq) <= RANK_2
&& relative_rank(weakSide, pos.king_square(strongSide)) >= RANK_4 && relative_rank(weakSide, pos.square<KING>(strongSide)) >= RANK_4
&& relative_rank(weakSide, rsq) == RANK_3 && relative_rank(weakSide, rsq) == RANK_3
&& ( pos.pieces(weakSide, PAWN) && ( pos.pieces(weakSide, PAWN)
& pos.attacks_from<KING>(kingSq) & pos.attacks_from<KING>(kingSq)
@@ -447,11 +447,11 @@ ScaleFactor Endgame<KRPKR>::operator()(const Position& pos) const {
assert(verify_material(pos, weakSide, RookValueMg, 0)); assert(verify_material(pos, weakSide, RookValueMg, 0));
// Assume strongSide is white and the pawn is on files A-D // Assume strongSide is white and the pawn is on files A-D
Square wksq = normalize(pos, strongSide, pos.king_square(strongSide)); Square wksq = normalize(pos, strongSide, pos.square<KING>(strongSide));
Square bksq = normalize(pos, strongSide, pos.king_square(weakSide)); Square bksq = normalize(pos, strongSide, pos.square<KING>(weakSide));
Square wrsq = normalize(pos, strongSide, pos.list<ROOK>(strongSide)[0]); Square wrsq = normalize(pos, strongSide, pos.square<ROOK>(strongSide));
Square wpsq = normalize(pos, strongSide, pos.list<PAWN>(strongSide)[0]); Square wpsq = normalize(pos, strongSide, pos.square<PAWN>(strongSide));
Square brsq = normalize(pos, strongSide, pos.list<ROOK>(weakSide)[0]); Square brsq = normalize(pos, strongSide, pos.square<ROOK>(weakSide));
File f = file_of(wpsq); File f = file_of(wpsq);
Rank r = rank_of(wpsq); Rank r = rank_of(wpsq);
@@ -543,9 +543,9 @@ ScaleFactor Endgame<KRPKB>::operator()(const Position& pos) const {
// Test for a rook pawn // Test for a rook pawn
if (pos.pieces(PAWN) & (FileABB | FileHBB)) if (pos.pieces(PAWN) & (FileABB | FileHBB))
{ {
Square ksq = pos.king_square(weakSide); Square ksq = pos.square<KING>(weakSide);
Square bsq = pos.list<BISHOP>(weakSide)[0]; Square bsq = pos.square<BISHOP>(weakSide);
Square psq = pos.list<PAWN>(strongSide)[0]; Square psq = pos.square<PAWN>(strongSide);
Rank rk = relative_rank(strongSide, psq); Rank rk = relative_rank(strongSide, psq);
Square push = pawn_push(strongSide); Square push = pawn_push(strongSide);
@@ -558,7 +558,7 @@ ScaleFactor Endgame<KRPKB>::operator()(const Position& pos) const {
{ {
int d = distance(psq + 3 * push, ksq); int d = distance(psq + 3 * push, ksq);
if (d <= 2 && !(d == 0 && ksq == pos.king_square(strongSide) + 2 * push)) if (d <= 2 && !(d == 0 && ksq == pos.square<KING>(strongSide) + 2 * push))
return ScaleFactor(24); return ScaleFactor(24);
else else
return ScaleFactor(48); return ScaleFactor(48);
@@ -586,9 +586,9 @@ ScaleFactor Endgame<KRPPKRP>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, RookValueMg, 2)); assert(verify_material(pos, strongSide, RookValueMg, 2));
assert(verify_material(pos, weakSide, RookValueMg, 1)); assert(verify_material(pos, weakSide, RookValueMg, 1));
Square wpsq1 = pos.list<PAWN>(strongSide)[0]; Square wpsq1 = pos.squares<PAWN>(strongSide)[0];
Square wpsq2 = pos.list<PAWN>(strongSide)[1]; Square wpsq2 = pos.squares<PAWN>(strongSide)[1];
Square bksq = pos.king_square(weakSide); Square bksq = pos.square<KING>(weakSide);
// Does the stronger side have a passed pawn? // Does the stronger side have a passed pawn?
if (pos.pawn_passed(strongSide, wpsq1) || pos.pawn_passed(strongSide, wpsq2)) if (pos.pawn_passed(strongSide, wpsq1) || pos.pawn_passed(strongSide, wpsq2))
@@ -622,15 +622,14 @@ ScaleFactor Endgame<KPsK>::operator()(const Position& pos) const {
assert(pos.count<PAWN>(strongSide) >= 2); assert(pos.count<PAWN>(strongSide) >= 2);
assert(verify_material(pos, weakSide, VALUE_ZERO, 0)); assert(verify_material(pos, weakSide, VALUE_ZERO, 0));
Square ksq = pos.king_square(weakSide); Square ksq = pos.square<KING>(weakSide);
Bitboard pawns = pos.pieces(strongSide, PAWN); Bitboard pawns = pos.pieces(strongSide, PAWN);
Square psq = pos.list<PAWN>(strongSide)[0];
// If all pawns are ahead of the king, on a single rook file and // If all pawns are ahead of the king, on a single rook file and
// the king is within one file of the pawns, it's a draw. // the king is within one file of the pawns, it's a draw.
if ( !(pawns & ~in_front_bb(weakSide, rank_of(ksq))) if ( !(pawns & ~in_front_bb(weakSide, rank_of(ksq)))
&& !((pawns & ~FileABB) && (pawns & ~FileHBB)) && !((pawns & ~FileABB) && (pawns & ~FileHBB))
&& distance<File>(ksq, psq) <= 1) && distance<File>(ksq, lsb(pawns)) <= 1)
return SCALE_FACTOR_DRAW; return SCALE_FACTOR_DRAW;
return SCALE_FACTOR_NONE; return SCALE_FACTOR_NONE;
@@ -647,10 +646,10 @@ ScaleFactor Endgame<KBPKB>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, BishopValueMg, 1)); assert(verify_material(pos, strongSide, BishopValueMg, 1));
assert(verify_material(pos, weakSide, BishopValueMg, 0)); assert(verify_material(pos, weakSide, BishopValueMg, 0));
Square pawnSq = pos.list<PAWN>(strongSide)[0]; Square pawnSq = pos.square<PAWN>(strongSide);
Square strongBishopSq = pos.list<BISHOP>(strongSide)[0]; Square strongBishopSq = pos.square<BISHOP>(strongSide);
Square weakBishopSq = pos.list<BISHOP>(weakSide)[0]; Square weakBishopSq = pos.square<BISHOP>(weakSide);
Square weakKingSq = pos.king_square(weakSide); Square weakKingSq = pos.square<KING>(weakSide);
// Case 1: Defending king blocks the pawn, and cannot be driven away // Case 1: Defending king blocks the pawn, and cannot be driven away
if ( file_of(weakKingSq) == file_of(pawnSq) if ( file_of(weakKingSq) == file_of(pawnSq)
@@ -697,15 +696,15 @@ ScaleFactor Endgame<KBPPKB>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, BishopValueMg, 2)); assert(verify_material(pos, strongSide, BishopValueMg, 2));
assert(verify_material(pos, weakSide, BishopValueMg, 0)); assert(verify_material(pos, weakSide, BishopValueMg, 0));
Square wbsq = pos.list<BISHOP>(strongSide)[0]; Square wbsq = pos.square<BISHOP>(strongSide);
Square bbsq = pos.list<BISHOP>(weakSide)[0]; Square bbsq = pos.square<BISHOP>(weakSide);
if (!opposite_colors(wbsq, bbsq)) if (!opposite_colors(wbsq, bbsq))
return SCALE_FACTOR_NONE; return SCALE_FACTOR_NONE;
Square ksq = pos.king_square(weakSide); Square ksq = pos.square<KING>(weakSide);
Square psq1 = pos.list<PAWN>(strongSide)[0]; Square psq1 = pos.squares<PAWN>(strongSide)[0];
Square psq2 = pos.list<PAWN>(strongSide)[1]; Square psq2 = pos.squares<PAWN>(strongSide)[1];
Rank r1 = rank_of(psq1); Rank r1 = rank_of(psq1);
Rank r2 = rank_of(psq2); Rank r2 = rank_of(psq2);
Square blockSq1, blockSq2; Square blockSq1, blockSq2;
@@ -768,9 +767,9 @@ ScaleFactor Endgame<KBPKN>::operator()(const Position& pos) const {
assert(verify_material(pos, strongSide, BishopValueMg, 1)); assert(verify_material(pos, strongSide, BishopValueMg, 1));
assert(verify_material(pos, weakSide, KnightValueMg, 0)); assert(verify_material(pos, weakSide, KnightValueMg, 0));
Square pawnSq = pos.list<PAWN>(strongSide)[0]; Square pawnSq = pos.square<PAWN>(strongSide);
Square strongBishopSq = pos.list<BISHOP>(strongSide)[0]; Square strongBishopSq = pos.square<BISHOP>(strongSide);
Square weakKingSq = pos.king_square(weakSide); Square weakKingSq = pos.square<KING>(weakSide);
if ( file_of(weakKingSq) == file_of(pawnSq) if ( file_of(weakKingSq) == file_of(pawnSq)
&& relative_rank(strongSide, pawnSq) < relative_rank(strongSide, weakKingSq) && relative_rank(strongSide, pawnSq) < relative_rank(strongSide, weakKingSq)
@@ -791,8 +790,8 @@ ScaleFactor Endgame<KNPK>::operator()(const Position& pos) const {
assert(verify_material(pos, weakSide, VALUE_ZERO, 0)); assert(verify_material(pos, weakSide, VALUE_ZERO, 0));
// Assume strongSide is white and the pawn is on files A-D // Assume strongSide is white and the pawn is on files A-D
Square pawnSq = normalize(pos, strongSide, pos.list<PAWN>(strongSide)[0]); Square pawnSq = normalize(pos, strongSide, pos.square<PAWN>(strongSide));
Square weakKingSq = normalize(pos, strongSide, pos.king_square(weakSide)); Square weakKingSq = normalize(pos, strongSide, pos.square<KING>(weakSide));
if (pawnSq == SQ_A7 && distance(SQ_A8, weakKingSq) <= 1) if (pawnSq == SQ_A7 && distance(SQ_A8, weakKingSq) <= 1)
return SCALE_FACTOR_DRAW; return SCALE_FACTOR_DRAW;
@@ -806,9 +805,9 @@ ScaleFactor Endgame<KNPK>::operator()(const Position& pos) const {
template<> template<>
ScaleFactor Endgame<KNPKB>::operator()(const Position& pos) const { ScaleFactor Endgame<KNPKB>::operator()(const Position& pos) const {
Square pawnSq = pos.list<PAWN>(strongSide)[0]; Square pawnSq = pos.square<PAWN>(strongSide);
Square bishopSq = pos.list<BISHOP>(weakSide)[0]; Square bishopSq = pos.square<BISHOP>(weakSide);
Square weakKingSq = pos.king_square(weakSide); Square weakKingSq = pos.square<KING>(weakSide);
// King needs to get close to promoting pawn to prevent knight from blocking. // King needs to get close to promoting pawn to prevent knight from blocking.
// Rules for this are very tricky, so just approximate. // Rules for this are very tricky, so just approximate.
@@ -831,9 +830,9 @@ ScaleFactor Endgame<KPKP>::operator()(const Position& pos) const {
assert(verify_material(pos, weakSide, VALUE_ZERO, 1)); assert(verify_material(pos, weakSide, VALUE_ZERO, 1));
// Assume strongSide is white and the pawn is on files A-D // Assume strongSide is white and the pawn is on files A-D
Square wksq = normalize(pos, strongSide, pos.king_square(strongSide)); Square wksq = normalize(pos, strongSide, pos.square<KING>(strongSide));
Square bksq = normalize(pos, strongSide, pos.king_square(weakSide)); Square bksq = normalize(pos, strongSide, pos.square<KING>(weakSide));
Square psq = normalize(pos, strongSide, pos.list<PAWN>(strongSide)[0]); Square psq = normalize(pos, strongSide, pos.square<PAWN>(strongSide));
Color us = strongSide == pos.side_to_move() ? WHITE : BLACK; Color us = strongSide == pos.side_to_move() ? WHITE : BLACK;
src/evaluate.cpp
+11 -11
View File
@@ -208,7 +208,7 @@ namespace {
ei.pinnedPieces[Us] = pos.pinned_pieces(Us); ei.pinnedPieces[Us] = pos.pinned_pieces(Us);
ei.attackedBy[Us][ALL_PIECES] = ei.attackedBy[Us][PAWN] = ei.pi->pawn_attacks(Us); ei.attackedBy[Us][ALL_PIECES] = ei.attackedBy[Us][PAWN] = ei.pi->pawn_attacks(Us);
Bitboard b = ei.attackedBy[Them][KING] = pos.attacks_from<KING>(pos.king_square(Them)); Bitboard b = ei.attackedBy[Them][KING] = pos.attacks_from<KING>(pos.square<KING>(Them));
// Init king safety tables only if we are going to use them // Init king safety tables only if we are going to use them
if (pos.non_pawn_material(Us) >= QueenValueMg) if (pos.non_pawn_material(Us) >= QueenValueMg)
@@ -234,7 +234,7 @@ namespace {
const PieceType NextPt = (Us == WHITE ? Pt : PieceType(Pt + 1)); const PieceType NextPt = (Us == WHITE ? Pt : PieceType(Pt + 1));
const Color Them = (Us == WHITE ? BLACK : WHITE); const Color Them = (Us == WHITE ? BLACK : WHITE);
const Square* pl = pos.list<Pt>(Us); const Square* pl = pos.squares<Pt>(Us);
ei.attackedBy[Us][Pt] = 0; ei.attackedBy[Us][Pt] = 0;
@@ -246,7 +246,7 @@ namespace {
: pos.attacks_from<Pt>(s); : pos.attacks_from<Pt>(s);
if (ei.pinnedPieces[Us] & s) if (ei.pinnedPieces[Us] & s)
b &= LineBB[pos.king_square(Us)][s]; b &= LineBB[pos.square<KING>(Us)][s];
ei.attackedBy[Us][ALL_PIECES] |= ei.attackedBy[Us][Pt] |= b; ei.attackedBy[Us][ALL_PIECES] |= ei.attackedBy[Us][Pt] |= b;
@@ -316,7 +316,7 @@ namespace {
// Penalize when trapped by the king, even more if king cannot castle // Penalize when trapped by the king, even more if king cannot castle
if (mob <= 3 && !ei.pi->semiopen_file(Us, file_of(s))) if (mob <= 3 && !ei.pi->semiopen_file(Us, file_of(s)))
{ {
Square ksq = pos.king_square(Us); Square ksq = pos.square<KING>(Us);
if ( ((file_of(ksq) < FILE_E) == (file_of(s) < file_of(ksq))) if ( ((file_of(ksq) < FILE_E) == (file_of(s) < file_of(ksq)))
&& (rank_of(ksq) == rank_of(s) || relative_rank(Us, ksq) == RANK_1) && (rank_of(ksq) == rank_of(s) || relative_rank(Us, ksq) == RANK_1)
@@ -348,7 +348,7 @@ namespace {
Bitboard undefended, b, b1, b2, safe; Bitboard undefended, b, b1, b2, safe;
int attackUnits; int attackUnits;
const Square ksq = pos.king_square(Us); const Square ksq = pos.square<KING>(Us);
// King shelter and enemy pawns storm // King shelter and enemy pawns storm
Score score = ei.pi->king_safety<Us>(pos, ksq); Score score = ei.pi->king_safety<Us>(pos, ksq);
@@ -575,12 +575,12 @@ namespace {
Square blockSq = s + pawn_push(Us); Square blockSq = s + pawn_push(Us);
// Adjust bonus based on the king's proximity // Adjust bonus based on the king's proximity
ebonus += distance(pos.king_square(Them), blockSq) * 5 * rr ebonus += distance(pos.square<KING>(Them), blockSq) * 5 * rr
- distance(pos.king_square(Us ), blockSq) * 2 * rr; - distance(pos.square<KING>(Us ), blockSq) * 2 * rr;
// If blockSq is not the queening square then consider also a second push // If blockSq is not the queening square then consider also a second push
if (relative_rank(Us, blockSq) != RANK_8) if (relative_rank(Us, blockSq) != RANK_8)
ebonus -= distance(pos.king_square(Us), blockSq + pawn_push(Us)) * rr; ebonus -= distance(pos.square<KING>(Us), blockSq + pawn_push(Us)) * rr;
// If the pawn is free to advance, then increase the bonus // If the pawn is free to advance, then increase the bonus
if (pos.empty(blockSq)) if (pos.empty(blockSq))
@@ -710,8 +710,8 @@ namespace {
// Do not include in mobility squares protected by enemy pawns, or occupied // Do not include in mobility squares protected by enemy pawns, or occupied
// by our blocked pawns or king. // by our blocked pawns or king.
Bitboard mobilityArea[] = { Bitboard mobilityArea[] = {
~(ei.attackedBy[BLACK][PAWN] | blockedPawns[WHITE] | pos.king_square(WHITE)), ~(ei.attackedBy[BLACK][PAWN] | blockedPawns[WHITE] | pos.square<KING>(WHITE)),
~(ei.attackedBy[WHITE][PAWN] | blockedPawns[BLACK] | pos.king_square(BLACK)) ~(ei.attackedBy[WHITE][PAWN] | blockedPawns[BLACK] | pos.square<KING>(BLACK))
}; };
// Evaluate pieces and mobility // Evaluate pieces and mobility
@@ -772,7 +772,7 @@ namespace {
// pawns are drawish. // pawns are drawish.
else if ( abs(eg_value(score)) <= BishopValueEg else if ( abs(eg_value(score)) <= BishopValueEg
&& ei.pi->pawn_span(strongSide) <= 1 && ei.pi->pawn_span(strongSide) <= 1
&& !pos.pawn_passed(~strongSide, pos.king_square(~strongSide))) && !pos.pawn_passed(~strongSide, pos.square<KING>(~strongSide)))
sf = ei.pi->pawn_span(strongSide) ? ScaleFactor(56) : ScaleFactor(38); sf = ei.pi->pawn_span(strongSide) ? ScaleFactor(56) : ScaleFactor(38);
} }
src/movegen.cpp
+5 -5
View File
@@ -34,7 +34,7 @@ namespace {
// After castling, the rook and king final positions are the same in Chess960 // After castling, the rook and king final positions are the same in Chess960
// as they would be in standard chess. // as they would be in standard chess.
Square kfrom = pos.king_square(us); Square kfrom = pos.square<KING>(us);
Square rfrom = pos.castling_rook_square(Cr); Square rfrom = pos.castling_rook_square(Cr);
Square kto = relative_square(us, KingSide ? SQ_G1 : SQ_C1); Square kto = relative_square(us, KingSide ? SQ_G1 : SQ_C1);
Bitboard enemies = pos.pieces(~us); Bitboard enemies = pos.pieces(~us);
@@ -225,7 +225,7 @@ namespace {
assert(Pt != KING && Pt != PAWN); assert(Pt != KING && Pt != PAWN);
const Square* pl = pos.list<Pt>(us); const Square* pl = pos.squares<Pt>(us);
for (Square from = *pl; from != SQ_NONE; from = *++pl) for (Square from = *pl; from != SQ_NONE; from = *++pl)
{ {
@@ -266,7 +266,7 @@ namespace {
if (Type != QUIET_CHECKS && Type != EVASIONS) if (Type != QUIET_CHECKS && Type != EVASIONS)
{ {
Square ksq = pos.king_square(Us); Square ksq = pos.square<KING>(Us);
Bitboard b = pos.attacks_from<KING>(ksq) & target; Bitboard b = pos.attacks_from<KING>(ksq) & target;
while (b) while (b)
*moveList++ = make_move(ksq, pop_lsb(&b)); *moveList++ = make_move(ksq, pop_lsb(&b));
@@ -364,7 +364,7 @@ ExtMove* generate<EVASIONS>(const Position& pos, ExtMove* moveList) {
assert(pos.checkers()); assert(pos.checkers());
Color us = pos.side_to_move(); Color us = pos.side_to_move();
Square ksq = pos.king_square(us); Square ksq = pos.square<KING>(us);
Bitboard sliderAttacks = 0; Bitboard sliderAttacks = 0;
Bitboard sliders = pos.checkers() & ~pos.pieces(KNIGHT, PAWN); Bitboard sliders = pos.checkers() & ~pos.pieces(KNIGHT, PAWN);
@@ -400,7 +400,7 @@ template<>
ExtMove* generate<LEGAL>(const Position& pos, ExtMove* moveList) { ExtMove* generate<LEGAL>(const Position& pos, ExtMove* moveList) {
Bitboard pinned = pos.pinned_pieces(pos.side_to_move()); Bitboard pinned = pos.pinned_pieces(pos.side_to_move());
Square ksq = pos.king_square(pos.side_to_move()); Square ksq = pos.square<KING>(pos.side_to_move());
ExtMove* cur = moveList; ExtMove* cur = moveList;
moveList = pos.checkers() ? generate<EVASIONS >(pos, moveList) moveList = pos.checkers() ? generate<EVASIONS >(pos, moveList)
src/pawns.cpp
+1 -1
View File
@@ -110,7 +110,7 @@ namespace {
Square s; Square s;
bool passed, isolated, opposed, backward, lever, connected; bool passed, isolated, opposed, backward, lever, connected;
Score score = SCORE_ZERO; 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)]; const Bitboard* pawnAttacksBB = StepAttacksBB[make_piece(Us, PAWN)];
Bitboard ourPawns = pos.pieces(Us , PAWN); Bitboard ourPawns = pos.pieces(Us , PAWN);
src/position.cpp
+13 -13
View File
@@ -89,7 +89,7 @@ PieceType min_attacker<KING>(const Bitboard*, const Square&, const Bitboard&, Bi
CheckInfo::CheckInfo(const Position& pos) { CheckInfo::CheckInfo(const Position& pos) {
Color them = ~pos.side_to_move(); Color them = ~pos.side_to_move();
ksq = pos.king_square(them); ksq = pos.square<KING>(them);
pinned = pos.pinned_pieces(pos.side_to_move()); pinned = pos.pinned_pieces(pos.side_to_move());
dcCandidates = pos.discovered_check_candidates(); dcCandidates = pos.discovered_check_candidates();
@@ -315,7 +315,7 @@ void Position::set(const string& fenStr, bool isChess960, Thread* th) {
void Position::set_castling_right(Color c, Square rfrom) { void Position::set_castling_right(Color c, Square rfrom) {
Square kfrom = king_square(c); Square kfrom = square<KING>(c);
CastlingSide cs = kfrom < rfrom ? KING_SIDE : QUEEN_SIDE; CastlingSide cs = kfrom < rfrom ? KING_SIDE : QUEEN_SIDE;
CastlingRight cr = (c | cs); CastlingRight cr = (c | cs);
@@ -348,7 +348,7 @@ void Position::set_state(StateInfo* si) const {
si->nonPawnMaterial[WHITE] = si->nonPawnMaterial[BLACK] = VALUE_ZERO; si->nonPawnMaterial[WHITE] = si->nonPawnMaterial[BLACK] = VALUE_ZERO;
si->psq = SCORE_ZERO; si->psq = SCORE_ZERO;
si->checkersBB = attackers_to(king_square(sideToMove)) & pieces(~sideToMove); si->checkersBB = attackers_to(square<KING>(sideToMove)) & pieces(~sideToMove);
for (Bitboard b = pieces(); b; ) for (Bitboard b = pieces(); b; )
{ {
@@ -456,7 +456,7 @@ Phase Position::game_phase() const {
Bitboard Position::check_blockers(Color c, Color kingColor) const { Bitboard Position::check_blockers(Color c, Color kingColor) const {
Bitboard b, pinners, result = 0; Bitboard b, pinners, result = 0;
Square ksq = king_square(kingColor); Square ksq = square<KING>(kingColor);
// Pinners are sliders that give check when a pinned piece is removed // Pinners are sliders that give check when a pinned piece is removed
pinners = ( (pieces( ROOK, QUEEN) & PseudoAttacks[ROOK ][ksq]) pinners = ( (pieces( ROOK, QUEEN) & PseudoAttacks[ROOK ][ksq])
@@ -498,14 +498,14 @@ bool Position::legal(Move m, Bitboard pinned) const {
Square from = from_sq(m); Square from = from_sq(m);
assert(color_of(moved_piece(m)) == us); assert(color_of(moved_piece(m)) == us);
assert(piece_on(king_square(us)) == make_piece(us, KING)); assert(piece_on(square<KING>(us)) == make_piece(us, KING));
// En passant captures are a tricky special case. Because they are rather // En passant captures are a tricky special case. Because they are rather
// uncommon, we do it simply by testing whether the king is attacked after // uncommon, we do it simply by testing whether the king is attacked after
// the move is made. // the move is made.
if (type_of(m) == ENPASSANT) if (type_of(m) == ENPASSANT)
{ {
Square ksq = king_square(us); Square ksq = square<KING>(us);
Square to = to_sq(m); Square to = to_sq(m);
Square capsq = to - pawn_push(us); Square capsq = to - pawn_push(us);
Bitboard occupied = (pieces() ^ from ^ capsq) | to; Bitboard occupied = (pieces() ^ from ^ capsq) | to;
@@ -529,7 +529,7 @@ bool Position::legal(Move m, Bitboard pinned) const {
// is moving along the ray towards or away from the king. // is moving along the ray towards or away from the king.
return !pinned return !pinned
|| !(pinned & from) || !(pinned & from)
|| aligned(from, to_sq(m), king_square(us)); || aligned(from, to_sq(m), square<KING>(us));
} }
@@ -592,7 +592,7 @@ bool Position::pseudo_legal(const Move m) const {
return false; return false;
// Our move must be a blocking evasion or a capture of the checking piece // Our move must be a blocking evasion or a capture of the checking piece
if (!((between_bb(lsb(checkers()), king_square(us)) | checkers()) & to)) if (!((between_bb(lsb(checkers()), square<KING>(us)) | checkers()) & to))
return false; return false;
} }
// In case of king moves under check we have to remove king so as to catch // In case of king moves under check we have to remove king so as to catch
@@ -826,7 +826,7 @@ void Position::do_move(Move m, StateInfo& newSt, bool givesCheck) {
st->key = k; st->key = k;
// Calculate checkers bitboard (if move gives check) // Calculate checkers bitboard (if move gives check)
st->checkersBB = givesCheck ? attackers_to(king_square(them)) & pieces(us) : 0; st->checkersBB = givesCheck ? attackers_to(square<KING>(them)) & pieces(us) : 0;
sideToMove = ~sideToMove; sideToMove = ~sideToMove;
@@ -1133,8 +1133,8 @@ bool Position::pos_is_ok(int* failedStep) const {
if (step == Default) if (step == Default)
if ( (sideToMove != WHITE && sideToMove != BLACK) if ( (sideToMove != WHITE && sideToMove != BLACK)
|| piece_on(king_square(WHITE)) != W_KING || piece_on(square<KING>(WHITE)) != W_KING
|| piece_on(king_square(BLACK)) != B_KING || piece_on(square<KING>(BLACK)) != B_KING
|| ( ep_square() != SQ_NONE || ( ep_square() != SQ_NONE
&& relative_rank(sideToMove, ep_square()) != RANK_6)) && relative_rank(sideToMove, ep_square()) != RANK_6))
return false; return false;
@@ -1142,7 +1142,7 @@ bool Position::pos_is_ok(int* failedStep) const {
if (step == King) if (step == King)
if ( std::count(board, board + SQUARE_NB, W_KING) != 1 if ( std::count(board, board + SQUARE_NB, W_KING) != 1
|| std::count(board, board + SQUARE_NB, B_KING) != 1 || std::count(board, board + SQUARE_NB, B_KING) != 1
|| attackers_to(king_square(~sideToMove)) & pieces(sideToMove)) || attackers_to(square<KING>(~sideToMove)) & pieces(sideToMove))
return false; return false;
if (step == Bitboards) if (step == Bitboards)
@@ -1187,7 +1187,7 @@ bool Position::pos_is_ok(int* failedStep) const {
if ( piece_on(castlingRookSquare[c | s]) != make_piece(c, ROOK) if ( piece_on(castlingRookSquare[c | s]) != make_piece(c, ROOK)
|| castlingRightsMask[castlingRookSquare[c | s]] != (c | s) || castlingRightsMask[castlingRookSquare[c | s]] != (c | s)
||(castlingRightsMask[king_square(c)] & (c | s)) != (c | s)) ||(castlingRightsMask[square<KING>(c)] & (c | s)) != (c | s))
return false; return false;
} }
} }
src/position.h
+7 -6
View File
@@ -105,11 +105,11 @@ public:
Bitboard pieces(Color c, PieceType pt) const; Bitboard pieces(Color c, PieceType pt) const;
Bitboard pieces(Color c, PieceType pt1, PieceType pt2) const; Bitboard pieces(Color c, PieceType pt1, PieceType pt2) const;
Piece piece_on(Square s) const; Piece piece_on(Square s) const;
Square king_square(Color c) const;
Square ep_square() const; Square ep_square() const;
bool empty(Square s) const; bool empty(Square s) const;
template<PieceType Pt> int count(Color c) const; template<PieceType Pt> int count(Color c) const;
template<PieceType Pt> const Square* list(Color c) const; template<PieceType Pt> const Square* squares(Color c) const;
template<PieceType Pt> Square square(Color c) const;
// Castling // Castling
int can_castle(Color c) const; int can_castle(Color c) const;
@@ -254,12 +254,13 @@ template<PieceType Pt> inline int Position::count(Color c) const {
return pieceCount[c][Pt]; return pieceCount[c][Pt];
} }
template<PieceType Pt> inline const Square* Position::list(Color c) const { template<PieceType Pt> inline const Square* Position::squares(Color c) const {
return pieceList[c][Pt]; return pieceList[c][Pt];
} }
inline Square Position::king_square(Color c) const { template<PieceType Pt> inline Square Position::square(Color c) const {
return pieceList[c][KING][0]; assert(pieceCount[c][Pt] == 1);
return pieceList[c][Pt][0];
} }
inline Square Position::ep_square() const { inline Square Position::ep_square() const {
@@ -362,7 +363,7 @@ inline void Position::set_nodes_searched(uint64_t n) {
inline bool Position::opposite_bishops() const { inline bool Position::opposite_bishops() const {
return pieceCount[WHITE][BISHOP] == 1 return pieceCount[WHITE][BISHOP] == 1
&& pieceCount[BLACK][BISHOP] == 1 && pieceCount[BLACK][BISHOP] == 1
&& opposite_colors(pieceList[WHITE][BISHOP][0], pieceList[BLACK][BISHOP][0]); && opposite_colors(square<BISHOP>(WHITE), square<BISHOP>(BLACK));
} }
inline bool Position::is_chess960() const { inline bool Position::is_chess960() const {