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Finish material.cpp cleanup
Hopefully no regression this time! Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
parent
73cce873de
commit
5e906ea10e
1 changed files with 125 additions and 176 deletions
301
src/material.cpp
301
src/material.cpp
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@ -37,20 +37,28 @@ namespace {
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const Value BishopPairMidgameBonus = Value(100);
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const Value BishopPairMidgameBonus = Value(100);
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const Value BishopPairEndgameBonus = Value(100);
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const Value BishopPairEndgameBonus = Value(100);
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Key KRPKRMaterialKey, KRKRPMaterialKey;
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Key KNNKMaterialKey, KKNNMaterialKey;
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Key KNNKMaterialKey, KKNNMaterialKey;
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Key KBPKBMaterialKey, KBKBPMaterialKey;
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struct ScalingInfo
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Key KBPKNMaterialKey, KNKBPMaterialKey;
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{
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Key KNPKMaterialKey, KKNPMaterialKey;
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Color col;
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Key KPKPMaterialKey;
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ScalingFunction* fun;
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Key KRPPKRPMaterialKey, KRPKRPPMaterialKey;
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};
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std::map<Key, EndgameEvaluationFunction*> EEFmap;
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std::map<Key, EndgameEvaluationFunction*> EEFmap;
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std::map<Key, ScalingInfo> ESFmap;
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void EEFAdd(Key k, EndgameEvaluationFunction* f) {
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void add(Key k, EndgameEvaluationFunction* f) {
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EEFmap.insert(std::pair<Key, EndgameEvaluationFunction*>(k, f));
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EEFmap.insert(std::pair<Key, EndgameEvaluationFunction*>(k, f));
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}
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}
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void add(Key k, Color c, ScalingFunction* f) {
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ScalingInfo s = {c, f};
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ESFmap.insert(std::pair<Key, ScalingInfo>(k, s));
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}
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}
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}
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@ -69,80 +77,42 @@ void MaterialInfo::init() {
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static const Color W = WHITE;
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static const Color W = WHITE;
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static const Color B = BLACK;
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static const Color B = BLACK;
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EEFAdd(z[W][PAWN][1], &EvaluateKPK);
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EEFAdd(z[B][PAWN][1], &EvaluateKKP);
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EEFAdd(z[W][BISHOP][1] ^ z[W][KNIGHT][1], &EvaluateKBNK);
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KNNKMaterialKey = z[W][KNIGHT][1] ^ z[W][KNIGHT][2];
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EEFAdd(z[B][BISHOP][1] ^ z[B][KNIGHT][1], &EvaluateKKBN);
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KKNNMaterialKey = z[B][KNIGHT][1] ^ z[B][KNIGHT][2];
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EEFAdd(z[W][ROOK][1] ^ z[B][PAWN][1], &EvaluateKRKP);
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EEFAdd(z[W][PAWN][1] ^ z[B][ROOK][1], &EvaluateKPKR);
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EEFAdd(z[W][ROOK][1] ^ z[B][BISHOP][1], &EvaluateKRKB);
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EEFAdd(z[W][BISHOP][1] ^ z[B][ROOK][1], &EvaluateKBKR);
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EEFAdd(z[W][ROOK][1] ^ z[B][KNIGHT][1], &EvaluateKRKN);
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EEFAdd(z[W][KNIGHT][1] ^ z[B][ROOK][1], &EvaluateKNKR);
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EEFAdd(z[W][QUEEN][1] ^ z[B][ROOK][1], &EvaluateKQKR);
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EEFAdd(z[W][ROOK][1] ^ z[B][QUEEN][1], &EvaluateKRKQ);
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KRPKRMaterialKey = z[W][ROOK][1]
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add(z[W][PAWN][1], &EvaluateKPK);
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^ z[W][PAWN][1]
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add(z[B][PAWN][1], &EvaluateKKP);
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^ z[B][ROOK][1];
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KRKRPMaterialKey = z[W][ROOK][1]
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add(z[W][BISHOP][1] ^ z[W][KNIGHT][1], &EvaluateKBNK);
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^ z[B][ROOK][1]
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add(z[B][BISHOP][1] ^ z[B][KNIGHT][1], &EvaluateKKBN);
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^ z[B][PAWN][1];
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add(z[W][ROOK][1] ^ z[B][PAWN][1], &EvaluateKRKP);
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add(z[W][PAWN][1] ^ z[B][ROOK][1], &EvaluateKPKR);
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add(z[W][ROOK][1] ^ z[B][BISHOP][1], &EvaluateKRKB);
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add(z[W][BISHOP][1] ^ z[B][ROOK][1], &EvaluateKBKR);
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add(z[W][ROOK][1] ^ z[B][KNIGHT][1], &EvaluateKRKN);
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add(z[W][KNIGHT][1] ^ z[B][ROOK][1], &EvaluateKNKR);
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add(z[W][QUEEN][1] ^ z[B][ROOK][1], &EvaluateKQKR);
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add(z[W][ROOK][1] ^ z[B][QUEEN][1], &EvaluateKRKQ);
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KRPPKRPMaterialKey =
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add(z[W][KNIGHT][1] ^ z[W][PAWN][1], W, &ScaleKNPK);
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z[W][ROOK][1] ^
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add(z[B][KNIGHT][1] ^ z[B][PAWN][1], B, &ScaleKKNP);
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z[W][PAWN][1] ^
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z[W][PAWN][2] ^
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z[B][ROOK][1] ^
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z[B][PAWN][1];
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KRPKRPPMaterialKey =
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z[W][ROOK][1] ^
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z[W][PAWN][1] ^
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z[B][ROOK][1] ^
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z[B][PAWN][1] ^
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z[B][PAWN][2];
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KNNKMaterialKey =
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z[W][KNIGHT][1] ^
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z[W][KNIGHT][2];
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KKNNMaterialKey =
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z[B][KNIGHT][1] ^
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z[B][KNIGHT][2];
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KBPKBMaterialKey =
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z[W][BISHOP][1] ^
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z[W][PAWN][1] ^
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z[B][BISHOP][1];
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KBKBPMaterialKey =
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z[W][BISHOP][1] ^
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z[B][BISHOP][1] ^
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z[B][PAWN][1];
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KBPKNMaterialKey =
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z[W][BISHOP][1] ^
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z[W][PAWN][1] ^
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z[B][KNIGHT][1];
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KNKBPMaterialKey =
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z[W][KNIGHT][1] ^
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z[B][BISHOP][1] ^
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z[B][PAWN][1];
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KNPKMaterialKey =
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z[W][KNIGHT][1] ^
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z[W][PAWN][1];
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KKNPMaterialKey =
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z[B][KNIGHT][1] ^
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z[B][PAWN][1];
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KPKPMaterialKey =
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z[W][PAWN][1] ^
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z[B][PAWN][1];
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add(z[W][ROOK][1] ^ z[W][PAWN][1] ^ z[B][ROOK][1] , W, &ScaleKRPKR);
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add(z[W][ROOK][1] ^ z[B][ROOK][1] ^ z[B][PAWN][1] , B, &ScaleKRKRP);
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add(z[W][BISHOP][1] ^ z[W][PAWN][1] ^ z[B][BISHOP][1], W, &ScaleKBPKB);
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add(z[W][BISHOP][1] ^ z[B][BISHOP][1] ^ z[B][PAWN][1] , B, &ScaleKBKBP);
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add(z[W][BISHOP][1] ^ z[W][PAWN][1] ^ z[B][KNIGHT][1], W, &ScaleKBPKN);
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add(z[W][KNIGHT][1] ^ z[B][BISHOP][1] ^ z[B][PAWN][1] , B, &ScaleKNKBP);
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add(z[W][ROOK][1] ^ z[W][PAWN][1] ^ z[W][PAWN][2] ^ z[B][ROOK][1] ^ z[B][PAWN][1], W, &ScaleKRPPKRP);
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add(z[W][ROOK][1] ^ z[W][PAWN][1] ^ z[B][ROOK][1] ^ z[B][PAWN][1] ^ z[B][PAWN][2], B, &ScaleKRPKRPP);
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}
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}
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/// Constructor for the MaterialInfoTable class.
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/// Constructor for the MaterialInfoTable class
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MaterialInfoTable::MaterialInfoTable(unsigned numOfEntries) {
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MaterialInfoTable::MaterialInfoTable(unsigned int numOfEntries) {
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size = numOfEntries;
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size = numOfEntries;
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entries = new MaterialInfo[size];
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entries = new MaterialInfo[size];
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@ -156,7 +126,7 @@ MaterialInfoTable::MaterialInfoTable(unsigned numOfEntries) {
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}
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}
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/// Destructor for the MaterialInfoTable class.
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/// Destructor for the MaterialInfoTable class
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MaterialInfoTable::~MaterialInfoTable() {
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MaterialInfoTable::~MaterialInfoTable() {
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@ -179,11 +149,11 @@ void MaterialInfoTable::clear() {
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/// is stored there, so we don't have to recompute everything when the
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/// is stored there, so we don't have to recompute everything when the
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/// same material configuration occurs again.
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/// same material configuration occurs again.
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MaterialInfo *MaterialInfoTable::get_material_info(const Position &pos) {
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MaterialInfo *MaterialInfoTable::get_material_info(const Position& pos) {
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Key key = pos.get_material_key();
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Key key = pos.get_material_key();
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int index = key & (size - 1);
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int index = key & (size - 1);
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MaterialInfo *mi = entries + index;
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MaterialInfo* mi = entries + index;
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// If mi->key matches the position's material hash key, it means that we
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// If mi->key matches the position's material hash key, it means that we
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// have analysed this material configuration before, and we can simply
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// have analysed this material configuration before, and we can simply
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@ -195,8 +165,8 @@ MaterialInfo *MaterialInfoTable::get_material_info(const Position &pos) {
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mi->clear();
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mi->clear();
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mi->key = key;
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mi->key = key;
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// A special case before looking for a specialized evaluation function:
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// A special case before looking for a specialized evaluation function
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// KNN vs K is a draw:
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// KNN vs K is a draw
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if (key == KNNKMaterialKey || key == KKNNMaterialKey)
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if (key == KNNKMaterialKey || key == KKNNMaterialKey)
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{
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{
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mi->factor[WHITE] = mi->factor[BLACK] = 0;
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mi->factor[WHITE] = mi->factor[BLACK] = 0;
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@ -233,112 +203,92 @@ MaterialInfo *MaterialInfoTable::get_material_info(const Position &pos) {
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// are several conflicting applicable scaling functions and we need to
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// are several conflicting applicable scaling functions and we need to
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// decide which one to use.
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// decide which one to use.
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if(key == KRPKRMaterialKey) {
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if (ESFmap.find(key) != ESFmap.end())
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mi->scalingFunction[WHITE] = &ScaleKRPKR;
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{
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return mi;
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mi->scalingFunction[ESFmap[key].col] = ESFmap[key].fun;
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}
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return mi;
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if(key == KRKRPMaterialKey) {
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mi->scalingFunction[BLACK] = &ScaleKRKRP;
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return mi;
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}
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if(key == KRPPKRPMaterialKey) {
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mi->scalingFunction[WHITE] = &ScaleKRPPKRP;
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return mi;
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}
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else if(key == KRPKRPPMaterialKey) {
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mi->scalingFunction[BLACK] = &ScaleKRPKRPP;
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return mi;
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}
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if(key == KBPKBMaterialKey) {
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mi->scalingFunction[WHITE] = &ScaleKBPKB;
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return mi;
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}
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if(key == KBKBPMaterialKey) {
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mi->scalingFunction[BLACK] = &ScaleKBKBP;
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return mi;
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}
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if(key == KBPKNMaterialKey) {
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mi->scalingFunction[WHITE] = &ScaleKBPKN;
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return mi;
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}
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if(key == KNKBPMaterialKey) {
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mi->scalingFunction[BLACK] = &ScaleKNKBP;
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return mi;
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}
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if(key == KNPKMaterialKey) {
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mi->scalingFunction[WHITE] = &ScaleKNPK;
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return mi;
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}
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if(key == KKNPMaterialKey) {
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mi->scalingFunction[BLACK] = &ScaleKKNP;
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return mi;
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}
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}
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if(pos.non_pawn_material(WHITE) == BishopValueMidgame &&
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if ( pos.non_pawn_material(WHITE) == BishopValueMidgame
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pos.piece_count(WHITE, BISHOP) == 1 && pos.piece_count(WHITE, PAWN) >= 1)
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&& pos.piece_count(WHITE, BISHOP) == 1
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mi->scalingFunction[WHITE] = &ScaleKBPK;
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&& pos.piece_count(WHITE, PAWN) >= 1)
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if(pos.non_pawn_material(BLACK) == BishopValueMidgame &&
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mi->scalingFunction[WHITE] = &ScaleKBPK;
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pos.piece_count(BLACK, BISHOP) == 1 && pos.piece_count(BLACK, PAWN) >= 1)
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mi->scalingFunction[BLACK] = &ScaleKKBP;
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if(pos.piece_count(WHITE, PAWN) == 0 &&
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if ( pos.non_pawn_material(BLACK) == BishopValueMidgame
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pos.non_pawn_material(WHITE) == QueenValueMidgame &&
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&& pos.piece_count(BLACK, BISHOP) == 1
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pos.piece_count(WHITE, QUEEN) == 1 &&
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&& pos.piece_count(BLACK, PAWN) >= 1)
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pos.piece_count(BLACK, ROOK) == 1 && pos.piece_count(BLACK, PAWN) >= 1)
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mi->scalingFunction[BLACK] = &ScaleKKBP;
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mi->scalingFunction[WHITE] = &ScaleKQKRP;
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else if(pos.piece_count(BLACK, PAWN) == 0 &&
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pos.non_pawn_material(BLACK) == QueenValueMidgame &&
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pos.piece_count(BLACK, QUEEN) == 1 &&
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pos.piece_count(WHITE, ROOK) == 1 && pos.piece_count(WHITE, PAWN) >= 1)
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mi->scalingFunction[BLACK] = &ScaleKRPKQ;
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if(pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK) == Value(0)) {
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if ( pos.piece_count(WHITE, PAWN) == 0
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if(pos.piece_count(BLACK, PAWN) == 0) {
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&& pos.non_pawn_material(WHITE) == QueenValueMidgame
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assert(pos.piece_count(WHITE, PAWN) >= 2);
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&& pos.piece_count(WHITE, QUEEN) == 1
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mi->scalingFunction[WHITE] = &ScaleKPsK;
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&& pos.piece_count(BLACK, ROOK) == 1
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}
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&& pos.piece_count(BLACK, PAWN) >= 1)
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else if(pos.piece_count(WHITE, PAWN) == 0) {
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mi->scalingFunction[WHITE] = &ScaleKQKRP;
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assert(pos.piece_count(BLACK, PAWN) >= 2);
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mi->scalingFunction[BLACK] = &ScaleKKPs;
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else if ( pos.piece_count(BLACK, PAWN) == 0
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}
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&& pos.non_pawn_material(BLACK) == QueenValueMidgame
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else if(pos.piece_count(WHITE, PAWN) == 1 && pos.piece_count(BLACK, PAWN) == 1) {
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&& pos.piece_count(BLACK, QUEEN) == 1
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mi->scalingFunction[WHITE] = &ScaleKPKPw;
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&& pos.piece_count(WHITE, ROOK) == 1
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mi->scalingFunction[BLACK] = &ScaleKPKPb;
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&& pos.piece_count(WHITE, PAWN) >= 1)
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}
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mi->scalingFunction[BLACK] = &ScaleKRPKQ;
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if (pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK) == Value(0))
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{
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if (pos.piece_count(BLACK, PAWN) == 0)
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{
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assert(pos.piece_count(WHITE, PAWN) >= 2);
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mi->scalingFunction[WHITE] = &ScaleKPsK;
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}
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else if (pos.piece_count(WHITE, PAWN) == 0)
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{
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assert(pos.piece_count(BLACK, PAWN) >= 2);
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mi->scalingFunction[BLACK] = &ScaleKKPs;
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}
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else if (pos.piece_count(WHITE, PAWN) == 1 && pos.piece_count(BLACK, PAWN) == 1)
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{
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mi->scalingFunction[WHITE] = &ScaleKPKPw;
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mi->scalingFunction[BLACK] = &ScaleKPKPb;
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}
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}
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}
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// Evaluate the material balance.
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// Evaluate the material balance
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Color c;
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Color c;
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int sign;
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int sign;
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Value egValue = Value(0), mgValue = Value(0);
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Value egValue = Value(0);
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Value mgValue = Value(0);
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for(c = WHITE, sign = 1; c <= BLACK; c++, sign = -sign) {
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for (c = WHITE, sign = 1; c <= BLACK; c++, sign = -sign)
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{
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// No pawns makes it difficult to win, even with a material advantage:
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// No pawns makes it difficult to win, even with a material advantage
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if(pos.piece_count(c, PAWN) == 0 &&
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if ( pos.piece_count(c, PAWN) == 0
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pos.non_pawn_material(c) - pos.non_pawn_material(opposite_color(c))
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&& pos.non_pawn_material(c) - pos.non_pawn_material(opposite_color(c)) <= BishopValueMidgame)
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<= BishopValueMidgame) {
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{
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if(pos.non_pawn_material(c) == pos.non_pawn_material(opposite_color(c)))
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if ( pos.non_pawn_material(c) == pos.non_pawn_material(opposite_color(c))
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mi->factor[c] = 0;
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|| pos.non_pawn_material(c) < RookValueMidgame)
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else if(pos.non_pawn_material(c) < RookValueMidgame)
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mi->factor[c] = 0;
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mi->factor[c] = 0;
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else
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else {
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{
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switch(pos.piece_count(c, BISHOP)) {
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switch (pos.piece_count(c, BISHOP)) {
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case 2:
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case 2:
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mi->factor[c] = 32; break;
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mi->factor[c] = 32;
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case 1:
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break;
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mi->factor[c] = 12; break;
|
case 1:
|
||||||
case 0:
|
mi->factor[c] = 12;
|
||||||
mi->factor[c] = 6; break;
|
break;
|
||||||
|
case 0:
|
||||||
|
mi->factor[c] = 6;
|
||||||
|
break;
|
||||||
|
}
|
||||||
}
|
}
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
// Bishop pair:
|
// Bishop pair
|
||||||
if(pos.piece_count(c, BISHOP) >= 2) {
|
if (pos.piece_count(c, BISHOP) >= 2)
|
||||||
mgValue += sign * BishopPairMidgameBonus;
|
{
|
||||||
egValue += sign * BishopPairEndgameBonus;
|
mgValue += sign * BishopPairMidgameBonus;
|
||||||
|
egValue += sign * BishopPairEndgameBonus;
|
||||||
}
|
}
|
||||||
|
|
||||||
// Knights are stronger when there are many pawns on the board. The
|
// Knights are stronger when there are many pawns on the board. The
|
||||||
|
|
@ -349,16 +299,15 @@ MaterialInfo *MaterialInfoTable::get_material_info(const Position &pos) {
|
||||||
egValue += sign * Value(pos.piece_count(c, KNIGHT)*(pos.piece_count(c, PAWN)-5)*16);
|
egValue += sign * Value(pos.piece_count(c, KNIGHT)*(pos.piece_count(c, PAWN)-5)*16);
|
||||||
|
|
||||||
// Redundancy of major pieces, again based on Kaufman's paper:
|
// Redundancy of major pieces, again based on Kaufman's paper:
|
||||||
if(pos.piece_count(c, ROOK) >= 1) {
|
if (pos.piece_count(c, ROOK) >= 1)
|
||||||
Value v = Value((pos.piece_count(c, ROOK) - 1) * 32 + pos.piece_count(c, QUEEN) * 16);
|
{
|
||||||
mgValue -= sign * v;
|
Value v = Value((pos.piece_count(c, ROOK) - 1) * 32 + pos.piece_count(c, QUEEN) * 16);
|
||||||
egValue -= sign * v;
|
mgValue -= sign * v;
|
||||||
|
egValue -= sign * v;
|
||||||
}
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
||||||
mi->mgValue = int16_t(mgValue);
|
mi->mgValue = int16_t(mgValue);
|
||||||
mi->egValue = int16_t(egValue);
|
mi->egValue = int16_t(egValue);
|
||||||
|
|
||||||
return mi;
|
return mi;
|
||||||
}
|
}
|
||||||
|
|
|
||||||
Loading…
Add table
Reference in a new issue