mirror of
https://github.com/HChaZZY/Stockfish.git
synced 2025-12-20 00:56:39 +08:00
Introduce Eval namespace
Wrap evaluation related stuff and reshuffle a bit the code. No functional change. Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
201
src/evaluate.cpp
201
src/evaluate.cpp
@@ -29,8 +29,6 @@
|
||||
#include "thread.h"
|
||||
#include "ucioption.h"
|
||||
|
||||
Color EvalRootColor;
|
||||
|
||||
namespace {
|
||||
|
||||
// Struct EvalInfo contains various information computed and collected
|
||||
@@ -221,8 +219,8 @@ namespace {
|
||||
std::stringstream TraceStream;
|
||||
|
||||
enum TracedType {
|
||||
PST = 8, IMBALANCE = 9, MOBILITY = 10, THREAT = 11,
|
||||
PASSED = 12, UNSTOPPABLE = 13, SPACE = 14, TOTAL = 15
|
||||
PST = 8, IMBALANCE = 9, MOBILITY = 10, THREAT = 11,
|
||||
PASSED = 12, UNSTOPPABLE = 13, SPACE = 14, TOTAL = 15
|
||||
};
|
||||
|
||||
// Function prototypes
|
||||
@@ -254,13 +252,102 @@ namespace {
|
||||
Score weight_option(const std::string& mgOpt, const std::string& egOpt, Score internalWeight);
|
||||
double to_cp(Value v);
|
||||
void trace_add(int idx, Score term_w, Score term_b = SCORE_ZERO);
|
||||
void trace_row(const char* name, int idx);
|
||||
}
|
||||
|
||||
|
||||
/// evaluate() is the main evaluation function. It always computes two
|
||||
/// values, an endgame score and a middle game score, and interpolates
|
||||
/// between them based on the remaining material.
|
||||
Value evaluate(const Position& pos, Value& margin) { return do_evaluate<false>(pos, margin); }
|
||||
namespace Eval {
|
||||
|
||||
Color RootColor;
|
||||
|
||||
/// evaluate() is the main evaluation function. It always computes two
|
||||
/// values, an endgame score and a middle game score, and interpolates
|
||||
/// between them based on the remaining material.
|
||||
|
||||
Value evaluate(const Position& pos, Value& margin) {
|
||||
return do_evaluate<false>(pos, margin);
|
||||
}
|
||||
|
||||
|
||||
/// init() computes evaluation weights from the corresponding UCI parameters
|
||||
/// and setup king tables.
|
||||
|
||||
void init() {
|
||||
|
||||
Weights[Mobility] = weight_option("Mobility (Middle Game)", "Mobility (Endgame)", WeightsInternal[Mobility]);
|
||||
Weights[PassedPawns] = weight_option("Passed Pawns (Middle Game)", "Passed Pawns (Endgame)", WeightsInternal[PassedPawns]);
|
||||
Weights[Space] = weight_option("Space", "Space", WeightsInternal[Space]);
|
||||
Weights[KingDangerUs] = weight_option("Cowardice", "Cowardice", WeightsInternal[KingDangerUs]);
|
||||
Weights[KingDangerThem] = weight_option("Aggressiveness", "Aggressiveness", WeightsInternal[KingDangerThem]);
|
||||
|
||||
// King safety is asymmetrical. Our king danger level is weighted by
|
||||
// "Cowardice" UCI parameter, instead the opponent one by "Aggressiveness".
|
||||
// If running in analysis mode, make sure we use symmetrical king safety. We
|
||||
// do this by replacing both Weights[kingDangerUs] and Weights[kingDangerThem]
|
||||
// by their average.
|
||||
if (Options["UCI_AnalyseMode"])
|
||||
Weights[KingDangerUs] = Weights[KingDangerThem] = (Weights[KingDangerUs] + Weights[KingDangerThem]) / 2;
|
||||
|
||||
const int MaxSlope = 30;
|
||||
const int Peak = 1280;
|
||||
|
||||
for (int t = 0, i = 1; i < 100; i++)
|
||||
{
|
||||
t = std::min(Peak, std::min(int(0.4 * i * i), t + MaxSlope));
|
||||
|
||||
KingDangerTable[1][i] = apply_weight(make_score(t, 0), Weights[KingDangerUs]);
|
||||
KingDangerTable[0][i] = apply_weight(make_score(t, 0), Weights[KingDangerThem]);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/// trace() is like evaluate() but instead of a value returns a string suitable
|
||||
/// to be print on stdout with the detailed descriptions and values of each
|
||||
/// evaluation term. Used mainly for debugging.
|
||||
|
||||
std::string trace(const Position& pos) {
|
||||
|
||||
Value margin;
|
||||
std::string totals;
|
||||
|
||||
RootColor = pos.side_to_move();
|
||||
|
||||
TraceStream.str("");
|
||||
TraceStream << std::showpoint << std::showpos << std::fixed << std::setprecision(2);
|
||||
memset(TracedScores, 0, 2 * 16 * sizeof(Score));
|
||||
|
||||
do_evaluate<true>(pos, margin);
|
||||
|
||||
totals = TraceStream.str();
|
||||
TraceStream.str("");
|
||||
|
||||
TraceStream << std::setw(21) << "Eval term " << "| White | Black | Total \n"
|
||||
<< " | MG EG | MG EG | MG EG \n"
|
||||
<< "---------------------+-------------+-------------+---------------\n";
|
||||
|
||||
trace_row("Material, PST, Tempo", PST);
|
||||
trace_row("Material imbalance", IMBALANCE);
|
||||
trace_row("Pawns", PAWN);
|
||||
trace_row("Knights", KNIGHT);
|
||||
trace_row("Bishops", BISHOP);
|
||||
trace_row("Rooks", ROOK);
|
||||
trace_row("Queens", QUEEN);
|
||||
trace_row("Mobility", MOBILITY);
|
||||
trace_row("King safety", KING);
|
||||
trace_row("Threats", THREAT);
|
||||
trace_row("Passed pawns", PASSED);
|
||||
trace_row("Unstoppable pawns", UNSTOPPABLE);
|
||||
trace_row("Space", SPACE);
|
||||
|
||||
TraceStream << "---------------------+-------------+-------------+---------------\n";
|
||||
trace_row("Total", TOTAL);
|
||||
TraceStream << totals;
|
||||
|
||||
return TraceStream.str();
|
||||
}
|
||||
|
||||
} // namespace Eval
|
||||
|
||||
|
||||
namespace {
|
||||
|
||||
@@ -387,49 +474,6 @@ Value do_evaluate(const Position& pos, Value& margin) {
|
||||
return pos.side_to_move() == WHITE ? v : -v;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
|
||||
/// eval_init() reads evaluation weights from the corresponding UCI parameters
|
||||
/// and setup weights and tables.
|
||||
void eval_init() {
|
||||
|
||||
const Value MaxSlope = Value(30);
|
||||
const Value Peak = Value(1280);
|
||||
Value t[100];
|
||||
|
||||
// King safety is asymmetrical. Our king danger level is weighted by
|
||||
// "Cowardice" UCI parameter, instead the opponent one by "Aggressiveness".
|
||||
Weights[Mobility] = weight_option("Mobility (Middle Game)", "Mobility (Endgame)", WeightsInternal[Mobility]);
|
||||
Weights[PassedPawns] = weight_option("Passed Pawns (Middle Game)", "Passed Pawns (Endgame)", WeightsInternal[PassedPawns]);
|
||||
Weights[Space] = weight_option("Space", "Space", WeightsInternal[Space]);
|
||||
Weights[KingDangerUs] = weight_option("Cowardice", "Cowardice", WeightsInternal[KingDangerUs]);
|
||||
Weights[KingDangerThem] = weight_option("Aggressiveness", "Aggressiveness", WeightsInternal[KingDangerThem]);
|
||||
|
||||
// If running in analysis mode, make sure we use symmetrical king safety. We do this
|
||||
// by replacing both Weights[kingDangerUs] and Weights[kingDangerThem] by their average.
|
||||
if (Options["UCI_AnalyseMode"])
|
||||
Weights[KingDangerUs] = Weights[KingDangerThem] = (Weights[KingDangerUs] + Weights[KingDangerThem]) / 2;
|
||||
|
||||
// First setup the base table
|
||||
for (int i = 0; i < 100; i++)
|
||||
{
|
||||
t[i] = Value(int(0.4 * i * i));
|
||||
|
||||
if (i > 0)
|
||||
t[i] = std::min(t[i], t[i - 1] + MaxSlope);
|
||||
|
||||
t[i] = std::min(t[i], Peak);
|
||||
}
|
||||
|
||||
// Then apply the weights and get the final KingDangerTable[] array
|
||||
for (Color c = WHITE; c <= BLACK; c++)
|
||||
for (int i = 0; i < 100; i++)
|
||||
KingDangerTable[c == WHITE][i] = apply_weight(make_score(t[i], 0), Weights[KingDangerUs + c]);
|
||||
}
|
||||
|
||||
|
||||
namespace {
|
||||
|
||||
// init_eval_info() initializes king bitboards for given color adding
|
||||
// pawn attacks. To be done at the beginning of the evaluation.
|
||||
@@ -785,8 +829,8 @@ namespace {
|
||||
// value that will be used for pruning because this value can sometimes
|
||||
// be very big, and so capturing a single attacking piece can therefore
|
||||
// result in a score change far bigger than the value of the captured piece.
|
||||
score -= KingDangerTable[Us == EvalRootColor][attackUnits];
|
||||
margins[Us] += mg_value(KingDangerTable[Us == EvalRootColor][attackUnits]);
|
||||
score -= KingDangerTable[Us == Eval::RootColor][attackUnits];
|
||||
margins[Us] += mg_value(KingDangerTable[Us == Eval::RootColor][attackUnits]);
|
||||
}
|
||||
|
||||
if (Trace)
|
||||
@@ -1126,14 +1170,15 @@ namespace {
|
||||
|
||||
void trace_add(int idx, Score wScore, Score bScore) {
|
||||
|
||||
TracedScores[WHITE][idx] = wScore;
|
||||
TracedScores[BLACK][idx] = bScore;
|
||||
TracedScores[WHITE][idx] = wScore;
|
||||
TracedScores[BLACK][idx] = bScore;
|
||||
}
|
||||
|
||||
|
||||
// trace_row() is an helper function used by tracing code to register the
|
||||
// values of a single evaluation term.
|
||||
|
||||
void trace_row(const char *name, int idx) {
|
||||
void trace_row(const char* name, int idx) {
|
||||
|
||||
Score wScore = TracedScores[WHITE][idx];
|
||||
Score bScore = TracedScores[BLACK][idx];
|
||||
@@ -1156,47 +1201,3 @@ namespace {
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/// trace_evaluate() is like evaluate() but instead of a value returns a string
|
||||
/// suitable to be print on stdout with the detailed descriptions and values of
|
||||
/// each evaluation term. Used mainly for debugging.
|
||||
|
||||
std::string trace_evaluate(const Position& pos) {
|
||||
|
||||
Value margin;
|
||||
std::string totals;
|
||||
|
||||
TraceStream.str("");
|
||||
TraceStream << std::showpoint << std::showpos << std::fixed << std::setprecision(2);
|
||||
memset(TracedScores, 0, 2 * 16 * sizeof(Score));
|
||||
|
||||
do_evaluate<true>(pos, margin);
|
||||
|
||||
totals = TraceStream.str();
|
||||
TraceStream.str("");
|
||||
|
||||
TraceStream << std::setw(21) << "Eval term " << "| White | Black | Total \n"
|
||||
<< " | MG EG | MG EG | MG EG \n"
|
||||
<< "---------------------+-------------+-------------+---------------\n";
|
||||
|
||||
trace_row("Material, PST, Tempo", PST);
|
||||
trace_row("Material imbalance", IMBALANCE);
|
||||
trace_row("Pawns", PAWN);
|
||||
trace_row("Knights", KNIGHT);
|
||||
trace_row("Bishops", BISHOP);
|
||||
trace_row("Rooks", ROOK);
|
||||
trace_row("Queens", QUEEN);
|
||||
trace_row("Mobility", MOBILITY);
|
||||
trace_row("King safety", KING);
|
||||
trace_row("Threats", THREAT);
|
||||
trace_row("Passed pawns", PASSED);
|
||||
trace_row("Unstoppable pawns", UNSTOPPABLE);
|
||||
trace_row("Space", SPACE);
|
||||
|
||||
TraceStream << "---------------------+-------------+-------------+---------------\n";
|
||||
trace_row("Total", TOTAL);
|
||||
TraceStream << totals;
|
||||
|
||||
return TraceStream.str();
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user