/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <string>
#include "evaluate.h"
-#include "notation.h"
+#include "movegen.h"
#include "position.h"
#include "search.h"
#include "thread.h"
#include "tt.h"
-#include "ucioption.h"
+#include "uci.h"
using namespace std;
// FEN string of the initial position, normal chess
const char* StartFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
- // Keep track of position keys along the setup moves (from start position to the
- // position just before to start searching). Needed by repetition draw detection.
+ // Keep a track of the position keys along the setup moves (from the start position
+ // to the position just before the search starts). This is needed by the repetition
+ // draw detection code.
Search::StateStackPtr SetupStates;
- void set_option(istringstream& up);
- void set_position(Position& pos, istringstream& up);
- void go(const Position& pos, istringstream& up);
-}
+
+ // position() is called when engine receives the "position" UCI command.
+ // The function sets up the position described in the given FEN string ("fen")
+ // or the starting position ("startpos") and then makes the moves given in the
+ // following move list ("moves").
+
+ void position(Position& pos, istringstream& is) {
+
+ Move m;
+ string token, fen;
+
+ is >> token;
+
+ if (token == "startpos")
+ {
+ fen = StartFEN;
+ is >> token; // Consume "moves" token if any
+ }
+ else if (token == "fen")
+ while (is >> token && token != "moves")
+ fen += token + " ";
+ else
+ return;
+
+ pos.set(fen, Options["UCI_Chess960"], Threads.main());
+ SetupStates = Search::StateStackPtr(new std::stack<StateInfo>());
+
+ // Parse move list (if any)
+ while (is >> token && (m = UCI::to_move(pos, token)) != MOVE_NONE)
+ {
+ SetupStates->push(StateInfo());
+ pos.do_move(m, SetupStates->top());
+ }
+ }
+
+
+ // setoption() is called when engine receives the "setoption" UCI command. The
+ // function updates the UCI option ("name") to the given value ("value").
+
+ void setoption(istringstream& is) {
+
+ string token, name, value;
+
+ is >> token; // Consume "name" token
+
+ // Read option name (can contain spaces)
+ while (is >> token && token != "value")
+ name += string(" ", !name.empty()) + token;
+
+ // Read option value (can contain spaces)
+ while (is >> token)
+ value += string(" ", !value.empty()) + token;
+
+ if (Options.count(name))
+ Options[name] = value;
+ else
+ sync_cout << "No such option: " << name << sync_endl;
+ }
+
+
+ // go() is called when engine receives the "go" UCI command. The function sets
+ // the thinking time and other parameters from the input string, and starts
+ // the search.
+
+ void go(const Position& pos, istringstream& is) {
+
+ Search::LimitsType limits;
+ string token;
+
+ while (is >> token)
+ {
+ if (token == "searchmoves")
+ while (is >> token)
+ limits.searchmoves.push_back(UCI::to_move(pos, token));
+
+ else if (token == "wtime") is >> limits.time[WHITE];
+ else if (token == "btime") is >> limits.time[BLACK];
+ else if (token == "winc") is >> limits.inc[WHITE];
+ else if (token == "binc") is >> limits.inc[BLACK];
+ else if (token == "movestogo") is >> limits.movestogo;
+ else if (token == "depth") is >> limits.depth;
+ else if (token == "nodes") is >> limits.nodes;
+ else if (token == "movetime") is >> limits.movetime;
+ else if (token == "mate") is >> limits.mate;
+ else if (token == "infinite") limits.infinite = true;
+ else if (token == "ponder") limits.ponder = true;
+ }
+
+ Threads.start_thinking(pos, limits, SetupStates);
+ }
+
+} // namespace
/// Wait for a command from the user, parse this text string as an UCI command,
/// that we exit gracefully if the GUI dies unexpectedly. In addition to the UCI
/// commands, the function also supports a few debug commands.
-void UCI::loop(const string& args) {
+void UCI::loop(int argc, char* argv[]) {
- Position pos(StartFEN, false, Threads.main_thread()); // The root position
- string token, cmd = args;
+ Position pos(StartFEN, false, Threads.main()); // The root position
+ string token, cmd;
+
+ for (int i = 1; i < argc; ++i)
+ cmd += std::string(argv[i]) + " ";
do {
- if (args.empty() && !getline(cin, cmd)) // Block here waiting for input
+ if (argc == 1 && !getline(cin, cmd)) // Block here waiting for input
cmd = "quit";
istringstream is(cmd);
if (token == "quit" || token == "stop" || token == "ponderhit")
{
- // GUI sends 'ponderhit' to tell us to ponder on the same move the
+ // The GUI sends 'ponderhit' to tell us to ponder on the same move the
// opponent has played. In case Signals.stopOnPonderhit is set we are
// waiting for 'ponderhit' to stop the search (for instance because we
// already ran out of time), otherwise we should continue searching but
- // switching from pondering to normal search.
+ // switch from pondering to normal search.
if (token != "ponderhit" || Search::Signals.stopOnPonderhit)
{
Search::Signals.stop = true;
- Threads.main_thread()->notify_one(); // Could be sleeping
+ Threads.main()->notify_one(); // Could be sleeping
}
else
Search::Limits.ponder = false;
}
- else if (token == "perft" && (is >> token)) // Read perft depth
+ else if (token == "perft")
{
+ int depth;
stringstream ss;
+ is >> depth;
ss << Options["Hash"] << " "
- << Options["Threads"] << " " << token << " current perft";
+ << Options["Threads"] << " " << depth << " current " << token;
benchmark(pos, ss);
}
<< "position key: " << setw(16) << pos.key()
<< "\nmaterial key: " << setw(16) << pos.material_key()
<< "\npawn key: " << setw(16) << pos.pawn_key()
- << dec << sync_endl;
+ << dec << nouppercase << setfill(' ') << sync_endl;
else if (token == "uci")
sync_cout << "id name " << engine_info(true)
else if (token == "ucinewgame") TT.clear();
else if (token == "go") go(pos, is);
- else if (token == "position") set_position(pos, is);
- else if (token == "setoption") set_option(is);
+ else if (token == "position") position(pos, is);
+ else if (token == "setoption") setoption(is);
else if (token == "flip") pos.flip();
else if (token == "bench") benchmark(pos, is);
else if (token == "d") sync_cout << pos.pretty() << sync_endl;
else
sync_cout << "Unknown command: " << cmd << sync_endl;
- } while (token != "quit" && args.empty()); // Args have one-shot behaviour
+ } while (token != "quit" && argc == 1); // Passed args have one-shot behaviour
- Threads.wait_for_think_finished(); // Cannot quit while search is running
+ Threads.wait_for_think_finished(); // Cannot quit whilst the search is running
}
-namespace {
+/// format_value() converts a Value to a string suitable for use with the UCI
+/// protocol specifications:
+///
+/// cp <x> The score from the engine's point of view in centipawns.
+/// mate <y> Mate in y moves, not plies. If the engine is getting mated
+/// use negative values for y.
- // set_position() is called when engine receives the "position" UCI command.
- // The function sets up the position described in the given fen string ("fen")
- // or the starting position ("startpos") and then makes the moves given in the
- // following move list ("moves").
+string UCI::format_value(Value v, Value alpha, Value beta) {
- void set_position(Position& pos, istringstream& is) {
+ stringstream ss;
- Move m;
- string token, fen;
+ if (abs(v) < VALUE_MATE_IN_MAX_PLY)
+ ss << "cp " << v * 100 / PawnValueEg;
+ else
+ ss << "mate " << (v > 0 ? VALUE_MATE - v + 1 : -VALUE_MATE - v) / 2;
- is >> token;
+ ss << (v >= beta ? " lowerbound" : v <= alpha ? " upperbound" : "");
- if (token == "startpos")
- {
- fen = StartFEN;
- is >> token; // Consume "moves" token if any
- }
- else if (token == "fen")
- while (is >> token && token != "moves")
- fen += token + " ";
- else
- return;
+ return ss.str();
+}
- pos.set(fen, Options["UCI_Chess960"], Threads.main_thread());
- SetupStates = Search::StateStackPtr(new std::stack<StateInfo>());
- // Parse move list (if any)
- while (is >> token && (m = move_from_uci(pos, token)) != MOVE_NONE)
- {
- SetupStates->push(StateInfo());
- pos.do_move(m, SetupStates->top());
- }
- }
+/// format_square() converts a Square to a string (g1, a7, etc.)
+std::string UCI::format_square(Square s) {
- // set_option() is called when engine receives the "setoption" UCI command. The
- // function updates the UCI option ("name") to the given value ("value").
+ char ch[] = { char('a' + file_of(s)),
+ char('1' + rank_of(s)), 0 }; // Zero-terminating
+ return ch;
+}
- void set_option(istringstream& is) {
- string token, name, value;
+/// format_move() converts a Move to a string in coordinate notation
+/// (g1f3, a7a8q, etc.). The only special case is castling moves, where we print
+/// in the e1g1 notation in normal chess mode, and in e1h1 notation in chess960
+/// mode. Internally castling moves are always encoded as "king captures rook".
- is >> token; // Consume "name" token
+string UCI::format_move(Move m, bool chess960) {
- // Read option name (can contain spaces)
- while (is >> token && token != "value")
- name += string(" ", !name.empty()) + token;
+ Square from = from_sq(m);
+ Square to = to_sq(m);
- // Read option value (can contain spaces)
- while (is >> token)
- value += string(" ", !value.empty()) + token;
+ if (m == MOVE_NONE)
+ return "(none)";
- if (Options.count(name))
- Options[name] = value;
- else
- sync_cout << "No such option: " << name << sync_endl;
- }
+ if (m == MOVE_NULL)
+ return "0000";
+ if (type_of(m) == CASTLING && !chess960)
+ to = make_square(to > from ? FILE_G : FILE_C, rank_of(from));
- // go() is called when engine receives the "go" UCI command. The function sets
- // the thinking time and other parameters from the input string, and starts
- // the search.
+ string move = format_square(from) + format_square(to);
- void go(const Position& pos, istringstream& is) {
+ if (type_of(m) == PROMOTION)
+ move += " pnbrqk"[promotion_type(m)];
- Search::LimitsType limits;
- vector<Move> searchMoves;
- string token;
+ return move;
+}
- while (is >> token)
- {
- if (token == "searchmoves")
- while (is >> token)
- searchMoves.push_back(move_from_uci(pos, token));
- else if (token == "wtime") is >> limits.time[WHITE];
- else if (token == "btime") is >> limits.time[BLACK];
- else if (token == "winc") is >> limits.inc[WHITE];
- else if (token == "binc") is >> limits.inc[BLACK];
- else if (token == "movestogo") is >> limits.movestogo;
- else if (token == "depth") is >> limits.depth;
- else if (token == "nodes") is >> limits.nodes;
- else if (token == "movetime") is >> limits.movetime;
- else if (token == "mate") is >> limits.mate;
- else if (token == "infinite") limits.infinite = true;
- else if (token == "ponder") limits.ponder = true;
- }
+/// to_move() takes a position and a string representing a move in
+/// simple coordinate notation and returns an equivalent legal Move if any.
- Threads.start_thinking(pos, limits, searchMoves, SetupStates);
- }
+Move UCI::to_move(const Position& pos, string& str) {
+
+ if (str.length() == 5) // Junior could send promotion piece in uppercase
+ str[4] = char(tolower(str[4]));
+
+ for (MoveList<LEGAL> it(pos); *it; ++it)
+ if (str == format_move(*it, pos.is_chess960()))
+ return *it;
+
+ return MOVE_NONE;
}
projects / stockfish / blobdiff