static void comp_move(int move) {
board_t board[1];
char string[256];
ASSERT(move_is_ok(move));
ASSERT(State->state==THINK);
ASSERT(!XB->analyse);
if(option_get_bool(Option,"RepeatPV"))
send_pv(); // to update time and nodes
// send the move
game_get_board(Game,board);
if (move_is_castle(move,board) && option_get_bool(Option,"Chess960")) {
if (!move_to_san(move,board,string,256)) my_fatal("comp_move(): move_to_san() failed\n"); // O-O/O-O-O
} else {
if (!move_to_can(move,board,string,256)) my_fatal("comp_move(): move_to_can() failed\n");
}
gui_send(GUI,"move %s",string);
// resign?
if (option_get_bool(Option,"Resign") && Uci->root_move_nb > 1) {
if (Uci->best_score <= -abs(option_get_int(Option,"ResignScore"))) {
State->resign_nb++;
my_log("POLYGLOT %d move%s with resign score\n",State->resign_nb,(State->resign_nb>1)?"s":"");
if (State->resign_nb >= option_get_int(Option,"ResignMoves")) {
my_log("POLYGLOT *** RESIGN ***\n");
gui_send(GUI,"resign");
}
} else {
if (State->resign_nb > 0) my_log("POLYGLOT resign reset (State->resign_nb=%d)\n",State->resign_nb);
State->resign_nb = 0;
}
}
// play the move
move_step(move);
no_mess(move);
}
bool move_is_legal(const Position& pos, const Move m, Bitboard pinned) {
assert(pos.is_ok());
assert(move_is_ok(m));
assert(pinned == pos.pinned_pieces(pos.side_to_move()));
Color us = pos.side_to_move();
Color them = opposite_color(us);
Square from = move_from(m);
Square to = move_to(m);
Piece pc = pos.piece_on(from);
// Use a slower but simpler function for uncommon cases
if (move_is_ep(m) || move_is_castle(m))
return move_is_legal(pos, m);
// If the from square is not occupied by a piece belonging to the side to
// move, the move is obviously not legal.
if (color_of_piece(pc) != us)
return false;
// The destination square cannot be occupied by a friendly piece
if (pos.color_of_piece_on(to) == us)
return false;
// Handle the special case of a pawn move
if (type_of_piece(pc) == PAWN)
{
// Move direction must be compatible with pawn color
int direction = to - from;
if ((us == WHITE) != (direction > 0))
return false;
// A pawn move is a promotion iff the destination square is
// on the 8/1th rank.
if (( (square_rank(to) == RANK_8 && us == WHITE)
||(square_rank(to) == RANK_1 && us != WHITE)) != bool(move_is_promotion(m)))
return false;
// Proceed according to the square delta between the origin and
// destination squares.
switch (direction)
{
case DELTA_NW:
case DELTA_NE:
case DELTA_SW:
case DELTA_SE:
// Capture. The destination square must be occupied by an enemy
// piece (en passant captures was handled earlier).
if (pos.color_of_piece_on(to) != them)
return false;
break;
case DELTA_N:
case DELTA_S:
// Pawn push. The destination square must be empty.
if (!pos.square_is_empty(to))
return false;
break;
case DELTA_NN:
// Double white pawn push. The destination square must be on the fourth
// rank, and both the destination square and the square between the
// source and destination squares must be empty.
if ( square_rank(to) != RANK_4
|| !pos.square_is_empty(to)
|| !pos.square_is_empty(from + DELTA_N))
return false;
break;
case DELTA_SS:
// Double black pawn push. The destination square must be on the fifth
// rank, and both the destination square and the square between the
// source and destination squares must be empty.
if ( square_rank(to) != RANK_5
|| !pos.square_is_empty(to)
|| !pos.square_is_empty(from + DELTA_S))
return false;
break;
default:
return false;
}
// The move is pseudo-legal, check if it is also legal
return pos.is_check() ? pos.pl_move_is_evasion(m, pinned) : pos.pl_move_is_legal(m, pinned);
}
// Luckly we can handle all the other pieces in one go
return bit_is_set(pos.attacks_from(pc, from), to)
&& (pos.is_check() ? pos.pl_move_is_evasion(m, pinned) : pos.pl_move_is_legal(m, pinned))
&& !move_is_promotion(m);
}
bool move_to_san(int move, const board_t * board, char string[], int size) {
int from, to, piece;
char tmp_string[256];
ASSERT(move_is_ok(move));
ASSERT(board_is_ok(board));
ASSERT(string!=NULL);
ASSERT(size>=8);
ASSERT(move_is_legal(move,board));
if (size < 8) return false;
// init
from = move_from(move);
to = move_to(move);
string[0] = '\0';
// castle
if (move_is_castle(move,board)) {
if (to > from) {
strcat(string,"O-O");
} else {
strcat(string,"O-O-O");
}
goto check;
}
// from
piece = board->square[from];
if (piece_is_pawn(piece)) {
// pawn
if (move_is_capture(move,board)) {
sprintf(tmp_string,"%c",file_to_char(square_file(from)));
strcat(string,tmp_string);
}
} else {
// piece
sprintf(tmp_string,"%c",toupper(piece_to_char(piece)));
strcat(string,tmp_string);
// ambiguity
switch (ambiguity(move,board)) {
case AMBIGUITY_NONE:
break;
case AMBIGUITY_FILE:
sprintf(tmp_string,"%c",file_to_char(square_file(from)));
strcat(string,tmp_string);
break;
case AMBIGUITY_RANK:
sprintf(tmp_string,"%c",rank_to_char(square_rank(from)));
strcat(string,tmp_string);
break;
case AMBIGUITY_SQUARE:
if (!square_to_string(from,tmp_string,256)) return false;
strcat(string,tmp_string);
break;
default:
ASSERT(false);
break;
}
}
// capture
if (move_is_capture(move,board)) strcat(string,"x");
// to
if (!square_to_string(to,tmp_string,256)) return false;
strcat(string,tmp_string);
// promote
if (move_is_promote(move)) {
sprintf(tmp_string,"=%c",toupper(piece_to_char(move_promote(move,board))));
strcat(string,tmp_string);
}
// check
check:
if (move_is_mate(move,board)) {
strcat(string,"#");
} else if (move_is_check(move,board)) {
strcat(string,"+");
}
return true;
}
static void comp_move(int move) {
board_t board[1];
char string[256];
ASSERT(move_is_ok(move));
ASSERT(State->state==THINK);
ASSERT(!XB->analyse);
if(option_get_bool("RepeatPV")==true)
send_pv(); // to update time and nodes
// send the move
game_get_board(Game,board);
if (move_is_castle(move,board) && option_get_bool("Chess960")) {
if (!move_to_san(move,board,string,sizeof(string))) my_fatal("comp_move(): move_to_san() failed\n"); // O-O/O-O-O
} else {
if (!move_to_can(move,board,string,sizeof(string))) my_fatal("comp_move(): move_to_can() failed\n");
}
move_step(move);
//game ended?
if(game_status(Game)!= PLAYING){
//handle ics drawing stuff
if(XB->ics){
switch (game_status(Game)){
case DRAW_MATERIAL:
case DRAW_FIFTY:
case DRAW_REPETITION:
xboard_send(XBoard,"offer draw");
break;
default:
break;
}
}
xboard_send(XBoard,"move %s",string);
board_update();
no_mess(move);
return;
}
// engine sended a move while in ponder mode?
if(State->state==PONDER){
if(board->turn==White)
xboard_send(XBoard,"0-1 {polyglot : engine moves while pondering}\n");
else
xboard_send(XBoard,"1-0 {polyglot : engine moves while pondering}\n");
}
// resign?
if (option_get_bool("Resign") && Uci->root_move_nb > 1) {
int best = Uci->best_score;
if (option_get_bool("ScoreWhite") && colour_is_black(Uci->board->turn))
best = -best;
if (best <= -abs(option_get_int("ResignScore"))) {
State->resign_nb++;
my_log("POLYGLOT %d move%s with resign score\n",State->resign_nb,(State->resign_nb>1)?"s":"");
if (State->resign_nb >= option_get_int("ResignMoves")) {
my_log("POLYGLOT *** RESIGN ***\n");
//send move and resign
//xboard_send(XBoard,"move %s \nresign",string);
//just resign
xboard_send(XBoard,"resign",string);
no_mess(move);
return;
}
} else {
if (State->resign_nb > 0) my_log("POLYGLOT resign reset (State->resign_nb=%d)\n",State->resign_nb);
State->resign_nb = 0;
}
}
no_mess(move);
xboard_send(XBoard,"move %s",string);
}