void board_from_fen(board_t * board, const char fen[]) {
int pos;
int file, rank, sq;
int c;
int i, len;
int piece;
int pawn;
ASSERT(board!=NULL);
ASSERT(fen!=NULL);
board_clear(board);
pos = 0;
c = fen[pos];
// piece placement
for (rank = Rank8; rank >= Rank1; rank--) {
for (file = FileA; file <= FileH;) {
if (c >= '1' && c <= '8') { // empty square(s)
len = c - '0';
for (i = 0; i < len; i++) {
if (file > FileH) my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
board->square[SQUARE_MAKE(file,rank)] = Empty;
file++;
}
} else { // piece
piece = piece_from_char(c);
if (piece == PieceNone256) my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
board->square[SQUARE_MAKE(file,rank)] = piece;
file++;
}
c = fen[++pos];
}
if (rank > Rank1) {
if (c != '/') my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
c = fen[++pos];
}
}
// active colour
if (c != ' ') my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
c = fen[++pos];
switch (c) {
case 'w':
board->turn = White;
break;
case 'b':
board->turn = Black;
break;
default:
my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
break;
}
c = fen[++pos];
// castling
if (c != ' ') my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
c = fen[++pos];
board->flags = FlagsNone;
if (c == '-') { // no castling rights
c = fen[++pos];
} else {
if (c == 'K') {
if (board->square[E1] == WK && board->square[H1] == WR) board->flags |= FlagsWhiteKingCastle;
c = fen[++pos];
}
if (c == 'Q') {
if (board->square[E1] == WK && board->square[A1] == WR) board->flags |= FlagsWhiteQueenCastle;
c = fen[++pos];
}
if (c == 'k') {
if (board->square[E8] == BK && board->square[H8] == BR) board->flags |= FlagsBlackKingCastle;
c = fen[++pos];
}
if (c == 'q') {
if (board->square[E8] == BK && board->square[A8] == BR) board->flags |= FlagsBlackQueenCastle;
c = fen[++pos];
}
}
// en-passant
if (c != ' ') my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
c = fen[++pos];
if (c == '-') { // no en-passant
sq = SquareNone;
c = fen[++pos];
} else {
if (c < 'a' || c > 'h') my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
file = file_from_char(c);
c = fen[++pos];
if (c != (COLOUR_IS_WHITE(board->turn) ? '6' : '3')) my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
rank = rank_from_char(c);
c = fen[++pos];
sq = SQUARE_MAKE(file,rank);
pawn = SQUARE_EP_DUAL(sq);
if (board->square[sq] != Empty
|| board->square[pawn] != PAWN_MAKE(COLOUR_OPP(board->turn))
|| (board->square[pawn-1] != PAWN_MAKE(board->turn)
&& board->square[pawn+1] != PAWN_MAKE(board->turn))) {
sq = SquareNone;
}
}
board->ep_square = sq;
// halfmove clock
board->ply_nb = 0;
if (c != ' ') {
if (!Strict) goto update;
my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
}
c = fen[++pos];
if (!isdigit(c)) {
if (!Strict) goto update;
my_fatal("board_from_fen(): bad FEN (pos=%d)\n",pos);
}
board->ply_nb = atoi(&fen[pos]);
// board update
update:
board_init_list(board);
}
static void parse_go(char string[]) {
const char * ptr;
bool infinite, ponder;
int depth, mate, movestogo;
sint64 nodes;
double binc, btime, movetime, winc, wtime;
double time, inc;
double time_max, alloc;
// init
infinite = false;
ponder = false;
depth = -1;
mate = -1;
movestogo = -1;
nodes = -1;
binc = -1.0;
btime = -1.0;
movetime = -1.0;
winc = -1.0;
wtime = -1.0;
// parse
ptr = strtok(string," "); // skip "go"
for (ptr = strtok(NULL," "); ptr != NULL; ptr = strtok(NULL," ")) {
if (false) {
} else if (string_equal(ptr,"binc")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
binc = double(atoi(ptr)) / 1000.0;
ASSERT(binc>=0.0);
} else if (string_equal(ptr,"btime")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
btime = double(atoi(ptr)) / 1000.0;
ASSERT(btime>=0.0);
} else if (string_equal(ptr,"depth")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
depth = atoi(ptr);
ASSERT(depth>=0);
} else if (string_equal(ptr,"infinite")) {
infinite = true;
} else if (string_equal(ptr,"mate")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
mate = atoi(ptr);
ASSERT(mate>=0);
} else if (string_equal(ptr,"movestogo")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
movestogo = atoi(ptr);
ASSERT(movestogo>=0);
} else if (string_equal(ptr,"movetime")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
movetime = double(atoi(ptr)) / 1000.0;
ASSERT(movetime>=0.0);
} else if (string_equal(ptr,"nodes")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
nodes = my_atoll(ptr);
ASSERT(nodes>=0);
} else if (string_equal(ptr,"ponder")) {
ponder = true;
} else if (string_equal(ptr,"searchmoves")) {
// dummy
} else if (string_equal(ptr,"winc")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
winc = double(atoi(ptr)) / 1000.0;
ASSERT(winc>=0.0);
} else if (string_equal(ptr,"wtime")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
wtime = double(atoi(ptr)) / 1000.0;
ASSERT(wtime>=0.0);
}
}
// init
search_clear();
// depth limit
// JAS
int option_depth = 0;
option_depth = option_get_int("Search Depth");
if (option_depth > 0) {
depth = option_depth;
}
// JAS end
if (depth >= 0) {
SearchInput->depth_is_limited = true;
SearchInput->depth_limit = depth;
} else if (mate >= 0) {
SearchInput->depth_is_limited = true;
SearchInput->depth_limit = mate * 2 - 1; // HACK: move -> ply
}
// time limit
if (COLOUR_IS_WHITE(SearchInput->board->turn)) {
time = wtime;
inc = winc;
} else {
time = btime;
inc = binc;
}
if (movestogo <= 0 || movestogo > 30) movestogo = 20; // HACK was 30
if (inc < 0.0) inc = 0.0;
// JAS
int option_movetime = 0;
option_movetime = option_get_int("Search Time");
if (option_movetime > 0) {
movetime = option_movetime;
}
// JAS end
if (movetime >= 0.0) {
// fixed time
SearchInput->time_is_limited = true;
SearchInput->time_limit_1 = movetime * 5.0; // HACK to avoid early exit
SearchInput->time_limit_2 = movetime;
} else if (time >= 0.0) {
// dynamic allocation
time_max = time * 0.95 - 1.0;
if (time_max < 0.0) time_max = 0.0;
SearchInput->time_is_limited = true;
alloc = (time_max + inc * double(movestogo-1)) / double(movestogo);
alloc *= (option_get_bool("Ponder") ? PonderRatio : NormalRatio);
if (alloc > time_max) alloc = time_max;
SearchInput->time_limit_1 = alloc;
alloc = (time_max + inc * double(movestogo-1)) * 0.5;
if (alloc < SearchInput->time_limit_1) alloc = SearchInput->time_limit_1;
if (alloc > time_max) alloc = time_max;
SearchInput->time_limit_2 = alloc;
}
if (infinite || ponder) SearchInput->infinite = true;
// search
ASSERT(!Searching);
ASSERT(!Delay);
Searching = true;
Infinite = infinite || ponder;
Delay = false;
search();
search_update_current();
ASSERT(Searching);
ASSERT(!Delay);
Searching = false;
Delay = Infinite;
if (!Delay) send_best_move();
}
void board_init_list(board_t * board) {
int sq_64, sq, piece;
int colour, pos;
int i, size;
int square;
int order;
int file;
ASSERT(board!=NULL);
// init
for (sq = 0; sq < SquareNb; sq++) {
board->pos[sq] = -1;
}
board->piece_nb = 0;
for (piece = 0; piece < 12; piece++) board->number[piece] = 0;
// piece lists
for (colour = 0; colour < ColourNb; colour++) {
// piece list
pos = 0;
for (sq_64 = 0; sq_64 < 64; sq_64++) {
sq = SQUARE_FROM_64(sq_64);
piece = board->square[sq];
if (piece != Empty && !piece_is_ok(piece)) my_fatal("board_init_list(): illegal position\n");
if (COLOUR_IS(piece,colour) && !PIECE_IS_PAWN(piece)) {
if (pos >= 16) my_fatal("board_init_list(): illegal position\n");
ASSERT(pos>=0&&pos<16);
board->pos[sq] = pos;
board->piece[colour][pos] = sq;
pos++;
board->piece_nb++;
board->number[PIECE_TO_12(piece)]++;
}
}
if (board->number[COLOUR_IS_WHITE(colour)?WhiteKing12:BlackKing12] != 1) my_fatal("board_init_list(): illegal position\n");
ASSERT(pos>=1&&pos<=16);
board->piece[colour][pos] = SquareNone;
board->piece_size[colour] = pos;
// MV sort
size = board->piece_size[colour];
for (i = 1; i < size; i++) {
square = board->piece[colour][i];
piece = board->square[square];
order = PIECE_ORDER(piece);
for (pos = i; pos > 0 && order > PIECE_ORDER(board->square[(sq=board->piece[colour][pos-1])]); pos--) {
ASSERT(pos>0&&pos<size);
board->piece[colour][pos] = sq;
ASSERT(board->pos[sq]==pos-1);
board->pos[sq] = pos;
}
ASSERT(pos>=0&&pos<size);
board->piece[colour][pos] = square;
ASSERT(board->pos[square]==i);
board->pos[square] = pos;
}
// debug
if (DEBUG) {
for (i = 0; i < board->piece_size[colour]; i++) {
sq = board->piece[colour][i];
ASSERT(board->pos[sq]==i);
if (i == 0) { // king
ASSERT(PIECE_IS_KING(board->square[sq]));
} else {
ASSERT(!PIECE_IS_KING(board->square[sq]));
ASSERT(PIECE_ORDER(board->square[board->piece[colour][i]])<=PIECE_ORDER(board->square[board->piece[colour][i-1]]));
}
}
}
// pawn list
for (file = 0; file < FileNb; file++) {
board->pawn_file[colour][file] = 0;
}
pos = 0;
for (sq_64 = 0; sq_64 < 64; sq_64++) {
sq = SQUARE_FROM_64(sq_64);
piece = board->square[sq];
if (COLOUR_IS(piece,colour) && PIECE_IS_PAWN(piece)) {
if (pos >= 8 || SQUARE_IS_PROMOTE(sq)) my_fatal("board_init_list(): illegal position\n");
ASSERT(pos>=0&&pos<8);
board->pos[sq] = pos;
board->pawn[colour][pos] = sq;
pos++;
board->piece_nb++;
board->number[PIECE_TO_12(piece)]++;
board->pawn_file[colour][SQUARE_FILE(sq)] |= BIT(PAWN_RANK(sq,colour));
}
}
ASSERT(pos>=0&&pos<=8);
board->pawn[colour][pos] = SquareNone;
board->pawn_size[colour] = pos;
if (board->piece_size[colour] + board->pawn_size[colour] > 16) my_fatal("board_init_list(): illegal position\n");
}
// last square
board->cap_sq = SquareNone;
// PST
board->opening = board_opening(board);
board->endgame = board_endgame(board);
// hash key
for (i = 0; i < board->ply_nb; i++) board->stack[i] = 0; // HACK
board->sp = board->ply_nb;
board->key = hash_key(board);
board->pawn_key = hash_pawn_key(board);
board->material_key = hash_material_key(board);
// legality
if (!board_is_legal(board)) my_fatal("board_init_list(): illegal position\n");
// debug
ASSERT(board_is_ok(board));
}
bool board_to_fen(const board_t * board, char fen[], int size) {
int pos;
int file, rank;
int sq, piece;
int c;
int len;
ASSERT(board!=NULL);
ASSERT(fen!=NULL);
ASSERT(size>=92);
// init
if (size < 92) return false;
pos = 0;
// piece placement
for (rank = Rank8; rank >= Rank1; rank--) {
for (file = FileA; file <= FileH;) {
sq = SQUARE_MAKE(file,rank);
piece = board->square[sq];
ASSERT(piece==Empty||piece_is_ok(piece));
if (piece == Empty) {
len = 0;
for (; file <= FileH && board->square[SQUARE_MAKE(file,rank)] == Empty; file++) {
len++;
}
ASSERT(len>=1&&len<=8);
c = '0' + len;
} else {
c = piece_to_char(piece);
file++;
}
fen[pos++] = c;
}
fen[pos++] = '/';
}
fen[pos-1] = ' '; // HACK: remove the last '/'
// active colour
fen[pos++] = (COLOUR_IS_WHITE(board->turn)) ? 'w' : 'b';
fen[pos++] = ' ';
// castling
if (board->flags == FlagsNone) {
fen[pos++] = '-';
} else {
if ((board->flags & FlagsWhiteKingCastle) != 0) fen[pos++] = 'K';
if ((board->flags & FlagsWhiteQueenCastle) != 0) fen[pos++] = 'Q';
if ((board->flags & FlagsBlackKingCastle) != 0) fen[pos++] = 'k';
if ((board->flags & FlagsBlackQueenCastle) != 0) fen[pos++] = 'q';
}
fen[pos++] = ' ';
// en-passant
if (board->ep_square == SquareNone) {
fen[pos++] = '-';
} else {
square_to_string(board->ep_square,&fen[pos],3);
pos += 2;
}
fen[pos++] = ' ';
// halfmove clock
sprintf(&fen[pos],"%d 1",board->ply_nb);
return true;
}
static void parse_go(char string[]) {
const char * ptr;
bool infinite, ponder;
int depth, mate, movestogo;
sint64 nodes;
double binc, btime, movetime, winc, wtime;
double time, inc;
// init
infinite = false;
ponder = false;
depth = -1;
mate = -1;
movestogo = -1;
nodes = -1;
binc = -1.0;
btime = -1.0;
movetime = -1.0;
winc = -1.0;
wtime = -1.0;
// parse
ptr = strtok(string," "); // skip "go"
for (ptr = strtok(NULL," "); ptr != NULL; ptr = strtok(NULL," ")) {
if (false) {
} else if (string_equal(ptr,"binc")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
binc = double(atoi(ptr)) / 1000.0;
ASSERT(binc>=0.0);
} else if (string_equal(ptr,"btime")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
btime = double(atoi(ptr)) / 1000.0;
ASSERT(btime>=0.0);
} else if (string_equal(ptr,"depth")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
depth = atoi(ptr);
ASSERT(depth>=0);
} else if (string_equal(ptr,"infinite")) {
infinite = true;
} else if (string_equal(ptr,"mate")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
mate = atoi(ptr);
ASSERT(mate>=0);
} else if (string_equal(ptr,"movestogo")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
movestogo = atoi(ptr);
ASSERT(movestogo>=0);
} else if (string_equal(ptr,"movetime")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
movetime = double(atoi(ptr)) / 1000.0;
ASSERT(movetime>=0.0);
} else if (string_equal(ptr,"nodes")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
nodes = my_atoll(ptr);
ASSERT(nodes>=0);
} else if (string_equal(ptr,"ponder")) {
ponder = true;
} else if (string_equal(ptr,"searchmoves")) {
// dummy
} else if (string_equal(ptr,"winc")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
winc = double(atoi(ptr)) / 1000.0;
ASSERT(winc>=0.0);
} else if (string_equal(ptr,"wtime")) {
ptr = strtok(NULL," ");
if (ptr == NULL) my_fatal("parse_go(): missing argument\n");
wtime = double(atoi(ptr)) / 1000.0;
ASSERT(wtime>=0.0);
}
}
// init
search_clear();
tb_clear();
egbb_clear();
eval_init_options();
// depth limit
if (depth >= 0) {
SearchInput->depth_is_limited = true;
SearchInput->depth_limit = depth;
} else if (mate >= 0) {
SearchInput->depth_is_limited = true;
SearchInput->depth_limit = mate * 2 - 1; // HACK: move -> ply
}
// nodes limit
if (nodes > 0) {
if (nodes < 1000) nodes = 1000;
SearchInput->nodes_is_limited = true;
SearchInput->nodes = nodes;
}
// time limit
if (COLOUR_IS_WHITE(SearchInput->board->turn)) {
time = wtime;
inc = winc;
} else {
time = btime;
inc = binc;
}
if (movestogo <= 0 || movestogo > 30) movestogo = 30; // HACK
if (inc < 0.0) inc = 0.0;
if (movetime >= 0.0) {
// fixed time
SearchInput->time_is_limited = true;
SearchInput->time_limit_1 = movetime * 5.0; // HACK to avoid early exit
SearchInput->time_limit_2 = movetime;
} else if (time >= 0.0) {
SearchInput->time_is_limited = true;
time_allocation(time,inc,movestogo);
}
if (infinite || ponder) SearchInput->infinite = true;
// search
ASSERT(!Searching);
ASSERT(!Delay);
Searching = true;
Infinite = infinite || ponder;
Delay = false;
search();
search_update_current();
ASSERT(Searching);
ASSERT(!Delay);
Searching = false;
Delay = Infinite;
if (!Delay) send_best_move();
}
static bool kpk_draw(int wp, int wk, int bk, int turn) {
int wp_file, wp_rank;
int wk_file;
int bk_file, bk_rank;
ASSERT(SQUARE_IS_OK(wp));
ASSERT(SQUARE_IS_OK(wk));
ASSERT(SQUARE_IS_OK(bk));
ASSERT(COLOUR_IS_OK(turn));
ASSERT(SQUARE_FILE(wp)<=FileD);
wp_file = SQUARE_FILE(wp);
wp_rank = SQUARE_RANK(wp);
wk_file = SQUARE_FILE(wk);
bk_file = SQUARE_FILE(bk);
bk_rank = SQUARE_RANK(bk);
if (false) {
} else if (bk == wp+16) {
if (wp_rank <= Rank6) {
return true;
} else {
ASSERT(wp_rank==Rank7);
if (COLOUR_IS_WHITE(turn)) {
if (wk == wp-15 || wk == wp-17) return true;
} else {
if (wk != wp-15 && wk != wp-17) return true;
}
}
} else if (bk == wp+32) {
if (wp_rank <= Rank5) {
return true;
} else {
ASSERT(wp_rank==Rank6);
if (COLOUR_IS_WHITE(turn)) {
if (wk != wp-1 && wk != wp+1) return true;
} else {
return true;
}
}
} else if (wk == wp-1 || wk == wp+1) {
if (bk == wk+32 && COLOUR_IS_WHITE(turn)) { // opposition
return true;
}
} else if (wk == wp+15 || wk == wp+16 || wk == wp+17) {
if (wp_rank <= Rank4) {
if (bk == wk+32 && COLOUR_IS_WHITE(turn)) { // opposition
return true;
}
}
}
// rook pawn
if (wp_file == FileA) {
if (DISTANCE(bk,A8) <= 1) return true;
if (wk_file == FileA) {
if (wp_rank == Rank2) wp_rank++; // HACK
if (bk_file == FileC && bk_rank > wp_rank) return true;
}
}
return false;
}
uint64 hash_turn_key(int colour) {
ASSERT(COLOUR_IS_OK(colour));
return (COLOUR_IS_WHITE(colour)) ? RANDOM_64(RandomTurn) : 0;
}
static void add_quiet_moves(list_t * list, const board_t * board) {
int me;
const sq_t * ptr;
int from, to;
int piece;
ASSERT(list!=NULL);
ASSERT(board!=NULL);
me = board->turn;
// piece moves
for (ptr = &board->piece[me][0]; (from=*ptr) != SquareNone; ptr++) {
piece = board->square[from];
switch (PIECE_TYPE(piece)) {
case Knight64:
to = from - 33;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 31;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 18;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 14;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 14;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 18;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 31;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 33;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
break;
case Bishop64:
for (to = from-17; board->square[to] == Empty; to -= 17) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from-15; board->square[to] == Empty; to -= 15) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from+15; board->square[to] == Empty; to += 15) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from+17; board->square[to] == Empty; to += 17) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
break;
case Rook64:
for (to = from-16; board->square[to] == Empty; to -= 16) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from-1; board->square[to] == Empty; to -= 1) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from+1; board->square[to] == Empty; to += 1) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from+16; board->square[to] == Empty; to += 16) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
break;
case Queen64:
for (to = from-17; board->square[to] == Empty; to -= 17) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from-16; board->square[to] == Empty; to -= 16) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from-15; board->square[to] == Empty; to -= 15) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from-1; board->square[to] == Empty; to -= 1) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from+1; board->square[to] == Empty; to += 1) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from+15; board->square[to] == Empty; to += 15) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from+16; board->square[to] == Empty; to += 16) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
for (to = from+17; board->square[to] == Empty; to += 17) {
LIST_ADD(list,MOVE_MAKE(from,to));
}
break;
case King64:
to = from - 17;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 16;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 15;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 1;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 1;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 15;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 16;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 17;
if (board->square[to] == Empty) LIST_ADD(list,MOVE_MAKE(from,to));
break;
default:
ASSERT(false);
break;
}
}
// pawn moves
if (COLOUR_IS_WHITE(me)) {
for (ptr = &board->pawn[me][0]; (from=*ptr) != SquareNone; ptr++) {
// non promotes
if (SQUARE_RANK(from) != Rank7) {
to = from + 16;
if (board->square[to] == Empty) {
ASSERT(!SQUARE_IS_PROMOTE(to));
LIST_ADD(list,MOVE_MAKE(from,to));
if (SQUARE_RANK(from) == Rank2) {
to = from + 32;
if (board->square[to] == Empty) {
ASSERT(!SQUARE_IS_PROMOTE(to));
LIST_ADD(list,MOVE_MAKE(from,to));
}
}
}
}
}
} else { // black
for (ptr = &board->pawn[me][0]; (from=*ptr) != SquareNone; ptr++) {
// non promotes
if (SQUARE_RANK(from) != Rank2) {
to = from - 16;
if (board->square[to] == Empty) {
ASSERT(!SQUARE_IS_PROMOTE(to));
LIST_ADD(list,MOVE_MAKE(from,to));
if (SQUARE_RANK(from) == Rank7) {
to = from - 32;
if (board->square[to] == Empty) {
ASSERT(!SQUARE_IS_PROMOTE(to));
LIST_ADD(list,MOVE_MAKE(from,to));
}
}
}
}
}
}
}
static void add_captures(list_t * list, const board_t * board) {
int me, opp;
int opp_flag;
const sq_t * ptr;
int from, to;
int piece, capture;
ASSERT(list!=NULL);
ASSERT(board!=NULL);
me = board->turn;
opp = COLOUR_OPP(me);
opp_flag = COLOUR_FLAG(opp);
// piece captures
for (ptr = &board->piece[me][0]; (from=*ptr) != SquareNone; ptr++) {
piece = board->square[from];
switch (PIECE_TYPE(piece)) {
case Knight64:
to = from - 33;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 31;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 18;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 14;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 14;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 18;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 31;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 33;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
break;
case Bishop64:
for (to = from-17; (capture=board->square[to]) == Empty; to -= 17)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from-15; (capture=board->square[to]) == Empty; to -= 15)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from+15; (capture=board->square[to]) == Empty; to += 15)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from+17; (capture=board->square[to]) == Empty; to += 17)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
break;
case Rook64:
for (to = from-16; (capture=board->square[to]) == Empty; to -= 16)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from-1; (capture=board->square[to]) == Empty; to -= 1)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from+1; (capture=board->square[to]) == Empty; to += 1)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from+16; (capture=board->square[to]) == Empty; to += 16)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
break;
case Queen64:
for (to = from-17; (capture=board->square[to]) == Empty; to -= 17)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from-16; (capture=board->square[to]) == Empty; to -= 16)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from-15; (capture=board->square[to]) == Empty; to -= 15)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from-1; (capture=board->square[to]) == Empty; to -= 1)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from+1; (capture=board->square[to]) == Empty; to += 1)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from+15; (capture=board->square[to]) == Empty; to += 15)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from+16; (capture=board->square[to]) == Empty; to += 16)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
for (to = from+17; (capture=board->square[to]) == Empty; to += 17)
;
if (FLAG_IS(capture,opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
break;
case King64:
to = from - 17;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 16;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 15;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from - 1;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 1;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 15;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 16;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
to = from + 17;
if (FLAG_IS(board->square[to],opp_flag)) LIST_ADD(list,MOVE_MAKE(from,to));
break;
default:
ASSERT(false);
break;
}
}
// pawn captures
if (COLOUR_IS_WHITE(me)) {
for (ptr = &board->pawn[me][0]; (from=*ptr) != SquareNone; ptr++) {
to = from + 15;
if (FLAG_IS(board->square[to],opp_flag)) add_pawn_move(list,from,to);
to = from + 17;
if (FLAG_IS(board->square[to],opp_flag)) add_pawn_move(list,from,to);
// promote
if (SQUARE_RANK(from) == Rank7) {
to = from + 16;
if (board->square[to] == Empty) {
add_promote(list,MOVE_MAKE(from,to));
}
}
}
} else { // black
for (ptr = &board->pawn[me][0]; (from=*ptr) != SquareNone; ptr++) {
to = from - 17;
if (FLAG_IS(board->square[to],opp_flag)) add_pawn_move(list,from,to);
to = from - 15;
if (FLAG_IS(board->square[to],opp_flag)) add_pawn_move(list,from,to);
// promote
if (SQUARE_RANK(from) == Rank2) {
to = from - 16;
if (board->square[to] == Empty) {
add_promote(list,MOVE_MAKE(from,to));
}
}
}
}
}
