bool
apply_move (Game *g, int from, int to, char promote_in)
{
if (g->result != IN_PROGRESS) return FALSE;
Board *board = current_board (g);
Board *new_board = NEW_BOARD;
char capture = 0;
char *move_done = castling (board, castling_type (board, from, to), new_board);
if (!move_done) // If move is not a castling
{
if (!try_move (board, from, to, promote_in, new_board, &move_done, &capture))
{
free (new_board);
return FALSE;
}
}
// Ok move is legal, update the game
update_castling (new_board, from);
update_en_passant (new_board, from, to);
if (new_board->active_color)
new_board->fullmove_number++;
new_board->active_color = !new_board->active_color;
if (capture || toupper (board->placement[from]) == 'P')
new_board->halfmove_clock = 0;
else
new_board->halfmove_clock++;
g->boards[g->current] = new_board;
g->moves[g->current] = move_done;
g->coord_moves[g->current] = ft_to_coord_move (from, to, promote_in);
g->current++;
// Test check or checkmate of opponent king
if (king_in_check (new_board, new_board->active_color))
{
if (king_in_checkmate (new_board, new_board->active_color))
{
strcat (move_done, "#");
g->result = !new_board->active_color;
}
else
strcat (move_done, "+");
}
// Test insufficient material
else if (insufficient_material (new_board))
g->result = DRAW;
// Test stalemate
else if (stalemate (new_board, new_board->active_color))
g->result = DRAW;
return TRUE;
}
void do_chess( CHAR_DATA * ch, const char *argument )
{
char arg[MAX_INPUT_LENGTH];
argument = one_argument( argument, arg );
if ( IS_NPC( ch ) )
{
send_to_char( "NPC's can't be in chess games.\r\n", ch );
return;
}
if ( !str_cmp( arg, "begin" ) )
{
GAME_BOARD_DATA *board;
if ( ch->pcdata->game_board )
{
send_to_char( "You are already in a chess match.\r\n", ch );
return;
}
CREATE( board, GAME_BOARD_DATA, 1 );
init_board( board );
ch->pcdata->game_board = board;
ch->pcdata->game_board->player1 = QUICKLINK( ch->name );
send_to_char( "You have started a game of chess.\r\n", ch );
return;
}
if ( !str_cmp( arg, "join" ) )
{
GAME_BOARD_DATA *board = NULL;
CHAR_DATA *vch;
char arg2[MAX_INPUT_LENGTH];
if ( ch->pcdata->game_board )
{
send_to_char( "You are already in a game of chess.\r\n", ch );
return;
}
argument = one_argument( argument, arg2 );
if ( arg2[0] == '\0' )
{
send_to_char( "Join whom in a chess match?\r\n", ch );
return;
}
#ifdef IMC
if ( strstr( arg2, "@" ) )
{
if ( !str_cmp( imc_mudof( arg2 ), this_imcmud->localname ) )
{
send_to_char( "You cannot join IMC chess on the local mud!\r\n", ch );
return;
}
if ( !str_cmp( imc_mudof( arg2 ), "*" ) )
{
send_to_char( "* is not a valid mud name.\r\n", ch );
return;
}
if ( !str_cmp( imc_nameof( arg2 ), "*" ) )
{
send_to_char( "* is not a valid player name.\r\n", ch );
return;
}
send_to_char( "Attempting to initiate IMC chess game...\r\n", ch );
CREATE( board, GAME_BOARD_DATA, 1 );
init_board( board );
board->type = TYPE_IMC;
board->player1 = QUICKLINK( ch->name );
board->player2 = STRALLOC( arg2 );
board->turn = -1;
ch->pcdata->game_board = board;
imc_send_chess( ch->name, arg2, "start" );
return;
}
#endif
if ( !( vch = get_char_world( ch, arg2 ) ) )
{
send_to_char( "Cannot find that player.\r\n", ch );
return;
}
if ( IS_NPC( vch ) )
{
send_to_char( "That player is an NPC, and cannot play games.\r\n", ch );
return;
}
board = vch->pcdata->game_board;
if ( !board )
{
send_to_char( "That player is not playing a game.\r\n", ch );
return;
}
if ( board->player2 )
{
send_to_char( "That game already has two players.\r\n", ch );
return;
}
board->player2 = QUICKLINK( ch->name );
ch->pcdata->game_board = board;
send_to_char( "You have joined a game of chess.\r\n", ch );
vch = get_char_world( ch, board->player1 );
ch_printf( vch, "%s has joined your game.\r\n", ch->name );
return;
}
if ( !ch->pcdata->game_board )
{
send_to_char( "Usage: chess <begin|cease|status|board|move|join>\r\n", ch );
return;
}
if ( !str_cmp( arg, "cease" ) )
{
free_game( ch->pcdata->game_board );
return;
}
if ( !str_cmp( arg, "status" ) )
{
GAME_BOARD_DATA *board = ch->pcdata->game_board;
if ( !board->player1 )
send_to_char( "There is no black player.\r\n", ch );
else if ( !str_cmp( board->player1, ch->name ) )
send_to_char( "You are black.\r\n", ch );
else
ch_printf( ch, "%s is black.\r\n", board->player1 );
if ( king_in_checkmate( board, BLACK_KING ) )
send_to_char( "The black king is in checkmate!\r\n", ch );
else if ( king_in_check( board, BLACK_KING ) )
send_to_char( "The black king is in check.\r\n", ch );
if ( !board->player2 )
send_to_char( "There is no white player.\r\n", ch );
else if ( !str_cmp( board->player2, ch->name ) )
send_to_char( "You are white.\r\n", ch );
else
ch_printf( ch, "%s is white.\r\n", board->player2 );
if ( king_in_checkmate( board, WHITE_KING ) )
send_to_char( "The white king is in checkmate!\r\n", ch );
else if ( king_in_check( board, WHITE_KING ) )
send_to_char( "The white king is in check.\r\n", ch );
if ( !board->player2 || !board->player1 )
return;
ch_printf( ch, "%d turns.\r\n", board->turn );
if ( board->turn % 2 == 1 && !str_cmp( board->player1, ch->name ) )
{
ch_printf( ch, "It is %s's turn.\r\n", board->player2 );
return;
}
else if ( board->turn % 2 == 0 && !str_cmp( board->player2, ch->name ) )
{
ch_printf( ch, "It is %s's turn.\r\n", board->player1 );
return;
}
else
{
send_to_char( "It is your turn.\r\n", ch );
return;
}
return;
}
if ( !str_prefix( arg, "board" ) )
{
send_to_char( print_big_board( ch, ch->pcdata->game_board ), ch );
return;
}
if ( !str_prefix( arg, "move" ) )
{
CHAR_DATA *opp;
char opp_name[MAX_INPUT_LENGTH];
char a, b;
int x, y, dx, dy, ret;
if ( !ch->pcdata->game_board->player1 || !ch->pcdata->game_board->player2 )
{
send_to_char( "There is only 1 player.\r\n", ch );
return;
}
if ( ch->pcdata->game_board->turn < 0 )
{
send_to_char( "The game hasn't started yet.\r\n", ch );
return;
}
if ( king_in_checkmate( ch->pcdata->game_board, BLACK_KING ) )
{
send_to_char( "The black king has been checkmated, the game is over.\r\n", ch );
return;
}
if ( king_in_checkmate( ch->pcdata->game_board, WHITE_KING ) )
{
send_to_char( "The white king has been checkmated, the game is over.\r\n", ch );
return;
}
if ( !*argument )
{
send_to_char( "Usage: chess move [piece to move] [where to move]\r\n", ch );
return;
}
if ( ch->pcdata->game_board->turn % 2 == 1 && !str_cmp( ch->pcdata->game_board->player1, ch->name ) )
{
send_to_char( "It is not your turn.\r\n", ch );
return;
}
if ( ch->pcdata->game_board->turn % 2 == 0 && !str_cmp( ch->pcdata->game_board->player2, ch->name ) )
{
send_to_char( "It is not your turn.\r\n", ch );
return;
}
if ( sscanf( argument, "%c%d %c%d", &a, &y, &b, &dy ) != 4 )
{
send_to_char( "Usage: chess move [dest] [source]\r\n", ch );
return;
}
if ( a < 'a' || a > 'h' || b < 'a' || b > 'h' || y < 1 || y > 8 || dy < 1 || dy > 8 )
{
send_to_char( "Invalid move, use a-h, 1-8.\r\n", ch );
return;
}
x = a - 'a';
dx = b - 'a';
--y;
--dy;
ret = is_valid_move( ch, ch->pcdata->game_board, x, y, dx, dy );
if ( ret == MOVE_OK || ret == MOVE_TAKEN )
{
GAME_BOARD_DATA *board;
int piece, destpiece;
board = ch->pcdata->game_board;
piece = board->board[x][y];
destpiece = board->board[dx][dy];
board->board[dx][dy] = piece;
board->board[x][y] = NO_PIECE;
if ( king_in_check( board, IS_WHITE( board->board[dx][dy] ) ? WHITE_KING : BLACK_KING ) && ( board->board[dx][dy] != WHITE_KING && board->board[dx][dy] != BLACK_KING ) )
{
board->board[dx][dy] = destpiece;
board->board[x][y] = piece;
ret = MOVE_INCHECK;
}
else
{
++board->turn;
#ifdef IMC
if ( ch->pcdata->game_board->type == TYPE_IMC )
{
snprintf( arg, LGST, "move %d%d %d%d", x, y, dx, dy );
imc_send_chess( ch->pcdata->game_board->player1, ch->pcdata->game_board->player2, arg );
}
#endif
}
}
if ( !str_cmp( ch->name, ch->pcdata->game_board->player1 ) )
{
opp = get_char_world( ch, ch->pcdata->game_board->player2 );
if ( !opp )
mudstrlcpy( opp_name, ch->pcdata->game_board->player2, MAX_INPUT_LENGTH );
}
else
{
opp = get_char_world( ch, ch->pcdata->game_board->player1 );
if ( !opp )
mudstrlcpy( opp_name, ch->pcdata->game_board->player1, MAX_INPUT_LENGTH );
}
#ifdef IMC
# define SEND_TO_OPP(arg,opp) \
if( opp ) \
{ \
if( ch->pcdata->game_board->type == TYPE_LOCAL ) \
ch_printf( (opp), "%s\r\n", (arg) ); \
} \
else \
{ \
if( ch->pcdata->game_board->type == TYPE_IMC ) \
imc_send_tell( ch->name, opp_name, (arg), 1 ); \
}
#else
# define SEND_TO_OPP(arg,opp) \
if( opp ) \
{ \
if( ch->pcdata->game_board->type == TYPE_LOCAL ) \
ch_printf( (opp), "%s\r\n", (arg) ); \
}
#endif
switch ( ret )
{
case MOVE_OK:
send_to_char( "Ok.\r\n", ch );
snprintf( arg, MAX_INPUT_LENGTH, "%s has moved.\r\n", ch->name );
SEND_TO_OPP( arg, opp );
break;
case MOVE_INVALID:
send_to_char( "Invalid move.\r\n", ch );
break;
case MOVE_BLOCKED:
send_to_char( "You are blocked in that direction.\r\n", ch );
break;
case MOVE_TAKEN:
send_to_char( "You take the enemy's piece.\r\n", ch );
snprintf( arg, MAX_INPUT_LENGTH, "%s has taken one of your pieces!", ch->name );
SEND_TO_OPP( arg, opp );
break;
case MOVE_CHECKMATE:
send_to_char( "That move would result in a checkmate.\r\n", ch );
snprintf( arg, MAX_INPUT_LENGTH, "%s has attempted a move that would result in checkmate.", ch->name );
SEND_TO_OPP( arg, opp );
break;
case MOVE_OFFBOARD:
send_to_char( "That move would be off the board.\r\n", ch );
break;
case MOVE_SAMECOLOR:
send_to_char( "Your own piece blocks the way.\r\n", ch );
break;
case MOVE_CHECK:
send_to_char( "That move would result in a check.\r\n", ch );
snprintf( arg, MAX_INPUT_LENGTH, "%s has made a move that would result in a check.", ch->name );
SEND_TO_OPP( arg, opp );
break;
case MOVE_WRONGCOLOR:
send_to_char( "That is not your piece.\r\n", ch );
break;
case MOVE_INCHECK:
send_to_char( "You are in check, you must save your king.\r\n", ch );
break;
default:
bug( "%s: Unknown return value", __FUNCTION__ );
break;
}
#undef SEND_TO_OPP
return;
}
send_to_char( "Usage: chess <begin|cease|status|board|move|join>\r\n", ch );
}
/*
A FEN string is composed of 6 parts separated by " " (space).
1. Piece placement (from white's perspective).
2. Active color. "w" means white moves next, "b" means black.
3. Castling availability. If neither side can castle, this is "-".
4. En passant target square in algebraic notation. If there's no en passant target square, this is "-".
5. Halfmove clock: this is the number of halfmoves since the last pawn advance or capture.
6. Fullmove number: the number of the full move. It starts at 1, and is incremented after black's move.
*/
void
set_fen (Game *g, const char *fen)
{
Board *board = NEW_BOARD;
int i = 0, j, k, square;
char *pch;
char *s = (char *) malloc (sizeof (char) * (strlen (fen) + 1));
strcpy (s, fen);
// Init board
memset (board->placement, '\0', 64);
board->pawns[WHITE] = 0x0;
board->pawns[BLACK] = 0x0;
board->rooks[WHITE] = 0x0;
board->rooks[BLACK] = 0x0;
board->knights[WHITE] = 0x0;
board->knights[BLACK] = 0x0;
board->bishops[WHITE] = 0x0;
board->bishops[BLACK] = 0x0;
board->queens[WHITE] = 0x0;
board->queens[BLACK] = 0x0;
board->king[WHITE] = 0x0;
board->king[BLACK] = 0x0;
pch = strtok (s, " /");
while (pch != NULL)
{
if (i < 8)
{
for (j = 0, k = 0; j < (int) strlen (pch); j++)
{
if (pch[j] - 48 > 8)
{
square = (abs (i - 7) * 8) + k;
switch (pch[j])
{
case 'P':
board->placement[square] = pch[j];
board->pawns[WHITE] ^= 1ULL << square;
break;
case 'p':
board->placement[square] = pch[j];
board->pawns[BLACK] ^= 1ULL << square;
break;
case 'R':
board->placement[square] = pch[j];
board->rooks[WHITE] ^= 1ULL << square;
break;
case 'r':
board->placement[square] = pch[j];
board->rooks[BLACK] ^= 1ULL << square;
break;
case 'N':
board->placement[square] = pch[j];
board->knights[WHITE] ^= 1ULL << square;
break;
case 'n':
board->placement[square] = pch[j];
board->knights[BLACK] ^= 1ULL << square;
break;
case 'B':
board->placement[square] = pch[j];
board->bishops[WHITE] ^= 1ULL << square;
break;
case 'b':
board->placement[square] = pch[j];
board->bishops[BLACK] ^= 1ULL << square;
break;
case 'Q':
board->placement[square] = pch[j];
board->queens[WHITE] ^= 1ULL << square;
break;
case 'q':
board->placement[square] = pch[j];
board->queens[BLACK] ^= 1ULL << square;
break;
case 'K':
board->placement[square] = pch[j];
board->king[WHITE] ^= 1ULL << square;
break;
case 'k':
board->placement[square] = pch[j];
board->king[BLACK] ^= 1ULL << square;
break;
}
k++;
}
else
k += pch[j] - 48;
}
}
else if (i == 8)
{
board->active_color = pch[0] == 'b';
}
else if (i == 9)
{
board->castling = 0x0000;
for (j = 0; j < (int) strlen (pch); j++)
{
switch (pch[j])
{
case 'K':
board->castling |= 0x1000;
break;
case 'Q':
board->castling |= 0x0100;
break;
case 'k':
board->castling |= 0x0010;
break;
case 'q':
board->castling |= 0x0001;
break;
}
}
}
else if (i == 10)
{
board->en_passant = coord_to_square (pch);
}
else if (i == 11)
{
board->halfmove_clock = atoi (pch);
}
else if (i == 12)
{
board->fullmove_number = atoi (pch);
}
i++;
pch = strtok (NULL, " /");
}
set_occupied (board);
g->boards[g->current] = board;
g->moves[g->current] = (char *) malloc (11);
g->coord_moves[g->current] = (char *) malloc (11);
strcpy (g->moves[g->current], "SET BY FEN");
strcpy (g->coord_moves[g->current], "SET BY FEN");
g->current++;
// check result
if (king_in_checkmate (board, board->active_color))
g->result = !board->active_color;
else
if (stalemate (board, board->active_color) || insufficient_material (board))
g->result = DRAW;
free (s);
}
