void displayInfo(int board[4][4], int move_score[4], MoveDirection move)
{
displayBoard(board);
displayScore(move_score);
displayMove(move);
printf("-------------------------\n");
}
Move Board::think()
{
// ===========================================================================
// This is the entry point for search, it is intended to drive iterative deepening
// The search stops if (whatever comes first):
// - there is no legal move (checkmate or stalemate)
// - there is only one legal move (in this case we don't need to search)
// **later** - time is up
// - the search is interrupted by the user, or by winboard
// - the search depth is reached
// ===========================================================================
int score, legalmoves, currentdepth;
Move singlemove;
// ===========================================================================
// Check if the game has ended, or if there is only one legal move,
// because then we don't need to search:
// ===========================================================================
if (isEndOfgame(legalmoves, singlemove)) return NOMOVE;
if (legalmoves == 1)
{
std::cout << "forced move: "; displayMove(singlemove); std::cout << std::endl;
return singlemove;
}
// ===========================================================================
// There is more than legal 1 move, so prepare to search:
// ===========================================================================
lastPVLength = 0;
memset(lastPV, 0 , sizeof(lastPV));
memset(whiteHeuristics, 0, sizeof(whiteHeuristics));
memset(blackHeuristics, 0, sizeof(blackHeuristics));
inodes = 0;
// display console header
displaySearchStats(1, 0, 0);
timer.init();
msStart = timer.getms();
// iterative deepening:
for (currentdepth = 1; currentdepth <= searchDepth; currentdepth++)
{
// clear the buffers:
memset(moveBufLen, 0, sizeof(moveBufLen));
memset(moveBuffer, 0, sizeof(moveBuffer));
memset(triangularLength, 0, sizeof(triangularLength));
memset(triangularArray, 0, sizeof(triangularArray));
followpv = true;
score = alphabetapvs(0, currentdepth, -LARGE_NUMBER, LARGE_NUMBER);
msStop = timer.getms();
displaySearchStats(2, currentdepth, score);
// stop searching if the current depth leads to a forced mate:
if ((score > (CHECKMATESCORE-currentdepth)) || (score < -(CHECKMATESCORE-currentdepth)))
currentdepth = searchDepth;
}
return (lastPV[0]);
}
void commands()
{
// ================================================================
// commands is used to read console input and execute the commands
// It also serves as winboard driver.
// The code is based on H.G. Muller's model WinBoard protocol driver:
// http://www.open-aurec.com/wbforum/viewtopic.php?f=24&t=51739
// =================================================================
int i, j, number;
int fenhalfmoveclock;
int fenfullmovenumber;
char fen[100];
char fencolor[1];
char fencastling[4];
char fenenpassant[2];
char sanMove[12];
char command[80];
char userinput[80];
U64 msStart,msStop, perftcount;
Timer timer;
Move move, dummy;
// =================================================================
// infinite loop:
// =================================================================
while (1)
{
fflush(stdout);
// =================================================================
// think & move
// =================================================================
if (XB_MODE)
{
if (XB_COMPUTER_SIDE == board.nextMove)
{
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : start think" << std::endl;
#endif
move = board.think();
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : exit think" << std::endl;
std::cout << "#<KENNY : move " << SQUARENAME[move.getFrom()] << SQUARENAME[move.getTosq()] << std::endl;
#endif
if (move.moveInt)
{
printf("move "); printf("%s",SQUARENAME[move.getFrom()]); printf("%s",SQUARENAME[move.getTosq()]);
if (move.isPromotion()) printf("%s",PIECECHARS[move.getProm()]);
printf("\n");
makeMove(move);
board.endOfGame++;
board.endOfSearch = board.endOfGame;
}
}
fflush(stdout);
// =================================================================
// ponder
// =================================================================
if (XB_COMPUTER_SIDE != XB_NONE && XB_COMPUTER_SIDE != XB_ANALYZE && XB_PONDER && board.endOfGame)
{
XB_NO_TIME_LIMIT = true;
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : start ponder" << std::endl;
#endif
move = board.think();
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : exit ponder" << std::endl;
#endif
XB_NO_TIME_LIMIT = false;
}
// =================================================================
// analyze
// =================================================================
if (XB_COMPUTER_SIDE == XB_ANALYZE)
{
XB_NO_TIME_LIMIT = true;
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : start analyze" << std::endl;
#endif
move = board.think();
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : exit analyze" << std::endl;
#endif
XB_NO_TIME_LIMIT = false;
}
}
noPonder:
// =================================================================
// display the command prompt
// =================================================================
if (!XB_MODE)
{
if (board.nextMove == WHITE_MOVE) std::cout << "wt> ";
else std::cout << "bl> ";
fflush(stdout);
}
// =================================================================
// read input, but only after attending a pending command received during
// search/ponder/analyze:
// =================================================================
if (!XB_DO_PENDING)
{
#ifdef KENNY_DEBUG_WINBOARD
if (XB_MODE)
std::cout << "#-KENNY : COMPUTER_SIDE=" << (int)XB_COMPUTER_SIDE << " PONDER=" << XB_PONDER << " nextMove=" << (int)board.nextMove << std::endl;
#endif
for (CMD_BUFF_COUNT = 0; (CMD_BUFF[CMD_BUFF_COUNT] = getchar()) != '\n'; CMD_BUFF_COUNT++);
CMD_BUFF[CMD_BUFF_COUNT+1] = '\0';
#ifdef KENNY_DEBUG_WINBOARD
if (XB_MODE) std::cout << "#>KENNY : " << CMD_BUFF << std::endl;
#endif
}
#ifdef KENNY_DEBUG_WINBOARD
else
{
if (XB_MODE) std::cout << "#>KENNY : " << CMD_BUFF << " (from peek)" << std::endl;
}
#endif
XB_DO_PENDING = false;
// =================================================================
// ignore empty lines
// =================================================================
if (!CMD_BUFF_COUNT) continue;
// =================================================================
// extract the first word
// =================================================================
sscanf(CMD_BUFF, "%s", command);
// =================================================================
// help, h or ?: show this help - list of CONSOLE-ONLY COMMANDS
// =================================================================
if ((!XB_MODE) && ((!strcmp(command, "help")) || (!strcmp(command, "h")) || (!strcmp(command, "?"))))
{
std::cout << std::endl << "help:" << std::endl;
std::cout << "black : BLACK to move" << std::endl;
std::cout << "cc : play computer-to-computer " << std::endl;
std::cout << "d : display board " << std::endl;
std::cout << "eval : show static evaluation of this position" << std::endl;
std::cout << "exit : exit program " << std::endl;
std::cout << "game : show game moves " << std::endl;
std::cout << "go : computer next move " << std::endl;
std::cout << "help, h, or ? : show this help " << std::endl;
std::cout << "info : display variables (for testing purposes)" << std::endl;
std::cout << "ini : read the initialization file" << std::endl;
std::cout << "memory n : max memory to use (in MB)" << std::endl;
std::cout << "move e2e4, or h7h8q : enter a move (use this format)" << std::endl;
std::cout << "moves : show all legal moves" << std::endl;
std::cout << "new : start new game" << std::endl;
std::cout << "perft n : calculate raw number of nodes from here, depth n " << std::endl;
#ifdef KENNY_VERBOSE_SEE
std::cout << "qsearch : shows sorted capture movelist" << std::endl;
#endif
std::cout << "quit : exit program " << std::endl;
std::cout << "r : rotate board " << std::endl;
std::cout << "readfen filename n : reads #-th FEN position from filename" << std::endl;
std::cout << "sd n : set the search depth to n" << std::endl;
std::cout << "setup : setup board... " << std::endl;
std::cout << "test filename : starts search on all FEN position in 'filename'" << std::endl;
std::cout << " using current time & search depth parameters" << std::endl;
std::cout << " output is written in test.log" << std::endl;
std::cout << "time s : time per move in seconds" << std::endl;
std::cout << "undo : take back last move" << std::endl;
std::cout << "white : WHITE to move" << std::endl;
std::cout << std::endl;
continue;
}
// =================================================================
// accepted: in reply to the "feature" command
// =================================================================
if (XB_MODE && !strcmp(command, "accepted")) continue;
// =================================================================
// analyze: enter analyze mode
// =================================================================
if (XB_MODE && !strcmp(command, "analyze"))
{
XB_COMPUTER_SIDE = XB_ANALYZE;
continue;
}
// =================================================================
// black: BLACK to move
// =================================================================
if (!XB_MODE && !strcmp(command, "black") && board.nextMove == WHITE_MOVE)
{
board.hashkey ^= KEY.side;
board.endOfSearch = 0;
board.endOfGame = 0;
board.nextMove = BLACK_MOVE;
continue;
}
// =================================================================
// bk: show book moves from this position, if any
// =================================================================
if (XB_MODE && !strcmp(command, "bk")) continue;
// =================================================================
// cc: play computer-to-computer
// =================================================================
if (!XB_MODE && !strcmp(command, "cc"))
{
while (!_kbhit() && !board.isEndOfgame(i, dummy))
{
move = board.think();
if (move.moveInt)
{
makeMove(move);
board.endOfGame++;
board.endOfSearch = board.endOfGame;
board.display();
}
}
continue;
}
// =================================================================
// computer: the opponent is also a computer chess engine
// =================================================================
if (XB_MODE && !strcmp(command, "computer")) continue;
// =================================================================
// cores n: informs the engine on how many CPU cores it is allowed to use maximally
// =================================================================
if (XB_MODE && !strcmp(command, "cores")) continue;
// =================================================================
// d: display board
// =================================================================
if (!XB_MODE && !strcmp(command, "d"))
{
board.display();
continue;
}
// =================================================================
// easy: turn off pondering
// =================================================================
if (XB_MODE && !strcmp(command, "easy"))
{
XB_PONDER = false;
continue;
}
// =================================================================
// egtpath type path: informs the engine in which directory it can find end-game tables
// =================================================================
if (XB_MODE && !strcmp(command, "egtpath")) continue;
// =================================================================
// eval: show static evaluation of this position
// =================================================================
if (!XB_MODE && !strcmp(command, "eval"))
{
number = board.eval();
std::cout << "eval score = " << number << std::endl;
#ifdef KENNY_DEBUG_EVAL
board.mirror();
board.display();
i = board.eval();
std::cout << "eval score = " << i << std::endl;
board.mirror();
if (number != i) std::cout << "evaluation is not symmetrical! " << number << std::endl;
else std::cout << "evaluation is symmetrical" << std::endl;
#endif
continue;
}
// =================================================================
// exit: leave analyze mode / exit program (if not in WB)
// =================================================================
if (!strcmp(command, "exit"))
{
if (XB_MODE)
{
XB_COMPUTER_SIDE = XB_NONE;
continue;
}
else break;
}
// =================================================================
// force: Set the engine to play neither color
// =================================================================
if (XB_MODE && !strcmp(command, "force"))
{
XB_COMPUTER_SIDE = XB_NONE;
continue;
}
// =================================================================
// game: show game moves
// =================================================================
if (!XB_MODE && !strcmp(command, "game"))
{
if (board.endOfGame)
{
// make a temporary copy of board.gameLine[];
number = board.endOfGame;
GameLineRecord *tmp = new GameLineRecord[number];
memcpy(tmp, board.gameLine, number * sizeof(GameLineRecord));
// unmake all moves:
for (i = number-1 ; i >= 0 ; i--)
{
unmakeMove(tmp[i].move);
board.endOfSearch = --board.endOfGame;
}
// redo all moves:
j = board.nextMove;
for (i = 0 ; i < number; i++)
{
// move numbering:
if (!((i+j+2)%2)) std::cout << (i+2*j+2)/2 << ". ";
else if (!i) std::cout << "1. ... ";
// construct the move string
toSan(tmp[i].move, sanMove);
std::cout << sanMove;
// output CRLF, or space:
if (!((i+j+1)%2)) std::cout << std::endl;
else std::cout << " ";
// make the move:
makeMove(tmp[i].move);
board.endOfSearch = ++board.endOfGame;
}
std::cout << std::endl;
// delete the temporary copy:
delete[] tmp;
}
else
{
std::cout << "there are no game moves" << std::endl;
}
continue;
}
// =================================================================
// go: leave force mode and set the engine to play the color that is on move
// =================================================================
if (!strcmp(command, "go"))
{
if (XB_MODE)
{
XB_COMPUTER_SIDE = board.nextMove;
continue;
}
else
{
if (!board.isEndOfgame(i, dummy))
{
move = board.think();
if (move.moveInt)
{
makeMove(move);
board.endOfGame++;
board.endOfSearch = board.endOfGame;
}
board.display();
board.isEndOfgame(i, dummy);
CMD_BUFF_COUNT = '\0';
}
else
{
board.display();
CMD_BUFF_COUNT = '\0';
}
}
continue;
}
// =================================================================
// hard: turn on pondering
// =================================================================
if (XB_MODE && !strcmp(command, "hard"))
{
XB_PONDER = true;
continue;
}
// =================================================================
// hint: respond with "Hint: xxx", where xxx is a suggested move
// =================================================================
if (XB_MODE && !strcmp(command, "hint"))
{
continue;
}
// =================================================================
// ics hostname: the engine is playing on an Internet Chess Server (ICS) with the given hostname
// =================================================================
if (XB_MODE && !strcmp(command, "ics")) { continue; }
// =================================================================
// info: display variables (for testing purposes)
// =================================================================
if (!XB_MODE && !strcmp(command, "info"))
{
info();
continue;
}
// =================================================================
// ini: read the initialization file
// =================================================================
if (!XB_MODE && !strcmp(command, "ini"))
{
readIniFile();
continue;
}
// =================================================================
// level mps base inc: set time controls
// =================================================================
if (XB_MODE && !strcmp(command, "level"))
{
sscanf(CMD_BUFF, "level %d %d %d", &XB_MPS, &XB_MIN, &XB_INC) == 3 ||
sscanf(CMD_BUFF, "level %d %d:%d %d", &XB_MPS, &XB_MIN, &XB_SEC, &XB_INC);
XB_INC *= 1000;
continue;
}
// =================================================================
// memory n: informs the engine on how much memory it is allowed to use maximally, in MB
// =================================================================
if (XB_MODE && !strcmp(command, "memory")) continue;
// =================================================================
// moves: show all legal moves
// =================================================================
if (!XB_MODE && !strcmp(command, "moves"))
{
board.moveBufLen[0] = 0;
board.moveBufLen[1] = movegen(board.moveBufLen[0]);
std::cout << std::endl << "moves from this position:" << std::endl;
number = 0;
for (i = board.moveBufLen[0]; i < board.moveBufLen[1]; i++)
{
makeMove(board.moveBuffer[i]);
if (isOtherKingAttacked())
{
unmakeMove(board.moveBuffer[i]);
}
else
{
unmakeMove(board.moveBuffer[i]);
toSan(board.moveBuffer[i], sanMove);
std::cout << ++number << ". " << sanMove << std::endl;
}
}
continue;
}
// =================================================================
// move: enter a move (use this format: move e2e4, or h7h8q)
// =================================================================
if (!XB_MODE && !strcmp(command, ""))
{
sscanf(CMD_BUFF,"%s",userinput);
// generate the pseudo-legal move list
board.moveBufLen[0] = 0;
board.moveBufLen[1] = movegen(board.moveBufLen[0]);
if (isValidTextMove(userinput, move)) // check to see if the user move is also found in the pseudo-legal move list
{
makeMove(move);
if (isOtherKingAttacked()) // post-move check to see if we are leaving our king in check
{
unmakeMove(move);
std::cout << " invalid move, leaving king in check: " << userinput << std::endl;
}
else
{
board.endOfGame++;
board.endOfSearch = board.endOfGame;
board.display();
}
}
else
{
std::cout << " move is invalid or not recognized: " << userinput << std::endl;
}
continue;
}
// =================================================================
// name <something>: informs the engine of its opponent's name
// =================================================================
if (XB_MODE && !strcmp(command, "name")) continue;
// =================================================================
// new: reset the board to the standard chess starting position
// =================================================================
if (!strcmp(command, "new"))
{
board.init();
if (XB_MODE)
{
XB_COMPUTER_SIDE = BLACK_MOVE;
board.searchDepth = MAX_PLY;
}
continue;
}
// =================================================================
// nopost: turn off thinking/pondering output
// =================================================================
if (XB_MODE && !strcmp(command, "nopost"))
{
XB_POST = false;
continue;
}
// =================================================================
// otim n: set a clock that belongs to the opponent, in centiseconds
// =================================================================
if (XB_MODE && !strcmp(command, "otim"))
{
// do not start pondering after receiving time commands, as a move will follow immediately
sscanf(CMD_BUFF, "otim %d", &XB_OTIM);
XB_OTIM *= 10; // convert to miliseconds;
goto noPonder;
}
// =================================================================
// option name[=value]: setting of an engine-define option
// =================================================================
if (XB_MODE && !strcmp(command, "option")) continue;
// =================================================================
// perft: calculate raw number of nodes from here, depth n
// =================================================================
if (!XB_MODE && !strcmp(command, "perft"))
{
sscanf(CMD_BUFF,"perft %d", &number);
std::cout << " starting perft " << number << "..." << std::endl;
timer.init();
board.moveBufLen[0] = 0;
#ifdef KENNY_DEBUG_PERFT
ICAPT = 0;
IEP = 0;
IPROM = 0;
ICASTLOO = 0;
ICASTLOOO = 0;
ICHECK = 0;
#endif
msStart = timer.getms();
perftcount = perft(0, number);
msStop = timer.getms();
std::cout << "nodes = " << perftcount << ", " << msStop - msStart << " ms, ";
if ((msStop - msStart) > 0)
std::cout << (perftcount/(msStop - msStart)) << " knods/s";
std::cout << std::endl;
CMD_BUFF_COUNT = '\0';
#ifdef KENNY_DEBUG_PERFT
std::cout << "captures = " << ICAPT << std::endl;
std::cout << "en-passant = " << IEP << std::endl;
std::cout << "castlings = " << ICASTLOO + ICASTLOOO << std::endl;
std::cout << "promotions = " << IPROM << std::endl;
std::cout << "checks = " << ICHECK << std::endl;
#endif
continue;
}
// =================================================================
// ping n: reply by sending the string pong n
// =================================================================
if (XB_MODE && !strcmp(command, "ping"))
{
sscanf(CMD_BUFF,"ping %d", &number);
std::cout << "pong " << number << std::endl;
continue;
}
// =================================================================
// post: turn on thinking/pondering output
// =================================================================
if (XB_MODE && !strcmp(command, "post"))
{
XB_POST = true;
continue;
}
// =================================================================
// protover n: protocol version
// =================================================================
if (XB_MODE && !strcmp(command, "protover"))
{
std::cout << "feature ping=1" << std::endl;
std::cout << "feature setboard=1" << std::endl;
std::cout << "feature colors=0" << std::endl;
std::cout << "feature usermove=1" << std::endl;
std::cout << "feature memory=1" << std::endl;
std::cout << "feature debug=1" << std::endl;
std::cout << "feature done=1" << std::endl;
continue;
}
#ifdef KENNY_VERBOSE_SEE
// =================================================================
// qsearch: shows sorted capture movelist
// =================================================================
if (!XB_MODE && !strcmp(command, "qsearch"))
{
board.moveBufLen[0] = 0;
board.moveBufLen[1] = captgen(board.moveBufLen[0]);
std::cout << std::endl << "sorted capturing moves from this position:" << std::endl;
std::cout << std::endl << " score:" << std::endl;
number = 0;
for (i = board.moveBufLen[0]; i < board.moveBufLen[1]; i++)
{
makeMove(board.moveBuffer[i]);
if (isOtherKingAttacked())
{
unmakeMove(board.moveBuffer[i]);
}
else
{
unmakeMove(board.moveBuffer[i]);
std::cout << ++number << ". ";
displayMove(board.moveBuffer[i]);
std::cout << " " << board.moveBuffer[i + OFFSET].moveInt << std::endl;
}
}
continue;
}
#endif
// =================================================================
// quit: exit program
// =================================================================
if (!strcmp(command, "quit")) break;
// =================================================================
// r: rotate board
// =================================================================
if (!XB_MODE && !strcmp(command, "r"))
{
board.viewRotated = !board.viewRotated;
continue;
}
// =================================================================
// random: ignored
// =================================================================
if (XB_MODE && !strcmp(command, "random")) continue;
// =================================================================
// rating: ICS opponent's rating
// =================================================================
if (XB_MODE && !strcmp(command, "rating")) continue;
// =================================================================
// readfen filename n: reads #-th FEN position from filename
// =================================================================
if (!XB_MODE && !strcmp(command, "readfen"))
{
sscanf(CMD_BUFF,"readfen %s %d", userinput, &number);
board.init();
readFen(userinput, number);
board.display();
continue;
}
// =================================================================
// rejected: feature is rejected
// =================================================================
if (XB_MODE && !strcmp(command, "rejected")) continue;
// =================================================================
// remove: undo the last two moves (one for each player) and continue playing the same color.
// =================================================================
if (XB_MODE && !strcmp(command, "remove"))
{
if (board.endOfGame)
{
unmakeMove(board.gameLine[--board.endOfGame].move);
board.endOfSearch = board.endOfGame;
}
if (board.endOfGame)
{
unmakeMove(board.gameLine[--board.endOfGame].move);
board.endOfSearch = board.endOfGame;
}
continue;
}
// =================================================================
// result string {comment}: end the each game, e.g.: result 1-0 {White mates}
// =================================================================
if (XB_MODE && !strcmp(command, "result"))
{
XB_COMPUTER_SIDE = XB_NONE;
continue;
}
// =================================================================
// sd n: set the search depth to n
// =================================================================
if (!strcmp(command, "sd"))
{
sscanf(CMD_BUFF,"sd %d", &board.searchDepth);
if (board.searchDepth < 1) board.searchDepth = 1;
if (board.searchDepth > MAX_PLY) board.searchDepth = MAX_PLY;
std::cout << "KENNY> search depth " << board.searchDepth << std::endl;
continue;
}
// =================================================================
// setboard fen: set up the board/position
// =================================================================
if (XB_MODE && !strcmp(command, "setboard"))
{
XB_COMPUTER_SIDE = XB_NONE;
sscanf(CMD_BUFF, "setboard %s %s %s %s %d %d", fen, fencolor, fencastling, fenenpassant, &fenhalfmoveclock, &fenfullmovenumber);
setupFen(fen, fencolor, fencastling, fenenpassant, fenhalfmoveclock, fenfullmovenumber);
continue;
}
// =================================================================
// setup: setup board...
// =================================================================
if (!XB_MODE && !strcmp(command, "setup"))
{
setup();
continue;
}
// =================================================================
// stopfrac (0-100%): undocumented command to interactively change this
// parameter (e.g. for running testsuites), default value is 60
// Don't start a new iteration if STOPFRAC fraction of the max search time
// has passed
// =================================================================
if (!XB_MODE && !strcmp(command, "stopfrac"))
{
number = (int)(STOPFRAC * 100);
sscanf(CMD_BUFF, "stopfrac %d", &number);
if (number < 1) number = 1;
if (number > 100) number = 100;
STOPFRAC = (float)(number/100.0);
std::cout << "KENNY> stopfrac " << 100*STOPFRAC << std::endl;
continue;
}
// =================================================================
// st time: set time controls
// =================================================================
if (XB_MODE && !strcmp(command, "st"))
{
sscanf(CMD_BUFF, "st %d", &board.maxTime);
board.maxTime *= board.maxTime; // convert to ms
continue;
}
// =================================================================
// test filename: starts search on all FEN position in 'filename
// =================================================================
if (!XB_MODE && !strcmp(command, "test"))
{
sscanf(CMD_BUFF,"test %s", userinput);
board.init();
test(userinput);
continue;
}
// =================================================================
// time: set a clock that belongs to the engine
// =================================================================
if (!strcmp(command, "time"))
{
number = (int)board.maxTime / 1000;
sscanf(CMD_BUFF,"time %d", &number);
if (number < 1) number = 1;
if (!XB_MODE) std::cout << "KENNY> search time " << number << " seconds" << std::endl;
if (XB_MODE)
{
XB_CTIM = number * 10;
board.maxTime = number * 10; // conversion to ms
}
else
{
board.maxTime = number * 1000; // conversion to ms
}
goto noPonder;
}
// =================================================================
// undo: take back last move
// =================================================================
if (!strcmp(command, "undo"))
{
if (board.endOfGame)
{
unmakeMove(board.gameLine[--board.endOfGame].move);
board.endOfSearch = board.endOfGame;
if (!XB_MODE) board.display();
}
else if (!XB_MODE) std::cout << "already at start of game" << std::endl;
continue;
}
// =================================================================
// usermove move: do a move
// =================================================================
if (XB_MODE && !strcmp(command, "usermove"))
{
sscanf(CMD_BUFF,"usermove %s",userinput);
// generate the pseudo-legal move list
board.moveBufLen[0] = 0;
board.moveBufLen[1] = movegen(board.moveBufLen[0]);
if (isValidTextMove(userinput, move)) // check to see if the user move is also found in the pseudo-legal move list
{
makeMove(move);
if (isOtherKingAttacked()) // post-move check to see if we are leaving our king in check
{
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : usermove illegal" << std::endl;
#endif
unmakeMove(move);
}
else
{
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : usermove " << userinput << " made" << std::endl;
#endif
board.endOfGame++;
board.endOfSearch = board.endOfGame;
}
}
else
{
#ifdef KENNY_DEBUG_WINBOARD
std::cout << "#-KENNY : usermove illegal" << std::endl;
#endif
}
continue;
}
// =================================================================
// variant: the game is not standard chess
// =================================================================
if(XB_MODE && !strcmp(command, "variant")) continue;
// =================================================================
// white: WHITE to move
// =================================================================
if (!XB_MODE && !strcmp(command, "white") && board.nextMove == BLACK_MOVE)
{
board.hashkey ^= KEY.side;
board.endOfSearch = 0;
board.endOfGame = 0;
board.nextMove = WHITE_MOVE;
continue;
}
// =================================================================
// xboard: put the engine into "xboard mode", stop all unsolicited output
// =================================================================
if (!XB_MODE && !strcmp(command, "xboard"))
{
#ifdef KENNY_DEBUG_WINBOARD
if (XB_MODE) std::cout << "#>KENNY : xboard" << std::endl;
#endif
std::cout << std::endl;
XB_COMPUTER_SIDE = XB_NONE;
XB_MODE = true;
XB_POST = false;
board.init();
continue;
}
// =================================================================
// unknown command:
// =================================================================
printf("Error: unknown command: %s\n", command);
#ifdef KENNY_DEBUG_WINBOARD
if (XB_MODE) std::cout << "#<KENNY : Error: unknown command: " << command << std::endl;
#endif
}
}
