// Puts the current player's piece in a vertical column, where the piece falls
// to the lowest empty position available in the board. Placing a piece in a
// "bad" column (such as a column that doesn't exist or is already full of
// pieces) results in the player just losing their turn
void ConnectX::placePiece(int column)
{
for(int i=height-1; i>=0; i--)
{
if( at(column,i) == EMPTY && inBounds(column,i) )
{
board[i][column] = turn;
break;
}
}
toggleTurn();
}
STATUS CChessGame :: playMoveOnBoard(BOARD_POSITION init, BOARD_POSITION dest,
CHESSPIECE_GENERAL newCp,
MOVE_CLAIM mClaim = CLAIM_NONE)
{
STATUS status;
CHECK_STATUS cStatus;
MOVELIST *mList, *tempList;
CZobrist zob;
UINT64 currentHash;
UINT8 count = 1, currentSeqNum;
status = validateMove(init, dest, MVT_GENERAL);
if((status & MOVE_PAWN_PROMOTED) &&
newCp == CHESSPIECE_TYPE(INVALID_CHESSPIECE))
{
//pawn promotion should provide new piece also
if(playerType[gState.turn] != PT_COMPUTER)
{
newCp = getNewPieceFromUser();
}
else
{
status = MOVE_ILLEGAL;
}
}
if(status & MOVE_SUCCESS)
{
(void)makeMove(init, dest, newCp, status);
mList = (MOVELIST *)moveList.getTail();
if(mList != NULL)
{
//status must have got updated after makemove...
status = mList->status;
cStatus = scan4Check(init, dest, CHECK);
if(isEndGame())
{
if(cStatus == CHECK)
{
status |= MOVE_CHECKMATE;
//printf("Checkmate\n");
}
else
{
status |= MOVE_STALEMATE;
//printf("Stalemate\n");
}
}
else if(cStatus == CHECK)
{
status |= MOVE_CHECK;
//printf("Itz a check!!\n");
}
/* Form the SAN notation for the MOVE */
mList->status = status; //This is needed for SAN
(void)updateCANString(mList);
(void)updateSANString(mList, TRUE);
(void)updateFENString(mList->FEN);
//check if 50 move repetition happened
if(gState.draw50HalfMoveCount >= 50)
{
mList->status |= MOVE_DRAW_50MOVE_ACTIVE;
}
//check for insufficient material draw
tempList = (MOVELIST *)moveList.getPrev((DLL_NODE *)mList);
if((tempList != NULL && tempList->status & MOVE_DRAW_INSUFFICIENT_PIECES_ACTIVE) ||
insufficientMatingMaterial(getLastFENString()) == TRUE)
{
mList->status |= MOVE_DRAW_INSUFFICIENT_PIECES_ACTIVE;
}
// Update zobrist Hash
zob.updateBoardPosition(getLastFENString());
zob.calculateZobristHash();
mList->zobristHash = zob.getZobristHash();
currentHash = mList->zobristHash;
currentSeqNum = gState.seqNum;
//check if 3 move repetition happened
for(tempList = (MOVELIST *)moveList.getPrev((DLL_NODE *)mList);
tempList != NULL;
tempList = (MOVELIST *)moveList.getPrev((DLL_NODE *)tempList))
{
if(tempList->seqNum != currentSeqNum)
{
break;
}
if(tempList->zobristHash == currentHash)
{
//add more detailed check using FEN string if required
count++;
}
if(count == 3)
{
break;
}
}
if(count == 3)
{
mList->status |= MOVE_DRAW_3MOVE_ACTIVE;
}
status = mList->status;
}
toggleTurn();
}
return status;
}
