void TTTTreeNode::init(char cCurrentplayer) { 
    TTTBoard* pBoard; 
    TTTTreeNode* pTTTTreeNode; 

    // change Player
    this->cPlayer = (cCurrentplayer==PLAYER_1)?PLAYER_2:PLAYER_1; 

    // Game over, no more successors
    if (this->board->isFilled()) return; 
    if (this->board->isWon()) return; 

    // Still possible moves
    for (int iy=0; iy<BOARD_Y;++iy) { 
        for (int ix=0; ix<BOARD_X;++ix) { 
            pTTTTreeNode = NULL; 

            // find emtpy field
            if (this->board->getField(ix, iy)==NULL) { 
                
                // crate new Board, idetically to the one stored in this node
                pBoard = new TTTBoard(this->board); 
                
                // player sets stone
                pBoard->setStone(this->cPlayer, ix, iy); 
                
                // create a new Node with the new board
                pTTTTreeNode = new TTTTreeNode(pBoard); 

                // get the new node initialised
                pTTTTreeNode->init(this->cPlayer); 
            } 
            this->attach(((iy*BOARD_Y)+ix), pTTTTreeNode); 
        } 
    } 
} 
 
 
int TTTTreeNode::count() { 
    int count = 1; 
    for (unsigned int i=0; i<this->successors.size();++i) { 
        if (this->successors!=NULL) count = count + this->successors->count(); 
    } 
    return count; 
}