Day 16: Ko, part III

Well, something like a ko was implemented in the program, but still couldn't test it.

First I changed tryToKill from void to integer and return number of killed stones:

public int tryToKill(int color){ Ruleset ruleset=new Ruleset(); int killed=0; //return the number of killed stones ArrayList<integer> group=new ArrayList<>(); boolean isDead; for(int i=0;i<this.getMainBoard().size();i++){ if(this.getMove(i)==color){ group=ruleset.getGroup(i, this); isDead=ruleset.TryKillingGroups(group, this); if(isDead==true){ //if dead KILL! killed=group.size(); //first add dead stones to the "bowl" if(color==1){ //Add black stones to the bowl this.blackDeadStones=this.blackDeadStones+killed; }else{ // this.whiteDeadStones=this.whiteDeadStones+killed; } System.out.println("Killed"); for(int j=0;j<group.size();j++){ this.setMove(group.get(j), 0); } } } } return killed; }

So now, main loop will take the result when killing stones.

And now I have to pass as parameters the last board, number of killed stones in the last turn and the color to evaluate. So I changed the getPossibleMoves method:

public ArrayList<integer> getPossibleMoves(Board mainBoard,Board lastBoard, int captured,int color){ //This method returns all the possible places to put a stone ArrayList<integer> posibleMoves=new ArrayList<>(); boolean possibleMove=false; boolean koMove; for(int i=0;i<mainBoard.getMainBoard().size();i++){ //If the position have a 0, then add i to the array. if(mainBoard.getMainBoard().get(i)==0){ if(captured==1){ //KO posibility koMove=this.isKo(mainBoard, lastBoard, mainBoard.getMainBoard().get(i), color); if(koMove==false){//if false this is not ko. possibleMove=true; } }else{ possibleMove=true; } if(possibleMove==true){ posibleMoves.add(i); } //boolean must go back to false to see if next move is possible possibleMove=false; } } return posibleMoves; }

Now I know that the engine should send more parameters to the getPossibleMoves method of the ruleset:
public int play(Board board,Board lastBoard, int captured,int color){ int move; ArrayList<integer> posibleMoves; ArrayList<integer> group; Ruleset ruleset=new Ruleset(); //group=this.getGroups(board,1); this.getGroups(board, 1); this.getGroups(board, 2); posibleMoves=ruleset.getPossibleMoves(board,lastBoard,captured,color); move=makeMove(posibleMoves); return move; }

So, last thing to show is the "isKo" method, that returns true if the move is a ko and false if it is not: public boolean isKo(Board board, Board lastBoard,int move,int color){ //This method will tell if there is a board repetition //to verify ko. //first play te move boolean isEqual=true; board.setMove(move, color); if(color==1){ board.tryToKill(2); }else{ board.tryToKill(1); } //now compare for(int i=0;i<board.getMainBoard().size();i++){ if(board.getMove(i)!=lastBoard.getMove(color)){ isEqual=false; break; } } //If isEqual is true, there is a ko. return isEqual; }

Next: I know I should start with suicide rule, but... I want to see it on a better graphic interface so I will work on GTP and loging.