@Override
public Set<Move> getPossibleMoves(State state) {
ArrayList<Move> temp = new ArrayList<Move>();
Set<Move> result = new HashSet<Move>();
temp = possibleMovePosition(state.getTurn(), state);
if (state.getGameResult() != null) return result;
for (int i = 0; i < temp.size(); i++) {
result.add(temp.get(i));
}
return result;
}
private void addPossiKnightMove(
Color knightcolor, Position position, State temp_result, ArrayList<Move> temp_position) {
int row = position.getRow();
int col = position.getCol();
Position kingPosition = null;
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
if (temp_result.getPiece(i, j) != null) {
if (temp_result.getPiece(i, j).equals(new Piece(knightcolor, KING))) {
kingPosition = new Position(i, j);
break;
}
}
}
}
Position[] possiKnightPosition =
new Position[] {
new Position(row + 2, col + 1), new Position(row + 1, col + 2),
new Position(row - 2, col - 1), new Position(row - 1, col - 2),
new Position(row + 2, col - 1), new Position(row - 2, col + 1),
new Position(row - 1, col + 2), new Position(row + 1, col - 2)
};
for (int l = 0; l < possiKnightPosition.length; l++) {
int i = possiKnightPosition[l].getRow();
int j = possiKnightPosition[l].getCol();
if ((i < 0) || (i > 7) || (j < 0) || (j > 7)) {
continue;
} else {
if ((temp_result.getPiece(possiKnightPosition[l]) == null)
|| ((temp_result.getPiece(possiKnightPosition[l]) != null)
&& (temp_result
.getPiece(possiKnightPosition[l])
.getColor()
.equals(knightcolor.getOpposite())))) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(possiKnightPosition[l], temp_result.getPiece(position));
if (!isUnderCheck(knightcolor, temp, kingPosition)) {
temp_position.add(new Move(position, possiKnightPosition[l], null));
}
}
}
}
}
private ArrayList<Move> possibleMovePosition(Color opposite, State temp_result) {
ArrayList<Move> temp_position = new ArrayList<Move>();
// for each square find piece
for (int i = 0; i <= 7; i++) {
for (int j = 0; j <= 7; j++) {
Piece piece_check = temp_result.getPiece(new Position(i, j));
if (piece_check != null) {
if (piece_check.getColor().equals(opposite)) {
PieceKind pk = piece_check.getKind();
if (pk.equals(PAWN)) {
addPossiPawnMove(opposite, new Position(i, j), temp_result, temp_position);
}
if (pk.equals(KNIGHT)) {
addPossiKnightMove(opposite, new Position(i, j), temp_result, temp_position);
}
if (pk.equals(QUEEN)) {
addPossiQueenMove(opposite, new Position(i, j), temp_result, temp_position);
}
if (pk.equals(ROOK)) {
addPossiRookMove(opposite, new Position(i, j), temp_result, temp_position);
}
if (pk.equals(BISHOP)) {
addPossiBishopMove(opposite, new Position(i, j), temp_result, temp_position);
}
if (pk.equals(KING)) {
addPossiKingMove(opposite, new Position(i, j), temp_result, temp_position);
}
}
}
}
}
return temp_position;
}
@Override
public Set<Position> getPossibleStartPositions(State state) {
Color color = state.getTurn();
Set<Position> result = new HashSet<Position>();
if (state.getGameResult() != null) return result;
for (int i = 0; i <= 7; i++) {
for (int j = 0; j <= 7; j++) {
Piece piece = state.getPiece(i, j);
if ((piece != null) && (piece.getColor().equals(color))) {
PieceKind pk = piece.getKind();
if (pk.equals(PAWN)) {
ArrayList<Move> temp = new ArrayList<Move>();
addPossiPawnMove(color, new Position(i, j), state, temp);
if (temp.size() > 0) result.add(new Position(i, j));
}
if (pk.equals(KNIGHT)) {
ArrayList<Move> temp = new ArrayList<Move>();
addPossiKnightMove(color, new Position(i, j), state, temp);
if (temp.size() > 0) result.add(new Position(i, j));
}
if (pk.equals(QUEEN)) {
ArrayList<Move> temp = new ArrayList<Move>();
addPossiQueenMove(color, new Position(i, j), state, temp);
if (temp.size() > 0) result.add(new Position(i, j));
}
if (pk.equals(ROOK)) {
ArrayList<Move> temp = new ArrayList<Move>();
addPossiRookMove(color, new Position(i, j), state, temp);
if (temp.size() > 0) result.add(new Position(i, j));
}
if (pk.equals(BISHOP)) {
ArrayList<Move> temp = new ArrayList<Move>();
addPossiBishopMove(color, new Position(i, j), state, temp);
if (temp.size() > 0) result.add(new Position(i, j));
}
if (pk.equals(KING)) {
ArrayList<Move> temp = new ArrayList<Move>();
addPossiKingMove(color, new Position(i, j), state, temp);
if (temp.size() > 0) result.add(new Position(i, j));
}
}
}
}
return result;
}
@Override
public Set<Move> getPossibleMovesFromPosition(State state, Position start) {
ArrayList<Move> temp = new ArrayList<Move>();
Set<Move> result = new HashSet<Move>();
if (state.getGameResult() != null) return result;
Piece piece = state.getPiece(start);
if (piece != null) {
PieceKind piecekind = piece.getKind();
Color color = piece.getColor();
switch (piecekind) {
case PAWN:
addPossiPawnMove(color, start, state, temp);
break;
case KNIGHT:
addPossiKnightMove(color, start, state, temp);
break;
case QUEEN:
addPossiQueenMove(color, start, state, temp);
break;
case ROOK:
addPossiRookMove(color, start, state, temp);
break;
case BISHOP:
addPossiBishopMove(color, start, state, temp);
break;
case KING:
addPossiKingMove(color, start, state, temp);
break;
}
for (int i = 0; i < temp.size(); i++) {
result.add(temp.get(i));
}
return result;
} else return result;
}
private boolean isUnderCheck(Color temp_color, State temp_result, Position kingPosition) {
int kingRow = kingPosition.getRow();
int kingCol = kingPosition.getCol();
// check up
if (kingRow < 7) {
for (int i = kingRow + 1; i <= 7; i++) {
Piece temp_piece = temp_result.getPiece(i, kingCol);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if ((temp_piece.getKind() == QUEEN) || (temp_piece.getKind() == ROOK)) {
return true;
} else {
break;
}
} else if (temp_piece.getColor() == temp_color) {
break;
}
}
}
}
// check down
if (kingRow > 0) {
for (int i = kingRow - 1; i >= 0; i--) {
Piece temp_piece = temp_result.getPiece(i, kingCol);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if ((temp_piece.getKind() == QUEEN) || (temp_piece.getKind() == ROOK)) {
return true;
} else {
break;
}
} else if (temp_piece.getColor() == temp_color) {
break;
}
}
}
}
// check left
if (kingCol > 0) {
for (int j = kingCol - 1; j >= 0; j--) {
Piece temp_piece = temp_result.getPiece(kingRow, j);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if ((temp_piece.getKind() == QUEEN) || (temp_piece.getKind() == ROOK)) {
return true;
} else {
break;
}
} else if (temp_piece.getColor() == temp_color) {
break;
}
}
}
}
// check right
if (kingCol < 7) {
for (int j = kingCol + 1; j <= 7; j++) {
Piece temp_piece = temp_result.getPiece(kingRow, j);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if ((temp_piece.getKind() == QUEEN) || (temp_piece.getKind() == ROOK)) {
return true;
} else {
break;
}
} else if (temp_piece.getColor() == temp_color) {
break;
}
}
}
}
// check up-left
if ((kingRow < 7) && (kingCol > 0)) {
int i = kingRow + 1;
int j = kingCol - 1;
while ((i <= 7) && (j >= 0)) {
Piece temp_piece = temp_result.getPiece(i, j);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if ((temp_piece.getKind() == QUEEN) || (temp_piece.getKind() == BISHOP)) {
return true;
} else {
break;
}
} else if (temp_piece.getColor() == temp_color) {
break;
}
}
i++;
j--;
}
}
// check up-right
if ((kingRow < 7) && (kingCol < 7)) {
int i = kingRow + 1;
int j = kingCol + 1;
while ((i <= 7) && (j <= 7)) {
Piece temp_piece = temp_result.getPiece(i, j);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if ((temp_piece.getKind() == QUEEN) || (temp_piece.getKind() == BISHOP)) {
return true;
} else {
break;
}
} else if (temp_piece.getColor() == temp_color) {
break;
}
}
i++;
j++;
}
}
// check down-left
if ((kingRow > 0) && (kingCol > 0)) {
int i = kingRow - 1;
int j = kingCol - 1;
while ((i >= 0) && (j >= 0)) {
Piece temp_piece = temp_result.getPiece(i, j);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if ((temp_piece.getKind() == QUEEN) || (temp_piece.getKind() == BISHOP)) {
return true;
} else {
break;
}
} else if (temp_piece.getColor() == temp_color) {
break;
}
}
i--;
j--;
}
}
// check down-right
if ((kingRow > 0) && (kingCol < 7)) {
int i = kingRow - 1;
int j = kingCol + 1;
while ((i >= 0) && (j <= 7)) {
Piece temp_piece = temp_result.getPiece(i, j);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if ((temp_piece.getKind() == QUEEN) || (temp_piece.getKind() == BISHOP)) {
return true;
} else {
break;
}
} else if (temp_piece.getColor() == temp_color) {
break;
}
}
i--;
j++;
}
}
// check knight position
Position[] possiKnightPosition =
new Position[] {
new Position(kingRow + 2, kingCol + 1),
new Position(kingRow + 1, kingCol + 2),
new Position(kingRow - 2, kingCol - 1),
new Position(kingRow - 1, kingCol - 2),
new Position(kingRow + 2, kingCol - 1),
new Position(kingRow - 2, kingCol + 1),
new Position(kingRow - 1, kingCol + 2),
new Position(kingRow + 1, kingCol - 2)
};
for (int l = 0; l < possiKnightPosition.length; l++) {
int i = possiKnightPosition[l].getRow();
int j = possiKnightPosition[l].getCol();
if ((i < 0) || (i > 7) || (j < 0) || (j > 7)) {
continue;
} else {
Piece temp_piece = temp_result.getPiece(i, j);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if (temp_piece.getKind() == KNIGHT) {
return true;
} else {
continue;
}
} else if (temp_piece.getColor() == temp_color) {
continue;
}
}
}
}
// check pawn position
if (temp_color == WHITE) {
if (kingRow < 7) {
if (kingCol > 0) {
Piece temp_piece1 = temp_result.getPiece(kingRow + 1, kingCol - 1);
if (temp_piece1 != null) {
if (temp_piece1.getColor() == temp_color.getOpposite()) {
if (temp_piece1.getKind() == PAWN) {
return true;
}
}
}
}
if (kingCol < 7) {
Piece temp_piece2 = temp_result.getPiece(kingRow + 1, kingCol + 1);
if (temp_piece2 != null) {
if (temp_piece2.getColor() == temp_color.getOpposite()) {
if (temp_piece2.getKind() == PAWN) {
return true;
}
}
}
}
}
} else if (temp_color == BLACK) {
if (kingRow > 0) {
if (kingCol > 0) {
Piece temp_piece1 = temp_result.getPiece(kingRow - 1, kingCol - 1);
if (temp_piece1 != null) {
if (temp_piece1.getColor() == temp_color.getOpposite()) {
if (temp_piece1.getKind() == PAWN) {
return true;
}
}
}
}
if (kingCol < 7) {
Piece temp_piece2 = temp_result.getPiece(kingRow - 1, kingCol + 1);
if (temp_piece2 != null) {
if (temp_piece2.getColor() == temp_color.getOpposite()) {
if (temp_piece2.getKind() == PAWN) {
return true;
}
}
}
}
}
}
// check king position
Position[] possiKingPosition =
new Position[] {
new Position(kingRow + 1, kingCol),
new Position(kingRow - 1, kingCol),
new Position(kingRow, kingCol + 1),
new Position(kingRow, kingCol - 1),
new Position(kingRow + 1, kingCol + 1),
new Position(kingRow - 1, kingCol - 1),
new Position(kingRow - 1, kingCol + 1),
new Position(kingRow + 1, kingCol - 1)
};
for (int l = 0; l < possiKingPosition.length; l++) {
int i = possiKingPosition[l].getRow();
int j = possiKingPosition[l].getCol();
if ((i < 0) || (i > 7) || (j < 0) || (j > 7)) {
continue;
} else {
Piece temp_piece = temp_result.getPiece(i, j);
if (temp_piece != null) {
if (temp_piece.getColor() == temp_color.getOpposite()) {
if (temp_piece.getKind() == KING) {
return true;
} else {
continue;
}
} else if (temp_piece.getColor() == temp_color) {
continue;
}
}
}
}
return false;
}
private void addPossiPawnMove(
Color pawncolor, Position position, State temp_result, ArrayList<Move> temp_position) {
int row = position.getRow();
int col = position.getCol();
Position kingPosition = null;
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
if (temp_result.getPiece(i, j) != null) {
if (temp_result.getPiece(i, j).equals(new Piece(pawncolor, KING))) {
kingPosition = new Position(i, j);
break;
}
}
}
}
if (pawncolor == WHITE) {
if (row < 7) {
if (row == 1) {
if ((temp_result.getPiece(row + 2, col) == null)
&& (temp_result.getPiece(row + 1, col) == null)) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(row + 2, col, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row + 2, col), null));
}
}
}
if (temp_result.getPiece(row + 1, col) == null) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(row + 1, col, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
if ((row + 1) == 7) {
temp_position.add(new Move(position, new Position(row + 1, col), QUEEN));
temp_position.add(new Move(position, new Position(row + 1, col), BISHOP));
temp_position.add(new Move(position, new Position(row + 1, col), KNIGHT));
temp_position.add(new Move(position, new Position(row + 1, col), ROOK));
} else temp_position.add(new Move(position, new Position(row + 1, col), null));
}
}
if ((col < 7) && (temp_result.getPiece(row + 1, col + 1) != null)) {
if (temp_result.getPiece(row + 1, col + 1).getColor().equals(pawncolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(row + 1, col + 1, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
if ((row + 1) == 7) {
temp_position.add(new Move(position, new Position(row + 1, col + 1), QUEEN));
temp_position.add(new Move(position, new Position(row + 1, col + 1), BISHOP));
temp_position.add(new Move(position, new Position(row + 1, col + 1), KNIGHT));
temp_position.add(new Move(position, new Position(row + 1, col + 1), ROOK));
} else temp_position.add(new Move(position, new Position(row + 1, col + 1), null));
}
}
} else if ((col < 7) && (temp_result.getPiece(row + 1, col + 1) == null)) {
if ((temp_result.getEnpassantPosition() != null)
&& (temp_result.getEnpassantPosition().equals(new Position(row, col + 1)))) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(temp_result.getEnpassantPosition(), null);
temp.setPiece(row + 1, col + 1, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row + 1, col + 1), null));
}
}
}
if ((col > 0) && (temp_result.getPiece(row + 1, col - 1) != null)) {
if (temp_result.getPiece(row + 1, col - 1).getColor().equals(pawncolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(row + 1, col - 1, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
if ((row + 1) == 7) {
temp_position.add(new Move(position, new Position(row + 1, col - 1), QUEEN));
temp_position.add(new Move(position, new Position(row + 1, col - 1), BISHOP));
temp_position.add(new Move(position, new Position(row + 1, col - 1), KNIGHT));
temp_position.add(new Move(position, new Position(row + 1, col - 1), ROOK));
} else temp_position.add(new Move(position, new Position(row + 1, col - 1), null));
}
}
} else if ((col > 0) && (temp_result.getPiece(row + 1, col - 1) == null)) {
if ((temp_result.getEnpassantPosition() != null)
&& (temp_result.getEnpassantPosition().equals(new Position(row, col - 1)))) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(temp_result.getEnpassantPosition(), null);
temp.setPiece(row + 1, col - 1, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row + 1, col - 1), null));
}
}
}
}
}
// black
else {
if (row > 0) {
if (row == 6) {
if ((temp_result.getPiece(row - 2, col) == null)
&& (temp_result.getPiece(row - 1, col) == null)) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(row - 2, col, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row - 2, col), null));
}
}
}
if (temp_result.getPiece(row - 1, col) == null) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(row - 1, col, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
if ((row - 1) == 0) {
temp_position.add(new Move(position, new Position(row - 1, col), QUEEN));
temp_position.add(new Move(position, new Position(row - 1, col), BISHOP));
temp_position.add(new Move(position, new Position(row - 1, col), KNIGHT));
temp_position.add(new Move(position, new Position(row - 1, col), ROOK));
} else temp_position.add(new Move(position, new Position(row - 1, col), null));
}
}
if ((col < 7) && (temp_result.getPiece(row - 1, col + 1) != null)) {
if (temp_result.getPiece(row - 1, col + 1).getColor().equals(pawncolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(row - 1, col + 1, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
if ((row - 1) == 0) {
temp_position.add(new Move(position, new Position(row - 1, col + 1), QUEEN));
temp_position.add(new Move(position, new Position(row - 1, col + 1), BISHOP));
temp_position.add(new Move(position, new Position(row - 1, col + 1), KNIGHT));
temp_position.add(new Move(position, new Position(row - 1, col + 1), ROOK));
} else temp_position.add(new Move(position, new Position(row - 1, col + 1), null));
}
}
} else if ((col < 7) && (temp_result.getPiece(row - 1, col + 1) == null)) {
if ((temp_result.getEnpassantPosition() != null)
&& (temp_result.getEnpassantPosition().equals(new Position(row, col + 1)))) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(temp_result.getEnpassantPosition(), null);
temp.setPiece(row - 1, col + 1, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row - 1, col + 1), null));
}
}
}
if ((col > 0) && (temp_result.getPiece(row - 1, col - 1) != null)) {
if (temp_result.getPiece(row - 1, col - 1).getColor().equals(pawncolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(row - 1, col - 1, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
if ((row - 1) == 0) {
temp_position.add(new Move(position, new Position(row - 1, col - 1), QUEEN));
temp_position.add(new Move(position, new Position(row - 1, col - 1), BISHOP));
temp_position.add(new Move(position, new Position(row - 1, col - 1), KNIGHT));
temp_position.add(new Move(position, new Position(row - 1, col - 1), ROOK));
} else temp_position.add(new Move(position, new Position(row - 1, col - 1), null));
}
}
} else if ((col > 0) && (temp_result.getPiece(row - 1, col - 1) == null)) {
if ((temp_result.getEnpassantPosition() != null)
&& (temp_result.getEnpassantPosition().equals(new Position(row, col - 1)))) {
State temp = temp_result.copy();
temp.setPiece(row, col, null);
temp.setPiece(temp_result.getEnpassantPosition(), null);
temp.setPiece(row - 1, col - 1, temp_result.getPiece(position));
if (!isUnderCheck(pawncolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row - 1, col - 1), null));
}
}
}
}
}
}
private void addPossiQueenMove(
Color queencolor, Position position, State temp_result, ArrayList<Move> temp_position) {
int row = position.getRow();
int col = position.getCol();
Position kingPosition = null;
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
if (temp_result.getPiece(i, j) != null) {
if (temp_result.getPiece(i, j).equals(new Piece(queencolor, KING))) {
kingPosition = new Position(i, j);
break;
}
}
}
}
// check up
int i1 = row + 1;
while ((i1 <= 7) && (temp_result.getPiece(i1, col) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i1, col), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i1, col), null));
}
i1++;
}
if (i1 <= 7) {
if (temp_result.getPiece(i1, col).getColor().equals(queencolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i1, col), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i1, col), null));
}
}
}
// check down
int i2 = row - 1;
while ((i2 >= 0) && (temp_result.getPiece(i2, col) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i2, col), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i2, col), null));
}
i2--;
}
if (i2 >= 0) {
if (temp_result.getPiece(i2, col).getColor().equals(queencolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i2, col), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i2, col), null));
}
}
}
// check up-left
int i3 = row + 1;
int j3 = col - 1;
while ((i3 <= 7) && (j3 >= 0) && (temp_result.getPiece(i3, j3) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i3, j3), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i3, j3), null));
}
i3++;
j3--;
}
if ((i3 <= 7) && (j3 >= 0)) {
if (temp_result.getPiece(i3, j3).getColor().equals(queencolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i3, j3), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i3, j3), null));
}
}
}
// check down-left
int i4 = row - 1;
int j4 = col - 1;
while ((i4 >= 0) && (j4 >= 0) && (temp_result.getPiece(i4, j4) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i4, j4), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i4, j4), null));
}
i4--;
j4--;
}
if ((i4 >= 0) && (j4 >= 0)) {
if (temp_result.getPiece(i4, j4).getColor().equals(queencolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i4, j4), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i4, j4), null));
}
}
}
// check left
int j5 = col - 1;
while ((j5 >= 0) && (temp_result.getPiece(row, j5) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(row, j5), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row, j5), null));
}
j5--;
}
if (j5 >= 0) {
if (temp_result.getPiece(row, j5).getColor().equals(queencolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(row, j5), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row, j5), null));
}
}
}
// check right
int j6 = col + 1;
while ((j6 <= 7) && (temp_result.getPiece(row, j6) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(row, j6), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row, j6), null));
}
j6++;
}
if (j6 <= 7) {
if (temp_result.getPiece(row, j6).getColor().equals(queencolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(row, j6), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row, j6), null));
}
}
}
// check up-right
int i7 = row + 1;
int j7 = col + 1;
while ((i7 <= 7) && (j7 <= 7) && (temp_result.getPiece(i7, j7) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i7, j7), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i7, j7), null));
}
i7++;
j7++;
}
if ((i7 <= 7) && (j7 <= 7)) {
if (temp_result.getPiece(i7, j7).getColor().equals(queencolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i7, j7), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i7, j7), null));
}
}
}
// check down-right
int i8 = row - 1;
int j8 = col + 1;
while ((i8 >= 0) && (j8 <= 7) && (temp_result.getPiece(i8, j8) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i8, j8), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i8, j8), null));
}
i8--;
j8++;
}
if ((i8 >= 0) && (j8 <= 7)) {
if (temp_result.getPiece(i8, j8).getColor().equals(queencolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i8, j8), temp_result.getPiece(position));
if (!isUnderCheck(queencolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i8, j8), null));
}
}
}
}
private void addPossiRookMove(
Color rookcolor, Position position, State temp_result, ArrayList<Move> temp_position) {
int row = position.getRow();
int col = position.getCol();
Position kingPosition = null;
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
if (temp_result.getPiece(i, j) != null) {
if (temp_result.getPiece(i, j).equals(new Piece(rookcolor, KING))) {
kingPosition = new Position(i, j);
break;
}
}
}
}
// check up
int i1 = row + 1;
while ((i1 <= 7) && (temp_result.getPiece(i1, col) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i1, col), temp_result.getPiece(position));
if (!isUnderCheck(rookcolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i1, col), null));
}
i1++;
}
if (i1 <= 7) {
if (temp_result.getPiece(i1, col).getColor().equals(rookcolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i1, col), temp_result.getPiece(position));
if (!isUnderCheck(rookcolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i1, col), null));
}
}
}
// check down
int i2 = row - 1;
while ((i2 >= 0) && (temp_result.getPiece(i2, col) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i2, col), temp_result.getPiece(position));
if (!isUnderCheck(rookcolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i2, col), null));
}
i2--;
}
if (i2 >= 0) {
if (temp_result.getPiece(i2, col).getColor().equals(rookcolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(i2, col), temp_result.getPiece(position));
if (!isUnderCheck(rookcolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(i2, col), null));
}
}
}
// check left
int j5 = col - 1;
while ((j5 >= 0) && (temp_result.getPiece(row, j5) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(row, j5), temp_result.getPiece(position));
if (!isUnderCheck(rookcolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row, j5), null));
}
j5--;
}
if (j5 >= 0) {
if (temp_result.getPiece(row, j5).getColor().equals(rookcolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(row, j5), temp_result.getPiece(position));
if (!isUnderCheck(rookcolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row, j5), null));
}
}
}
// check right
int j6 = col + 1;
while ((j6 <= 7) && (temp_result.getPiece(row, j6) == null)) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(row, j6), temp_result.getPiece(position));
if (!isUnderCheck(rookcolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row, j6), null));
}
j6++;
}
if (j6 <= 7) {
if (temp_result.getPiece(row, j6).getColor().equals(rookcolor.getOpposite())) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(new Position(row, j6), temp_result.getPiece(position));
if (!isUnderCheck(rookcolor, temp, kingPosition)) {
temp_position.add(new Move(position, new Position(row, j6), null));
}
}
}
}
private void addPossiKingMove(
Color kingcolor, Position position, State temp_result, ArrayList<Move> temp_position) {
int row = position.getRow();
int col = position.getCol();
Position[] possiKingPosition =
new Position[] {
new Position(row + 1, col), new Position(row - 1, col),
new Position(row, col + 1), new Position(row, col - 1),
new Position(row + 1, col + 1), new Position(row - 1, col - 1),
new Position(row - 1, col + 1), new Position(row + 1, col - 1)
};
for (int l = 0; l < possiKingPosition.length; l++) {
int i = possiKingPosition[l].getRow();
int j = possiKingPosition[l].getCol();
if ((i < 0) || (i > 7) || (j < 0) || (j > 7)) {
continue;
} else {
if ((temp_result.getPiece(possiKingPosition[l]) == null)
|| ((temp_result.getPiece(possiKingPosition[l]) != null)
&& (temp_result
.getPiece(possiKingPosition[l])
.getColor()
.equals(kingcolor.getOpposite())))) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(possiKingPosition[l], temp_result.getPiece(position));
if (!isUnderCheck(kingcolor, temp, possiKingPosition[l])) {
temp_position.add(new Move(position, possiKingPosition[l], null));
}
}
}
}
if ((kingcolor.equals(WHITE)) && (temp_result.isCanCastleKingSide(kingcolor))) {
boolean isOccupied = false;
Position[] positionNeedCheck = new Position[] {new Position(0, 5), new Position(0, 6)};
for (int i = 0; i < positionNeedCheck.length; i++) {
if (temp_result.getPiece(positionNeedCheck[i]) != null) {
isOccupied = true;
break;
}
}
boolean isChecked = false;
if (!isOccupied) {
Position[] positionNeedCheck1 =
new Position[] {new Position(0, 4), new Position(0, 5), new Position(0, 6)};
for (int i = 0; i < positionNeedCheck1.length; i++) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(positionNeedCheck1[i], new Piece(kingcolor, KING));
isChecked = isUnderCheck(kingcolor, temp, positionNeedCheck1[i]);
if (isChecked) {
break;
}
}
}
if ((!isOccupied) && (!isChecked)) {
temp_position.add(new Move(position, new Position(0, 6), null));
}
}
if ((kingcolor.equals(WHITE)) && (temp_result.isCanCastleQueenSide(kingcolor))) {
boolean isOccupied = false;
Position[] positionNeedCheck =
new Position[] {new Position(0, 3), new Position(0, 2), new Position(0, 1)};
for (int i = 0; i < positionNeedCheck.length; i++) {
if (temp_result.getPiece(positionNeedCheck[i]) != null) {
isOccupied = true;
break;
}
}
boolean isChecked = false;
if (!isOccupied) {
Position[] positionNeedCheck1 =
new Position[] {new Position(0, 4), new Position(0, 3), new Position(0, 2)};
for (int i = 0; i < positionNeedCheck1.length; i++) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(positionNeedCheck1[i], new Piece(kingcolor, KING));
isChecked = isUnderCheck(kingcolor, temp, positionNeedCheck1[i]);
if (isChecked) {
break;
}
}
}
if ((!isOccupied) && (!isChecked)) {
temp_position.add(new Move(position, new Position(0, 2), null));
}
}
if ((kingcolor.equals(BLACK)) && (temp_result.isCanCastleKingSide(kingcolor))) {
boolean isOccupied = false;
Position[] positionNeedCheck = new Position[] {new Position(7, 5), new Position(7, 6)};
for (int i = 0; i < positionNeedCheck.length; i++) {
if (temp_result.getPiece(positionNeedCheck[i]) != null) {
isOccupied = true;
break;
}
}
boolean isChecked = false;
if (!isOccupied) {
Position[] positionNeedCheck1 =
new Position[] {new Position(7, 4), new Position(7, 5), new Position(7, 6)};
for (int i = 0; i < positionNeedCheck1.length; i++) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(positionNeedCheck1[i], new Piece(kingcolor, KING));
isChecked = isUnderCheck(kingcolor, temp, positionNeedCheck1[i]);
if (isChecked) {
break;
}
}
}
if ((!isOccupied) && (!isChecked)) {
temp_position.add(new Move(position, new Position(7, 6), null));
}
}
if ((kingcolor.equals(BLACK)) && (temp_result.isCanCastleQueenSide(kingcolor))) {
boolean isOccupied = false;
Position[] positionNeedCheck =
new Position[] {new Position(7, 3), new Position(7, 2), new Position(7, 1)};
for (int i = 0; i < positionNeedCheck.length; i++) {
if (temp_result.getPiece(positionNeedCheck[i]) != null) {
isOccupied = true;
break;
}
}
boolean isChecked = false;
if (!isOccupied) {
Position[] positionNeedCheck1 =
new Position[] {new Position(7, 4), new Position(7, 3), new Position(7, 2)};
for (int i = 0; i < positionNeedCheck1.length; i++) {
State temp = temp_result.copy();
temp.setPiece(position, null);
temp.setPiece(positionNeedCheck1[i], new Piece(kingcolor, KING));
isChecked = isUnderCheck(kingcolor, temp, positionNeedCheck1[i]);
if (isChecked) {
break;
}
}
}
if ((!isOccupied) && (!isChecked)) {
temp_position.add(new Move(position, new Position(7, 2), null));
}
}
}