private int checkHorizontal(final int x, final int y, final GameStateModule state) {
int count1 = 0;
int count2 = 0;
// check for cases of 2 matched coins and no blocking coin in every horizontal 4 that x,y could
// be a part
for (int i = x - 3; i <= x; i++) {
count1 = 0;
count2 = 0;
if (isLegal(i, y) && isLegal(i + 3, y)) {
for (int d = 0; d < 4; d++) {
int id = state.getAt(i + d, y);
switch (id) {
case 1:
count1++;
break;
case 2:
count2++;
break;
}
}
if (count1 > 1 && count2 == 0) {
return 1;
}
if (count1 == 0 && count2 > 1) {
return 2;
}
}
}
return 0;
}
private void findThreats(
final int player, final int x, final int y, final GameStateModule state) {
for (int i = x - 3; i <= x; i++) {
int p = -1;
int c = 0;
int blank = -1;
// BEGIN horizontal
if (isLegal(i, y) && isLegal(i + 3, y)) {
for (int d = 0; d < 4; d++) {
p = state.getAt(i + d, y);
if (p == player) {
c++;
} else if (p == 0) {
blank = d;
}
}
if (c == 3 && blank != -1) {
if (player == myID) {
myThreats[i + blank][y] = myID;
} else {
eThreats[i + blank][y] = eID;
}
}
}
// END horizontal
// BEGIN agu
for (int j = y - 3; j <= y; j++) {
if (isLegal(i, j) && isLegal(i + 3, j + 3)) {
p = -1;
c = 0;
blank = -1;
for (int d = 0; d < 4; d++) {
p = state.getAt(i + d, j + d);
if (p == player) {
c++;
} else if (p == 0) {
blank = d;
}
}
if (c == 3 && blank != -1) {
if (player == myID) {
myThreats[i + blank][j + blank] = myID;
} else {
eThreats[i + blank][j + blank] = eID;
}
}
}
}
// END agu
// BEGIN grave
for (int k = y + 3; k >= y; k--) {
if (isLegal(i, k) && isLegal(i + 3, k - 3)) {
p = -1;
c = 0;
blank = -1;
for (int d = 0; d < 4; d++) {
p = state.getAt(i + d, k - d);
if (p == player) {
c++;
} else if (p == 0) {
blank = d;
}
}
if (c == 3 && blank != -1) {
if (player == myID) {
myThreats[i + blank][k - blank] = myID;
} else {
eThreats[i + blank][k - blank] = eID;
}
}
}
}
// END grave
}
// BEGIN vertical
if (y > 1 && y < 5) {
if (state.getAt(x, y - 1) == player && state.getAt(x, y - 2) == player) {
if (player == myID) {
myThreats[x][y + 1] = myID;
} else {
eThreats[x][y + 1] = eID;
}
}
}
// END vertical
}
private int[] evaluate(final GameStateModule state) {
int h = -1;
moves = new int[7];
for (int i = 0; i < 7; i++) {
h = heights[i];
if (h != 6) {
if (myThreats[i][h] == myID) {
moves[i] = Integer.MAX_VALUE; // if we can win no further calcs are necessary
} else {
if (eThreats[i][h] == eID) {
moves[i] += NOLOSS; // if our opponent can win we have no choice but to block
} else {
if (h != 5 && eThreats[i][h + 1] == eID) {
moves[i] += SUICIDE; // don't place the piece that enables your opponent to win
}
if ((i == 1 || i == 5) && h == 0 && state.getAt(3, 2) == eID) {
int v = (3 - i) / 2;
if (state.getAt(i + v, 1) == eID) {
moves[i] += FLANKER;
}
}
/*for(int a = 1; a < 6-h; a++) {
if(myThreats[i][h+a] == myID) {
moves[i] += a == 1 ? -ROWZUG : ((a+1)%2)*ROWZUG; // don't waste a zug row
break;
}
if(eThreats[i][h+a] == eID) {
moves[i] += a == 1 ? -ROWZUG : ((a+1)%2)*ROWZUG;
break;
}
}
if(h < 5) {
moves[i] -= checkHorizontal(i,h+1, state) == 0 ? 0 : HORIZON*(5-h);
}// */
moves[i] += checkHorizontal(i, h, state) == 0 ? 0 : HORIZON * (6 - h);
moves[i] +=
4
- Math.abs(
i - 3) /*+ (6-h)*/; // this gives a very small bias toward the center bottom
}
}
}
// else {
// moves[i] += ILLEGAL;
// }
}
/*
if(countdown-- > 0) {
//System.out.print(" | " + countdown + " | ");
for(int i = 0; i < 7; i++) {
if(state.canMakeMove(i) && moves[i] != Integer.MAX_VALUE) {
heights[i]++;
state.makeMove(i);
int[] children = evaluate(state);
state.unMakeMove();
heights[i]--;
int min = Integer.MAX_VALUE;
for(int j = 0; j < 7; j++) {
if(children[j] < min) {
min = children[j];
}
}
moves[i] = min;
}
// else if(!state.canMakeMove(i)) {
// moves[i] = -Integer.MAX_VALUE;
// }
}
}*/
for (int i = 0; i < 7; i++) {
if (state.canMakeMove(i)) {
if (alternate) {
if (moves[i] > moves[chosenMove]) {
chosenMove = i;
}
alternate = false;
} else {
if (moves[i] >= moves[chosenMove]) {
chosenMove = i;
}
alternate = true;
}
} else {
moves[i] = Integer.MAX_VALUE;
}
}
return moves;
}