Correct Move

#include <stdio.h>

#define QUEENMOVE(NEWCELL)  if (!j) NEWCELL = 0; \
                else if (!NEWCELL)  NEWCELL = 4; \
                else if (NEWCELL == 3)  NEWCELL = 5;\
                else if (NEWCELL == 1)  j = 0;
int main() {
    // Correct Move.
    // after reading the statement: WTF!!!

    int k, q, n; // king, queen, new_queen.
    int i, j;
    while(scanf("%d%d%d", &k, &q, &n) != EOF) {
        int k_col = k%8, k_row = k/8;
        int q_col = q%8, q_row = q/8;
        int n_col = n%8, n_row = n/8;

        if (k == q)
            // given state is illegal.
            printf("Illegal state\n");
        else {
            unsigned char board[8][8] = {0};
            board[k_row][k_col] = 1;
            board[q_row][q_col] = 2;

            // places where king can move to:
            if (k_col != 0) board[k_row][k_col-1] = 3;
            if (k_col != 7) board[k_row][k_col+1] = 3;
            if (k_row != 0) board[k_row-1][k_col] = 3;
            if (k_row != 7) board[k_row+1][k_col] = 3;

            // places where queen is allowed move to:
            for (i = q_col+1, j = 1; i <= 7; i++) QUEENMOVE(board[q_row][i]);
            for (i = q_col-1, j = 1; i >= 0; i--) QUEENMOVE(board[q_row][i]);
            for (i = q_row+1, j = 1; i <= 7; i++) QUEENMOVE(board[i][q_col]);
            for (i = q_row-1, j = 1; i >= 0; i--) QUEENMOVE(board[i][q_col]);

            if (board[n_row][n_col] == 0 || board[n_row][n_col] == 1 || board[n_row][n_col] == 2  || board[n_row][n_col] == 3)
                printf("Illegal move\n");
            else if (board[n_row][n_col] == 5)
                // the move is legal, but not allowed (Graph 2).
                printf("Move not allowed\n");
            else {
                int counter = 0;
                if (k_col != 0 && !(k_col-1 == n_col || k_row == n_row)) counter++;
                if (k_col != 7 && !(k_col+1 == n_col || k_row == n_row)) counter++;
                if (k_row != 0 && !(k_row-1 == n_row || k_col == n_col)) counter++;
                if (k_row != 7 && !(k_row+1 == n_row || k_col == n_col)) counter++;
                if (counter)
                    printf("Continue\n");
                else
                    printf("Stop\n");
            }
            //DEBUG:
            // for (i = 0; i < 8; i++)
            //  for (j = 0; j < 8; j++)
            //      printf("%d%s", board[i][j], j == 7 ? "\n":" ");
        }
    }

    return 0;
}