Fuuuuuuuuuuuuck

public class Main {

    public static void main(String[] args) {
     int[][] chessTable = new int[20][20];

     boolean chetnRow = false;
        int accCol =3;
     for (int i =0; i < 20; i++) {
         int ONE_NUM;
         int TWO_NUM;
         if (accCol !=0){
             accCol--;
             ONE_NUM = 1;
             TWO_NUM = 0;

         }
         else {
             accCol =3;
             chetnRow =!chetnRow;
             ONE_NUM = 0;
             TWO_NUM = 1;
             //System.out.println("nechetn chisl");
         }
         int acc = 4;
         //boolean chetnRow = false;
         for (int j = 0; j < 20; j++){
             if (acc != 0) {
                 chessTable[i][j] = chetnRow ? ONE_NUM : TWO_NUM;
                 acc--;
             }
             else {
                 acc = 3;
                 chetnRow = !chetnRow;
                 chessTable[i][j] = chetnRow ? ONE_NUM : TWO_NUM;
             }

            System.out.print(" " + chessTable[i][j]);

         }
         System.out.println("");

         }
         //System.out.print(chessTable[i][j]);
     }