Knight Path

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace KnightPath
{
    class KnightPath
    {
        static void Main(string[] args)
        {

            int[] numbers = new int[] { 0, 0, 0, 0, 0, 0, 0, 0 };
            int indexOfNumbers = 0;
            int curentPosition = 0;
            numbers[indexOfNumbers] |=  1;
            bool stop = false;
            while (!stop)
            {
                string commandString = Console.ReadLine();
                if (commandString == "stop")
                {
                    stop = true;
                    continue;
                }
                string[] comands = commandString.Split(' ');

                string firstCommand = comands[0];
                string secondCommand = comands[1];

                if (firstCommand == "left" && secondCommand == "up")
                {
                    if ((curentPosition + 2) > 7 | (indexOfNumbers - 1) < 0) continue;
                    curentPosition +=  2;
                    indexOfNumbers -= 1;
                }
                else if (firstCommand == "left" && secondCommand == "down")
                {
                    if ((curentPosition + 2) > 7 | (indexOfNumbers + 1) > 7) continue;
                    curentPosition += 2;
                    indexOfNumbers += 1;
                }
                else if (firstCommand == "right" && secondCommand == "up")
                {
                    if ((curentPosition - 2) < 0 | (indexOfNumbers - 1) < 0) continue;
                    curentPosition -= 2;
                    indexOfNumbers -= 1;
                }
                else if (firstCommand == "right" && secondCommand == "down")
                {
                    if ((curentPosition - 2) < 0 | (indexOfNumbers + 1) > 7) continue;
                    curentPosition -= 2;
                    indexOfNumbers += 1;
                }
                else if (firstCommand == "up" && secondCommand == "left")
                {
                    if ((curentPosition + 1) > 7 | (indexOfNumbers - 2) < 0) continue;
                    curentPosition += 1;
                    indexOfNumbers -= 2;
                }
                else if (firstCommand == "up" && secondCommand == "right")
                {
                    if ((curentPosition - 1) < 0 | (indexOfNumbers - 2) < 0) continue;
                    curentPosition -= 1;
                    indexOfNumbers -= 2;
                }
                else if (firstCommand == "down" && secondCommand == "left")
                {
                    if ((curentPosition + 1) > 7 | (indexOfNumbers + 2) > 7) continue;
                    curentPosition += 1;
                    indexOfNumbers += 2;
                }
                else if (firstCommand == "down" && secondCommand == "right")
                {
                    if ((curentPosition - 1) < 0 | (indexOfNumbers + 2) > 7) continue;
                    curentPosition -= 1;
                    indexOfNumbers += 2;
                }
                if (((numbers[indexOfNumbers] >> curentPosition) & 1) == 0)
                {
                    numbers[indexOfNumbers] |= (1 << curentPosition);
                }
                else if (((numbers[indexOfNumbers] >> curentPosition) & 1) == 1)
                {
                    numbers[indexOfNumbers] &= (~(1 << curentPosition));
                }
            }
            int counter1 = 0;
            for (int i = 0; i < 8; i++)
            {
                counter1 += numbers[i];
            }
            if (counter1 == 0)
            {
                Console.WriteLine("[Board is empty]");
            }
            else
            {
                for (int i = 0; i < 8; i++)
                {
                    if (numbers[i] > 0)
                    {
                        Console.WriteLine(numbers[i]);
                    }
                }
            }
        }
    }
}