form2.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace _hlavolam
{
    public partial class Form2 : Form
    {
        public State start;
        public State end;

        public string errormsg;

        public Form2()
        {
            InitializeComponent();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            int mm;
            int nn;
            
            bool generuj = false;
            if (int.TryParse(textBox1.Text, out mm))
            {
                if (int.TryParse(textBox2.Text, out nn))
                {

                    //nove stavy
                    start = new State(mm, nn);
                    end = new State(mm, nn);
                                       
                    //zistime, ci boly zadane pociatocne hodnoty, ak nie, ideme ich generovat
                    if (string.IsNullOrEmpty(textBox3.Text)) generuj = true;
                    //ak hej, spracujeme
                    else {

                        if (!start.parse(textBox3.Text, "Pociatocny"))
                        {
                            return;
                        }
                    }

                    if (!end.parse(textBox4.Text, "Ziadany"))
                    {
                        return;
                    }



                    this.Close();
                }
                
            }
            label5.Text = "Nespravne rozmery!";
            return;
        }

    }
}



stav.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace _hlavolam
{
    public class State
    {
        //rozmery
        public int m;//riadku
        public int n;//stlpce

        //rozmiestnenie prvkov v stave
        public int[][] stav;
        //poloha prazdneho policka
        public int empty_x;
        public int empty_y;
        public bool empty = false;

        public State(int mm, int nn)
        {
            m = mm;
            n = nn;

            stav = new int[mm][];
            for (int i = 0; i < mm; i++)
            {
                stav[i] = new int[nn];
            }
        }

        public bool MakeView(string file)
        {//vytvori html prezentaciu stavu

            string htmlfile = "<html><head></head><body leftmargin=\"0\" topmargin=\"0\"><table width=\"300\" height=\"300\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\">";
            for (int i = 0; i < m; i++)
            {
                htmlfile += "<tr align=\"center\" valign=\"middle\">";

                for (int j = 0; j < n; j++)
                {
                    htmlfile += "<td>" + stav[i][j].ToString() +"</td>";
                }

                htmlfile += "</tr>";
            }


            htmlfile += "</table></body></html>";
            File.WriteAllText(String.Format("{0}/{1}.html", Form1.dirName, file), htmlfile);
            return true;
        }
        

        public bool parse(string text, string stav) {
            //kolko riadkov bolo v pociatocnych hodnotach
            int tmp;
            string [] riadky = text.Split(new char[] {'\n'});
            string[] riadok;

            //zhoduje sa pocet riadkov zadany v rozmeroch s poctom riadkov s poctom riadkov v pociatocnych hodnotach?
            if (riadky.Length!=this.m) {
                //Form2.label5.Text=string.Format("Nespravny pocet riadkov ({0} stav)!",stav);
                Form2.label5.Text = "kokot";
                return false;                        
            }

            //naplnenie pola zaciatocnych hodnot zo zadanych hodnot
            for (int i = 0; i < this.m; i++)
            {

                riadok = riadky[i].Split(new char[] { ' ' });
                if (riadok.Length != this.n)
                {
                    //Form2.label5.Text = string.Format("Nespravny pocet hodnot v riadku ({0} stav)!", stav);
                    return false;
                }

                for (int j = 0; j < this.n; j++)
                {
                    if (int.TryParse(riadok[j], out tmp))
                    {
                        this.stav[i][j] = tmp;
                    }
                    else
                    {
                        if (this.empty)
                        {
                            //Form2.label5.Text = string.Format("Viac prazdnych poli! ({0} stav)!", stav);
                            return false;
                        }

                        if (string.Equals("x", riadok[j]))
                        {
                            this.stav[i][j] = 0;
                            this.empty = true;
                            this.empty_x = i;
                            this.empty_y = j;

                        }
                    }
                }
            }
            
            if (!this.empty)
            {
                 //Form2.label5.Text = string.Format("Nezadali ste polohu prazdneho pola! ({0} stav)!", stav);
                 return false;
            }
            return true;
        }

    }
}