unit fmuMain;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids;

type
  TFormMain = class(TForm)
    StringGrid1: TStringGrid;
    procedure StringGrid1SelectCell(Sender: TObject; ACol, ARow: Integer;
      var CanSelect: Boolean);
    procedure FormCreate(Sender: TObject);
  private
    procedure MoveHod;
    function Finish: Boolean;
  public
    { Public declarations }
  end;

var
  FormMain: TFormMain;
  hod: String;

implementation

{$R *.dfm}

procedure TFormMain.MoveHod;
begin
  if hod = 'X' then
    hod := 'O' else
    if hod = 'O' then
      hod := 'X';
end;

procedure TFormMain.StringGrid1SelectCell(Sender: TObject; ACol,
  ARow: Integer; var CanSelect: Boolean);
begin
  if StringGrid1.Cells[ACol, ARow] = '' then
  begin
    StringGrid1.Cells[ACol, ARow] := hod;
    if Finish then
      Application.MessageBox(PChar('Ïîáåäèë '+hod), 'Ïîáåäà íàÕ!!!')
    else
      MoveHod;
  end;

end;

procedure TFormMain.FormCreate(Sender: TObject);
begin
  hod := 'X';
end;

function TFormMain.Finish: Boolean;
var
  i, j, p: Integer;

  function Presence(c, r: Integer): Boolean;
  begin
    if StringGrid1.Cells[c, r] = hod then
      Result := True
    else
      Result := False;
  end;

begin
  Result := false;
  for i := 0 to 2 do
  begin
    p := 0;
    for j := 0 to 2 do
      if Presence(i, j) then
        inc(p);
    if p = 3 then
      Result := true;
    p := 0;
    for j := 0 to 2 do
      if Presence(j, i) then
        inc(p);
    if p = 3 then
      Result := true;
  end;
  if Presence(1, 1) then
  begin
    if Presence(0, 0) and Presence(2, 2) then
      Result := True;
    if Presence(2, 0) and Presence(0, 2) then
      Result := True;
  end;
end;

end.