Look in the bottom of the following table for some non-cheat codes. If you cheat, he/she will never play with you again, but otherways you can have a rematch and beat him/her for real and feel proud. If you're losing, surrender, don't annoy your opponent with cheats.
Play for playing, not winning because even if you lost, you have gained experience and you will not make the same mistake again. Trouble and Challenge is what makes the game interesting.