To beat Kaiba...
Kaiba pretty much uses only one strategy: To use cyber-stein to get Blue-Eyes Ultimate dragon on the field. First, when you play kaiba, make sure you win the rock paper scissors game before the duel. He rotates from left to right everytime you turn on and off your game, so you'll know which card he'll choose. Also, make sure you have a change of heart, or anyother card that lets you take over a monster. When you win, select second to go. First of all, he'll probably set a single card in defense mode and a raigeki. If he plays more than 1 spell/traps or if you don't have a change of heart in your hand, turn off the game. Traps and magics will screw up the proccess. The defense pos monster is most likely a Vorse Raider. You'll want to put down a monster, most likely a weak one. Then end your turn. When you do this, he'll activate Raigeki and kill your monster. Then he'll flip his defense pos monster and summon cyber-stein. He'll use it's ability and lose 5000 life-points and summon Blue-Eyes Ultimate Dragon. He'll then attack you with all 3 monsters. You will have 900 lifepoints left. Now, you have to activate your change of heart and take over Blue-Eyes. When you do, attack cyber-stein. Since he only has 3000 lifepoints left, he'll lose. THEN YOU WIN!
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