How does Rose's plan for Ender in his first battle with them backfire and lead to a change in the game?
The answer to this question can be found in chapter 8, which is titled "Rat." The chapter begins with Graff and Anderson arguing about whether or not to manipulate the battleroom to present students (like Ender) with unfair situations. Once the text returns to Ender, readers see that he has been transferred to Rat Army. Rose the Nose is in charge, and Ender is assigned to Dink Meeker's platoon. It is clear that Rose does not like Ender, and he wants to hurt Ender's overall standing. In order to do this, Rose orders Ender to follow a suicidal plan of action.
"As soon as that door opens, you jump through, go straight ahead toward the enemy's door."
Suicide. Pointless, meaningless self-destruction. But he had to follow orders now, this was battle, not school.
Ender agrees, but he also positions his body in such a way that the opposing army can't hit vital parts of his suit. The result is that Ender is able to seriously damage the opposing army before his suit is fully locked up. Despite Rose's plan to hurt Ender's score, Ender still manages to stay at the top of leader board.
Ender was still first in the standings, since he had frozen three, disabled two, and damaged seven.
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