How hard is USAChO?

<p>How hard is it to score high enough to be a semifinalist? I'm normally pretty good at chem. I can usually get 90% raw score on my ap chem tests (they're about as hard as the actual exam) without studying too much (and I get 100 after the curve). Am I on good grounds to get a high enough score on the olympiad test without too much studying or should I crack open my textbook?</p>

<p>If a football team is 10-0, can they skip practice before the next game? You may want to obtain review materials relevant to the olympiad to get your mental processes into an “olympian” mode.</p>