TAC consisted of a preliminary round that ran over the course of a week and involved roughly 80 games for each of the 22 participants. The top 12 finishers were invited to the semi-finals and finals in Boston, MA on July 8th. Since agents and conditions were constantly changing, and since only 13 games were played by each agent in the semi-finals and finals, the competition does not provide a controlled testing environment. In this section, we describe ATTac-2000's success in the tournament, but also present empirical results of controlled tests that demonstrate the effectiveness and robustness of ATTac-2000's adaptive strategy.