The Boston Celtics had two straight chances to eliminate the Philadelphia 76ers from the NBA Playoffs and fumbled both opportunities due to a glaring strategic flaw in their game plan. On Thursday night, not only did Philly's fans get fired up for a big game from their stars, but Boston once again seemed to create their own demise. The final stats in Philadelphia's 106-93 victory didn't point to any major advantage that the 76ers had. They shot 44 percent compared to 42 percent for the Celtics,