Short answers, pulled from the story.
Wilt Chamberlain scored 100 points on the 2nd of March 1962 during a game at Hershey Sports Arena. The event took place on a cold and rainy Friday night with only 4,124 spectators present.
The game occurred at Hershey Sports Arena in Hershey, Pennsylvania, which is located 70 miles from Philadelphia. This old gymnasium was originally built for ice hockey and had a capacity of over 8,000 seats despite being drafty.
Wilt Chamberlain reached 69 points by the end of the third quarter while leading the Warriors to a 125, 106 lead. He needed 25 more points within the last ten minutes to reach his century mark.
The New York Knicks began fouling any Warrior except Wilt Chamberlain once six minutes remained to limit his scoring opportunities. They moved the ball slowly and used as much of the shot clock as possible to reduce the number of times he could touch the ball.
Only audio recordings of the fourth quarter survive because no video footage has been recovered since the event on the 2nd of March 1962. A copy of the radio broadcast was uncovered in 1988 when Jim Trelease found a reel-to-reel tape recorded as a college student at the University of Massachusetts.