NM Dana Mackenzie started playing tournament chess during the "Fischer boom" of 1971-1972 and never quit. Champion of North Carolina in 1985, 1987, and became master in 1988. He has a 1-0 career record against world chess champions. (The champion in question was the world computer champion, Belle, which Dana defeated in the 1983 U.S. Amateur Team Championship.) Mackenzie now lives in Santa Cruz, CA and runs a chess club for kids at the local library.

26: Nimzo-Indian: Leningrad Variation Run Time: 00:42:45

27: Queen's Pawn Game Run Time: 00:38:44

28: Queen's Gambit Declined: Semi-Slav, Bogolyubov Run Time: 00:35:01

29: King's Indian: Orthodox, Taimanov Variation The Six-Point Bishop Redux Run Time: 00:31:10

30: Bird's Opening: Good News, Bad News, Good News Run Time: 00:27:52

31: Scotch Game: Instructive Endgame Imbalances Run Time: 00:35:17

195 Minutes