George Duke wrote on Fri, Jul 20, 2012 11:28 AM EDT:
What was happening forty yrs. ago to the day? Game 5 played 20.July.1972.
Just the four moves first define this one's opening, Nimzo-Indian
Defense: Huebner Variation.
Http://www.chessgames.com/perl/chessgame?gid=1044723. With Fischer win,
series ties 2.5 - 2.5. ////////////////// Tucking the Bishop behind the Pawns is far the most regular continuation, so Spassky can be said to vary with 5 e3. Well, sort of, since a transpositional search shows once the Pawn is at e3, it is Gligoric System, a different classification for games past played, where the e2-e3 gets played at move 4 not move 5. Yet either way after White's fifth it is the exact same board position, just the different ways to arrive there.