George Duke wrote on Mon, Aug 13, 2012 11:25 AM EDT:
Http://www.chessgames.com/perl/chessgame?gid=1128889. That Game 13 played
10.August.1972 has prior
http://www.chessvariants.org/index/displaycomment.php?commentid=29382.
Where does White go wrong? At dilly-dallying Move 25 Qc3. Queen wants to keep the off-center diagonal c1-h6 if possible. The contested space is e6, as evidenced after the fact by Fischer's 26 ...e6. How about White's going 25 f5...? Peculiarly no piece either side has a very good move for a turn or two here. The focus after 25 f5... becomes on handling the Pawns in the northeast quadrant. Dreadful for Black because right in front of Black King. This way the f-Pawn gets moved twice in three moves and may well be a third time by another move or two. If it is going to drag on, all three Rook, Rook and Queen of White have incredible mobility compared to their counterparts. With the accompanying Knight move Spassky made pushing back the Queen, Fischer is on the wall.