In my review of Informant 113 I noted a new column by Garry Kasparov entitled "Garry's Choice", where he looks at pretty much whatever suits his fancy. I subsequently elaborated on the subject of his first column, where he found a beautiful queen sac that could have arisen in the recent game Paragua-Debashis, New Delhi 2012, but, alas, was missed. He was unable to think of any suitable predecessor, but that's only because the remarkable game MacDonald-Burn, which isn't in the best-known commercial database, had escaped his attention.
What's even more remarkable, perhaps, is that today's action at the U.S. Women's Championship provided a great successor, or at least the potential for one. (A big tip of the lid to Danny Olim for mentioning this game.) Here's the position after White's 34th move in the game Alena Kats - Camilla Baginskaite:
Black's last move was 33...b2-b1Q, to which White replied by smashing the door with 34.Nf4xg6. The door may be smashed, but the doorway is not yet open and the invaders remain outside. Baginskaite couldn't find a solution, and resigned after 34...Qxh2+ 35.Kxh2 Qc2+ 36.Kh1. Alas, she missed her chance. The right move was...well, you've probably already guessed it, based on the previous posts, but try to work out all the details for yourself before checking out the solution. Interestingly, part of the solution itself has a "great predecessor", and I think that predecessor bears some resemblance to the tactic Kasparov highlighted in his column. We've come full circle, and so I'll disembark the merry-go-round here.