I'd never seen that before. A thing of beauty! Frank Marshall was a true pioneer of the game, yet often gets forgotten compared with his more illustrious peers like Lasker, Capablanca and Alekhine.
Nice move, but all that it gets from me is a nod of approval and a cautious thumbs up. I really can't see what makes it "the greatest move in chess history" - isn't chess all about moves like that, and thinking several moves ahead? But that most likely just shows my lack of knowledge about the game...
I don't play these days, but used to be a half decent player. That is a masterstroke. Thanks to the OP for sharing.
I meant white castle 1 square left, next to the king, sacrificed to the black knight which would then be taken by the king. This would be the next move if the game hadn't been conceded.
Leaving your queen in a position where it can be captured in 3 different ways, all of which lead to a win is pretty spectacular in my book!