George Duke wrote on Fri, Mar 22, 2013 07:36 PM EDT:
First try. Alekhine-Black has two or three chances to move the Knight after
Move 28. Which one should he use?
By the same token, after 31 Rxg1, the whole Rook Black is up should be worth the three more or less passed Pawns in the board middle. Which of the two moments does Black go wrong? Mis-use of passive Knight, letting it be captured; or missed connections two Rooks and Queen against one Rook and Queen at and after Move 31?