I realized afterwards, that if ...♗xc4, then 36. ♖xd7 ♕xd7 37. ♕xf6+ ♔h5 (forced) 38. ♙g4+ ♔h4 (forced) 39. ♕h6#

If instead of the move played, Black had captured the "en prise" Bishop, play might have continued 35...Bxc4 36. Rxd7 Qxd7 (36...Qe6 37. Rxa7 ) 37. g4+ Kh4 38. Qh6#.

Interestingly, if the game had continued, Black would have faced the same fate after <36... Qxf5> (36... Bxc4 37. Qxc6 ) <37. Bxe6> Qxe6 (37... Qxf3 38. gxf3 wins a piece) 38. Rxd7 Qxd7 39. Qf6+ Kh5 40. g4+ Kh4 41. Qh6# 1-0

1. the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes;

2. the nature of the copyrighted work;

3. the amount and substantiality of the portion used in relation to the copyrighted work as a whole; and

1) the npurpose wasn't commercial.
3) 0.005 is a small fraction of a work.
4) if people like the annotation they are more likely to buy the book, as I don't think the annotations to this one game are enough to make people feel they already know what the book has to offer.

2. We wouldn't turn you in even if you weren't. We're your friends.

This puzzle is hard in the way that some composed problems are hard. When you look at it you notice that you have Qh5+ whenever you want to play it, but unfortunately it doesn't do anything. So you naturally try to think of ways that you can force a position where Qh5+ would be a winning move.

Of course, this whole line of reasoning is a dead end. You'd have to trick Black into putting a piece on g7, but there's no way to do that, so Qh5+ is good for nothing. But the patzer in you is saying "A check is a check! You can't checkmate without a check!" And so you are loathe to play any move which gives up the one resource you have on the board, Qh5+. Of course, the winning move is do exactly that, abandoning the worthless Qh5+ for the crushing Qxf6+.