Leonardo's story is a fascinating one. He rescued his brother from pirates by playing chess. Not only did he earn back the ransom he took with him, but he increased his earnings betting with the pirate captain. Then, he went to Spain to get his revenge on Lopez.
Yes I never dug deep into his back story that much. I was amused at his effort to try and get revenge lol on Lopez.
I honestly don't even know how his brother got captured or any of that. It is very interesting to say the least though. Saving his family member by a chess game. I guess that is what they mean by Sudden death chess match lol.
You posted the story. It's in the bottom image of post 261. That image is of a page in J.H. Sarratt, The Works of Damiano, Ruy-Lopez, and Salvio on the Game of Chess (1813).
It was referenced by jlconn early in this thread, but jlconn incorrectly attributed authorship to W. Lewis, who was Sarratt's student. Lewis wrote a similar work: Gioachino Greco on the Game of Chess (1819). Both works are readily available through Google Books and the Internet Archive. Sarratt's book is also available through a print on demand service through Amazon, as well as in an inexpensive Kindle version.

I think it was called Hits. My best friend loaned it to me. Well former best friend.