Who organized chess at first?

I am very curious to to know that who was the first chess organizer.  If you know then please share the answer.

An Arab King who hosted tournaments - from this resulted the first ever recorded game played by Abu'l- Faraj bin al-Muzaffar bin Sa'-id al-Lajlaj

Around 840 al-Adli ar Rumi (800-870) wrote Kitab ash-shatranj (Book of the chess) in Arabic. This is a lost manuscript, but referenced in later works. It was considered the first comprehensive book dealing with chess. We know of it through referring manuscripts that preserved some of its texts and chess problems. The text included chess history, openings, endings and mansubat (chess problems). The collection had hundreds of chess problems. He also classified chess players into five distinct classes. He also found a system for sorting out the openings into positions, which he called Tabiya. His lost work may have also been the first to describe the knight's tour.

A tournament in London in the early 19th century is widely considered the first organized Chess tournament in modern history, and the beginning of what we think of as organized Chess today.  Of course, there were undoubtedly tournaments at various medieval courts, as referenced above, but there is little knowledge of those tournaments today, and they weren't ongoing events. 

I'll go off to my bookshelf and see if I can find more information about the London tournament.