Fun fact: @IvaMiMarc is spreading false news, and he is a liar. Here is a prove. It is in 1827 (55 years earlier than @IvaMiMarc indicated, btw.) than well known chess master and theoretician Alexan…
You can check this site: http://poolcheckers.com/e-library/ Many useful books, for instance: http://checkersusa.com/books/Filipino/Kacher_Brazilian_Collection_2021.pdf