one Bishop opposed to a Rook, the latter may generally be exchanged for the Bishop, and as two Knights are insufficient of themselves to force checkmate, the game will be drawn." Writing shortly before Staunton, George Walker reached the same conclusions. Modern-day endgame tablebases confirm Walker and Staunton's assessments of both endings . Yet Reuben Fine, 94 years after Staunton, erroneously wrote in Basic Chess Endings that both types of rook versus three minor piece endings "are theoretically drawn" . Grandmaster Pal Benko, an endgame authority and like Fine a world-class player at his peak, perpetuated Fine's error in his 2003 revision of Basic Chess Endings . Grandmaster Andrew Soltis in a 2004 book expressly disagreed with Staunton, claiming that rook versus two bishops and knight is drawn with correct play . Endgame tablebases had already proven that Staunton was correct, and Soltis wrong, although it can take up to 68 moves to win . The modern period of chess endgame books begins with Theorie und Praxis der Endspiele (Theory and practice of the Endgame) by Johann Berger. This was published in 1891, revised in 1922, and supplemented in 1933. This was the standard work on practical endgames for decades . Many later books were based on Berger's book . Edward Freeborough wrote a 130-page book of analysis of the queen versus rook endgame, The Chess Ending, King & Queen against King & Rook, which was published in 1895. Henri Rinck (1870-1952) was a specialist in pawnless endgames and A. A. Troitsky (1866-1942) is famous for his analysis of two knights versus a pawn . In 1927 Ilya Rabinovich published a comprehensive book in Russian titled The Endgame, which was designed for teaching. An updated version appeared in 1938 . (An English version of the second edition was published in 2012 as The Russian Endgame Handbook.) Eugene Znosko-Borovsky published How to Play Chess Endings in 1940. In 1941, Reuben Fine published Basic Chess Endings, an attempt to collect all practical endgame knowledge into one volume. It is still useful today and has been revised by Pal Benko . Half of André Chéron's (1895–1980) book Traite Complet d'Echecs was about the endgame, and later he wrote Nouveau Traite Complet d'Echecs, which was a large book about the endgame. He later expanded that into the four-volume Lehr- und Handbuch der Endspiele in German, which was translated from the 1952 version in French