Dennis LaRue familiarizes beginners with properties and patterns of pins and discovered attacks. See simple puzzles and a classic from 1905.
2017.01.17
Akiba Rubinstein vs Jacques Mieses, First Match (1905): D52 Queen’s Gambit Declined, Cambridge Springs defence, Bogoljubow variation
http://www.chessgames.com/perl/chessgame?gid=1479802