While I am caveating this with the proviso that there is no true replacement for FoolProofing every single Logic Game, the question is still valuable.
Is it possible to attain the general skills you need for ALL logic games by focusing only on the very hardest games? i.e., in mastering only the hardest games, are you in effect mastering all concepts featured in the easier ones? The below are listed on LSAT Blog as the ten hardest games:
PrepTest 23 (October 1997), Game 2 - Applicants being interviewed and hired (Combination: Grouping: Selection and Grouping: Splitting)
PrepTest 24 (December 1997), Game 3 - Juarez and Rosenberg review introductory and advanced textbooks
PrepTest 25 (June 1998), Game 2 - Tourists and Guides (Grouping: Matching)
PrepTest 27 (December 1998), Game 2 - Lizards and snakes in a reptile house (Combination: Linear and Grouping: Matching)
PrepTest 31 (June 2000), Game 2 - Music store's new and used CDs (Grouping: Selection / In and Out)
PrepTest 33 (December 2000), Game 3 - Stones: rubies, sapphires, topazes (Grouping: Selection / In and Out)
PrepTest 34 (June 2001), Game 4 - Randsborough/Souderton Clinics (Grouping: Splitting)
PrepTest 36 (December 2001), Game 3 - Window and aisle seats on a bus (Advanced Linear)
PrepTest 40 (June 2003), Game 3 - Flight connections on Zephyr Airlines: Honolulu, Montreal, Philadelphia, Toronto, Vancouver (Grouping: Mapping)
PrepTest 57 (June 2009), Game 3 - Dinosaurs: iguanadon, lambeosaur, plateosaur, stegosaur, tyrannosaur, ultrasaur, velociraptor and Colors: green, mauve, red, yellow (Combination of Grouping: Selection / In-and-Out and Grouping: Matching)
If I fully mastered these (getting them to well below JY's target time, missing zero, all inferences made from memory), would that suffice for LG mastery?
~xqr
@ I found a tablet with a stylus invaluable. I took a Samsung Galaxy Tab A w/ S Pen on travel with me, loaded it full of prep test PDFs, and was able to study on the train, in cafes, and on the beach. It totally obviates the need for printing, and is awesome for Blind Review.
Of course nothing replaces testing under LSAT conditions, so this is only a gap fill.