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"There is a kind of game in which one applies a cardboard mask (the mask of the game) over a given text. It offers differently spaced orifices which, when the mask is pushed to slide over any given page, reveal alternate images, words or numbers. A similar resource with punched holes was used in the first programming machines and it lay behind the project for the “Analytical Engine” created by Babbage and Byron´s daughter, Lady Ada Lovelace. Ada was a dedicated mathematician, and in the memoir she wrote she carefully described his innovative designs  [ - Augusta Ada Byron was born on 10 December 1815 and named after  Byron's half sister, Augusta, who had been his mistress. In 1833 Ada met Babbage. Under Babbage's  supervision she added extensive notes (c.f. Science and Reform, Selected Works of Charles Babbage, by Anthony Hyman) to the description of the engines. Her memoirs offer a detailed information of Babbage´s Analytical Engine (c.f  Gödel, Escher, Bach: An eternal golden braid, by Douglas R. Hofstadter. Vintage books,1980).
Cf. “ On the Scrabble board, however, this same wild and weak Ada was transformed into a sort of graceful computing machine, endowed, moreover, with phenomenal luck, and would greatly surpass baffled Van in acumen, foresight and exploitation of chance, when shaping appetizing long words from the most unpromising scraps and collops” (A, 178)].
Without being, in itself, the key for any coding system, Mascodagama´s trivial masks and reversals may serve as an indication of a pattern in “Ada”, hidden texts that require a specific code to be unraveled. I see this “mask of the game” as something that suggests a device similar to a modern template mask that can bring a still mysterious unity to “Ada” and to its “true or false” words or monstrous composite “logogriphs”(A,176).