Conjuring Credits

The Origins of Wonder

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Blocking Off in a Riffle Shuffle

In Charlatan, No. 2, 2000, p. 19, Karl Fulves credits John Scarne with inventing this technique in his teens. However, the first printed description was in Bill Zavis's “Aces Up” from The Sphinx, Vol. 49 No. 8, Oct. 1950, p. 174. Zavis doesn't recall how or when the idea came to him.