The "paradoxical hole" shown in fig. 13 and 14 above is an adaptation of Gianni Sarcone's original "paradoxical hole" (© 1997, G. Sarcone).

You can see more vanish puzzle effects created by the same author at:
http://www.archimedes-lab.org/page3b.html
http://www.archimedes-lab.org/workshopvanishbird.html
http://www.archimedes-lab.org/page5b.html
http://www.archimedes-lab.org/workshoptangram2.html

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