You Built What?! A Supersize Robotic Chess Set

A veteran designer of Lego robots (he built one that plays Connect Four), Indiana programmer Steve Hassenplug was looking for something still grander. When he watched the first Harry Potter movie with his kids—the one with the magic chessboard and eight-foot-high knights—he knew he had found it. The massive "Monsterchess" set he created from more than 100,000 Lego pieces, however, required plenty of wizardry of its own.

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