Roy Leban - ipuz: An Open Standard Format for "Pencil and Paper" Puzzles - G4G12 April 2016
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A 6-minute video from G4G Celebration: “Roy Leban - ipuz: An Open Standard Format for "Pencil and Paper" Puzzles - G4G12 April 2016”.
Video by G4G Celebration, played through YouTube's embedded player.