Wil Strijbos' Impossible Dovetail Puzzles are a set of three ingenious challenges known for their sleek, anodized aluminum design and inventive mechanisms. The puzzles include the Dovetail Concave, Dovetail Convex, and Dovetail T, each featuring a green piece trapped within the aluminum block. Inspired by the traditional dovetail woodworking joint, the pieces are seemingly locked in place, making them difficult to remove. Solving these puzzles requires out-of-the-box thinking, as Strijbos intentionally omits solution sheets, adding to their allure and complexity.