Cubi 25 – Expert Packing Puzzle by Pelikan Puzzles

Cubi 25 – Expert Packing Puzzle by Pelikan Puzzles

Cubi 25 is an expert-level wooden packing puzzle designed by Frederic Boucher and produced by Pelikan Puzzles. Widely regarded as the most demanding entry in the Cubi series, this puzzle pushes spatial reasoning to its limits through complex piece geometry, tight constraints, and a highly rewarding solution.

Your objective is to pack all pieces completely into the box so that nothing protrudes above the top surface. The challenge is intensified by half-voxel elements fixed to the interior walls and by movable pieces that themselves include half-length segments. These subtle differences dramatically affect how the pieces interact, requiring careful analysis, rotational moves, and precise sequencing.

Specifications:

• Designer: Frederic Boucher
• Producer: Pelikan Puzzles
• Puzzle Type: Packing
• Difficulty Level: Expert
• Dimensions: 65 mm × 65 mm × 63 mm (approx. 2.56 in × 2.56 in × 2.48 in)
• Material: Mahogany and Zebrano

Features:

• Half-Voxel Constraints: Fixed interior elements and irregular piece lengths dramatically reduce viable configurations.
• External Cube Assembly: Finding a valid cube shape outside the box is often the key first step.
• Rotation & Sliding Required: The final insertion demands careful rotational maneuvers and controlled sliding.
• High Piece Density: With 25 voxels plus fixed halves, the box leaves very little room for error.
• Premium Hardwood Construction: Crafted from richly grained Zebrano with a Mahogany box.

Why You'll Enjoy It:

Cubi 25 is a true test of patience, logic, and spatial visualization, offering experienced puzzlers a deeply satisfying challenge. The long search for a workable configuration, followed by the precise execution of the final sequence, delivers a powerful “aha!” moment that makes this puzzle a standout finale to the Cubi series.

Notes:

• Natural Material Notice: Wood grain and coloration will vary; each puzzle is unique.
• Care: Use only for its intended purpose to preserve fit and finish.
• Safety: Contains small pieces.