Tap a symbol to connect it to the picture.
Start with Learn for ten linked lessons. Puzzle lab uses a complete, solvable seven-piece demonstration. Your physical puzzle may use different pieces: enter them under Your pieces.
Drag the 3D view to move the camera. The x, y, z buttons in the lesson or lab rotate the piece. Use Layers to select cells hidden inside the cube. A dotted outline is an uncommitted preview.
Each coordinate names the center of a unit cube. The target coordinates are 0, 1, and 2 on each axis. Touch an equation term, coordinate, layer cell, or matrix column to see the corresponding geometry.
Fits here means no overlap and inside the target. Passes checks means the selected necessary conditions have not ruled it out. Verified completion means the exact solver has found an entire packing.
A packing describes final positions. It does not prove that solid pieces can slide into those positions in that order. Reflections are not allowed as moves.
Progress saves in this browser when storage is available. Export a JSON snapshot for a portable copy. All calculations run locally; this file needs no network connection.
Keyboard: tab to controls and press Enter or Space. Use the camera preset buttons and Layers instead of dragging. Reading view removes the split scrolling layout.