Pack the cube
A few solid pieces. One empty cube. Find how they fit together.
A 2 × 2 × 2 cube with two or three pieces.
Fill the space, piece by piece
Choose a piece, turn it, then choose its position. The outlined preview shows where it will go. There is no time limit.
This practice could not start. Reload the page to try again.
Reveal this puzzle? It will be marked as revealed, not solved. You can turn the finished cube to explore it.
- Active time
- Piece moves
- Hints used
- Solutions revealed
How this practice works
The pieces are rigid: you can turn them but never reflect or bend them. Only placements fully inside the cube without overlap are accepted.
The outline is a preview, not a placed piece. Turn the piece with X, Y or Z, choose a position, then select Place. Drag the picture to look around; arrow keys work too.
Select a placed piece to remove it. Undo restores the last placement or removal. A hint positions a piece without placing it; a reveal shows one complete solution.
Three puzzles make one practice round. Active time excludes time spent reviewing a completed puzzle or with this tab hidden. This is a spatial practice, not an intelligence test.
History and settings
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Give feedback
Optional and off by default. Share starts, completions, replays and error categories. For visits from ChatGPT, starts and completions can also include the first QuickenBrain page and broad country. No answers, drawings or names.
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