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How to Play
Drag a piece onto the board — cover every cell to win.
Long-press while dragging (or use the ROT button) to rotate a piece.
Made a mistake? The Undo button sits at the bottom-left of the board, next to Sound.
A gold cell marks a row that is one piece away from completion.
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Drag a piece onto the board — cover every cell to win
Diamond Puzzle
Game Stats
Score
0 / 0
Time
00:00
Moves
0
Games Played
0
Lines Cleared
0
Difficulty
Controls
How to Play
Goal
Drag every shaped piece onto the 3D board so that the whole grid is covered. Completing a row makes it glow gold; cover every cell to solve the puzzle.
Controls
Drag a piece onto the board and release it on a valid empty spot — green cells confirm the drop, red cells reject it.
Right-click a piece (or press R while dragging) to rotate it. On touch, long-press while dragging.
Press Ctrl+Z (or the Undo button) to take a move back, H for a hint, M to mute.
Difficulty
Boards grow from 6×6 to 9×9 to 12×12, and the pieces get larger and more awkward as the difficulty rises.
Tips
Fill corners and edges early — awkward shapes fit there far more easily than in the middle.
Keep your options open: squeezing a big piece into a tight pocket can strand the rest.
A gold cell marks a row that is one piece away from completion — finishing it is free progress.
There is no penalty for undoing. If a placement looks risky, try it and take it back.
Puzzle Complete!
★★★
Flawless run — no hints, no undos
You scored 0 points!
Time00:00
Moves0
Hints0
Out of Moves
No remaining piece fits the board. Take the last move back, or start fresh.
About 3D Grid Block History, Strategy & Tips
3D Grid Block is a spatial packing puzzle. You are handed the complete set of pieces up front and must drag them onto the board so that every cell of the grid is covered. Complete a row and it glows gold in celebration; fill the entire board and the puzzle is solved.
Because nothing is cleared away, every placement is permanent until you undo it — the game rewards reading the whole board, matching awkward shapes to the gaps they fit, and keeping enough room open for the pieces still waiting in the tray.
The History of 3D Grid Block
3D Grid Block descends from the polyomino tiling tradition: the same family of shapes that made pentomino puzzles a mid-century craze and still powers modern packing games. The classic challenge — cover a grid exactly with a fixed set of pieces — is rendered here in three dimensions, with pieces you can pick up, rotate in space and preview against the board before committing.
The enduring appeal of tiling puzzles is their blend of simple rules and deep strategy: anyone can put a block on the board, but covering the final cells without stranding a shape is a genuine skill.
Solving Strategies
Corners and edges first
Awkward shapes fit against walls and corners far more easily than in open space. Placing your most difficult pieces on the border early keeps the flexible middle of the board open for everything else.
Watch for the gold cell
When a row is one piece away from completion, its empty cell pulses gold. Finishing a row is satisfying progress — and often the cheapest way to tidy a cluttered region before it becomes a trap.
Place big pieces where they keep options open
A large piece slammed into the middle can carve the board into pockets no remaining piece can fill. Before committing, check the tray: the space you leave behind should still match the shapes you have yet to place.
3D Grid Block FAQ
How do I place a piece?
Drag a piece from the tray onto the board — green cells confirm a valid drop, red cells reject it. Right-click a piece (or press R while dragging) to rotate it first.
What do the gold cells mean?
A gold cell marks a row that needs exactly one more piece to be complete. Completing a row flashes the whole line in gold as progress toward covering the board.
How does the game end?
You win by covering every cell of the board. If no remaining piece fits anywhere, the board is deadlocked — use Undo to take a move back, or start a new game.
How does difficulty change?
The board grows from 6×6 (Easy) to 9×9 (Medium) to 12×12 (Hard), and pieces get larger and more awkward as the difficulty rises.