Mahjongg Dimensions 640 Seconds
Ten and a half minutes on the largest stage in the set, long enough to plan for the whole cube instead of settling for its shell.

Six hundred and forty seconds on a cube of coloured blocks: Mahjongg Dimensions 640 Seconds is the roomiest of the standard-clock editions and the one that runs on the largest stage in the set, 800 by 600. The extra display space matters more than it sounds, because the tile faces here are distinguished by colour and geometry together.
Matching works as it does across the line, with identical patterns coming off when neither tile is covered and one side is exposed, but the ten-and-a-half-minute allowance shifts the target. On the short editions you clear what you can reach; here the realistic aim is the whole block, which means planning removals so the inner tiles are freed rather than merely uncovered. For one more rotating board, see Fandango Mahjongg.
Rotation stays the core skill. The visible face is a quarter of the board at best, and turning the block after every few clearances keeps the supply of legal pairs steady instead of letting it dry up on one wall. The Dimensions list lists every board filed under this heading.
Full screen is still worth switching on despite the larger stage, since colours read more cleanly at size and a cube seen large is easier to hold in your head as you rotate it. Mahjong Kings and Knights sets the same turning puzzle in another dressing.
Controls
Mouse on a desktop, or tap the tiles on a touchscreen.
How to Play
- Look over each face of the cube by rotating it before your first match.
- Take identical patterns that sit free on the outer edges of the structure.
- Rotate again after a few removals to reveal the tiles that have just become legal.
- Clear as many blocks as you can before the six hundred and forty seconds run out.
Tips & Tricks
- Aim to finish — this allowance is long enough for the whole cube, so plan removals that free the interior.
- Follow the colour — patterns repeat across shades, and checking colour first narrows the search fast.
- Rotate as a habit — every few pairs, turn the block rather than waiting until the front runs dry.
- Do not stall — a pair taken now usually unlocks two more, while a pair studied costs the clock for nothing.
- Use full screen — the 800 by 600 stage is the largest in the family, and it rewards being given the whole display.
Frequently Asked Questions
How long is a level in Mahjongg Dimensions 640 Seconds?
Six hundred and forty seconds, which is long enough to aim at clearing the whole cube rather than part of it.
How do you reach the tiles inside the cube in Mahjongg Dimensions 640 Seconds?
By removing the pieces resting on them. Nothing in the interior is legal until its cover has gone.
Why rotate the block in Mahjongg Dimensions 640 Seconds?
Because only a fraction of the faces are visible at once, and the pairs you need are often on the wall behind.
How large is the board in Mahjongg Dimensions 640 Seconds?
It runs at 800 by 600, the biggest stage among these timed cube editions.
Does Mahjongg Dimensions 640 Seconds have a full screen mode?
Yes, and colour differences between similar patterns hold up better when the cube is displayed large.
