Stack Up
Sort five. Beat the clock.
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A new daily is ready. Your previous daily has ended.
Sort five. Beat the clock.
Saving is unavailable in this browser. Keep this tab open to preserve your current run.
A new daily is ready. Your previous daily has ended.
Put five things in the order shown. Check the direction: smallest to largest differs from largest to smallest. Drag a card with your mouse and release it in its new position. Press Escape to cancel a drag. You can also tap the arrow buttons or focus a card and press the arrow keys.
Each stack has 90 seconds. A correct first submission earns 100 points, regardless of time remaining. Each wrong submission takes 20 points off that stack, down to zero. Daily and Unlimited show the same 0–100 round scale.
A wrong order resets the stack streak. Cards briefly flash green for a correct position or red for an incorrect position; keep sorting and trying until time runs out. A timeout scores zero for that stack and reveals the answer.
New Daily scores are the average of the five round scores. Previously saved runs retain their original final-score calculation, displayed out of 100. Daily has five stacks and one saved run per day. The clock keeps running if you leave mid-stack or open help. Unlimited is free practice and doesn't affect daily stats.
A perfect run clears all five stacks with no wrong guesses or timeouts. Round scores and Daily scores are bounded to 0–100. These are your real completed daily runs; Unlimited scores aren't included.
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