Perfect Square · draw a closed square in one stroke
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Click and drag to start drawing. Release to finish.
How it works
- Press and hold to start drawing, drag to trace, release to finish.
- The stroke must be closed (end near the start).
- We compute: 4 corner angles (target 90°) + 4 side ratios (target 1:1).
- Score: 100% × angle accuracy × side ratio accuracy × closure.
- World record territory is above 95%. Cheating with rulers will be noticed.