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Controls
- Balanced
- ← or B · Balanced button
- Broken
- → or X · Broken button
How to play
Is every ( [ { closed by the right partner, in the right order? Answer as many lines as you can in 60 seconds. The lines get more deeply nested as you go.
Balanced meansEvery ( [ and { has a matching closer of the same kind, and pairs nest properly: ( [ ) ] is broken even though the counts match.
The slipsBroken lines have exactly one realistic mistake: a missing bracket, the wrong kind of closer, or two closers in the wrong order. Lines nest deeper every six correct answers.
TipRead from the innermost brackets outward, or keep a mental stack: push on every opener, and each closer must match the last one pushed.
1 player · Keyboard · Mouse · Touch
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