4
4×4 curated practice
2 curated levels
★ 1
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Curated Zip Puzzles by Size
Explore the fixed 50-level practice collection, from quick 4×4 starters to demanding 8×8 boards derived from verified official constraints.
5
5×5 curated practice
3 curated levels
★ 2
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6×6 curated practice
10 curated levels
★ 3
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7×7 curated practice
20 curated levels
★ 4
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8×8 curated practice
15 curated levels
★ 5
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