hook: classic contra corners with inactive opportunities
by: Chestnut
formation: proper
| A1 | 8 | ones down the outsides and turn alone
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| 8 | ones up the outsides
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| A2 | 8 | ones down the center and turn alone
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| 8 | ones up the center and cast around same-role neighbors - note next neighbors below ⁋
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| B1 | 16 | ones contra corners
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| B2 | 16 | partners balance & swing, end facing up the hall (away from new neighbors)
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