Eye liberties if almost-almost filled
Difficulty: Advanced Keywords: Life & Death, Tactics, Theory
The number of effective liberties of an almost-almost filled eye is the sum of the first N natural numbers (one for each filling stone) plus two (for the unfilled spots). The filling stones, of course, have to form a killing shape and must be extendable to another:
Author: Robert Pauli
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2024 the Authors,
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