ConradCHESS .. 9 coins .. logic .. IM Conrad Goodman
You have 9 identical coins, but one is lighter than the other 8.
Using a balance scale, are 2, 3 or 4 weighs needed to find the lighter coin?
to these solvers as of
Danny Blanco, Niven Brown, Carlos Cunha, Pavel Doktor, Egon Feller, Albert Frank,
Joshua Green, Napawong Leelaprechalert, LW Luk, Will McGugan, Matthew Robinson,
Pierandrea Rosso, Bernard Sojka, Steven Steppe, Hennie van Jaarsveld,
Luc Vingerhoets, David Wang and Joe Wenger.
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