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just a useful quick note about computing the nimber for such a game:
When played with a forest of “trees” (Colon Principle): When branches come together at a vertex, one may replace the branches by a non-branching stalk of length equal to their nim sum.
Deforestation
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just a useful quick note about computing the nimber for such a game:
reference: http://web.mit.edu/sp.268/www/nim.pdf page 19