[r-t] Crambo - mystery solved(?)

[r.johnson at qmul.ac.uk]

Actually I mean any block of up to k consecutive rows or my upper bound
makes no sense.

R

> More generally what is the largest
> k(n) for which  there exists an extent on n which remains a legal touch if
> you strike out any k consecutive rows. (The fact that you can't have more
> than 2^{n/2} rows with any two differing by a legal change (proof an
> exercise
> to the reader) shows that k=2^{n/2} - 1 is an upper bound for k.)
>
> Robert
>
>
>
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