I agree with Michael, I think you've got it. And your 4x5 grid is the most "compact" arrangement of 20 cells. Eight pairs of digits occur twice (01, 06, 15, 28, 29, 39, 45, 78) and the pair 19 occurs three times. I'd declare this solution to be at least as good as any other, unless we want to add some new criterion to rank one 20-cell solution against another. On Wed, Jul 21, 2010 at 21:20, Eric Angelini <Eric.Angelini@kntv.be> wrote:
I have 20 cells: 29378 78154 60291 54360 This might be improved, I guess. Best, E. [...]
On Wed, Jul 21, 2010 at 19:24, Eric Angelini <Eric.Angelini@kntv.be> wrote:
[...] the "words" alone have to be found, not the path linking them. So you can find "0", of course, "1", "2", etc. And "10", "11", "12"... But for "19" (in my example) you have to add an extra digit "1"...
What would be a "minimal king's-tour spelling matrix" showing all integers from 0 to 100?
Double digits can be accomodated by the rule that a cell may be counted twice.
The attempt below is for sure not minimal (minimal = quantity of cells 24, here):
9 2 3 4 7 8 9 4 7 8 0 5 3 . 0 6 1 2 9 1 . . 5 4 3 6 4 .
-- Robert Munafo -- mrob.com