
Re: 4 colors problem
Posted:
Mar 4, 2014 5:13 PM


"make a move?... just replace D* with C; checkerboard is just one of the easy cases, even with your midification, as many books will show you, after a few "ubits of study
> c d a d c d a d c d a b > > a b c b a b c b a b c d > > c [d d d d d d d d] d* a b > > a b c b a b c b a b c d > > c d a d c d a d c d a b > > > > The "d" after [d d d d d d d d] cannot make a move without > > breaking the "no two countries using the same color" rule

