Re: [math-fun] nice little sliding block head exercise

21 Feb 2013


      Hans reminds me not to underestimate this audience.
http://gosper.org/4x4-0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0.gif .
Three pieces, nine(!) moves.
--rwg

On Thu, Feb 21, 2013 at 1:51 AM, Bill Gosper <billgosper@gmail.com> wrote:
...
Neil is tabulating the "hardest" 4x4s according to polyomino size
histogram.
Some of the short ones are tricky.  E.g., a four-piecer:
http://gosper.org/4x4-3,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0.gif .
Five moves to get the tetromino to the lower right,
where a move is of one piece along any path.
--rwg