http://golf.shinh.org/p.rb?maze+solving maze.rb $z=gets('').split("\n") $y=$z[0].length $x=$z.length def peek(i,j) if i>$x||i<0||j<0||j>$y ;nil else ;$z[i][j..j] end end def poke(i,j,v) $z[i][j..j]=v end def deadnear(i,j) an =[] an+=[i,j-1…