%
% The Rogo problem Intro 6
% 
% http://www.rogopuzzle.co.nz/paper-rogos/intro-rogo-6/
%
% Note: this problem has 16 optimal solutions.
% 
5
9
16
43
W W 5 2 4 1 W W W
W 4 W B W W 7 W W
2 W W W 7 W 6 W 5
1 4 W 3 W W W 6 B
B B 7 W W 3 W 1 B