SABOTAGE MALTHUS

Initial setup:

  abcdefghijklmnopqrstuvwxy   
        . . . . . . .         1
       . . . . . . x .        2
      . . o . . . x . .       3
     . . . . . . . . . .      4
    . . . . . . . . . . .     5
   . . . . . . . . . . . .    6
  . x x . . . . . . . o o .   7
   . . . . . . . . . . . .    8
    . . . . . . . . . . .     9
     . . . . . . . . . .     10
      . . o . . . x . .      11
       . o . . . . x .       12
        . . . . . . .        13
  abcdefghijklmnopqrstuvwxy

The mover places stones of either colour on empty spaces; as many (unrestricted) per turn as he has groups size 2 or more.

The game ends when the board is full or both consecutively pass; the player with the largest connected group (recursively), wins.

Recursive scoring means that if both largest groups are equal, then it's the 2nd largest groups that decide the match (and so on, if they are also equal...)

Game Sample:

  abcdefghijklmnopqrstuvwxy     
       x x . . o x x         1.  j4  p12  (O started)
      . . o o o x x x        2.  f12 g13 q13
     . . o x x x x o o       3.  o11 c9  e9
    . . o o x o x o . .      4.  g1  i1  y7  x8
   . . o x x x o x o x x     5.  r4 s3 d6 t10 u11
  o o o o x x o o x o . o    6.  m7 o7 l6 l8  k5 k9
 . x x . o x x x o x o o x   7.  n5 o5 f6 i7 q7 h8 p8
  . . o o x x x o o x o x    8.  t2 m3 o3 l4 g11 h10 j10
   o o x x x o o . o o .     9.  lm2 s5 px6 m9 lpq10 k11 o13
    x x x x o x o o o .      10. i5 J2 H6  F8 O9
     x x o o x o x . o       11. o1 h4 g5 i14 u3
      x o . o . o x X        12. (more moves not recorded)
       x o . o o x .         13.
  abcdefghijklmnopqrstuvwxyz#:-

O: 2 groups     largest is 34
X: 7 groups     largest is 37


O resigned in this position, since he can only play two stones per turn (against 7 stones from X), but he would have needed three stones so that his largest group would also consist of 37 stones. If that happenend, O would win because he has the 2nd largest group.