PROGRESSIVE FENCES

Cul-de-sac with L-shaped walls allowed.
Walls may be placed along edges, but not beyond them.
Win by crossing over the target edge.

The turns are progressively 1 2 2 3 4 4 5 6 6... moves, with a move being
one orthogonal step by the player's stone, or one length of 2-wall placement.
A player may distribute his available moves as he pleases (so placing a wall
costs two moves), subject to not being permitted to completely wall off
his opponent from his target.

Sample game (notation: Xy* means that a wall was placed at coordinate Xy with a certain shape given by symbol *. If * is 1,2,3 or 4 it means a L-shaped wall on the 1st, 2nd, 3rd or 4th quadrants; if * is - means a horizontal wall with center Xy; and if * is | means a vertical wall with center Xy):

1. S (Bottom)                   1        
2. NN                           2        
3. SS                           2        
4. N Fi-                        3        
5. Fh4 Hh3                      4        
6. Fd| Ge2                      4        
7. NES Hj2                      5        
8. He2 Hc| Fb3                  6        
9. Fj4 Ej| Gb2                  6        
10 Ib| Jc| Id- E                7        
11. NNNESSEN                    8
12. Kb3 Kd4 Je- Hk|             8
13. NEESSWSWW                   9
14. If2 Gf- Ef1 Ed| Dc1        10
15. SWWWNNNWNW                 10
16. SWWSSWN Bk- Dk-            11
17. SSSSSE Bg- Dg- Dj-         12
18. WWNNNEEE Fg1 Hg4           12
19. Eh1 E2E Df-  Bf1 Bd- Ce1   13
20. Bb| Cc- NWWW Jg2 Kg3 Ki-   14
21. Bottom resigns

Final Position
                    Top's goal
   A   B   C   D   E   F   G   H   I   J   K   L
 a + - - - - - - - - - - - - - - - - - - - - - +
   :   |                   |       |           |
 b :   |   +   +   +---.---'   +   |   +---.   :
   :   |       |       |       |   |   |   |   :
 c :   +-------`---+   +   +   |   +   |   +   :
   :               |   |       |       |       :
 d :-------+   +   |   |   +   +-------+   ,---:
   :       |       |   |   |   |           |   :
 e :   +   +---+   +   +---'---'   +-------+   :
   :   |           |               |           :
 f :   +---+-------`---+-------+---'   +   +   :
   :     T             |               |       :
 g :-------+-------+   `---+   ,---+---'---.   :
   :               |         B |           |   :
 h :   +   +   +   +---,---+---.   +   +   +   :
   :                   |       |               :
 i :   +   +   +   +-------+   +   +   +-------:
   :               |           |               :
 j :   +   +-------|   ,---+---'   +   +   +   :
   :               |   |       |               :
 k :-------+-------+   +   +   |   +   +   +   :
   :                           |               :
 l + - - - - - - - - - - - - - - - - - - - - - +
   A   B   C   D   E   F   G   H   I   J   K   L
                   Bottom's goal