MONOCHROMATIC WHISTLING

MONOCHROMATIC WHISTLING

* On each turn, a player must either move or capture.
* A move is any number of unoccupied spaces in a straight line.
  A moved piece must end geometrically closer to at least one enemy piece.
* A capture is either
 (a) by whistling: a piece moves as above, and any enemy pieces
     which were adjacent to the line of movement, but not adjacent
     to the starting or finishing cell, are removed.
     Captures of this sort may be chained together (checkerswise).
 (b) by crushing: a piece adjacent to any enemy may capture and replace it.
* Capture is compulsory, with mandatory maximum capture (otherwise free).
* A player loses when he has no pieces left.
* After 20 consecutive non-capturing moves by each player, it is a draw.

Game Sample
    == XXX ==       == OOO ==
 1. s1-q1            h8-L8
 2. q1-i9:-c9: (f)   L8-C16:2-o1:2 (f)
 3. t2-l2:o1         g7-c11:c9
 4. i15-c9:c11 (f)   h6-b12:c9
 5. l2-e9:f6e7       x20-B20
 6. g15-b10:b12(f)   B20-M9:3  
 7. J15-M13          M9-N10
 8. v2-z2            N10-I15:M13-e15:2
 9. z2-L14:2         e15:f16 (f)
10. g17:f16          I7-M11
11. u1-A1            M11-G17::-r2:-D2:
12. resign

,'"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNO
1            . . . . . . . . : . .          
2           . . . . , . . . . . o .          
3          . . . . . . : . . . . . .          
4         . . . . . . . . . . . . . .          
5        . . . . . . . . . . . . . o o          
6       . . . . . . . . . . . . . . o o          
7      . . . . . . . . . . . . . . . . .          
8     . . . . . . . . . . . . . . . . . .          
9    x x . . . . . . . . . . . . . . . . .          
10  x . . . . . . . . . . . . . . . . . . .          
11 . . . . . . . . . . . . . . . . . . . , .
12  . . . . . . . . . . . . . . . . . . . .          
13   . . . . . . . . . . . . . . . . . . .          
14    . . . . . . . . . . . . . . . . . :          
15     . . . . . . . . . . . . . . . . .          
16      x . . . . . . . . . . . . . . :          
17       . x . . . . . . . . . . . , .          
18        . . . . . . . . . . . . . .          
19         . . . . . . o o . . . . .          
20          . . . . . o o . . . . .                    
21           . . . . . o o . . . .                      
`-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNO

This is a game of sacrifices to obtain larger captures. There are two ways of capture, but the whistling mecanism is a novel idea due to Bill Taylor.