Rules

The board is randomly filled with an equal number of red, green and blue pieces.

       1-  b
      2-  b b
     3-  b g r
    4-  g r g g
   5-  r b g r r
        \ \ \ \ \
         A B C D E

         R   G   B   Score
         ~   ~   ~   ~~~~~
Fred     0   0   0     0
Ted      0   0   0     0

Players take turns grabbing either a single piece or a contiguous line of pieces from the board.

The game ends when there are no pieces left on the board. Players count the number of colours for which they've grabbed an even number of pieces, and the winner is the player with the highest count.

For instance, the following game has been won by Fred, who has grabbed an even number of red pieces and an even number of green pieces. Ted has only grabbed an even number of blue pieces.

       1-  .
      2-  . .
     3-  . . .
    4-  . . . .
   5-  . . . . .
        \ \ \ \ \
         A B C D E

         R   G   B   Score
         ~   ~   ~   ~~~~~
Fred     4   0   1     2
Ted      1   5   4     1

If more than one player has the best count (possible in the three-player version) then the game is drawn. The counts of resigned players are ignored.

References and History

Trinim rules by Joan Josep.

Implementation and help file by Cameron Browne, April 2005.