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Math Night
Supported by
the National Science Foundation
under Grant No. DBI-9975868
Guide Activities Supplements Links Schools
Math Night Logo(bottom)
Modules
Other Activities

Pencil and Paper Games
Sprouts
Pipelayer
Capture
Math Jeopardy

Pipelayer

Pipelayer is a game played with two grids of dots that are slightly offset from one another, as shown in the animation at the right. We will call them white and black dots. This examples has 6x7 and 7x6 grids of dots, but you can use more or less as long as they leave each player with one longer dimension. The long dimension should be one longer than the short dimension. The rules are as follows:

  • The players take turns moving by connecting two dots.

  • A player can only connect dots that are adjacent horizontally or vertically and also only dots of his own color. In the example the blue player owns the white dots and the red player owns the black dots.

  • No move may draw across another move.

  • To win a player must make a continuous connection from one side of the board to the other in the long direction for his color of dots. For the blue player in the example this is from left to right; the red player is trying to connect top to bottom. The blue player wins the example game and then his connecting path from left to right lights up yellow.



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