Crossline is a mathematical game published in the october 2009 issue of Games Magazine. It's a pencil and paper game between two people.
Players begin by drawing a circle with ten dots evenly spaced around it (the spacing can be approximate).
The first player starts by drawing a straight line connecting any two dots that are not adjacent. After that, each player in turns draws a straight line that connects any two dots and that crosses exactly one (and only one) previously drawn line.
The player who draws the last legal line is the winner.
Abstract Strategy · Line Drawing, Paper-and-Pencil
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