Edge template

An edge template is a pattern which guarantees a connection the edge. Here is an example of a third-row edge template (template IIIa, also known as the Ziggurat):

R3 C4 Vc1 Sa1 Sb1 Sa2

The cells marked by a star are irrelevant to the template, and can be occupied by either player, or can be empty. Even if Blue moves first, there is no way he can prevent from connecting to the bottom.

Countless edge templates can be constructed; some of them happen frequently and everybody should be familiar with them. Some are less frequent, but can still be useful to know.


 * Edge templates everybody should know
 * Edge templates with one stone
 * Edge templates with two adjacent stones
 * Edge templates with a bridge