Elcock, E.W.


Automatic description and recognition of board patterns in Go-Moku

Classics

In any of the board positions of Figure 1 white play at node 1 has the consequence that a 5-pattern can be completed at the next white move whatever the intervening black move: if black plays node l' (1') then white plays 1 (1'). Figure 1 shows a board position in which, after play at node The essential content of this (and similar) board positions is: there exists a node which is a constituent of two possible 5-patterns, with two pieces played, on each of two lines through the node. Play at the explicit node creates a set of realisations of the object described in Example 2 with no node common to all of them and which consequently cannot all be destroyed by the opponent's next move. In the board position of Figure 1, after play at node 1 a realisation of the objects described in Examples 2 and 3 is created at nodes l' and 2 respectively.