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One threat can be blocked. Two threats created by the same stone often cannot. Learn how forks form and how to spot them early.

Center, edge and corner points do not offer the same attacking room. Counting lines explains why strong openings stay near the middle.

Gomoku is easy to encode and brutal to search. That combination has supported decades of work on threat search, pruning and neural networks.

Freestyle, standard Gomoku, Renju and Caro look alike at first. Overlines, forbidden moves and blocked fives make them play differently.

The first world title was awarded in Kyoto in 1989. Then the event vanished for eighteen years before balanced openings brought it back.

Gomoku's first-player advantage did not disappear. Swap2 made the opening player's job much more uncomfortable, which is exactly the point.