A Kenyan game whose name means “body of water”, played on an octagon of eight points around a central pool. Your three “water fleas” only move — sliding one step along a line to the empty point. Line up three through the centre to win.
The centre pool is on every winning line, so seize it and hold it — from the centre you threaten to complete a line in four directions. Block by keeping a flea on the outer point that would complete the AI’s line through the middle.