Targeting Adjacent Cells After a Hit
Level: Basic
Prioritize the cells above, below, left, and right of a hit to finish finding the ship.
When a random shot scores a hit, that ship must extend in one of the four cardinal directions. Your next shot should be chosen from among the four neighbors of the hit cell as a rule.
Test the four directions in turn; a second hit reveals the ship's orientation. If a shot misses, rule out that direction and pursue the remaining ones.
This 'hunt to target' transition is the backbone of Battleship AI, and it's also the single most important habit for a human player.
Related Tactics
Intermediate
Locking In a Direction
Once two consecutive cells are hit, target only the two ends of that line.
BasicParity (Checkerboard) Search
Fire on every other cell like a checkerboard to guarantee grazing the smallest ship.