Defending the AI’s Turf and Stealing Center Stage
The computer now knows how to take action when it’s one tile away from a win. In the five-step outline for the AI, the second priority was finding and blocking a human player’s winning tile; basically, the AI wants to defend its turf. The methods from step 1 are generic enough that you can reuse them to defend the AI’s turf in step 2. The only difference is that you have to pass the human player ID instead of the computer ID to rowCheck and setImageForSpot:
// The player has two in a row if let result = rowCheck(value: 1) { var whereToPlayResult = whereToPlay(result[0], pattern: result[1]) if !isOccupied(whereToPlayResult) { setImageForSpot(whereToPlayResult, ...
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