Added a readme.

readme.md

@@ -0,0 +1,3 @@
+Homework that I did for an AI class that Harvard offered. Sadly I 
+never got a chance to finish said class, but I figured these early projects 
+would be worth archiving.

sketch.js

@@ -38,7 +38,7 @@ function draw() {
 	noLoop();
 }
 
-function nextTurn() {
+function nextTurn() { //minimax
 	let bestScore = players[currentPlayer] == 'X' ? -Infinity : Infinity;
 	let move;
 	
@@ -90,7 +90,6 @@ function minimaxPrune(board, alpha, beta, isMaximizing){
 					board[i][j] = 'X';
 					let score = minimaxPrune(board, alpha, beta, false);
 					board[i][j] = '';
-					
 					bestScore = max(score, bestScore);
 					alpha = max(alpha, bestScore);
 					
@@ -109,7 +108,7 @@ function minimaxPrune(board, alpha, beta, isMaximizing){
 					board[i][j] = 'O';
 					let score = minimaxPrune(board, alpha, beta, true);
 					board[i][j] = '';
-					
+					if (score > 1 || score < -1) print(score);
 					bestScore = min(score, bestScore);
 					beta = min(beta, bestScore);
 					
@@ -162,7 +161,7 @@ function minimax(board, isMaximizing){
 
 function checkWinner(board, showEnd = false){
 	let winner = null;
-	
+	// Horizontal
 	for(let i = 0; i < 3; i++){
 		if(board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][0] != ''){
 			winner = board[i][0];
@@ -175,6 +174,7 @@ function checkWinner(board, showEnd = false){
 		}
 	}
 	
+	// Vertical
 	for(let i = 0; i < 3; i++){
 		if(board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[0][i] != ''){
 			winner = board[0][i];
@@ -186,7 +186,7 @@ function checkWinner(board, showEnd = false){
 			if(showEnd) line(x, 0, x, width);
 		}
 	}
-	
+	// Diagonal
 	if(board[0][0] != '' && board[0][0] == board[1][1] && board[2][2] == board[0][0]){
 		winner = board[0][0];
 		if(showEnd) line(0, 0, width, width);