Iohorizontictactoeaix <2027>

function minimax(board, depth, isMaximizing) { if (checkWin(board, 'O')) return 10 - depth; if (checkWin(board, 'X')) return depth - 10; if (isDraw(board)) return 0; if (isMaximizing) { let best = -Infinity; for (let move of emptyCells(board)) { makeMove(move, 'O'); let score = minimax(board, depth + 1, false); undoMove(move); best = Math.max(score, best); } return best; } else { let best = Infinity; for (let move of emptyCells(board)) { makeMove(move, 'X'); let score = minimax(board, depth + 1, true); undoMove(move); best = Math.min(score, best); } return best; } } iohorizontictactoeaix

let board = [ ['', '', ''], ['', '', ''], ['', '', ''] ]; Each cell stores 'X' , 'O' , or '' . function checkWin(board, player) { for (let row = 0; row < 3; row++) { if (board[row][0] === player && board[row][1] === player && board[row][2] === player) { return true; } } return false; } 3.3 Draw Check No empty cells left without a winner → draw. 3.4 Turn Management Human player = 'X' (moves first by default). AI = 'O' (moves second). Part 4: Building the AI – From Random to Unbeatable Step 1: Random Move AI (Simple) Just choose an empty cell randomly. Pros: Easy to code. Cons: Loses most games. Step 2: Blocking AI Checks if human has two in a row horizontally → fills the third cell in that row. Step 3: Offensive AI Checks if AI itself has two in a row horizontally → completes the row to win. Step 4: Minimax AI (Unbeatable) Minimax evaluates all possible moves recursively, assuming both players play optimally. The AI picks the move that maximizes its chance of winning (or at least drawing). function aiMove() { let bestScore = -Infinity; let

Whether you’re a student, hobbyist, or teacher, implementing this game gives you a tangible artifact to share online — and maybe even dominate the .io leaderboards if you add networking later. AI = 'O' (moves second)

For horizontal-only tic-tac-toe, the game tree is smaller than standard tic-tac-toe because diagonals/columns are irrelevant. However, the optimal strategy still leads to a draw if both play perfectly — just like standard tic-tac-toe, but with different forced sequences.

Some variants keep the standard 3×3 board; others expand horizontally (e.g., 3×N board, where N ≥ 3), making longer rows possible.