The optimal strategy can be determined from the current state. This is the principle behind minimax. In a perfect information zero sum game, we can theoretical

The optimal strategy can be determined from the current state. This is the principle behind minimax. In a perfect information zero sum game, we can theoretically draw a complete game tree, each terminal node ending with a win, loss, or draw. With a full understanding of the game tree we can make moves to minimize our opponent’s best move.