Strange behaviour in a function while implementing the alpha-beta pruning algorithm

Question

I\'ve implemented a minimax algorithm with alpha-beta pruning. In order to get the best move, I call the alpha-beta algorithm with the rootAlphaBeta function. H

Answer 1

Your rootAlphaBeta doesn't update the alpha value. It calls all its child nodes with the full range of (-inf, inf), when it could have narrowed down the range for all child nodes except the first. This will prevent pruning of some branches which will have no effect on the final score, and increase the node count.