Here's a check-list of techniques to explore for improving this chess-bot

[tkhalim14]

1. We can store moves that cause beta cutoffs at each depth. These moves we can try early in subsequent searches at the same depth, as it's likely to be good again.
2. Prioritize capturing high-value pieces with low-value attackers like pawn taking queen for quick gains early in the match.
3. Iterative deepening search

[AnandShegde]

2, 3 are already implemented.