Deep learning methods, while demonstrating success in numerous domains, encounter specific challenges when applied to guide tree search algorithms. A primary limitation stems from the inherent complexity of representing the search space and the heuristic functions needed for effective guidance. Deep learning models, often treated as black boxes, can struggle to provide transparent and interpretable decision-making processes, crucial for understanding and debugging the search behavior. Furthermore, the substantial data requirements for training robust deep learning models may be prohibitive in scenarios where generating labeled data representing optimal search trajectories is expensive or impossible. This limitation leads to models that generalize poorly, especially when encountering novel or unseen search states.
The integration of deep learning into tree search aims to leverage its ability to learn complex patterns and approximate value functions. Historically, traditional tree search methods relied on handcrafted heuristics that often proved brittle and domain-specific. Deep learning offers the potential to learn these heuristics directly from data, resulting in more adaptable and generalizable search strategies. However, the benefits are contingent on addressing issues related to data efficiency, interpretability, and the potential for overfitting. Overcoming these hurdles is essential for realizing the full potential of deep learning in enhancing tree search algorithms.
