Struct MctsConfig

pub struct MctsConfig<const N: usize> {
    pub exploration_coef: f64,
    pub selection_function: SelectionFunction<N>,
}

Configuration parameters for a single Monte Carlo Tree Search (MCTS) instance.

This struct allows customization of MCTS behavior, including the exploration-exploitation balance and the specific function used to calculate node selection scores.

Type Parameters

• N: The number of possible actions in the game.

Fields

exploration_coef: f64

The exploration coefficient (often denoted as C_p or C_u) used in the selection phase.

A higher value encourages more exploration of less-visited nodes, while a lower value prioritizes exploitation of known good paths.

selection_function: SelectionFunction<N>

The function used to calculate the selection score for a child node during MCTS traversal.

This function typically balances exploitation (based on value) and exploration (based on visits). You can use provided functions like ucb1 or default_selection_score, or define your own.

Implementations

impl<const N: usize> MctsConfig<N>

pub const DEFAULT: MctsConfig<N>

The default MCTS configuration.

• exploration_coef: std::f64::consts::SQRT_2 (approximately 1.414), a common choice for UCB1.
• selection_function: default_selection_score, the default formula.