Minimax Visualizer

Starting Position

Search Depth

Depth 3

Nodes: —

Depth levels: —

Legend

MAX turn (X maximises)

MIN turn (O minimises)

X wins

O wins

Draw

Gold edge = best move

Minimax Tree Select a node to inspect its board state.

Click Build Tree to generate the minimax tree

Node Inspector

Click a node in the tree

Heuristic Function

Edit the evaluation function below. It runs at leaf nodes and depth-limit nodes. board is a 9-element array (1=X, −1=O, 0=empty). Returns a number: positive values favour X (MAX), negative favour O (MIN).