Function chooseMove

chooseMove(state: ChessState, options?: ChessEngineOptions): ChessMove | null
Chooses a move with a small negamax alpha-beta search.

This is intentionally a rules engine, not a tournament engine: it searches legal positions, orders captures and promotions first, and evaluates material only. It has no opening book, transposition table, clock, or repetition scoring, which keeps it deterministic and small enough to run synchronously in a browser minigame.
Parameters
- state: ChessState
- options: ChessEngineOptions = {}
Returns ChessMove | null
Example
```
import { chooseMove } from '@datamoc/mw_games/board';
import { startingChess, applyMove } from '@datamoc/mw_games/board';

const state = startingChess();
const move = chooseMove(state, { depth: 2 });
if (move) applyMove(state, move); // the engine's own reply, played for it
```
- Defined in src/board/Engine.ts:54