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refactor: always use Monte Carlo (MCTSBot) for AI players #14

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Merged
devp merged 1 commit into from
Feb 1, 2026
Merged

refactor: always use Monte Carlo (MCTSBot) for AI players #14

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15 changes: 7 additions & 8 deletions src/App.tsx
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import { useState, useEffect, useMemo } from 'react';
import { Client } from 'boardgame.io/react';
import { Local } from 'boardgame.io/multiplayer';
import { RandomBot, MCTSBot } from 'boardgame.io/ai';
import { MCTSBot } from 'boardgame.io/ai';
import { games, gameIds, type GameDefinition } from './registry';

type AISettings = {
Expand Down Expand Up @@ -131,16 +131,15 @@ function createMCTSBot(game: GameDefinition['game']) {
};
}

function GameView({ gameId, definition }: { gameId: string; definition: GameDefinition }) {
function GameView({ definition }: { definition: GameDefinition }) {
const [aiSettings, setAiSettings] = useState<AISettings>({ player0: false, player1: false });

const GameClient = useMemo(() => {
// Use MCTSBot for tic-tac-toe (turn-based), RandomBot for others (like simultaneous RPS)
const useMCTS = gameId === 'tic-tac-toe';
const BotClass = useMCTS ? createMCTSBot(definition.game) : RandomBot;
// Always use MCTSBot (Monte Carlo Tree Search) for AI
const BotClass = createMCTSBot(definition.game);

// Build the bots configuration based on AI settings
const bots: Record<string, typeof RandomBot> = {};
const bots: Record<string, typeof BotClass> = {};
if (aiSettings.player0) {
bots['0'] = BotClass;
}
Expand All @@ -153,7 +152,7 @@ function GameView({ gameId, definition }: { gameId: string; definition: GameDefi
board: definition.Board,
multiplayer: Local({ bots: Object.keys(bots).length > 0 ? bots : undefined }),
});
}, [gameId, definition, aiSettings]);
}, [definition, aiSettings]);

return (
<div style={{ fontFamily: 'sans-serif' }}>
Expand Down Expand Up @@ -232,7 +231,7 @@ export function App() {
};

if (currentGame && games[currentGame]) {
return <GameView gameId={currentGame} definition={games[currentGame]} />;
return <GameView definition={games[currentGame]} />;
}

return <GameSelector onSelect={selectGame} />;
Expand Down