From f7b87f29416f22da455939f4e5dedf8f399b972d Mon Sep 17 00:00:00 2001
From: Michess <michess@mischlabs.de>
Date: Mon, 13 Apr 2026 14:25:31 +0200
Subject: [PATCH] fix: use existsSync instead of require(fs) in ESM module

---
 server/src/controllers/stockfish.controller.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/server/src/controllers/stockfish.controller.ts b/server/src/controllers/stockfish.controller.ts
index 45efccd..14fd2ee 100644
--- a/server/src/controllers/stockfish.controller.ts
+++ b/server/src/controllers/stockfish.controller.ts
@@ -1,4 +1,5 @@
 import { spawn, ChildProcess } from "child_process";
+import { existsSync } from "fs";
 
 export interface StockfishLevel {
     level: number;
@@ -32,8 +33,7 @@ export class StockfishEngine {
         try {
             // Debian installs stockfish to /usr/games/stockfish
             const sfBin = ["/usr/games/stockfish", "/usr/bin/stockfish", "stockfish"]
-                .find(p => { try { require("fs").accessSync(p); return true; } catch { return false; } })
-                ?? "stockfish";
+                .find(p => existsSync(p)) ?? "stockfish";
 
             this.process = spawn(sfBin, [], {
                 stdio: ["pipe", "pipe", "pipe"],