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Dice Chess Engine

Infrastructure Analysis

Deploying a Scala 3 Chess Engine introduces highly specific compute requirements. Unlike typical CRUD apps, a chess engine is fundamentally CPU-bound (move search, bitwise ops) and RAM-hungry (Transposition Tables for caching evaluations).

Here is an objective evaluation of our hosting options.

📊 Comparative Assessment Matrix

Section titled “📊 Comparative Assessment Matrix”
Feature🥧 Raspberry Pi 4 (4GB)💻 Asus FX570UD (8GB)☁️ Oracle Cloud (Ampere)
CPU PerformanceLow (ARMv8 A72)High (Intel Core i7/i5 Mobile)Medium-High (Ampere A1 ARM)
RAM Availability4 GB (Dedicated)8 GB (Shared / Congested)Up to 24 GB (Free Tier)
Max Search DepthLow (Slow single-thread)High (Fast clock speed)High (4 True Cores)
Transposition CacheSmall (<500 MB)Moderate (<1 GB due to load)Huge (4 GB to 16 GB)
Network ReliabilityDependent on Home ISPDependent on Home ISPExcellent (Datacenter)
Cost$0 (Owned)$0 (Owned)$0 (Forever Free)
ArchitectureARM64x86_64ARM64

🔍 Detailed Node Evaluation

Section titled “🔍 Detailed Node Evaluation”

1. Raspberry Pi 4 (4GB RAM)

Section titled “1. Raspberry Pi 4 (4GB RAM)”
  • The Verdict: Too weak for Production Search.
  • Why: While it runs 24/7, its Cortex-A72 cores have extremely weak floating-point performance and low clock speed compared to modern CPUs. Using an Expectimax search algorithm parallelized with Virtual Threads on this node would yield a very weak engine that takes too long to evaluate moves.
  • Best Use: A lightweight gateway, dev mock, or telemetry receiver.

2. Asus FX570UD (Ubuntu Server, 8GB RAM)

Section titled “2. Asus FX570UD (Ubuntu Server, 8GB RAM)”
  • The Verdict: Excellent CPU, but severe RAM congestion.
  • Why: The Intel CPU has fantastic single-core turbo speeds, meaning its move generation and evaluation loop would be blazing fast. However, 8GB RAM is already a bottleneck if it hosts heavy stacks like Immich (Postgres + machine learning background workers for face recognition), AdGuard, Vaultwarden, and an Nginx proxy.
  • Adding a Java Virtual Machine (JVM) or running heavy compilation cycles could trigger Linux Out-Of-Memory (OOM) killer events, destabilizing your existing home services.
  • Best Use: Staging environment, local quick benchmarks, or build node.

3. Oracle Cloud Free Tier (Ampere A1)

Section titled “3. Oracle Cloud Free Tier (Ampere A1)”
  • The Verdict: 🏆 The Ultimate Champion.
  • Why: Oracle’s “Always Free” tier offers up to 4 ARM64 Ampere Cores and up to 24 GB of RAM.
    • Transposition Tables (TT): In chess engines, doubling the TT size often results in a massive boost in ELO. Having access to 24GB RAM lets you dedicate 4-8GB strictly to the engine cache!
    • Parallelism: 4 dedicated cores perfectly complement the Virtual Threads (Ox) parallelized Expectimax search planned in Milestone v0.5.
    • Architecture Harmony: Your dev machine is a Mac (Apple Silicon ARM64), and Oracle’s Ampere is ARM64. This means your Docker containers will run natively on both without cross-compilation overhead.
    • Public Access: It gives you a public IP and stable egress for the WebSocket API (v0.6) so anyone can play against it without you exposing your home lab to the internet.
  • Best Use: Production engine hosting.

🎯 Strategic Recommendation: The Hybrid Approach

Section titled “🎯 Strategic Recommendation: The Hybrid Approach”

Instead of picking only one, we utilize a highly cost-effective and robust Multi-Tier Strategy:

Tier 1: Production (The Brain) 🧠 -> Oracle Cloud (ARM64)

Section titled “Tier 1: Production (The Brain) 🧠 -> Oracle Cloud (ARM64)”

Configure a single Oracle Free Tier VM with:

  • 2 to 4 Ampere OCPUs
  • 12 to 24 GB RAM
  • Public IP with Oracle Security Lists opening the WebSocket API port.
  • Result: A massive transposition table, enterprise network uptime, and zero interference with home Immich/AdGuard setups.

Tier 2: Delivery & Gateway 🚪 -> Asus Server (Home Lab)

Section titled “Tier 2: Delivery & Gateway 🚪 -> Asus Server (Home Lab)”

Use your Asus Laptop to:

  • Act as a Docker Registry or CI Runner to build the GraalVM images.
  • Serve the static Frontend PWA and use Nginx Proxy Manager to securely proxy traffic to the Oracle Cloud backend if necessary.

Tier 3: Development & Sandbox 💻 -> Apple Silicon Mac

Section titled “Tier 3: Development & Sandbox 💻 -> Apple Silicon Mac”

Build and run local benchmarks natively in the mise environment.

🚀 Next Steps

Section titled “🚀 Next Steps”
  1. Sign up for Oracle Cloud Free Tier and provision an Ubuntu VM.Standard.A1.Flex shape with 4 OCPUs and 24GB RAM.
  2. Upon reaching Milestone v1.0 (Production & Native Image), we will tailor the GraalVM native image target explicitly for ARM64 Linux, making deployment a single docker compose up -d command with sub-millisecond startup times.