Live demo: https://scopa-ai.vovchenko.net/ Source: https://github.com/vlvovch/scopa-ai

Features:

- Three CPU levels (including MCTS expert with perfect memory) - LLM opponents (Claude, GPT, Gemini) — requires your own API keys (optional) - Real-time multiplayer (WebSocket) - Watch mode to spectate CPU/AI battles

Context: I’m a physicist and used Claude Code heavily to build this outside my usual domain.

Fun finding: the MCTS CPU consistently beats the LLMs. Not a fair fight (CPU runs thousands of simulations per move while LLMs just “reason”), but it’s interesting to watch.

Would appreciate feedback — especially: is there a good way to offer an LLM-opponent demo without accounts (so no BYO keys), while avoiding abuse/cost blowups?